I know this one is a couple months old, but I have been watching all 8 parts today as I work. I really appreciate that you take us along on these with you. I even enjoy the hour long videos! I always wondered to myself about the cloth insulated wires, but never knew the cloth could become conductive, or that the wires could become microphonic like you showed. I am a mere hobbyist but I love the learning and I thank you Lyle
Really enjoy your videos sir.. thankyou for what you do.. It just occurred to me that, Im the kinda guy that watches electrical engineering videos for relaxation. Lol. Yes.. i did watch all 8.. I truly appreciate your attention to detail.. I had wondered for a moment or two, until you mentioned it.. "Why didnt you just change out the yellow and bkue wires for new insulated, instead of cleaning??" You addressed it verbally.. as if on cue.. Its the effort to retain as much original equipment and components as possible, in such a rare vintage amplifier... I completely understand now. Subsequently.. I being born 7ish years after this amp left the bench as brand new.. Played with an idea, that I want to run by you simply for intertainment purposes.. Setting ALL collector value and vintage retention values asside for the moment. Could an engineer retrofit modern PCB and components into a unit like this.. SIMPLY to correct the aged and problematic circuitry from that era? Using a modern power rectifier and inserted complete PCB with all components in place.. just solder the original sheilded wires to the new board... 1. Would that illiminate "theoretically" the issues that brings these units to your bench in the first place? 2. You mentioned the cascading sound change by replacing with modern material reisitors on the original board.. Would that happen as well.. intertaining the theoretical modern PCB replacement... or could that be compensated for while designing the theoretical PCB as a known charactoristic "flaw" of the modern material resistors? No.. Im not insane.. and for your readers.. Im just exploring and theorizing as a novice engineer (more student then anything) with a well respected engineer who really knows his stuff. The problem with modern solid state amps.. I suspect.. is that when designing them.. the engineers already plan to use as cheap components within perameter as possible.. as you metioned Leo might do today if he were working on this unit as a repair.. Im theorizing.. for the highest quality sound, just as you did , tracking down and removing the water fall in the volume pots in the final stages of sound test and repairs.. Thoughts? Im open minded and willing to learn.. Its not a question of should it be done.. Im asking "could it be done".. Some folks are finatical about tube amps in general, I am not.. Im a fella without a lot of money, I tried a flag ship tube amp, a Randall.. and it arrived needing another $700.00 in tubes.. I learned real quick.. I didnt need or want a tube amp. No matter how good they sound or not. So.. honestly Im a solid state guy.. doesnt mean I cant appreciate what you do here, and appreciate the antiquity of these units or the era in which they were designed and built.. Im not talking about digital processors replacing actual components.. Im just talking about a printed circuit board, in place of paper, and the double sheilding. Sagging issues.. along with the DC voltage bleed you found by having too close proximity eyelets to higher voltages.. and associated issues of contamination
I have completed all 8 videos in one day. Congratulations on reviving this magnificent Amp. What a great reminder of when music was fun and had a spirit.
Some serious "shimmer" going on here. Sounds absolutely phenomenal. Those re-coned speakers sound amazing as well. I miss lower "sensitivity" speakers. They really are the X factor.
I know this an old video, but I love the flamed maple neck on your strat.
I know this one is a couple months old, but I have been watching all 8 parts today as I work. I really appreciate that you take us along on these with you. I even enjoy the hour long videos! I always wondered to myself about the cloth insulated wires, but never knew the cloth could become conductive, or that the wires could become microphonic like you showed. I am a mere hobbyist but I love the learning and I thank you Lyle
Really enjoy your videos sir.. thankyou for what you do..
It just occurred to me that, Im the kinda guy that watches electrical engineering videos for relaxation. Lol.
Yes.. i did watch all 8..
I truly appreciate your attention to detail..
I had wondered for a moment or two, until you mentioned it..
"Why didnt you just change out the yellow and bkue wires for new insulated, instead of cleaning??"
You addressed it verbally.. as if on cue..
Its the effort to retain as much original equipment and components as possible, in such a rare vintage amplifier...
I completely understand now.
Subsequently.. I being born 7ish years after this amp left the bench as brand new..
Played with an idea, that I want to run by you simply for intertainment purposes..
Setting ALL collector value and vintage retention values asside for the moment.
Could an engineer retrofit modern PCB and components into a unit like this.. SIMPLY to correct the aged and problematic circuitry from that era?
Using a modern power rectifier and inserted complete PCB with all components in place.. just solder the original sheilded wires to the new board...
1. Would that illiminate "theoretically" the issues that brings these units to your bench in the first place?
2. You mentioned the cascading sound change by replacing with modern material reisitors on the original board..
Would that happen as well.. intertaining the theoretical modern PCB replacement... or could that be compensated for while designing the theoretical PCB as a known charactoristic "flaw" of the modern material resistors?
No.. Im not insane.. and for your readers..
Im just exploring and theorizing as a novice engineer (more student then anything) with a well respected engineer who really knows his stuff.
The problem with modern solid state amps.. I suspect.. is that when designing them.. the engineers already plan to use as cheap components within perameter as possible.. as you metioned Leo might do today if he were working on this unit as a repair..
Im theorizing.. for the highest quality sound, just as you did , tracking down and removing the water fall in the volume pots in the final stages of sound test and repairs..
Thoughts?
Im open minded and willing to learn..
Its not a question of should it be done.. Im asking "could it be done"..
Some folks are finatical about tube amps in general, I am not..
Im a fella without a lot of money, I tried a flag ship tube amp, a Randall.. and it arrived needing another $700.00 in tubes..
I learned real quick.. I didnt need or want a tube amp. No matter how good they sound or not.
So.. honestly Im a solid state guy.. doesnt mean I cant appreciate what you do here, and appreciate the antiquity of these units or the era in which they were designed and built..
Im not talking about digital processors replacing actual components..
Im just talking about a printed circuit board, in place of paper, and the double sheilding. Sagging issues.. along with the DC voltage bleed you found by having too close proximity eyelets to higher voltages.. and associated issues of contamination
Sounds gorgeous aside from those little crackles.
Beautiful 3D sounding reverb, that's a nice tank in there.
I have completed all 8 videos in one day. Congratulations on reviving this magnificent Amp. What a great reminder of when music was fun and had a spirit.
Ohhhh I could fall in love….with that amp.
love a Twin, they sound awesome at any volume!!!
I'd say it probably sounds better now than it did when it was new. Great job.
Some serious "shimmer" going on here. Sounds absolutely phenomenal. Those re-coned speakers sound amazing as well. I miss lower "sensitivity" speakers. They really are the X factor.
Stepping up the playing… sounds great
Are there any further videos on this amp? ("Yet?") :-)
Ah… Chris Isaak intro…nice
Man that neck is beautiful 😍