Tone Vendor mkI Veroboard

[NickC]

ok i added the ic for the + 9v to the layout, now i need some advice to find a supply of pnp transistors to test!
let's start the quest!

 

[fig]

Done. Just let me know what range you’re after and I can send you some to get you started.

 

[NickC]

thank you Mr. @fig ! , i 'd like to start with some q1 q3 between 80-100 hfe with high leakeage and a low leakeage 100-120 hfe for q2

 

[fig]

I’ll see what I can round up

 

[Coda]

Good luck. I’ve had a MK I TB built for well over a year now…every few months I get some new GE to test out…and the search continues…plenty of Peppermint, though…

 

[NickC]

yes i know it could/will be a rabbit hole

you could make a movie Lord of the Benders: The Fellowship of the Transistor !

 

[fig]

These should do it.

 

[steviejr92]

Im so interested on how this comes out!

 

[Coda]

yes i know it could/will be a rabbit hole

you could make a movie Lord of the Benders: The Fellowship of the Transistor !

And then there’s my FZ-1 build…not enough leaky Ge left out there.

 

[NickC]

Im so interested on how this comes out!

yeah i will make some demo!

 

[NickC]

These should do it.

yeah of course!

 

[fig]

DM your address and they’ll leave here today. Else the next seaplane won’t be by for another six weeks.

 

[Mark]

thank you Mr. @fig ! , i 'd like to start with some q1 q3 between 80-100 hfe with high leakeage and a low leakeage 100-120 hfe for q2

How it turn out?
Was your TB MK1 smooth sounding or did it have the Velcro thing going on?

I was wondering if the transistors will a gain if a 100+ were too small. In that there was too much gain and compression.

Thanks for your help.

Regards

Mark

 

[Lightsoundgeometry]

i just took a chance on ebay with a guy from Ukraine who people have mentioned before in forums like diysb .. got 24 duds it looks like ..his ad said for fuzz tested .. all have leakage 600-1200 ...almost all germanium been sorted out it looks like ..i tried them in a few breadboards and got nothing ..

 

[NickC]

How it turn out?
Was your TB MK1 smooth sounding or did it have the Velcro thing going on?

I was wondering if the transistors will a gain if a 100+ were too small. In that there was too much gain and compression.

Thanks for your help.

Regards

Mark

all depends on transistors, you have to test a lot to find your sound, It's been a while since I used fuzz, I've gone back to playing only with distortions from heads or combo, at most an overdrive to boost the dirty channel

 

[NickC]

i just took a chance on ebay with a guy from Ukraine who people have mentioned before in forums like diysb .. got 24 duds it looks like ..his ad said for fuzz tested .. all have leakage 600-1200 ...almost all germanium been sorted out it looks like ..i tried them in a few breadboardsView attachment 98536 and got nothing ..

write to musikding and ask for a set, forget about the transistors from Ukraine, they are not suitable, I tried many of them too and one decent one came out every 100

 

[PedalBuilder]

i just took a chance on ebay with a guy from Ukraine who people have mentioned before in forums like diysb .. got 24 duds it looks like ..his ad said for fuzz tested .. all have leakage 600-1200 ...almost all germanium been sorted out it looks like ..i tried them in a few breadboardsView attachment 98536 and got nothing ..

Some models of germanium transistors are just very leaky, it’s the nature of the beast. And the leakier the transistor, the more that the leakage will fluctuate with temperature. A transistor that leaks 10μA at 60°F will leak ~20μA at 78°F, not enough of a change to meaningfully affect the bias. But a transistor that leaks 350μA at 60°F will leak ~700μA at 78°F. Was it warm in your room? And did you let the transistors settle to room temperature after handling them? The GT404x family of transistors tend to be on the leakier side, but 1mA seems high if you’re measuring them at 70°F.

(And are you sure that he said that the transistors had been tested on the eBay listing? I’ve never seen that from him, and I’ve bought quite a few from him over the years.)