good catch on that filter Mike. Gosh I do not know how many times I have replaced finals in this very same radio. Along with the TS-140. Each one had the AM carrier turned wide open. Thanks for sharing.
I regret not having continue studying electronics when I was younger, this is what I would have like to do in life... I wish I had a mentor with the knowledge you have... it is starting to be late in life to start a new career, buy lab equipement and rentabilize all of this... I feel I missed what I would have really enjoy doing in my life...
Hi Mike, I have a 757GX first model , but now it's dead in the water. Cracked a couple of transformers and a tech told me I'm sol. lol it was a great radio. Love your videos man!
I assume you mean the adjustable ferrite cores in the transformers are cracked. If so you should be able to remove the transformers, extract the broken cores and install new ones. Some times you can flip the core over and reinstall it. Depends on if there is enough of it left to allow full tuning range. Also depends on what type it is. If it has a hollow hex center that's the kind I'm talking about. If it has a straight slot like a regular screw it has to be replaced, can't flip those over.
I operated one of these for a short while and really enjoyed it. Very simple to operate no annoying menu functionality and worked with good enough performance for me. Nice to see you radio analyser in use again. Unfortunately since I bought the Chevy I don’t appear to have any spare change to buy test gear? I bet you had to fight that board out all the way LOL. Regards Chris. Must remember to try and tune into that time signal.
FT757gxii was my first hf rig. Being that I was a new ham and didn't know crap, I set the rig up exactly per the manual and used the stock microphone because I couldn't afford a better one. I was constantly accused of mods, etc. due to the tx audio quality, and it had a hot receiver. I wish I still had it now.
Great job Mike. The 757 aeries was and is an wonderful transceiver (even for it's almost 30 years age.). I hope that people checking out your clip for the first time didn't find the fact that you totally ignored the owners request to turn the radio up too 120 watts of output pompous on your part (it's an absurd request to begin with.) And only a golden screwdriver would gladly have done so for the owner of this 757. People who have never seen your clips before or don't know who you are should not find the fact that you ignored that request to be pompous. If they want a job done right then it should be sent to you or someone with your knowledge and expertise. If they want 120 watt HF transceiver they should send their equipment to a golden screwdriver who would gladly give them exactly what they want. Hell! Why not 150 watts?! Those people must understand that those jobs are and should be left to Golden screwdrivers. The fact that you turn down the am carrier to 25 Watts was absolutely the correct thing to do. I'm not familiar with any HF transceivers (of this vintage and even newer) that transmit more than 25 max Watts in amplitude modulation (5 watts minimum.) Those who have never dealt with you or are watching this particular video or any of your videos for the first time should know that they are getting top quality workmanship. And no matter their request for a ridiculous modification they should know and understand that the final decision on whether you will follow the directions to the t will be up to you in the end. This video substantiates that statement. I've been doing business with you for almost four years now and have been nothing more than happy with every single job that you've done on every single piece of equipment I've sent you. I enjoyed this video immensely. I always like the seven five seven series yeasu and although I've never owned one. I have considered purchasing one in the past but the prices on much more modern HF transceivers and no cycle for another year or two makes it a buyer's market. I've heard several of them on SSB and if repaired/restored and aligned properly should and do sound as good or better than any SSB 11 meter modern transceiver on the market. Great work. Excellent video. Keep up the good work my brother. 73
No, it's not an absurd request if you listened to why I requested it. The DRIVE control s on these rigs are very sensitive and at low power are nearly impossible to manage when attempting to drive an amp. If the carrier is set to 25 AM watts when the DRIVE is maximum, it's cuts the power to ZERO by the time it hits 3 oclock. The rest of the travel is useless. If the carrier is set to 100+ at maximum, I have adjustment all the way down to 9 oclock. This makes it much easier and much more precise when driving an amp and you need 2, 3, or 4, watts output from the radio. Listen to what I said before shooting your mouth.
