Antique Sound Labs

Ah, direction already given. 

When/if you try them, use a Variac to slowly bring them back to life

https://antiqueradio.org/Variacs.htm

Will do. Familiar with the procedure. Thanks.

Bill Baker from Response Audio knows a lot about ASL. I believe he is working with Raven now, but the Response website is still up. He use to do a lot of modding on ASL. 

ASL offered great sounding tube audio gear at extremely competitive prices. A number of times their gear won praise from Hi End audio magazines like The Absolute Sound and Stereophile. I still have my ASL MG Head DT headphone amplifier, purchased new in 2001 and a pair of ASL Wave 25 tube monoblocks, purchased new in 2006. IME, great gear for the money. I agree with those who posted about contacting Tash Goka, as he was the North American distributor for ASL until Joe Lau (president of ASL) left the North American market.