Thank you for watching and taking the time to write a comment Ijah. I see, it does look like a bone. Thanks for letting me know what it is and what it was made for.
I think I might have picked that technique up from a UA-cam video. Thanks for all the kindness and interest you have shown on this channel. Loyal viewers like you grease the wheels and fan the flames.
I have switches with different diodrs- I think you are right they we're possibly attempting to do a similar mod using different diodes which is perfectly valid, but something went afoul obviously. There was a bungle in that jungle. Haha.
Yeah, I think someone knew just enough to be dangerous or they wanted whatever clippers where in there before real bad. Yeah a rotary switch wouldve been the ticket on that huh? maybe a good idea for a mod for a future vid???? I keep having people ask me about modding solid sate amps? I reckon I could swap transistors and opamps like tube rolling? Hahaha
@@rodblomley8517 Thank you so much Rod. I still have plenty to learn about electronics myself I learned a lot from PeteyTwoFinger. I had always tinkered with stuff since I was little and I've been playing guitar since I could walk but I ended up getting really into synthesizers making hip-hop music so I started to build a kinda modular synth thing from modules and guts out of stuff. Then when I moved into this house it had an old 70s bigscreen in the garage. I opened it up and saw all the wire and parts one could want. I then stayed up for about 3 days straight like a man possessed reading and learning about electronics and at the end I built a synth oscillator from the tv parts on a pine board. That was it... I now had the sickness the musical electronics building disease. Here we are now. LOL Thanks again. If you take baby steps and read enough and watch enough videos you can learn to do just about anything with all the info we have access to today. College is just pretty much for degrees to show to an employer at this point. you can learn a whole 4 years worth in a month now for free.
Looks almost like the Fender Frontman 15G Amplifier Schematic with very little Changes in any of their Solid-state Amplifiers . Would it be possible to just use all BA4560 Op Amps or similar instead of using the TL072 BJT Op Amps in the circuit?
Meant to say JFET Op Amps for the TL072 - Did not know if others would work since they do not have the JFET Input on them. The LM4562 - I have used in other amps and they work great for replacing bad 4548 Op Amps. Some of the Op Amps being Sold are said to be rebranded TL072 Op Amps and not an Upgrade at all.
Thank you for watching and taking the time to comment William. I am afraid I dont know enough about the individual opp amps personally to make a good recommendation on this myself. I do know that many say the sound of a Jfet is superior to the sound of a transistor so my own move would be to install sockets and just "audition" a few different ones. I have however been talking with my friend Petey TwoFinger in emails about the opp amps he uses in his homemade amplifiers. He is a big fan of the NE5532 chips and has said that all the full size ones on ebay now days are fakes but tayda has the real ones. He uses a meter to check the internals to see if it has a diode on legs 2-3 if not its fake. So he has started getting the little daughter boards and ordering smt chips like ad828 and putting them on the daughter boards and plugging that in. I haven't messed around with enough different opp amps myself to have much info or preference. Even if making a fuzz circuit or distortion pedal... I never really look at names I just plug in different transistors etc. till I get the sound I like. Kinda hack style but Petey has been building pedals and amps for years and he says the only really dirty sounding opp amps he has encountered would be the lm308 and the lm741. He says if you want to call it mojo thats up to you but those chips sound nasty. LOL
I modded my big muff by removing clipping diodes and I prefer it (also removed tone stack and a gain stage) I thought about doing the same no diode mod to a marshall AVT Valvestate because it loses volume on the higher gain channels and it has way more distortion than is usable anyway and it gets muddy and I use a tube screamer as a boost anyways for extra gain and tightness. I don't know if it'll work but I figured it's worth a shot and I can always just put the LEDs back or even put them a switch you can turn on and off
Thank you for watching and for taking the time to comment Estudios. Unfortunately I no longer have this amp but that can be done it should be as simple as wiring a guitar jack to the solder points on the switch and installing it on the back of the amp. I may try this on another small practice amp and post a video. I will put this in my notes and if/when I make a video with the idea I will give you a shout-out. Thanks again, Great Idea!
@@heavymetalATC it is a 6 pin switch.. i don't know how to wire the solder points to the jack.. it'll be great if you can make a video about that.. thanks!
I have the same amp from when I was little, and I played it too loud for too long and something popped and and thought I blew out the speaker. I recently found it in the trunk of my car and took a crack at fixing it. When I turned it on the clean channel had loud humming and even more so on the gain channel. The clean channel would not pick up the signal when I strummed but the gain channel did, but had loud intermittent crackling. I couldn't find much help online and found your video which was great for reference, on how to get the circuit board out. I noticed the input jack was loose and soldered it back in place. Now when I turn on the amp there is this motor boat sound. Maybe I screwed up when soldering. Any thoughts on what to check or look for? Nothing seems to be messed up on the circuit board, but there are some solder joint with a tiny bit of oxidation.