@@TheLonesometoad my reply was never meant as an insult. I apologize that you took it that way. If you have legitimate reasons for wanting your transceiver transmitting at 120 watts it's obviously your prerogative. Using the word absurd may have been a bit over-the-top and once again I apologize. I hope that when you get it back the 757 works better then it did when it was brand new. In many cases depending on who's doing the work a 30 or even 40 year old piece of equipment with proper repair and or manufacturer manual amended modifications performed probably on a piece of equipment cen and usually will have that piece of equipment working better than new. I wish you nothing but the best. And I will reiterate on my original reply the seven five seven isn't excellent transceiver and will most likely sound better on SSB then any modern 11 meter CB radio export or not. Modern or vintage. Good luck. 73's
@@zooyawk4526 : I understand your opinions on the operations of these rigs, as I share them them as well. I , too, am appalled by some of the ridiculous modifications being done to most of the radio equipment today. You see, I'm not a newb, as I have been "radioing" since about 1962. I started out this journey using an RCA MK VII radio. Through the years I have learned to perform many of my own repairs. But with no formal training, I recognize my limitations and seek out someone who has the knowledge and experience to perform the task I require. I, too, apologize for my first response as I was probably a bit sensitive over the ridicule and condescension I was receiving from the monologue in the video. Over the years I have owned about 7 of these 757s as I find them to be extremely versatile and quality units. I know these rigs and their capabilities and I know when I need something done. I know better than to take a 25Watt radio and jack over 100W out of it. Fact is, I NEVER run more than 12 Watts of AM carrier on these rigs. But as I said, it's a matter of being able to more easily adjust the output. Another way to achieve this would be to use a pot of different value. That would involve much more work and expense. Anyhow, I'm sorry for jumping on you as I did,. It just seemed to me at the time that you didn't listen to what my note said and just assumed I was another Joe Blow CBr looking for the rainbow at the end of a magic golden screwdriver, when nothing could be further from the truth. I did receive the radio back working very well and it has already been sold. I now run an FT-990 with an MD-1B and love it.
I had one of these. traded it for a fifty foot crank up tower. never did get the tower . sold it to a a guy that worked for the electric company. I got a 706 icon mine was a nice radio. the seven 706 had two meter and at that time it was my ticket.
There are actually a lot of filter manufacturers out there. Here's just a few. Telcona AG, Token, Bomar, Raltron, Fronter Electronics Co., Network Sciences, Vectron, NDK, ECS Inc., Auris, Oscilent, Filternetics INC., Murata.
@@mikesradiorepair ok mike let's say I want a narrow filter in my rci2950 to reject electrical noise in my mobile in to what would I use murata 455 I ?
That 25W carrier is 100W-PEP, so it technically still does 100W on AM. The 2x2879 final transistors could potentially do 200W-PEP in AM or SSB mode, but the PA isn't designed for that and since those transistors are outrageously expensive and almost unobtainium status, it's not worth going for full smoke.
I acquired my General ticket last year and I have a used Yaesu FT-757GX and an LK500ZB Amp Supply Amp I inherited from my deceased uncle KK4LZ. I have read the FT-757GX Operator's manual and I am not sure which connection I plug the rca jack in on the back of the radio. Does the LK500ZB have a relay coil voltage over 50 volts? According to the manual the internal control relay in the FT-7 5 7GX is not designed to handle high voltage (above 50 V) or current (above 400 mA). Can you advise how I connect the radio to this amp? Thank you
@@bblod4896 The Gearwrench set looks to be too big, it's meant for car radios and antennas, not the smaller size like on the Yaesu. The smallest socket might work. I hate needing special tools for only occasional use, but they're a godsend when even a modified tool does not work well. I have a special thin-walled 3/16-inch nut driver made by AMP, Inc. just for the locking hardware on D-series connectors (like RS-232 or VGA video style). Before getting it I'd used a 1/4-inch drive socket ground down, but it would still not clear the backshell properly.
I just bought one 2 weeks ago from eBay same gx2 still haven check it yet but the receiving is good just when transmit it keep blowing fuses , I think it may need a pair of finals
One issue that has been found with some radios and the failing 455KHz filters is that there is voltage being applied across the filter. They should actually be isolated from the DC voltage by coupling capacitors on their input and output pins. Just thought I would mention that.
