Forgot to mention... Marshall and Fender schematics used in this video came from the Tube Amp Book. I have an early edition, but the later editions are nicer. Good book to own for most common schematics: amzn.to/2DYyFv0
Omg! I'm addicted to your videos bro! I'm truly grateful for your channel during this Covid-19 lockdown. I'm also seriously considering taking some electronic repair courses online at 52 years of age. You're never too old to learn something new....
Yes, Mr. Guitalogist you have created Marshall/Fender Monster Amp and your wife signed and confirmed it at 1am. in the morning. Great job love your video.
Hey man! Just wanted to congratulate you on your channel! It is truly a very informative and super interesting channel to watch! I'm a guitar player myself and an electronic engineering minor, so I find your videos super cool, and can't stop watching them. I also love the way you go about "troubleshooting" these pieces of equipment, very logical, no non-sense and to the point, with some great electronic tips and tricks to go along with it! Thank you so much and keep doing what you do!
Wow Brad that PA turned out great! I usually just gut the entire pre-amp, and then copy an existing design of an amp I know I like. You took what was there and made changes until it sounded like you wanted, a much more daunting challenge. Bravo, well done Take care, Tom
To my ears, this amp sounds as good as any i've ever heard (for the type of tone amp i like to play through). Killer tone. Nice noodling to.. good pickin' and good finger tone.
Nothing says "skill" like this video. Truly impressive when you can design a circuit that predicts tones when "improvising" like you were. I only wish I could do some like that. The interaction with the family solidifies my opinion of you as an individual. Keep on doing what so few can do!
Wow, what a beautiful, spotlessly clean chassis underneath; looks fresh from the factory floor! I love beautiful, clean design, especially on tube equipment!
Ok... This video was awesome! Thanks for the detailed look at what you were doing and WHY. I'm not an amp repair dude, but I've got a list of stuff I want to try. This type of thing is def on my list.
Nice work! It has a nice break-up. I like it a lot. I added a 12AX7 to a valve jr. Head and cloned a 2203 gain stages, cathode follower tone circuit, global NFB & presence. Wish I had room left on the panel for more options to incorporate the bassman sound. Thanks for the video man, I enjoyed it and as always I learned new information as well.
DAMN, that sounds good!!! I remember ordering Lafayette catalogs when i was a kid, pretty much when this amp was made. Never seen anything in person since then. Freakin' lucky so and so who got this and found you to Fire It Up!!
You always pull off crazy shit... like not using that Bertha iron for the chassis soldering. Just knowing that the shop speaker is laying down on a stool. Terrific playing as always inspired by Hoegaarden 40:53 Greeting from Hoegaarden in Belgium!
Ahhh I can relate. Your wife and mine are definitely related... at least in attitude towards late night / early mornin rockin. Great conversion. Killer tones. Love it.
Awoke this morning to ANOTHER demonetized video. They are doing it to every single one now. And they're throttling them as well. I can see the stats where they only do x suggested videos per hour, and it's capped like a plateau. I hate TH-cam more and more each day. They are about to break me, I hate to say.
The Guitologist again?? They are obviusly trying to silence people like you, maybe because its in modern day interest to buy things and when it stop working then it is thrown to garbage instead of fixed, maybe because they want mean to you after you made a video about shitty mercury & cadmium bulbs (that have poison inside and slowly brainwash people and weak their health so that WHO could do shit to us and sell us "medicine" that makes you stupid. It all looks nice when they write things about helping world in media, but when you scratch the surface, you start seeing bad things, and when you get whats going on, there it goes: demonetization, lawsuits, and after that "scilencing" (wiping you from the surface of earth just like they did with Frank Zappa, poisoned him until he died from cancer...) But we must not fail, we must be responsible for a lot of global things... If you are interested go check out RichieFromBoston, he has some theories...
The Guitologist all tin foil hats aside, I think youtube throttles anyone their algorithms deem as not forwarding a liberal mindset. They’re also afraid someone may pick up a useful skill. We can’t have people actually using their brain for something other than watching fucking Kim Kardashian.
