So... I've been working on a PCB for a push-pull driver using a triple-triode compactron tube.
Somehow, I sent the wrong version out to fab. It should work fine - I have NOT built it - but its missing a couple of features that I intended it to have, like an AC balance pot, and a CCS in the tail of the diff amp.
So, I have about 50 of these boards that I do not intend to use.
I'll give them away to anybody that wants them. Limit of 4 boards per person. Free! Although if you're outside the US I might ask you to pay for the shipping...
If you're interested, send me an email (the PM function is not the best way for me, sometimes I get no notifications). pmillett at hotmail works.
I'll attach a picture of the PCB, and the schematic. Hopefully they are readable.
Sorry, you're mostly on your own with this one, since I haven't even built it. I don't really have the time to help much with it.
Somehow, I sent the wrong version out to fab. It should work fine - I have NOT built it - but its missing a couple of features that I intended it to have, like an AC balance pot, and a CCS in the tail of the diff amp.
So, I have about 50 of these boards that I do not intend to use.
I'll give them away to anybody that wants them. Limit of 4 boards per person. Free! Although if you're outside the US I might ask you to pay for the shipping...
If you're interested, send me an email (the PM function is not the best way for me, sometimes I get no notifications). pmillett at hotmail works.
I'll attach a picture of the PCB, and the schematic. Hopefully they are readable.
Sorry, you're mostly on your own with this one, since I haven't even built it. I don't really have the time to help much with it.
Attachments
Potential builders.....I see a missing resistor. You will need to add a resistor from pin 9 of the tube to ground. It needs to be somewhere around 220 to 470K ohms.
Thanks George, I didn't notice that. Luckily I fixed it on the later revision...
Pete
Wow, they went fast. All gone.
Most of you that sent messages got them... if you sent a message after about 5:30PM Central time, you were too late.
I'll send emails to those of you that got them. Also, a few who were in time but still need to send me your mailing address.
If you missed out, I will have an improved version soon. But not free
For those of you in the US, I'll cover the postage. Do something nice for somebody.
Pete
Most of you that sent messages got them... if you sent a message after about 5:30PM Central time, you were too late.
I'll send emails to those of you that got them. Also, a few who were in time but still need to send me your mailing address.
If you missed out, I will have an improved version soon. But not free
For those of you in the US, I'll cover the postage. Do something nice for somebody.
Pete
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