Where are you located at I have a 757gx to which is giving me the same problem it looks like but I don't want to open it up because it's nothing it's not within my purview it was a motor in a car or she's me an engine won't have a problem
I had one of these. it was a great radio until the big nob broke. i had it fixed at a e s' in Wisconsin it never worked right after he fixed the channel knob
Keep seeing lots of radios on Ebay with a Mars mod. It’s a good reason for me to stay away. What else have they had done? A possible victim of the golden screwdriver. Do you see many Yaesu FT 817s with final problems?
Query... What are is the name of those cable ends? Where can I get those cable or cable ends for replacement? Have restored some radios and some of those cables are rather bad plus I would like a few for alignment and testing purposes.
Sure would like to have you go thew my Yaesu ft-102. I just bought still new in the box. And replace the caps and give it a clean bill of health. I only live 15 minutes away. Just not sure how to get in touch to bring it by? Enjoy your video's. 73,
Here I explain what happens with my Yaesu FT-450. A few days ago I made the mistake of trying a radio from a friend of mine when my FT-450 was on receiving, they had two different antennas but the separation between the antennas on the roof are 3 meters. When I was testing the radio in transmission I felt a burning smell from my friend and I realized that it was coming from my radio, at the moment I turned it off and when I turned it back on it had changed many things like: - TRANSMIT BUT DOES NOT GIVE ANY OUT POWER IN (AM) MODE ON ANY BAND. - THE SYSTEM (ALC) DOESN'T WORK, NEVER MARK ANYTHING ON THE DISPLAY, BEFORE IT WORKED VERY GOOD. - ESPECIALLY IN 6M (50MHZ) BEFORE HAD 100 WATT, NOW ONLY HAS 10WATT AND WHEN CW OR SSB TRANSFER FEELS MY VOICE OR NOISE IN THE RADIO HORN. - THE INTERNAL RADIO TUNER ANTENNA DOES NOT ADJUST IN SOME BANDS AND HIGH SWR WITH GHOST ANTENNA DUMMY 50OHM ADJUST 1: 1 ALMOST ALL BANDS, I REMOVED THE RADIO TUNER ANTENNA AND CONTINUES WITH THE SAME PROBLEM, THE PROBLEM IS NOT THE INT-TUNER OF THE FT-450. - BEFORE ALMOST ALL BANDS DRAWN 100 WATT CW AND ALMOST 90 WATT SSB. NOW HIM RESULT WITH LOAD DUMMY 50OHM PER BAND IS: 160m ... fm .... 100 watt cw .... 100 watt am .... no carrier no power fonia and digital .. 100 watt ----------------------------- 80m ... fm .... 100 watt cw .... 100 watt am .... no carrier no power fonia and dgital .. 100 watt ----------------------- 40m .... fm .... 70 watt cw .... 70 watt am .... no carrier no power fonia and digital ..40 watt ----------------------- 30m ....... fm .... 70 watt cw .... 70 watt am .... no carrier no power ----------------------- 20m ....... fm .... 70 watt cw .... 70 watt am .... no carrier no power fonia and digital .. 40 watt ----------------------- 17m ....... fm .... 50 watt cw .... 50 watt am .... no carrier no power fonia and digital .. 30 watt ------------------------ 15 m ........ fm .... 80 watt cw .... 80 watt am .... no carrier no power fonia and digital .. 80 watt ------------------------- 12m ......... fm .... 80 watt cw .... 80 watt am .... no carrier no power fonia and digital .. 50 watt When I transmit on the phone you can hear it on the radio horn ------------------------- 10m ......... fm .... 50 watt cw .... 50 watt am .... 10watt fonia and digital .. 50 watt --------------------------- 6m ......... fm .... 20 watt cw .... 20 watt am .... 20 watt fonia and digital .. 20 watt, When I transmit in fonia it is heard in the radio horn. He also seems to be crazy, he makes noise and he seems to have serious problems. I RESET HOME OF THE RADIO AND CONTINUE WITH THE SAME PROBLEM, THE PARAMETERS THE HIDDEN MENU IS CORRECT, THE RECEPTION IS CONSIDERED GOOD IN ALL THE BANDS AND MODES. I CHECK THE BOARDS OR BOARDS AND ALL ARE IN GOOD PHYSICAL CONDITION, NONE COMPONENT SEEMS TO BE BURNED. BEFORE MAKING THE ERROR MY RADIO WAS WORKING NO PROBLEM WITH 100 WATT IN ALL THE BANDS AND THE AUT INT ALSO WORKED NO PROBLEM. I HOPE THAT WITH THESE DATA YOU CAN GIVE ME AN IDEA OR OPINION OF WHAT PROBLEM THE TEAM HAS THOUSAND THANKS IN ADVANCE. note :Now I have realized that when I press the ATT or IPO key that is only for reception it falls even more the power in all the bands, in addition I tested it in reception 6m 50mhz and it has problems also at the reception . BEST 73.- EDUARDO CO8LY
I have a radio I would like for you to check everything out and get it like it should be. It's definitely been worked on and modified its a Cobra 150 GTL DX. I know they have their problems.