I am not going to pretend to understand how all this works with you tube but wanted to ask if they ever let you know why they demonetize? I have considered doing videos similar to yours but not sure if it is worth it at this point with you tube jacking with everyone.
There were several parts of this one I didn't quite understand Brad but this was really outstanding and I'd love to have one. I just can't believe the sounds you are able to get out of this but like I said, you got into some repair areas I don't remember you talking about before but I've picked up some books and picking up a lot. Really enjoyed this video and the final sounds of the amplifier. Amazing what you can do with a 60's PA head! (That was cute with your daughter at the end of the video)
No thank you! Meant to tell you, I got the "Designing Tube Preamps for Guitar and Bass book by Blencowe" and I have the "Tube Amp Book by Pittman" the most recent coming, should be here Monday. I've picked up a lot already, the books are great and you are a pretty good teacher too. Thanks. You Rock!
My father just built 3 of these and I'm currently testing an older model 645A and it's the dog's balls. Just a fantastic, organic, warm and round tone. Loves pedals. Running through an older 80's slant front 2x12 Marshall cab (from the Mosfet days) with 35 watt Celestions and I'm LOVING it!! Lightweight and loud. Great gigging amp.
@@TheGuitologist Actually no. I just shared this with him today (he doesn't get on TH-cam much). The amps were already "gone through". He has been building amps for awhile. He really enjoyed your video though and he may be doing your mods to the other 645A he has. This is the first set of old PA heads he's modded to be used for guitar though which is why I searched Lafyette amps and came across your video! He has two 645's and a larger 70 watt (I think) that he's working on now.
I’d forgotten how far out of the fingerboard the trussrod extended on those Roadstar II’s. Looks like about an ‘85 to me. My first electric was a RS-II ‘84 strat copy bought and paid for with my first cheque from my first job ($280 CAN)... :) 46 Guitars later and I’m still a huge Ibanez guy... :) Great Vid!!
The Bogen chb35a I've had about 15 years converted to guitar 🎸 amp, really sounds great with the 7868 tubes, really clean tone until about 6 or 7, I've been subscribed for years to your channel 👌👏👍, keep on rocking 🔊😀🎸
My 1kW Variac came in a plane white factory box which was padded with styrofoam but was apparently dropped on one corner, and the extra fuse rattling around in the bottom. With the weight of the thing I was lucky that it survived.
Where did you find that banner Brad ? That’s so cool, RCA all the way. If that doesn’t get a thumbs up nothing will. Great video Brad keep them coming.
The Treble Bass Middle layout isn't unheard of, it's that way on the best guitar amp ever made! The 1986 actually has half the bias resistor and twice the bias resistor of a 5F6 input stage. Either way it's more gain for certain frequencies. The mishmash Fender/Marshall amps I've built have been the favorite amps of their owners. The 6V6 15 to 20 watt type have been very popular in SoCal. I can't take credit for the 6V6 2204, Doug Hoffman has a great design on his website that kills! There's a few of mine down here you might hear in Hollywood venues ; )
I'm subbed since quite some time now. I barely understand what you do with your amps but I love it. Can't wait to see you making more experiments with the Nutube.
Brad - this was reckon brilliant... I'm pretty sure you didn't want to send this back to the customer ;-) Sounded fantastic ... I need to go bargain hunting for some old PA amps for conversion... Keep up the great work and I hope TH-cam stops demonizing, er. I mean demonetizing your videos :-( :-( !!!
All the old Bogen Challenger (well, the really old ones, BEFORE they started making solid state models and calling them "Challenger") amps are almost plug & play for guitar. Well, not almost, you CAN use them exactly as they are and get great dirty guitar tones, but it helps to at least change the grid resistors and maybe swap coupling caps if you're gonna use it for guitar. But yeah, Bogen made better Marshalls than Marshall.
