I had a Frog7 many years ago. A great receiver, I picked up many SW broadcasts with it from my QTH in NZ. A joy to use, easy to tune and good audio. A great application of the Barlow-Wadley System.
Thanks! Static only can be tough to fix, it could be detuning or a fault in one of the RF amplifier stages. The oscillators are likely working fine and so is the AF section.
Did you know that the very first few models did NOT have a fine tune knob? Guess what! Yours is one of the very first and extremely rare frg 7's.😮 Hope for you you stil have it😊
HI, I've just bought one of these and am hoping to restore it. It does work so I don't want to upset anything but there is a lot of dust on the circuit boards. Should I clean it or leave well alone? Thanks for the video, it's very helpful.
Hi, thanks! If the receiver works well and has good sensitivity, then I'd leave it alone. The dust inside won't necessarily hurt, but if you want, I'd clean it with a pressurized dust spray.
I am having trouble removing the cover of my yaesu frg 7000 (which looks very similar to that of the frg 7) and I only managed to slide it off by about 6cm because it met some internal obstruction. Did you have to remove also the leather handle in order to remove the cover? Thanks.
I have not taken an FRG 7000 apart before, but for the FRG 7 I didn't have to remove the handle to take the cover off. If it is obstructed, you want to avoid damaging any internal components, so I'd suggest to carefully try to look inside to see if there is a lip or a ground wire that is blocking the cover from being removed.
A little confusion at 7 minute mark with 'select band 'A' but the knob points to knob 'B' ? Am I misunderstanding or was is parallax error on your part ? Also the model that you demonstrate is lacking the Fine tune facility and Know ...any feedback would be appreciated Kind regards Alex
I think you are right, that the knob is on B so we are really tuning B frequency range which is 1.6-4MHz. The model I have just has the main tuning knob, and with a steady hand I think it is adequate for fine tuning, but I am guessing that they added the fine tune knob on other models to help to really tune in on narrow bandwidth SSB or code transmissions.
Nobody is writing something about that great Barlow-Wadley system! Its is the most important issue in this FRG-7 radio receiver. Only used with 230 volts AC. Only some meters of wire indoors is enough for a very good reception. Did you not know the Barlow-Wadley system? Greetings from the Netherlands.❓
From what I know about the Barlow-Wadley system is that it is the oscillator and band selector circuit that lets you tune in 1MHz increments. It is known for its stability. This circuit is a fundamental part of this receiver and it is in all FRG-7s - the ones that work with 120VAC or 230VAC - as far as I know. If you have more information about this, it would be very interesting to know.
@@ztechalmanac3194 Well, Sir, my FRG-7 has also A FINE-TUNING KNOB, on te RIGHT SIDE of the MAIN-TUNING-DIAL! Very easy! So, i know there are more models of this great receiver! Happpy 2021 and lots of succes with your hobby! From the Netherlands!
Hi I like the two videos you have done on the FRG-7 and the restoration. After looking at the receiver you are working on I realized there is a knob missing above the volume knob. Not sure why they produced these receivers with and without the fine tune knob. My receiver was purchased not long after they were available here in Australia and it has the fine tune knob. Maybe they just realized that there were too many knobs and decided to drop the fine tune knob. Do you know why they removed the fine tune knob? Keep up the good work. Regards Ernie from Australia
Happy to hear you’re enjoying the FRG-7 videos! I have seen these receivers with and without the fine tune knob, so they must have made them both. Don’t think it is an aftermarket modification on my receiver.
I've heard about these variations and from reading online it isn't clear if the manufacturer removed the fine tune knob or if it was an aftermarket kit or modification that people have done.
I need a little help if you have the time. I just received one as a present and I am trying to bring it back to life. It seems that someone made a bunch of modifications and now I'm not sure what is original and what is not. Trying to replace the lights now and convert it to LED lights. But for some reason on the line coming frim the lights switch.. I have 18 volts. Seems a little much to me knowing that the original light bulbs were 9v. That is also written on the little boards for the lights. I keep trying to think where is conected the line before the switch ? Where does the power come frim ? ))). Maybe you can help me out a bit if I don't bother much. Everything else seems to work fine.
The regulated voltage, per the manual should be 9V, so if you are seeing 18V that's due to a modification perhaps. Another reason is that the transformer is shot, or not set for the power line voltage you have. In any case, even if the voltage is 18V, just put a 1.2Kohm resistor in series with the LED so that you get 15mA current through it, and avoid burning it out.
@@ztechalmanac3194 thank you so much. Indeed I've been looking in the schematic and the actual wiring... and there was a modification I didn't know about. No wonder I was keep burning resistors. I changed everything as in the factory schematic and made the modifications for LED lights. Is a bit colored now as I didn't had enough LEDs to have white light as intended. I will replace them when doing the proper cleanup of the receiver as the condition is not so great so there will be a lot of cleaning to do inside. But for now it works and I can use it until I have the tine to properly take care of it. Thanks so much again. 73, YO6DXE. P.S. Really nice receiver. Glad I now have one so I can test homemade TX or TRX and listen into the receiver hehehe.
@@dxexplorer Glad you found out that the receiver was modified. It is the case with so many of these receivers. Thanks for sharing your call sign, I'll listen for you if your power is high enough to reach here.
The Megahertz knob should turned so the light goes out. That tunes the station more accurately.
I had a Frog7 many years ago. A great receiver, I picked up many SW broadcasts with it from my QTH in NZ. A joy to use, easy to tune and good audio. A great application of the Barlow-Wadley System.