thanks for the detailed video repairing this radio and your nice sense of humor !! !! i have the previous model the 757 gx , problem is that the high power transmitting is not more that 50 watts fm mod and on ssb is about 30 to 40 or 50 if i shout loud on the mic , the drive potentiometer on the right side is at middle and gives about 5 or less watts and full right position gives about 50w max , i believe something wrong with the final rf power transistors,,,, any ideas what might be wrong ? thanks is advance pete , i am located in Europe Greece , where are you located ? U.K. or U.S. ? thanks my greetings
Mike, I have a Yaesu 757-GXII that has worked perfectly since I purchased it new in 1986. I've had so many years of enjoyment from this rig, but it just recently died. Can I send it to you to be repaired? If not, can you recommend a repair place? Thanks so much! Sincerely, Stan - WB5UDI
Are those for the circular nuts with radial grooves on the face? With a center pin sticking out to keep them centered in the jack? I have not seen those since the mid-1970's! (I'm old-school, I'd call them 1/8" and 3/32" instead of 3.5mm and 2.5mm! ☺)
They are made by Xcelite and model numbers are TW-32 and TW-140. They have a round bottom with a center pin sticking out that fits inside the jack and 2 protruders that go in the slots of the knurled nuts on 3.5 mm and 2.5 mm jacks. They are no longer made.
Kinda frustrating. Its not much but I give $7.00 a month to help you out and I cant even get an e mail back. And all im trying to do is give you more money to work on some radios for me. If you are really just that busy im sorry for even saying anything! Sincerely Adam Meece 😞
Hi Mike. I have a real project for you, if interested? It's a IC-745 with almost indescribable issues. If you're able to fit it in please let me know. KD9OKT
spinning the knob like you were is what broke mine. I had about five years spinning that main channel knob
good catch on that filter Mike. Gosh I do not know how many times I have replaced finals in this very same radio. Along with the TS-140. Each one had the AM carrier turned wide open. Thanks for sharing.
Great video! Your knowledge of radio repair is amazing. Sure do miss your videos. God Bless.
I regret not having continue studying electronics when I was younger, this is what I would have like to do in life... I wish I had a mentor with the knowledge you have... it is starting to be late in life to start a new career, buy lab equipement and rentabilize all of this... I feel I missed what I would have really enjoy doing in my life...
Hi Mike, I have a 757GX first model , but now it's dead in the water. Cracked a couple of transformers and a tech told me I'm sol. lol it was a great radio. Love your videos man!
I assume you mean the adjustable ferrite cores in the transformers are cracked. If so you should be able to remove the transformers, extract the broken cores and install new ones. Some times you can flip the core over and reinstall it. Depends on if there is enough of it left to allow full tuning range. Also depends on what type it is. If it has a hollow hex center that's the kind I'm talking about. If it has a straight slot like a regular screw it has to be replaced, can't flip those over.
good catch Mike you were lucky as working on this radio can end up in a rabbit hole....
@31:44 Done that :) Great video, and thanks for that inside the filter looksie.
Great video, love the way you explain everything. Love your channel, I just subscribed.
the 757 GX II is my favorite rig!
I operated one of these for a short while and really enjoyed it. Very simple to operate no annoying menu functionality and worked with good enough performance for me. Nice to see you radio analyser in use again. Unfortunately since I bought the Chevy I don’t appear to have any spare change to buy test gear? I bet you had to fight that board out all the way LOL. Regards Chris. Must remember to try and tune into that time signal.