Sounds awesome Brad!! I like the re-purposing amp videos you do.. I like the idea period of odd ball looking pedals and amps.. Looks like a P.A. roars like a Marshall !! Going to a gig and plugging into something that looks like VCR but sounds beastly the looks you get is PRICELESS!! Lol .. I've used some odd ball looking pedals before at a gig and as soon as i kicked the pedal in afterwards i get asked what was that..??
I'm pretty sure that chassis and output tube slanted socket area are aluminum. The leads that were soldered (for the first time) are touching the chassis but solder will not stick to aluminum so may need to tie those to the chassis with a bolt or run a wire...
hey man, i reallllly loved that playing you were doing around 41:15 or so. very flamenco sounding. could you say where you got that vibe of playing from? i'd love to hear more of it and to know what other artists to check out like that. cheers and mad love for your channel.
Thanks dude. TBH, I don't know. I used to listen to a lot of classical and flamenco guitar. Carlos Montoya, Manitas de Plata are two whose records I own. Of course anything by Fernando Sor, Carcassi, or Albiniz will get you that Spanish vibe. Happy listening!
I Have a '60s Lafayette Stereo Speaker w/ a 10 " Norelco Oval-Shaped Speaker that Really ROCKS !!.......Lots of BOTTOM !! Also Have a Lafayette "MONSTER" Stereo ( Quad ?) Amplifier w/ 5 Fuse Holders / 2 Aux /2Phono / 2 Tape / 8 Speaker Outputs..........I Can't Get to the Front to See Model #...........HOARD Prevents That @ This Time.........Front & Rear/ Ceramic & Magnetic Phono Hookups........Dammit !! I'll Be Digging This Out Tomorrow..........Got My Curiosity Aroused !!!!!!! Hopefully It Functions Completely ?? Love the Channel Brad ......... GREAT JOB !!!!
I would clean out the solder splodge / drip you made + clean off the solder flash that is sitting on the wire below your soldering. before switching anything on.
I liked the fender sound nice playing btw. my 2nd guitar was Ibanez Roadster it wasn't as nice as yours tho. great job on the amp I don't what you did to the dirty chn but wow you will have a happy customer.
Absolutely wonderful work man.. sounds very tasty. Sigh. Please move to Canada on vancouver island so I can get you to work on my boutique collection. Thanks :")
Hey Brad. As a recent subscriber to your channel I can't speak to the goings-on with airing broadcasts but I really do enjoy the time,effort, and work you put into your videos. I mean I know nothing about electronics or amp repair and mods but I'm fascinated none the less. I enjoy your playing too. Don't be discouraged my friend. Press on. You were called to do this. Also,do you sell any of your creations and if so,where can I check them out? Thanks.
Thanks for the encouragement, Phillip. I sell on Reverb.com and also on Craigslist. Or I'll sell direct to you through TH-cam using PayPal if you see something of mine you want.
I just noticed your RCA tube wall hanging I want it or not it but one like it I know tech look but you just that in major changes that if you don’t play you can’t understand any of the small pa amps can be a great guitar amp if you know with way to go !
Another awesome video Brad! Can I ask what sort of power the amp is putting out an could you state this for future vids as been trying to figure out what some of these vintage pa or radio amps put out compared to say a 30 watt dedicated guitar amp...... you seem to be able to run the master high in this video so guessing it will be less than 20 watts? Many thanks for the vids, keep up the good work.
Brad, I know. I've been watching you for a while. I'm the smartass who said your wife sounded like she runs EL34s in the Jag video you did a million years ago.
