Sorry to bring this up again

If you favor these amplifiers already sounds like your becoming knowledgeable on mods to keep them alive.
Alternative is explore past your comfort level or what you favor.
Maybe there is something else that would do the same for you.

Otherwise owning multiple copies is a way to acquire working units or parts in the future.
Nothing new, I am guilty of buying 3 or 4 devices myself that are vintage in nature.
Was not to do with failure rates, if you have a favorite you have a favorite.

Having lost many things to moving and relocation. Eventually did have to find new things.
My favorites tend to go up in price over the years so buying back certain things is expensive.
Almost insulting at times.

If your location is stable then buy as many as you can.
Constant worry is stressful, I would also recommend finding pleasure in new things as well for relief
I think I have come to an conclusion, I’m getting one spare of the amp/pre. Turntable I’m not worry about either the speakers.. cassette deck get used 3 hours a month so not so worried there either.. cd player I dot think will be a problem to get… minidisc I’m getting a cheap Sony player as main player/recorder and use my technics only for playback occasionally. I even going to get the transistors and ic’s that’s available for my amp.
 
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Hooked up a temp sensor to check the temp after a play session of about 2 hours at good listening volume…
 

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