Does anyone know what happened to SUMO Electronics?

The Charlie tuner I had was made by Sumo.

JD,   one of my best friends still uses an Electra.  He has made a ton of cap improvements on this pre and it responded incredibly to the changes.  This pre already uses 1% metal film resistors, but it is full of sub par caps. so if you figure out the repair, do yourself a favor and replace the electrolytic and ceramic caps while you are in there. 
This old pre gets shockingly good.

timlub, Once it's all apart, changing some caps should be no big deal.

Thanks.

JD

My living room system is running the Sumo Andromeda & Athena with Martin Logan Theos. I am the original owner of the Sumo gear. Jim rebuilt the Andromedia in 2011 out of his shop near Santa Barbara, but wouldn't touch the Athena because it wasn't his design.

I worked at gas in the late 70's and Charlie the Tuner nearly bankrupted the company... Ed Miller and Danny Seifert worked on it non stop for years. every time they had a circuit, a new and cooler chipset came out... lol I look back fondly on those years.