The '70' and '25' lugs on the terminal strip are for 70 and 25 volt, respectively, distributed audio, commonly used in institutional and industrial applications...along with some churches on a budget. The output of the power amp is tied to an autotransformer, then each speaker has a corresponding transformer, with taps labeled 1/2-watt, 1-watt, etc. In theory, therefore, such an amp, if rated, for instance, at 100 watts, could handle 200 transformer-isolated speakers, tapped at 1/2-watt (although, in practice, you never loaded an amp to more than 80% capacity). The jumper tied to the 4-ohm lug was often set up that way to enable the 25-volt output of the autotransformer. Disconnecting it would allow you to connect a 4-ohm load, or use the 70-volt output. The fact that it was connected probably means that the amp was being used either as part of a school intercom system or the page circuit of a fire alarm system, bot of which typically used the 25-volt circuit...that allowed connection of 8 times as many speakers. The entire science is WAY too long to post here!! This is the stuff i worked with (along with 'Pro' audio, and a number of other low-voltage systems, for over 40 years...including stints with NSCA and Lincoln Tech, as an instructor.
BTW, the autotransformer output's downside is that it is very strong in midrange (primarily designed for spoken word, and maybe a little low-fi background music), but weak in highs and lows, making it a very 'so-so' guitar amp, at best.
Forgot to mention... Marshall and Fender schematics used in this video came from the Tube Amp Book. I have an early edition, but the later editions are nicer. Good book to own for most common schematics: amzn.to/2DYyFv0
The original 50W fender amp schematic can be found in a 195x RCA tube reference guide . Ping me - I'll share a copy
Omg! I'm addicted to your videos bro! I'm truly grateful for your channel during this Covid-19 lockdown. I'm also seriously considering taking some electronic repair courses online at 52 years of age. You're never too old to learn something new....
Yes, Mr. Guitalogist you have created Marshall/Fender Monster Amp and your wife signed and confirmed it at 1am. in the morning. Great job love your video.
Hey man! Just wanted to congratulate you on your channel! It is truly a very informative and super interesting channel to watch! I'm a guitar player myself and an electronic engineering minor, so I find your videos super cool, and can't stop watching them. I also love the way you go about "troubleshooting" these pieces of equipment, very logical, no non-sense and to the point, with some great electronic tips and tricks to go along with it! Thank you so much and keep doing what you do!
Nice Roadstar II and great video, as always.
Those era Ibanez guitars will always be worth every cent anybody paid for them.
Wow Brad that PA turned out great! I usually just gut the entire pre-amp, and then copy an existing design of an amp I know I like. You took what was there and made changes until it sounded like you wanted, a much more daunting challenge. Bravo, well done Take care, Tom
The trial and error is the fun part.
Wow your final result is amazing! It sounded choked at the first stage but you really opened it up to breath. Nice!
To my ears, this amp sounds as good as any i've ever heard (for the type of tone amp i like to play through). Killer tone. Nice noodling to.. good pickin' and good finger tone.
That thing sounds amazing! you did as such a fantastic job it's inspirational thanks for helping us all learn how to do these things
Nothing says "skill" like this video.
Truly impressive when you can design a circuit that predicts tones when "improvising" like you were.
I only wish I could do some like that.
The interaction with the family solidifies my opinion of you as an individual.
Keep on doing what so few can do!
Awesome video Brad, I always love the long videos. I can sink my teeth into it, and enjoy the process. Cheers.
very nice ! A very succesful reassignment surgery Doc. you made the amp sound really good, and possibly solved the problem I have with my amp.
Lafayette Electronics - a blast from the past!
Big fan of your videos man. You always do great work.
Just about everything you touch comes up ROCKING!
Yes you nailed it again Brad, just awesome 👍
I love it when ppl scratch the arrows around the knobs so everyone will know where to set the knobs.
They'll all be wrong now. And I think it's just pencil.
Wow, what a beautiful, spotlessly clean chassis underneath; looks fresh from the factory floor! I love beautiful, clean design, especially on tube equipment!
Yeah, this thing obviously sat in one spot for a long time.
I have redone 4 of these and they do rock the house, they make awesome rocking amps with minimal work , keep building, love been hooked for years
Super Vid..!! Great modifications to the Lafayette...kind of Sounds like my 1963 Bassman
Ok... This video was awesome! Thanks for the detailed look at what you were doing and WHY. I'm not an amp repair dude, but I've got a list of stuff I want to try. This type of thing is def on my list.
