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

[jminassi]

The diyaudio speaker protection accepts 12vac? I assumed it was 12vdc. Does the DC speaker protection boards from the group buy, do they require 12vac or 12vdc?

Rod, you need to look at the Build Guide. The rectification and smoothing is done on the speaker protector board. You need to feed it AC. 6 or 12 VAC depends on the relays you are using.

J

 

[tomchr]

Indeed, Neurochrome's soft start is Rolls Royce. All features you could think of and max 2kVA transformer. A beefier standby supply is about all I would want (0.5W is a tad weak). Adjustable LED brightness is a very nice touch.

I'm curious how much power you need. Also curious what you're using the standby supply for. Just so I can better understand the end application, that's all.

Tom

 

[RodimusPrime98]

Rod, you need to look at the Build Guide. The rectification and smoothing is done on the speaker protector board. You need to feed it AC. 6 or 12 VAC depends on the relays you are using.

J

Thanks, makes sense!

 

[RodimusPrime98]

Some progress yesterday. I configured the DIYaudio soft start, 2x Antek transformers (stacked on top of each other), and 2x DIYaudio PSU (also stacked on top of each other) with the success for end result of +/- 71.5VDC! I haven't figured out why the -71.5VDC side of each PSU won't light the LED, maybe I installed it backwards? I can't wait for the new boards to be delivered!

 

[RodimusPrime98]

@jjs For the speaker protection boards in the group buy is IXTH130N20T a suitable replacement for IRFP4668PBF? IRFP4668PBF is out of stock on Mouser. Here is IXTH130N20T: https://www.mouser.com/ProductDetail/IXYS/IXTH130N20T?qs=6UKyFUzHTllvsxEXCJ2L5w==

Also, I am looking for an alternative for the optocouplers TLP591B as they are also out of stock on Mouser.