FT757gxii was my first hf rig. Being that I was a new ham and didn't know crap, I set the rig up exactly per the manual and used the stock microphone because I couldn't afford a better one. I was constantly accused of mods, etc. due to the tx audio quality, and it had a hot receiver. I wish I still had it now.
I am amazed by the tiny wires in this radio
Great video and I have the same problem on receive… can you tell me the part details of the ceramic filter for the 757?
Great job Mike. The 757 aeries was and is an wonderful transceiver (even for it's almost 30 years age.). I hope that people checking out your clip for the first time didn't find the fact that you totally ignored the owners request to turn the radio up too 120 watts of output pompous on your part (it's an absurd request to begin with.) And only a golden screwdriver would gladly have done so for the owner of this 757. People who have never seen your clips before or don't know who you are should not find the fact that you ignored that request to be pompous. If they want a job done right then it should be sent to you or someone with your knowledge and expertise. If they want 120 watt HF transceiver they should send their equipment to a golden screwdriver who would gladly give them exactly what they want. Hell! Why not 150 watts?! Those people must understand that those jobs are and should be left to Golden screwdrivers. The fact that you turn down the am carrier to 25 Watts was absolutely the correct thing to do. I'm not familiar with any HF transceivers (of this vintage and even newer) that transmit more than 25 max Watts in amplitude modulation (5 watts minimum.) Those who have never dealt with you or are watching this particular video or any of your videos for the first time should know that they are getting top quality workmanship. And no matter their request for a ridiculous modification they should know and understand that the final decision on whether you will follow the directions to the t will be up to you in the end. This video substantiates that statement. I've been doing business with you for almost four years now and have been nothing more than happy with every single job that you've done on every single piece of equipment I've sent you. I enjoyed this video immensely. I always like the seven five seven series yeasu and although I've never owned one. I have considered purchasing one in the past but the prices on much more modern HF transceivers and no cycle for another year or two makes it a buyer's market. I've heard several of them on SSB and if repaired/restored and aligned properly should and do sound as good or better than any SSB 11 meter modern transceiver on the market. Great work. Excellent video. Keep up the good work my brother. 73
No, it's not an absurd request if you listened to why I requested it. The DRIVE control s on these rigs are very sensitive and at low power are nearly impossible to manage when attempting to drive an amp. If the carrier is set to 25 AM watts when the DRIVE is maximum, it's cuts the power to ZERO by the time it hits 3 oclock. The rest of the travel is useless. If the carrier is set to 100+ at maximum, I have adjustment all the way down to 9 oclock. This makes it much easier and much more precise when driving an amp and you need 2, 3, or 4, watts output from the radio. Listen to what I said before shooting your mouth.
@@TheLonesometoad my reply was never meant as an insult. I apologize that you took it that way. If you have legitimate reasons for wanting your transceiver transmitting at 120 watts it's obviously your prerogative. Using the word absurd may have been a bit over-the-top and once again I apologize. I hope that when you get it back the 757 works better then it did when it was brand new. In many cases depending on who's doing the work a 30 or even 40 year old piece of equipment with proper repair and or manufacturer manual amended modifications performed probably on a piece of equipment cen and usually will have that piece of equipment working better than new. I wish you nothing but the best. And I will reiterate on my original reply the seven five seven isn't excellent transceiver and will most likely sound better on SSB then any modern 11 meter CB radio export or not. Modern or vintage. Good luck. 73's
@@zooyawk4526 : I understand your opinions on the operations of these rigs, as I share them them as well. I , too, am appalled by some of the ridiculous modifications being done to most of the radio equipment today. You see, I'm not a newb, as I have been "radioing" since about 1962. I started out this journey using an RCA MK VII radio. Through the years I have learned to perform many of my own repairs. But with no formal training, I recognize my limitations and seek out someone who has the knowledge and experience to perform the task I require.
