CONTEST What? Another Contest?

CONTEST
Chuck D. Bones said:
Thanks for the reply!
Which part of the rotation is that? Are you comparing your setup with a 100K or a 50K pot? The 47K load (R3 on your sch) has a huge effect on the tone network.

There are as many opinions on how a BMP tone stack should be constructed as there are BMP builders. I'm no exception. I use that style tone stack on many of my designs, and each time it's a little different.

Same goes for the SUSTAIN pot. Some folks like A-taper, some like B-taper. C4, C5, R13 and R19 (on your sch) interact strongly with the SUSTAIN pot near the max end of rotation.

For a simple circuit, there is a lot going on in the BMP.

Those collector voltages are as I expected.
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The 100k resistor on the 100k pot. Mine are all liner btw. So the tone pot didn’t do a whole lot between 9:00 and say, I don’t 6 going cc’s. That’s not the case now. The sustain pot didn’t really need one, but the volume pot was a little more touch sensitive. I just built a hizumitas, a definite difference.
 
Brilliant contest, CDB, and brilliant contestants = great thread.

I’ve got a couple [brand-x] Muff PCBs I fully socketed for experimentation/comparisons, but I’ll see if any of my old ideas can be worked out on the mini-proto board Fig graciously sent me — though uncompetitive, I’m inspired.
 
Feral Feline said:
Brilliant contest, CDB, and brilliant contestants = great thread.

I’ve got a couple [brand-x] Muff PCBs I fully socketed for experimentation/comparisons, but I’ll see if any of my old ideas can be worked out on the mini-proto board Fig graciously sent me — though uncompetitive, I’m inspired.
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No competition here. Just a man and his cat with a protoboard and some Led Zeppelin. Just have fun. That’s all that matters
 
fig said:
...AND? How does it sound sir?
It certainly looks impressive! Well done!
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Thanks 😁 It sounds a lot like the Soldano GTO which is what I based it on, though frankly I think the original tonestack was more useful than this one. I finished it at midnight so I didn't get any recordings last night, I'll see if I can get one tonight.
 
vigilante398 said:
Thanks 😁 It sounds a lot like the Soldano GTO which is what I based it on, though frankly I think the original tonestack was more useful than this one. I finished it at midnight so I didn't get any recordings last night, I'll see if I can get one tonight.
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I can almost hear BtR's heart beating from here, as he browses the tube aisle over at Antique Electronics. ;)

Speaking of which, the remaining parts for my kajigger Left AEP in Tempe on it's way to NC, but is currently in Nashua, NH. Now, I've never been to Nashua, but I hear it's a nice enough burg yet as quaint a village as it may be, I see no reason why my bits are there. ILLogicistics at it's finest. :ROFLMAO:
 
fig said:
I can almost hear BtR's heart beating from here, as he browses the tube aisle over at Antique Electronics. ;)
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Tubes are a whole different beast for me to tackle and haven't gotten around to it yet. Mostly because of the $15+ price tag for each 12ax7. I'll stick with my $0.25 jfets and bjts for now.
 
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vigilante398 said:
Alright, here's my spaghetti mess "DeathMuffin." The answer to the age old question "what would a Soldano preamp sound like with a BMP tonestack?"
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What voltage are you running at? Those tube socket adapters are cool! Much easier than all the flying leads I've done in the past.
 
BuddytheReow said:
Tubes are a whole different beast for me to tackle and haven't gotten around to it yet. Mostly because of the $15+ price tag for each 12ax7. I'll stick with my $0.25 jfets and bjts for now.
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I buy mine in bulk so I get them for about $10, but yup it's a solid point.

Blooze said:
What voltage are you running at? Those tube socket adapters are cool! Much easier than all the flying leads I've done in the past.
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I'm running at 200V, didn't want to push it because of how tightly the components are packed :P

I don't breadboard much anymore, but these definitely make it way easier to breadboard with tubes. PM me your address, I can send you a couple boards if you want. I got like 50 of them 5 years ago and still have about 30 left.
 
Okay....here's what I have so far....if you need any detailed analysis just say the word.

wRB7bpS.jpg
 
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