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

Hi Ed,
I think it would actually go along the lines of speakers (the average ones), analog source, recorded media or digital source (some are pretty bad), and amplifier. On average of course. Some folks have darned good speakers but the average speaker isn't something I'd want to listen to. By the same token, I have heard some awful amplifiers. Same for analogue sources, big difference between an open reel or Nakamichi working properly, and a "double trouble" cassette deck. Some tuners are good (Revox), some pretty terrible. So a hard and fast list is difficult.

-Chris
 
Hi Guys,

I've got a question about the transformers used in a Wolverine. Let us assume there is a dual mono power supply. With approximately 71 V rails each of the two transformers will have dual 50 V secondaries at 5.0 A. One of the two transformers will have an additional 9 V secondary at 2.0 A used to power a diyaudio speaker protection circuit. If one channel's transformer has a VA of 500 and the other has a VA of 520, will this impact the performance of the amplifier in any way?

I have not ordered transformers yet. I'm considering Audio Grade Toroidy transformers.

Let me know if this is a dumb question, or if it could cause me problems.

Many thanks,

John
 
hi, i have a question about placing resistors and diodes around C102-3, C106-7 caps

i have a lot of 270uF 12.5mm dia caps for that positions, but if i'll use them, there is not enough space for R101/4, D111/112, D113/114, D105a/106a and maybe R102/103. I plan to mount those elements at the bottom side of the board.

Board will be mounted perpendicular to the heatsink. boards ef3-3 and ef3-4

are there any caveats that should taken into account?
 
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Hi Guys,

If one channel's transformer has a VA of 500 and the other has a VA of 520, will this impact the performance of the amplifier in any way?



John
John,
I would most likely keep the transformers identical and with the least amount of secondaries, but not because of the possible impact in the performance(BTW no performance impact) , but because I like to keep things simple.
 
my question is more towards lack of space between components
resistors and diodes are touching capacitors

placing them at the bottom side would partially fix this. but BOM shows different components values depending on mounting style (parallel vs perpendicular) and this might be connected with how air cools components (my assumption)
so don't know how different placement might impact my build 🙂
 

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Hi Ed,
I think it would actually go along the lines of speakers (the average ones), analog source, recorded media or digital source (some are pretty bad), and amplifier. On average of course. Some folks have darned good speakers but the average speaker isn't something I'd want to listen to. By the same token, I have heard some awful amplifiers. Same for analogue sources, big difference between an open reel or Nakamichi working properly, and a "double trouble" cassette deck. Some tuners are good (Revox), some pretty terrible. So a hard and fast list is difficult.

-Chris
John,
I would most likely keep the transformers identical and with the least amount of secondaries, but not because of the possible impact in the performance(BTW no performance impact) , but because I like to keep things simple.
John,
I would most likely keep the transformers identical and with the least amount of secondaries, but not because of the possible impact in the performance(BTW no performance impact) , but because I like to keep things simple.

Thanks asuslover. If I do that, how do you propose I power the Diyaudio Speaker Protection Board? Use a separate small transformer? It requires 12VDC to power the relays.

John