I, too, apologize for my first response as I was probably a bit sensitive over the ridicule and condescension I was receiving from the monologue in the video. Over the years I have owned about 7 of these 757s as I find them to be extremely versatile and quality units. I know these rigs and their capabilities and I know when I need something done. I know better than to take a 25Watt radio and jack over 100W out of it. Fact is, I NEVER run more than 12 Watts of AM carrier on these rigs. But as I said, it's a matter of being able to more easily adjust the output. Another way to achieve this would be to use a pot of different value. That would involve much more work and expense. Anyhow, I'm sorry for jumping on you as I did,. It just seemed to me at the time that you didn't listen to what my note said and just assumed I was another Joe Blow CBr looking for the rainbow at the end of a magic golden screwdriver, when nothing could be further from the truth.
I did receive the radio back working very well and it has already been sold. I now run an FT-990 with an MD-1B and love it.
Iam getting one that filter has a cold solder joints
I had one of these. traded it for a fifty foot crank up tower. never did get the tower . sold it to a a guy that worked for the electric company. I got a 706 icon mine was a nice radio. the seven 706 had two meter and at that time it was my ticket.
Hi Mike, Do you have the info on checking and adjusting the S-Meter calibration ? Cheers
Dang i was wrong were do you get them filters
Do you know what tuning capacitor to tweak to fine tune TX frequency, mine is slightly off?
Filters absorbing moisture can be a real pain and they're getting harder to find and more expensive to get. Thanks for the tips Mike!
There are actually a lot of filter manufacturers out there. Here's just a few. Telcona AG, Token, Bomar, Raltron, Fronter Electronics Co., Network Sciences, Vectron, NDK, ECS Inc., Auris, Oscilent, Filternetics INC., Murata.
@@mikesradiorepair Stocking up with Murata's on eBay can get a bit pricey but sometimes you can find good deals just for the junk box.
@@mikesradiorepair ok mike let's say I want a narrow filter in my rci2950 to reject electrical noise in my mobile in to what would I use murata 455 I ?
Hi, My 40 yr ! old 757 is stuck in TX mode, only power is connected. Any ideas? Gene
That 25W carrier is 100W-PEP, so it technically still does 100W on AM. The 2x2879 final transistors could potentially do 200W-PEP in AM or SSB mode, but the PA isn't designed for that and since those transistors are outrageously expensive and almost unobtainium status, it's not worth going for full smoke.
I acquired my General ticket last year and I have a used Yaesu FT-757GX and an LK500ZB Amp Supply Amp I inherited from my deceased uncle KK4LZ. I have read the FT-757GX Operator's manual and I am not sure which connection I plug the rca jack in on the back of the radio. Does the LK500ZB have a relay coil voltage over 50 volts? According to the manual the internal control relay in the FT-7 5 7GX is not designed to handle high voltage (above 50 V) or current (above 400 mA). Can you advise how I connect the radio to this amp?
Thank you
Smart man. Set the radio up properly and let the customer blow it up.
A link for the spanner tool would be appreciated. Thanks for the video.
Will the GEARWRENCH 41680D on amazon work? its hard to tell size.
@@AndrewPrinster
Might work.
@@bblod4896 The Gearwrench set looks to be too big, it's meant for car radios and antennas, not the smaller size like on the Yaesu. The smallest socket might work.
I hate needing special tools for only occasional use, but they're a godsend when even a modified tool does not work well. I have a special thin-walled 3/16-inch nut driver made by AMP, Inc. just for the locking hardware on D-series connectors (like RS-232 or VGA video style). Before getting it I'd used a 1/4-inch drive socket ground down, but it would still not clear the backshell properly.
@@bobblum5973
That is an idea, thanks.
I just bought one 2 weeks ago from eBay same gx2 still haven check it yet but the receiving is good just when transmit it keep blowing fuses , I think it may need a pair of finals
Love the videos Mike. I learn lots, and the tool tips are gold! 73!
One issue that has been found with some radios and the failing 455KHz filters is that there is voltage being applied across the filter. They should actually be isolated from the DC voltage by coupling capacitors on their input and output pins. Just thought I would mention that.
Where are you located at I have a 757gx to which is giving me the same problem it looks like but I don't want to open it up because it's nothing it's not within my purview it was a motor in a car or she's me an engine won't have a problem
right now i have ken wood five ninety and a icom 73OO hundred. I enjoyed that radio until the tuning knob broke. I traded it for a crank up tower.