Thanks for the explanation. Mine receives nothing - only static. Videos like this keep those receivers alive.
Thanks! Static only can be tough to fix, it could be detuning or a fault in one of the RF amplifier stages. The oscillators are likely working fine and so is the AF section.
Did you know that the very first few models did NOT have a fine tune knob? Guess what! Yours is one of the very first and extremely rare frg 7's.😮 Hope for you you stil have it😊
I did not know mine is the first/rare model, but good to know! I still have it and it works great!
My radios have also a slight ripple in the audio. On the headphones you hear a dominant hum on strong stations
What is the internal switch for inside back- by battery box? Please-😊
HI, I've just bought one of these and am hoping to restore it. It does work so I don't want to upset anything but there is a lot of dust on the circuit boards. Should I clean it or leave well alone? Thanks for the video, it's very helpful.
Hi, thanks! If the receiver works well and has good sensitivity, then I'd leave it alone. The dust inside won't necessarily hurt, but if you want, I'd clean it with a pressurized dust spray.
I am having trouble removing the cover of my yaesu frg 7000 (which looks very similar to that of the frg 7) and I only managed to slide it off by about 6cm because it met some internal obstruction.
Did you have to remove also the leather handle in order to remove the cover?
Thanks.
I have not taken an FRG 7000 apart before, but for the FRG 7 I didn't have to remove the handle to take the cover off. If it is obstructed, you want to avoid damaging any internal components, so I'd suggest to carefully try to look inside to see if there is a lip or a ground wire that is blocking the cover from being removed.
A little confusion at 7 minute mark with 'select band 'A' but the knob points to knob 'B' ? Am I misunderstanding or was is parallax error on your part ? Also the model that you demonstrate is lacking the Fine tune facility and Know ...any feedback would be appreciated Kind regards Alex
I think you are right, that the knob is on B so we are really tuning B frequency range which is 1.6-4MHz. The model I have just has the main tuning knob, and with a steady hand I think it is adequate for fine tuning, but I am guessing that they added the fine tune knob on other models to help to really tune in on narrow bandwidth SSB or code transmissions.
Nobody is writing something about that great Barlow-Wadley system! Its is the most important issue in this FRG-7 radio receiver. Only used with 230 volts AC. Only some meters of wire indoors is enough for a very good reception. Did you not know the Barlow-Wadley system? Greetings from the Netherlands.❓
From what I know about the Barlow-Wadley system is that it is the oscillator and band selector circuit that lets you tune in 1MHz increments. It is known for its stability. This circuit is a fundamental part of this receiver and it is in all FRG-7s - the ones that work with 120VAC or 230VAC - as far as I know. If you have more information about this, it would be very interesting to know.
@@ztechalmanac3194 Well, Sir, my FRG-7 has also A FINE-TUNING KNOB, on te RIGHT SIDE of the MAIN-TUNING-DIAL! Very easy! So, i know there are more models of this great receiver! Happpy 2021 and lots of succes with your hobby! From the Netherlands!
Hi I like the two videos you have done on the FRG-7 and the restoration.
After looking at the receiver you are working on I realized there is a knob missing above the volume knob.
Not sure why they produced these receivers with and without the fine tune knob.
My receiver was purchased not long after they were available here in Australia and it has the fine tune knob.
Maybe they just realized that there were too many knobs and decided to drop the fine tune knob.
Do you know why they removed the fine tune knob?
Keep up the good work.
Regards Ernie from Australia
Happy to hear you’re enjoying the FRG-7 videos! I have seen these receivers with and without the fine tune knob, so they must have made them both. Don’t think it is an aftermarket modification on my receiver.
I've heard about these variations and from reading online it isn't clear if the manufacturer removed the fine tune knob or if it was an aftermarket kit or modification that people have done.
I need a little help if you have the time. I just received one as a present and I am trying to bring it back to life. It seems that someone made a bunch of modifications and now I'm not sure what is original and what is not. Trying to replace the lights now and convert it to LED lights. But for some reason on the line coming frim the lights switch.. I have 18 volts. Seems a little much to me knowing that the original light bulbs were 9v. That is also written on the little boards for the lights. I keep trying to think where is conected the line before the switch ? Where does the power come frim ? ))). Maybe you can help me out a bit if I don't bother much. Everything else seems to work fine.
The regulated voltage, per the manual should be 9V, so if you are seeing 18V that's due to a modification perhaps. Another reason is that the transformer is shot, or not set for the power line voltage you have. In any case, even if the voltage is 18V, just put a 1.2Kohm resistor in series with the LED so that you get 15mA current through it, and avoid burning it out.
@@ztechalmanac3194 thank you so much. Indeed I've been looking in the schematic and the actual wiring... and there was a modification I didn't know about. No wonder I was keep burning resistors. I changed everything as in the factory schematic and made the modifications for LED lights. Is a bit colored now as I didn't had enough LEDs to have white light as intended. I will replace them when doing the proper cleanup of the receiver as the condition is not so great so there will be a lot of cleaning to do inside. But for now it works and I can use it until I have the tine to properly take care of it. Thanks so much again. 73, YO6DXE. P.S. Really nice receiver. Glad I now have one so I can test homemade TX or TRX and listen into the receiver hehehe.
@@dxexplorer Glad you found out that the receiver was modified. It is the case with so many of these receivers. Thanks for sharing your call sign, I'll listen for you if your power is high enough to reach here.