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-   -   Sylvania 45C14M progress. (http://www.diyaudio.com/forums/tubes-valves/215693-sylvania-45c14m-progress.html)

somebizarredude 5th July 2012 08:13 PM

Sylvania 45C14M progress.
 
i am almost finished with it
http://i50.tinypic.com/344ef7a.jpg
http://i47.tinypic.com/24erxjo.jpg

I have a question though. on the photo facts manual it says the speaker impedance for one channel is 3-4 ohms and the other channel is 6-8 ohms, would it be safe to run a 4 ohm speaker in the 6-8 ohm channel if i don't max out the volume? I remember reading that tube amps are more resilient with mismatched impedance

also for the life of me i cannot locate a replacement volume/loudness pot. I cleaned it out with deoxit but it still has dead spots and is very scratchy. does anyone know where i can find one?

I would really appreciate help locating a pot :confused:

Frank Berry 5th July 2012 08:27 PM

It's not likely that you will find a replacement pot for your amplifier.
2.2megs with a loudness tap at 650k is not a standard pot value.
Potentiometers with loudness taps haven't been manufactured for many years.

somebizarredude 5th July 2012 08:43 PM

Quote:

Originally Posted by Frank Berry (Post 3082767)
It's not likely that you will find a replacement pot for your amplifier.
2.2megs with a loudness tap at 650k is not a standard pot value.
Potentiometers with loudness taps haven't been manufactured for many years.

that's what i was afraid of : / I am mainly hoping someone on here just happens to have new old stock replacement lying around I can buy off of them. I have asked several repair shops with no luck. mouser electronics was even helping me hunt one down but they gave up.....


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