Great video!
Great repair 👍👍
that crushed coax might be part of the problem?
I had one of these. it was a great radio until the big nob broke. i had it fixed at a e s' in Wisconsin it never worked right after he fixed the channel knob
The nut remover tool is sometimes listed on the bay as an X tool.
Keep seeing lots of radios on Ebay with a Mars mod. It’s a good reason for me to stay away. What else have they had done? A possible victim of the golden screwdriver. Do you see many Yaesu FT 817s with final problems?
Good work sir👍
When you were talking about your tools. The first glance of your destuffing tool looked like a water key to me.
what do you adjust to calibrate freq readout when i am on T5 the readout its 554.8
Query... What are is the name of those cable ends? Where can I get those cable or cable ends for replacement? Have restored some radios and some of those cables are rather bad plus I would like a few for alignment and testing purposes.
Hello friend, I have a radio like this, I've been trying to fix it for a while now, could you give me some guidance?
Hi Mike, wich replacement number I can use for that ceramic filter? Thanks, Alex
Hello bro, why you didn't answer me bro, Can I sen you mine to fix ??.
Very good video 👍⚛
Sure would like to have you go thew my Yaesu ft-102. I just bought still new in the box. And replace the caps and give it a clean bill of health. I only live 15 minutes away. Just not sure how to get in touch to bring it by? Enjoy your video's. 73,
what about ni power pls 73s
Here I explain what happens with my Yaesu FT-450.
A few days ago I made the mistake of trying a radio from a friend of mine when my
FT-450 was on receiving, they had two different antennas but the separation
between the antennas on the roof are 3 meters. When I was testing the radio in transmission
I felt a burning smell from my friend and I realized that it was coming from my radio, at the moment
I turned it off and when I turned it back on it had changed many things like:
- TRANSMIT BUT DOES NOT GIVE ANY OUT POWER IN (AM) MODE ON ANY BAND.
- THE SYSTEM (ALC) DOESN'T WORK, NEVER MARK ANYTHING ON THE DISPLAY, BEFORE IT WORKED
VERY GOOD.
- ESPECIALLY IN 6M (50MHZ) BEFORE HAD 100 WATT, NOW ONLY HAS 10WATT AND WHEN
CW OR SSB TRANSFER FEELS MY VOICE OR NOISE IN THE RADIO HORN.
- THE INTERNAL RADIO TUNER ANTENNA DOES NOT ADJUST IN SOME BANDS AND HIGH SWR
WITH GHOST ANTENNA DUMMY 50OHM ADJUST 1: 1 ALMOST ALL BANDS, I REMOVED
THE RADIO TUNER ANTENNA AND CONTINUES WITH THE SAME PROBLEM, THE PROBLEM IS NOT
THE INT-TUNER OF THE FT-450.
- BEFORE ALMOST ALL BANDS DRAWN 100 WATT CW AND ALMOST 90 WATT SSB. NOW HIM
RESULT WITH LOAD DUMMY 50OHM PER BAND IS:
160m ...
fm .... 100 watt
cw .... 100 watt
am .... no carrier no power
fonia and digital .. 100 watt
-----------------------------
80m ...
fm .... 100 watt
cw .... 100 watt
am .... no carrier no power
fonia and dgital .. 100 watt
-----------------------
40m ....
fm .... 70 watt
cw .... 70 watt
am .... no carrier no power
fonia and digital ..40 watt
-----------------------
30m .......
fm .... 70 watt
cw .... 70 watt
am .... no carrier no power
-----------------------
20m .......
fm .... 70 watt
cw .... 70 watt
am .... no carrier no power
fonia and digital .. 40 watt
-----------------------
17m .......
fm .... 50 watt
cw .... 50 watt
am .... no carrier no power
fonia and digital .. 30 watt
------------------------
15 m ........
fm .... 80 watt
cw .... 80 watt
am .... no carrier no power
fonia and digital .. 80 watt
-------------------------
12m .........
fm .... 80 watt
cw .... 80 watt
am .... no carrier no power
fonia and digital .. 50 watt
When I transmit on the phone you can hear it on the radio horn
-------------------------
10m .........
fm .... 50 watt
cw .... 50 watt
am .... 10watt
fonia and digital .. 50 watt
---------------------------
6m .........
fm .... 20 watt
cw .... 20 watt
am .... 20 watt
fonia and digital .. 20 watt, When I transmit in fonia it is heard in the
radio horn. He also seems to be crazy, he makes noise and he seems to have serious
problems.