Thanks for watching and taking the time to leave a comment Adam. The first thing I would do is touch up any solder joints you feel may be suspicious and then use some alcohol to really scrub the bottom of the board to get all the conductive solder flux off of the circuit. the motorboat oscillation tells me you have a loop happening somehow. It may just be flux or it could be a grounding issue, bad chip or leaky transistor. If you have any further issues or questions feel free to drop a comment... thanks again and best of luck to you and kudos for not throwing it out. Even if that board cant be fixed you could always turn it into a tube amp or other project.
Thank you for watching and taking the time to write a kind comment Arthur. I have to admit I was rather surprised by the sound myself, one of the best sounding little solid state amps Ive heard. Makes me wonder if theirs some guy or young kid out there with one of these saying yeah... This amp is crap if I only had a tube amp id sound good. Yeah, um NO. This amp has Great tone.
Thank you so much for watching and taking the time to leave a kind comment Pajama Jams. Unfortunately I no longer have this amp. It can definitely be done you would have to look at the schematic and find the trace that goes to the power section and remove a resistor or cut it with a razor and run a lead from each side to a jack for in and out and use one of those jacks with a built in switch contact that would connect and disconnect a jumper wire between them. It would be quite the job but im sure it could be done.
Thanks for watching and taking the time to comment Josh. Yeah all the stuff with the BF tone stack sure does. I like it though classic sounding but I have since fallen in love with the tweed sound although I do use a preamp to kinda bend it back to BF.
Thank you so much for watching and taking the time to comment Ivan. Yes, I don't know exactly the reason, Id suspect it to be the type of chemical doping used to create different colors of light but I have found that All colors and sizes of LED create a slightly different sound and feel when used as a clipping diode. From what I learned from experiments building a pre-amp a few years back the green seemed to have a cleaner sound and would cut out or "velcro" less when dealing with low volumes or bias. Red was middle of the road from what I remember. I have a buddy that swears by the large ultra bright yellow ones. A 1N914 diode is very sputtery and fuzzy compared to any color LED in my past experience. If you have a breadboard or ever have a chance to take some alligator clips and pop a few different colors in and out of a circuit its definitely worth a try. Saying one is better than the others is subjective you may find that you personally like the sound of Pink or mini white as we all have different tastes, Ive never tried an infrared one from a remote. That might be a fun thing. Im going to put this in my notes and I might make a video plugging different LEDs into a breadboard circuit. If I do I'll give you a shoutout. In general though yes, green would be similar to blue but they would still sound slightly different in my own experience. I hope that helps Ivan. Have a great day and thank you for the interest and kind communication.
dudes on ludes should NOT mod their amplifiers . yeah its gonna sound moar analogz ... moar tyuub lyke.good job with the repair man. thats so cool when you can revive stuff like this. i got a fender amp that had 6 blown op amp chips . all the op amps where toast . like did it get hit with a surge ? i bought the amp for 10 dollars as it had a good 12 speaker in it . its a fender jam ? like the worst amp fender made but it has spring reverb and a few channels / different levels of dirt with a weird double push button array of switches . anyway on a whim i checked the voltage on the first op amp and i was like i fixed it < 5 more ics later ... lol . tl072 every one of em . so proud of myself . i fixed that amp and never used it . lol .
Yeah. My dad had this for a long time and I finally talked him into letting me try to fix it. I have no idea what the thought was that resulted in what happened to it but it was easy to undo. I do hate that I misspoke in the vid about blue clipping harder... It's the opposite. heard that right after uploading. Science? I bet that one you have took a ride on the lightning bolt express. Lol don't think I would have ever been able to figure that out. My hack mind would have said gut it put glass bottles in it and the old folks will think I'm cool. Haha thank for watching and for all the great communication.
Thank you Nuno This thing was found in the trash at the recycling center and given to my dad and he had it for years but I finally talked him into letting me crack it open and fix it. It actually sounds a lot better than I thought it would. I Also love it when a viewer hits me with a comedic comment it makes my day better. Thanks again
Minute 2:36 it's called a 'Knochen' (Deutsch) and in English that means 'Bone'. We use it for bikes.
Thank you for watching and taking the time to write a comment Ijah. I see, it does look like a bone. Thanks for letting me know what it is and what it was made for.
@@heavymetalATC @heavymetalATC Thank YOU o for your presence and cool Videos. Very good.
that knob removal tool was so Magyver....love it bro
I think I might have picked that technique up from a UA-cam video. Thanks for all the kindness and interest you have shown on this channel. Loyal viewers like you grease the wheels and fan the flames.
@@heavymetalATC all fun n games till the shit hits the fan. Live long and prosper my cyber friend.