Nice work! It has a nice break-up. I like it a lot. I added a 12AX7 to a valve jr. Head and cloned a 2203 gain stages, cathode follower tone circuit, global NFB & presence. Wish I had room left on the panel for more options to incorporate the bassman sound. Thanks for the video man, I enjoyed it and as always I learned new information as well.
DAMN, that sounds good!!! I remember ordering Lafayette catalogs when i was a kid, pretty much when this amp was made.
Never seen anything in person since then. Freakin' lucky so and so who got this and found you to Fire It Up!!
I'll sell it to you.
You always pull off crazy shit... like not using that Bertha iron for the chassis soldering. Just knowing that the shop speaker is laying down on a stool. Terrific playing as always inspired by Hoegaarden
40:53 Greeting from Hoegaarden in Belgium!
Fantastic video mate. A great conversion. Love the playing too!
Thanks man.
Ahhh I can relate.
Your wife and mine are definitely related... at least in attitude towards late night / early mornin rockin.
Great conversion. Killer tones. Love it.
Awoke this morning to ANOTHER demonetized video. They are doing it to every single one now. And they're throttling them as well. I can see the stats where they only do x suggested videos per hour, and it's capped like a plateau. I hate TH-cam more and more each day. They are about to break me, I hate to say.
The Guitologist again?? They are obviusly trying to silence people like you, maybe because its in modern day interest to buy things and when it stop working then it is thrown to garbage instead of fixed, maybe because they want mean to you after you made a video about shitty mercury & cadmium bulbs (that have poison inside and slowly brainwash people and weak their health so that WHO could do shit to us and sell us "medicine" that makes you stupid. It all looks nice when they write things about helping world in media, but when you scratch the surface, you start seeing bad things, and when you get whats going on, there it goes: demonetization, lawsuits, and after that "scilencing" (wiping you from the surface of earth just like they did with Frank Zappa, poisoned him until he died from cancer...) But we must not fail, we must be responsible for a lot of global things... If you are interested go check out RichieFromBoston, he has some theories...
The Guitologist all tin foil hats aside, I think youtube throttles anyone their algorithms deem as not forwarding a liberal mindset. They’re also afraid someone may pick up a useful skill. We can’t have people actually using their brain for something other than watching fucking Kim Kardashian.
Hey Brad, you might want to have a look at this as a possible alternative th-cam.com/video/7qmcwJ7hotI/w-d-xo.html
YT are cheap and greedy bunts as far as I can tell. Fake agendas, no vision.
I am not going to pretend to understand how all this works with you tube but wanted to ask if they ever let you know why they demonetize? I have considered doing videos similar to yours but not sure if it is worth it at this point with you tube jacking with everyone.
There were several parts of this one I didn't quite understand Brad but this was really outstanding and I'd love to have one. I just can't believe the sounds you are able to get out of this but like I said, you got into some repair areas I don't remember you talking about before but I've picked up some books and picking up a lot. Really enjoyed this video and the final sounds of the amplifier. Amazing what you can do with a 60's PA head! (That was cute with your daughter at the end of the video)
Thanks buddy
No thank you! Meant to tell you, I got the "Designing Tube Preamps for Guitar and Bass book by Blencowe" and I have the "Tube Amp Book by Pittman" the most recent coming, should be here Monday. I've picked up a lot already, the books are great and you are a pretty good teacher too. Thanks. You Rock!
Your a real badass on that guitar bud! Great video and even better picking!
Dig the 'Initech' mug...nice work on the amp too!!
nice 1 a.m. repair! superb work!
It's the only time I can get away from the fam and have quiet time to think.
thanks,that is one heck of a do all amp mod,sound great here.!
Man you pulled all the eggs out on this one my friend. Nice job Brad.
Thank you Carl. Good to see you.
My father just built 3 of these and I'm currently testing an older model 645A and it's the dog's balls. Just a fantastic, organic, warm and round tone. Loves pedals. Running through an older 80's slant front 2x12 Marshall cab (from the Mosfet days) with 35 watt Celestions and I'm LOVING it!! Lightweight and loud. Great gigging amp.