I RESET HOME OF THE RADIO AND CONTINUE WITH THE SAME PROBLEM, THE PARAMETERS
THE HIDDEN MENU IS CORRECT, THE RECEPTION IS CONSIDERED GOOD IN ALL
THE BANDS AND MODES.
I CHECK THE BOARDS OR BOARDS AND ALL ARE IN GOOD PHYSICAL CONDITION, NONE
COMPONENT SEEMS TO BE BURNED. BEFORE MAKING THE ERROR MY RADIO WAS WORKING
NO PROBLEM WITH 100 WATT IN ALL THE BANDS AND THE AUT INT ALSO WORKED
NO PROBLEM.
I HOPE THAT WITH THESE DATA YOU CAN GIVE ME AN IDEA OR OPINION OF WHAT PROBLEM
THE TEAM HAS THOUSAND THANKS IN ADVANCE.
note :Now I have realized that when I press the ATT or IPO key that is only for reception it falls
even more the power in all the bands, in addition I tested it in reception 6m 50mhz and it has problems
also at the reception .
BEST 73.- EDUARDO CO8LY
I would like to send u my gx2 for a physical tune up.where are u located
I have a radio I would like for you to check everything out and get it like it should be. It's definitely been worked on and modified its a Cobra 150 GTL DX. I know they have their problems.
thanks for the detailed video repairing this radio and your nice sense of humor !! !! i have the previous model the 757 gx , problem is that the high power transmitting is not more that 50 watts fm mod and on ssb is about 30 to 40 or 50 if i shout loud on the mic , the drive potentiometer on the right side is at middle and gives about 5 or less watts and full right position gives about 50w max , i believe something wrong with the final rf power transistors,,,, any ideas what might be wrong ? thanks is advance pete , i am located in Europe Greece , where are you located ? U.K. or U.S. ? thanks my greetings
Come back mike, lol I have a couple radios that need a real technician.
Good radio even by today's standards. No menus is a plus
Mike, I have a Yaesu 757-GXII that has worked perfectly since I purchased it new in 1986. I've had so many years of enjoyment from this rig, but it just recently died. Can I send it to you to be repaired? If not, can you recommend a repair place? Thanks so much! Sincerely, Stan - WB5UDI
The problem folks look at the pair of 2SC2879 and believe to go get over 100 watts
Mike put up new videos? guess I'm staying up late.
maybe his antenna had fell down ? !
Mike, are you still accepting radios for repair? How do I schedule a repair?
Thanks
I have two tools made by Xcellite for removing nuts on 2.5 and 3.5 mm nuts on earphone jacks. They are called terminal tools.
Are those for the circular nuts with radial grooves on the face? With a center pin sticking out to keep them centered in the jack? I have not seen those since the mid-1970's! (I'm old-school, I'd call them 1/8" and 3/32" instead of 3.5mm and 2.5mm! ☺)
They are made by Xcelite and model numbers are TW-32 and TW-140. They have a round bottom with a center pin sticking out that fits inside the jack and 2 protruders that go in the slots of the knurled nuts on 3.5 mm and 2.5 mm jacks. They are no longer made.
Safety factors are for the engineers not the users
Kinda frustrating. Its not much but I give $7.00 a month to help you out and I cant even get an e mail back. And all im trying to do is give you more money to work on some radios for me. If you are really just that busy im sorry for even saying anything! Sincerely Adam Meece 😞
That poor radio is going in the wrong hands might just put a hammer to it.😣its sad its in beautiful condition but bye bye 10 4 yuck😪
Hi Mike. I have a real project for you, if interested? It's a IC-745 with almost indescribable issues. If you're able to fit it in please let me know. KD9OKT
Oh man, don't talk so much, just get to the point. Other than that, good job!!!