It is with much reluctance and sadness that I’m forced to sell my terrific Wolverine EF3-3 power amplifier. Fully operational, in pristine unmarked condition and completely finished in every way, this is a great amplifier! It’s a fantastic sounding amplifier that I thoroughly enjoyed building, and it’s provided me with many hours of audiophile enjoyment.
Unfortunately, in our small UK house I don’t have a specific music listening room, so I’m set up in a spare bedroom - which of course then needs to double up as a bedroom if/when required. Hence, available space for amps, etc. is at an absolute premium and I discovered the Wolverine enclosure (Dissipante 03/400B) was bigger than I’d imagined and was becoming a physical inconvenience!
So, it’s time to let it go and allow someone else to enjoy using this amazing amplifier.
Wolverine Build Guide Forum: htpps://www.diyaudio.com/community/threads/diy-class-a-b-amp-the-wolverine-build-thread.385920/
Built by me using version 4.0 pcb’s, components exactly as per the recommended BOM specification at that time. All components obtained from reputable sources (mostly from Mouser, remainder from Digikey, RS Components, Farnell, etc.). Photos attached and in brief, the specification is:
Any questions, send me a PM anytime.
Unfortunately, in our small UK house I don’t have a specific music listening room, so I’m set up in a spare bedroom - which of course then needs to double up as a bedroom if/when required. Hence, available space for amps, etc. is at an absolute premium and I discovered the Wolverine enclosure (Dissipante 03/400B) was bigger than I’d imagined and was becoming a physical inconvenience!
So, it’s time to let it go and allow someone else to enjoy using this amazing amplifier.
Wolverine Build Guide Forum: htpps://www.diyaudio.com/community/threads/diy-class-a-b-amp-the-wolverine-build-thread.385920/
Built by me using version 4.0 pcb’s, components exactly as per the recommended BOM specification at that time. All components obtained from reputable sources (mostly from Mouser, remainder from Digikey, RS Components, Farnell, etc.). Photos attached and in brief, the specification is:
- 2 x Wolverine v.4.0 & IPS pcb’s, fully populated as per recommended BOM, using:
- Driver transistors: Toshiba 2SC4793 & 2SA1837
- Output transistors: Onsemi NJW0281 & NJW0302
- Pcb heatsinks and some other items from @fireanimal, from DIY Audio Wolverine Build Forum.
- Linear power supply: 35 volt transformer supplying PSU board designed by ‘Circuit Basics’, which provides ~51 volts to amp boards. This equates to approx. 100W per channel output into 8 ohms.
- Soft start module with remote switch on/off and indicator.
- DIY ‘ground lift’ module.
- Speaker protection pcb’s (from DIY Audio Wolverine Build Forum - @Felix design, v.1.0), which provide short circuit, overcurrent, overheating, DC protection and power on delay and immediately switches speakers off to prevent audible pops/noise whilst turning amp on/off. – htpps://www.diyaudio.com/community/threads/diy-class-a-b-amp-the-wolverine-build-thread.385920/post-7772925 and also https://github.com/felix1024/SpeakerProtect
- RCA sockets & speaker posts from HiFi Collective.
- Van Damme, Mogami and silicon internal wiring where appropriate.
- All housed in Modushop Dissipante 03/400B 3U enclosure (440mm x 405mm x 122mm) with 4mm silver front panel and inner baseplate fitted. I’m also including an unused, brand new, (still unwrapped!) 10mm aluminium front panel. I was intending to replace the front panel, but never got around to it!
Any questions, send me a PM anytime.