I have switches with different diodrs- I think you are right they we're possibly attempting to do a similar mod using different diodes which is perfectly valid, but something went afoul obviously. There was a bungle in that jungle. Haha.
Yeah, I think someone knew just enough to be dangerous or they wanted whatever clippers where in there before real bad. Yeah a rotary switch wouldve been the ticket on that huh? maybe a good idea for a mod for a future vid???? I keep having people ask me about modding solid sate amps? I reckon I could swap transistors and opamps like tube rolling? Hahaha
Every vid I learn something! I dont understand everything as far as the lingo but you are a great teacher and I oove your pickin son!!!
Thats love your pickin'
@@rodblomley8517 Thank you so much Rod. I still have plenty to learn about electronics myself I learned a lot from PeteyTwoFinger. I had always tinkered with stuff since I was little and I've been playing guitar since I could walk but I ended up getting really into synthesizers making hip-hop music so I started to build a kinda modular synth thing from modules and guts out of stuff. Then when I moved into this house it had an old 70s bigscreen in the garage. I opened it up and saw all the wire and parts one could want. I then stayed up for about 3 days straight like a man possessed reading and learning about electronics and at the end I built a synth oscillator from the tv parts on a pine board. That was it... I now had the sickness the musical electronics building disease. Here we are now. LOL Thanks again. If you take baby steps and read enough and watch enough videos you can learn to do just about anything with all the info we have access to today. College is just pretty much for degrees to show to an employer at this point. you can learn a whole 4 years worth in a month now for free.
Looks almost like the Fender Frontman 15G Amplifier Schematic with very little Changes in any of their Solid-state Amplifiers . Would it be possible to just use all BA4560 Op Amps or similar instead of using the TL072 BJT Op Amps in the circuit?
Meant to say JFET Op Amps for the TL072 - Did not know if others would work since they do not have the JFET Input on them. The LM4562 - I have used in other amps and they work great for replacing bad 4548 Op Amps. Some of the Op Amps being Sold are said to be rebranded TL072 Op Amps and not an Upgrade at all.
Thank you for watching and taking the time to comment William. I am afraid I dont know enough about the individual opp amps personally to make a good recommendation on this myself. I do know that many say the sound of a Jfet is superior to the sound of a transistor so my own move would be to install sockets and just "audition" a few different ones. I have however been talking with my friend Petey TwoFinger in emails about the opp amps he uses in his homemade amplifiers. He is a big fan of the NE5532 chips and has said that all the full size ones on ebay now days are fakes but tayda has the real ones. He uses a meter to check the internals to see if it has a diode on legs 2-3 if not its fake. So he has started getting the little daughter boards and ordering smt chips like ad828 and putting them on the daughter boards and plugging that in. I haven't messed around with enough different opp amps myself to have much info or preference. Even if making a fuzz circuit or distortion pedal... I never really look at names I just plug in different transistors etc. till I get the sound I like. Kinda hack style but Petey has been building pedals and amps for years and he says the only really dirty sounding opp amps he has encountered would be the lm308 and the lm741. He says if you want to call it mojo thats up to you but those chips sound nasty. LOL
Thanks !! That was cool.
I modded my big muff by removing clipping diodes and I prefer it (also removed tone stack and a gain stage) I thought about doing the same no diode mod to a marshall AVT Valvestate because it loses volume on the higher gain channels and it has way more distortion than is usable anyway and it gets muddy and I use a tube screamer as a boost anyways for extra gain and tightness. I don't know if it'll work but I figured it's worth a shot and I can always just put the LEDs back or even put them a switch you can turn on and off
a mod to turn the drive channel switch into a footswitch plug would be great...
Thank you for watching and for taking the time to comment Estudios. Unfortunately I no longer have this amp but that can be done it should be as simple as wiring a guitar jack to the solder points on the switch and installing it on the back of the amp. I may try this on another small practice amp and post a video. I will put this in my notes and if/when I make a video with the idea I will give you a shout-out. Thanks again, Great Idea!
@@heavymetalATC it is a 6 pin switch.. i don't know how to wire the solder points to the jack.. it'll be great if you can make a video about that.. thanks!
@@EstudiosAQB ahh I see that may require relays or something? ill have to look into it.
I have the same amp from when I was little, and I played it too loud for too long and something popped and and thought I blew out the speaker. I recently found it in the trunk of my car and took a crack at fixing it. When I turned it on the clean channel had loud humming and even more so on the gain channel. The clean channel would not pick up the signal when I strummed but the gain channel did, but had loud intermittent crackling. I couldn't find much help online and found your video which was great for reference, on how to get the circuit board out. I noticed the input jack was loose and soldered it back in place. Now when I turn on the amp there is this motor boat sound. Maybe I screwed up when soldering. Any thoughts on what to check or look for? Nothing seems to be messed up on the circuit board, but there are some solder joint with a tiny bit of oxidation.
