DIY Class A/B Amp The "Wolverine" build thread

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#2,504
500 Ohm is the recommended value.

With 200 Ohms after the modification you may have a small amount of bias
With the potentiometer at maximum and possibly not enough adjustment range.

A large amount of credit goes to Andy (fireanimal) since he did alot of actual testing post simulation (by Stuartmp and JJS) to make sure this potentiometer value was suitable.

- Also spend the couple of dollars for a Bourns 3296 potentiometer not a fake.

Hope this helps.

- Daniel
 
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#2,508
fireanimal said:
C1 is the only cap in the signal path on the wolverine. It measured the same as the film cap so therefore it will sound the same, I measured to give builders options / lower price alternatives if on a budget. Personally Film is the only way to go in that position, but to each their own.
Click to expand...
With outputcaps in my preamp, is it possible to bypass C1 without to much fuzz in the amplifier? Making the amplifier signalpath capfree...

Regards
 
#2,509
I would say it is better not to do that for a few reasons.

Even though there is an output cap some preamps have a dc offset as the preamp powers up.

If you use another source it may have a dc offset

The capacitors recommended were chosen carefully not to impact the LF response and have been proven to have low THD.

I hope this is useful

- Dan
 
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#2,510
Opinions about how I should layout chassis with transformers. I think this is the best way to help prevent noise from them.
 

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#2,511
With two transformers I would still try to stag them if possible with the ability to refuse some noise and keed the e.caps and bridges as one unit in one end og the amp.
If you wanna proceed with the internal mounted heatsink, good wiring needs quite some attention, as it's quite easy to make messy and big loops as previous mentioned in this thread..

My English is not the best, so hope there is not to many mistakes in my typo🙂
 
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#2,512
@90scaraudio Could this be an option for further improvement in your layout? 🙂
Haven't drawn the signal/speaker-out wirring.

Blue is AC, yellow is wire from transformers and PSU. Green is the boards

IMG_0093~2.jpgIMG_0093~3.jpg

The one where the heatsinks are close together, seems to be good at conducting heat, Chimney effect sort of.. But the transformers would be closer to one PCB then the other as a sideeffekt, but with some distance to the IPS...

Regards
 
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#2,520
Looks like a very interesting amplifier to build. Haven't read the whole thread (yet) but have tried to search for answers on some questions I have;
1) What are the audible differences between a lineair and SMPS power supply?
2) How much idle power does the Wolverine use?
3) How difficult would a three or four channel amplifier be to build? (I need at least three per speaker)
 
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