Hi,
I hope nobody minds my re-opening a very old thread.
I bought this amp in a yard sale last week.
It's an R5, in virtually showroom condition, with original cover, original instructions, even the original retail hang-tag.
It doesn't play right now: just a loud buzz the comes on gradually as the tubes warm up. I've only had it powered up for about 30 seconds.
I'd love to hear some opinions on what to do with it. I'm capable troubleshooting and/or rebuilding the circuit. To what extent is that appropriate? I want to maintain its value as well as is possible.
1) Is it detrimental to the value to use axial capacitors instead of the can, for which I don't think a replacement is even available?
2) I don't like 2-prong power cords, and for my own use would replace with a 3 prong, properly grounding, death cap out etc... is this a no-no as far as a collector's item?
3) How much preventative maintenance is wise? My background is in Organs and typically it's thought good practice to pro-actively replace plate resistors, coupling caps, etc - but collectibility concerns don't come into play quite as much there.
I'll be happy to post pictures of the back, inside, etc... scan of the instructions and schematic, whatever... just ask.
Thanks,
Mike