Regular Member
Joined: 13/08/2024
Location: NetherlandsPosts: 53
| Posted: 09:18am 24 Oct 2024 |
Hi Volhout,
Yes, that's right. One channel is indeed burned out and the previous owner/repairman put in two new germanium transistors. The photo shows two AD162 transistors next to the Japanese transistors. All resistors and capacitors have been re-measured, including the composite resistors, and everything is within tolerance. I love tolerances and they are easy to work with.
I don't do recapping because in many cases it is not necessary. Only defective components are replaced. If you are a stickler for detail with this old stuff, you make it extra difficult for yourself. This amplifier has driven my ASW Genius 300 ($$$$) speakers. After thorough inspection, I have complete confidence in this amplifier.Yes, I think it is important to give this old stuff an extended life. It is funny that you mention about the restoration of the 1957 Phillips power supply that the potentiometer does not crackle after so many years. I also noticed the same phenomenon with this Monarch amplifier. All potentiometers were reasonably free of cracking and I could not detect any Deoxit residues that predecessors might have used. What I do with these old potentiometers is powder a small amount of silver graphite over the resistance track. That helps miraculously very well.
[Edit on]The white box is from Tau Si Niu, black bean sauce with beef, black bean sauce with squid is also very delicious.[Edit off]
Edited 2024-10-24 19:24 by Marcel27