Thanks for watching and taking the time to leave a comment Adam. The first thing I would do is touch up any solder joints you feel may be suspicious and then use some alcohol to really scrub the bottom of the board to get all the conductive solder flux off of the circuit. the motorboat oscillation tells me you have a loop happening somehow. It may just be flux or it could be a grounding issue, bad chip or leaky transistor. If you have any further issues or questions feel free to drop a comment... thanks again and best of luck to you and kudos for not throwing it out. Even if that board cant be fixed you could always turn it into a tube amp or other project.
Sounds dam good.
Thank you for watching and taking the time to write a kind comment Arthur. I have to admit I was rather surprised by the sound myself, one of the best sounding little solid state amps Ive heard. Makes me wonder if theirs some guy or young kid out there with one of these saying yeah... This amp is crap if I only had a tube amp id sound good. Yeah, um NO. This amp has Great tone.
You seem to know your stuff. Can you install an effects loop between the preamp and power amp of the drive channel?
Thank you so much for watching and taking the time to leave a kind comment Pajama Jams. Unfortunately I no longer have this amp. It can definitely be done you would have to look at the schematic and find the trace that goes to the power section and remove a resistor or cut it with a razor and run a lead from each side to a jack for in and out and use one of those jacks with a built in switch contact that would connect and disconnect a jumper wire between them. It would be quite the job but im sure it could be done.
fender's sound tinny, no matter how big.. but true to the guitar sound
Thanks for watching and taking the time to comment Josh. Yeah all the stuff with the BF tone stack sure does. I like it though classic sounding but I have since fallen in love with the tweed sound although I do use a preamp to kinda bend it back to BF.
I see the Blue and Green LEDs have the same voltage reading on your box. Is there any difference in the two gain or tone wise?
Thank you so much for watching and taking the time to comment Ivan. Yes, I don't know exactly the reason, Id suspect it to be the type of chemical doping used to create different colors of light but I have found that All colors and sizes of LED create a slightly different sound and feel when used as a clipping diode. From what I learned from experiments building a pre-amp a few years back the green seemed to have a cleaner sound and would cut out or "velcro" less when dealing with low volumes or bias. Red was middle of the road from what I remember. I have a buddy that swears by the large ultra bright yellow ones. A 1N914 diode is very sputtery and fuzzy compared to any color LED in my past experience. If you have a breadboard or ever have a chance to take some alligator clips and pop a few different colors in and out of a circuit its definitely worth a try. Saying one is better than the others is subjective you may find that you personally like the sound of Pink or mini white as we all have different tastes, Ive never tried an infrared one from a remote. That might be a fun thing. Im going to put this in my notes and I might make a video plugging different LEDs into a breadboard circuit. If I do I'll give you a shoutout. In general though yes, green would be similar to blue but they would still sound slightly different in my own experience. I hope that helps Ivan. Have a great day and thank you for the interest and kind communication.
@@heavymetalATC Just saw a video comparing diodes and the BAT43 was ripping. Just ordered a 50 pack for $7! Thanks for all the info.
@@RasCuban33 Absolutely Ivan. That's awesome Rock on bro!
dudes on ludes should NOT mod their amplifiers . yeah its gonna sound moar analogz ... moar tyuub lyke.good job with the repair man. thats so cool when you can revive stuff like this. i got a fender amp that had 6 blown op amp chips . all the op amps where toast . like did it get hit with a surge ? i bought the amp for 10 dollars as it had a good 12 speaker in it . its a fender jam ? like the worst amp fender made but it has spring reverb and a few channels / different levels of dirt with a weird double push button array of switches . anyway on a whim i checked the voltage on the first op amp and i was like i fixed it < 5 more ics later ... lol . tl072 every one of em . so proud of myself . i fixed that amp and never used it . lol .
Yeah. My dad had this for a long time and I finally talked him into letting me try to fix it. I have no idea what the thought was that resulted in what happened to it but it was easy to undo. I do hate that I misspoke in the vid about blue clipping harder... It's the opposite. heard that right after uploading. Science? I bet that one you have took a ride on the lightning bolt express. Lol don't think I would have ever been able to figure that out. My hack mind would have said gut it put glass bottles in it and the old folks will think I'm cool. Haha thank for watching and for all the great communication.
Yes sounds like shit again. Just kidding man, nice work :)
Thank you Nuno This thing was found in the trash at the recycling center and given to my dad and he had it for years but I finally talked him into letting me crack it open and fix it. It actually sounds a lot better than I thought it would. I Also love it when a viewer hits me with a comedic comment it makes my day better. Thanks again
Gated fuzz
pretty much but dear lord was it loud. I dont know how that tiny speaker could hurt me so bad.