Docdan50: I reside in Maryland, land of 4 seasons. Here, the summers are getting hotter & more humid. In MD, A/C is very expensive , up near 500 % from the time when I purchased a tube amp. Thanks Gov'.
As in Texas warm weather relates to a change-over from tubes to solid state.
This year Dave Cocklin's S.O.B.'s;they are 84-90W,use 6550's or KT-88's Test-Beds , serial #'s I & II sneezed ; the iron plates in the chokes started to create a slight mechanical noise . Doc, these amps have been good to me. Besides unparalled sound, I have had no break-downs in 18 years of ownership . I am the second owner to David who is no longer with us.
Eric Falkenhan (410-467-3620) is to replace the Chicago Standard Collins R-63 Chokes with drop-in replacements. The alternative would be a mucho-buck rewinding & potting or re-dipping of the plates, not kind things to a bank account in hard times.
The A-500's have been returned to service in the "Big Rig". In my view they stand on their own merits with any speaker source & are of course "cheap as dirt".
Doc, the best to you & your amp source. Pleas keep us informed of your listening experiences.