Did he follow my mods?
@@TheGuitologist Actually no. I just shared this with him today (he doesn't get on TH-cam much). The amps were already "gone through". He has been building amps for awhile. He really enjoyed your video though and he may be doing your mods to the other 645A he has. This is the first set of old PA heads he's modded to be used for guitar though which is why I searched Lafyette amps and came across your video! He has two 645's and a larger 70 watt (I think) that he's working on now.
I’d forgotten how far out of the fingerboard the trussrod extended on those Roadstar II’s. Looks like about an ‘85 to me. My first electric was a RS-II ‘84 strat copy bought and paid for with my first cheque from my first job ($280 CAN)... :) 46 Guitars later and I’m still a huge Ibanez guy... :) Great Vid!!
I loved Lafayette stores and the equipment was really good. I grew up in Canada and they did not sell it there.
Awesome job Brad !!! Sounds Great !!
The Bogen chb35a I've had about 15 years converted to guitar 🎸 amp, really sounds great with the 7868 tubes, really clean tone until about 6 or 7, I've been subscribed for years to your channel 👌👏👍, keep on rocking 🔊😀🎸
Your hammering technique is to die for!!! Vids please!!
The amp sounds terrific, some people just have it don't they
I hear a lot of Leslie West in your playing this amp sounds amazing !!!!
Another great sounding amp Brad!
It turned out sounding great. awesome job. Really nice little amp.
I thought so too. Turned out pretty ok.
My 1kW Variac came in a plane white factory box which was padded with styrofoam but was apparently dropped on one corner, and the extra fuse rattling around in the bottom. With the weight of the thing I was lucky that it survived.
1 AM? You, Brad, are one hard working dude.
Where did you find that banner Brad ? That’s so cool, RCA all the way. If that doesn’t get a thumbs up nothing will. Great video Brad keep them coming.
Got that on eBay. I like it too. And it wasn't very much money.
The Treble Bass Middle layout isn't unheard of, it's that way on the best guitar amp ever made! The 1986 actually has half the bias resistor and twice the bias resistor of a 5F6 input stage. Either way it's more gain for certain frequencies. The mishmash Fender/Marshall amps I've built have been the favorite amps of their owners. The 6V6 15 to 20 watt type have been very popular in SoCal. I can't take credit for the 6V6 2204, Doug Hoffman has a great design on his website that kills! There's a few of mine down here you might hear in Hollywood venues ; )
Cool amp NOW. GREAT JOB like always, Alfred NYC/PR
Haha, love the title. great video as always brad.
Thanks, man.
Nice video. This gives a new meaning to the "la - Mar" conversion, and it's even a little bit Fendericky.
Superb job on that one....and superb playing too. Jeez!
Thanks, Sacco. I appreciate you watching. Subscribe if you haven't already, and join the crazy train!
I'm subbed since quite some time now. I barely understand what you do with your amps but I love it.
Can't wait to see you making more experiments with the Nutube.
I am winding up on rehabilitating a Stroboconn... the most accurate tuning system in history. Old stuff is fun to tinker with.
Cool man. Mine works great already. Got it cheap from a local picker friend.
The old Weller/Ungar screw-in heater irons work very well for chassis soldering.
Nice work, and awesome RCA banner.
That turned out great. What a versatile amp.
The best part for me was seeing your smile when you saw your daughter.
LOVE the RCA banner. !
Thanks for keeping me entertained while I deal with the flu!
Well done.
This amp + rv3 + tube screamer + 4x12 with v30s = yaaaaay!!
That aux fade is pretty cool, never seen that before
You're fearless. I'm not talking about the amp, I'm talking about laughing at the awakened woman. 😎
Highway to the Danger Zone, my friend. It's the only place a Maverick like me lives.
that was comedy..thx
Brad - this was reckon brilliant... I'm pretty sure you didn't want to send this back to the customer ;-) Sounded fantastic ... I need to go bargain hunting for some old PA amps for conversion... Keep up the great work and I hope TH-cam stops demonizing, er. I mean demonetizing your videos :-( :-( !!!
Brad you are Da Man! Great video.
Thanks, Rick.
I had a Bogen for an amp as a teenager. The look and name of this amp makes it very cool cosmetically.
All the old Bogen Challenger (well, the really old ones, BEFORE they started making solid state models and calling them "Challenger") amps are almost plug & play for guitar. Well, not almost, you CAN use them exactly as they are and get great dirty guitar tones, but it helps to at least change the grid resistors and maybe swap coupling caps if you're gonna use it for guitar. But yeah, Bogen made better Marshalls than Marshall.
Sounds awesome Brad!! I like the re-purposing amp videos you do.. I like the idea period of odd ball looking pedals and amps.. Looks like a P.A. roars like a Marshall !! Going to a gig and plugging into something that looks like VCR but sounds beastly the looks you get is PRICELESS!! Lol .. I've used some odd ball looking pedals before at a gig and as soon as i kicked the pedal in afterwards i get asked what was that..??
Anyone can walk into Guitar Center and buy a Chinese, mass-produced amp these days, but something like this will last a lifetime and turn heads.
Well done, nice conversion. Sounds good.
Thanks, Dave.
Brad, Uncle Doug is back!
We had a Lafayette store in North Olmsted, Ohio, in the '70s-spent a lot of time and money there-lol!
Freaking awesome. Great vid and sounds great
OMG you got a KORG NUTUBE DIDN'T YOU? excited for the video!
I'm pretty sure that chassis and output tube slanted socket area are aluminum. The leads that were soldered (for the first time) are touching the chassis but solder will not stick to aluminum so may need to tie those to the chassis with a bolt or run a wire...
Good thinking, but no, it's steel. It took the solder fine. The solder will just bead off aluminum.
hey man, i reallllly loved that playing you were doing around 41:15 or so. very flamenco sounding. could you say where you got that vibe of playing from? i'd love to hear more of it and to know what other artists to check out like that. cheers and mad love for your channel.
PS: hoegaarden rocks.
Thanks dude. TBH, I don't know. I used to listen to a lot of classical and flamenco guitar. Carlos Montoya, Manitas de Plata are two whose records I own. Of course anything by Fernando Sor, Carcassi, or Albiniz will get you that Spanish vibe. Happy listening!
After seeing what you done to this PA, makes me want to experiment with my Montgomery ward airline tube amp
Excellent Conversion good sir!
I still love you! And learn a lot. Thanks
Nice mod. Like them old amps back in the day they sold as kits you could build and learn electronics
Love your vids Brad.
Hello from Hazard Ky, Brad! Really enjoy your content.
I Have a '60s Lafayette Stereo Speaker w/ a 10 " Norelco Oval-Shaped Speaker that Really ROCKS !!.......Lots of BOTTOM !! Also Have a Lafayette "MONSTER" Stereo ( Quad ?) Amplifier w/ 5 Fuse Holders / 2 Aux /2Phono / 2 Tape / 8 Speaker Outputs..........I Can't Get to the Front to See Model #...........HOARD Prevents That @ This Time.........Front & Rear/ Ceramic & Magnetic Phono Hookups........Dammit !! I'll Be Digging This Out Tomorrow..........Got My Curiosity Aroused !!!!!!! Hopefully It Functions Completely ?? Love the Channel Brad ......... GREAT JOB !!!!
Dig for your life!
I would clean out the solder splodge / drip you made + clean off the solder flash that is sitting on the wire below your soldering. before switching anything on.
Nice work turned out great !!
I liked the fender sound nice playing btw. my 2nd guitar was Ibanez Roadster it wasn't as nice as yours tho. great job on the amp I don't what you did to the dirty chn but wow you will have a happy customer.
I hope so. On conversions you never can tell, because it's such a matter of using what's there to come up with something rather than straight cloning.
Sounds pretty good, i would also add a tremolo, perhaps you could even do a harmonic one.
DUDE! A Roadstar II. Love it.
Hard to beat. Thanks Sir.
Killer conversion !
Sounds better than a lot of Marshalls I've heard!
Absolutely wonderful work man.. sounds very tasty. Sigh. Please move to Canada on vancouver island so I can get you to work on my boutique collection. Thanks :")
Hey Brad. As a recent subscriber to your channel I can't speak to the goings-on with airing broadcasts but I really do enjoy the time,effort, and work you put into your videos. I mean I know nothing about electronics or amp repair and mods but I'm fascinated none the less. I enjoy your playing too. Don't be discouraged my friend. Press on. You were called to do this. Also,do you sell any of your creations and if so,where can I check them out? Thanks.
Thanks for the encouragement, Phillip. I sell on Reverb.com and also on Craigslist. Or I'll sell direct to you through TH-cam using PayPal if you see something of mine you want.
i donno if i'm drunk or the marshal sound had more depth... but i know what i see. top job fella.
That packing job was overkill....but much better than receiving broken up stuff.
Yeah, the double boxing was overkill probably. Added about $25 to the shipping cost, I'd imagine.
I just noticed your RCA tube wall hanging I want it or not it but one like it I know tech look but you just that in major changes that if you don’t play you can’t understand any of the small pa amps can be a great guitar amp if you know with way to go !
it reminds me of a Bogen PA amp. only up to 4:48 of this vid.
Good job sounds great .
great work again! Question; what's with the blackened wires coming out of the output
transformer, at one point I thought that was the problem?
I forgot how nice those Ibanez Roadstars were minus the headstock LOL
Another awesome video Brad! Can I ask what sort of power the amp is putting out an could you state this for future vids as been trying to figure out what some of these vintage pa or radio amps put out compared to say a 30 watt dedicated guitar amp...... you seem to be able to run the master high in this video so guessing it will be less than 20 watts? Many thanks for the vids, keep up the good work.
I think your wife has a negative feedback issue.
I've been puzzling over it for a long time. Rational troubleshooting steps get thwarted every time.
That turned out well, it sounds pretty good.
The Guitologist, In reference to time at 37:50, you made a Lafayendershall. haha
Marshaphrodite
You've got quite a collection of quirky 60s/70s Japanese guitars. Nice
Lots more you can't see too.
Brad, I know. I've been watching you for a while. I'm the smartass who said your wife sounded like she runs EL34s in the Jag video you did a million years ago.
You should do some more Japanese guitar videos, love to see those things go from junk to decent players.
The '70' and '25' lugs on the terminal strip are for 70 and 25 volt, respectively, distributed audio, commonly used in institutional and industrial applications...along with some churches on a budget. The output of the power amp is tied to an autotransformer, then each speaker has a corresponding transformer, with taps labeled 1/2-watt, 1-watt, etc. In theory, therefore, such an amp, if rated, for instance, at 100 watts, could handle 200 transformer-isolated speakers, tapped at 1/2-watt (although, in practice, you never loaded an amp to more than 80% capacity). The jumper tied to the 4-ohm lug was often set up that way to enable the 25-volt output of the autotransformer. Disconnecting it would allow you to connect a 4-ohm load, or use the 70-volt output. The fact that it was connected probably means that the amp was being used either as part of a school intercom system or the page circuit of a fire alarm system, bot of which typically used the 25-volt circuit...that allowed connection of 8 times as many speakers. The entire science is WAY too long to post here!! This is the stuff i worked with (along with 'Pro' audio, and a number of other low-voltage systems, for over 40 years...including stints with NSCA and Lincoln Tech, as an instructor.
BTW, the autotransformer output's downside is that it is very strong in midrange (primarily designed for spoken word, and maybe a little low-fi background music), but weak in highs and lows, making it a very 'so-so' guitar amp, at best.