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problem with my TFM 15CB

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Paul Mattei

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Post Thu Aug 18, 2011 10:33 pm

problem with my TFM 15CB

Just bought this amplifier. At very low volumes, you can hear the left channel start to drop out. As soon as I turn the volume up on the pre-amp, it comes back in just fine. After it has been on a while, the problem disapears.
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F1nut

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Post Fri Aug 19, 2011 1:47 am

Re: problem with my TFM 15CB

Unless you don't mind spending more money than you paid for it send it out for repair. Otherwise, just leave it on all the time.
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engtaz

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"TAZ"

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Post Fri Aug 19, 2011 2:17 am

Re: problem with my TFM 15CB

Welcome
engtaz


Carver M4.0T in front channels to Caver AL VI's in SACD & 2 Channel setup
C 16, PT 2400, Slim Device, Carver TX-8, 490T and Rega TT w Grado Gold cart in the 2 channel setup
Bogen SRB20 is computer amp
Carver PM-350 donated for youth church use
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kingman

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(pair of) SILVER-7 TUBE AMPs

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Post Fri Aug 19, 2011 4:48 am

Re: problem with my TFM 15CB

May be that the volumn pot on the pre is oxidized. Have you tried this pre with another amp without this problem? Spray a little deoxit on it and see if the problem persists.
In reality, it only matters what it sounds like to YOU!!!
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Paul Mattei

Newbie

Posts: 3

Joined: Fri Aug 05, 2011 7:09 pm

Post Fri Aug 19, 2011 8:49 am

Re: problem with my TFM 15CB

I cleaned the Pots already. I suspect is may be a electrolytic cap issue. One of the small electrolytics in the signal path???? Help!!!
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BillD

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Post Fri Aug 19, 2011 9:32 am

Re: problem with my TFM 15CB

I'm thinking it's a cold (thermal) solder near the input, otherwise, it wouldn't just happen at low volume. I'd look at touching up the solder on all the components (a few resistors and caps) leading up to the first transistor on the left channel.
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
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Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
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Mr. M-500t

(pair of) SILVER-7 TUBE AMPs

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Joined: Fri Mar 17, 2006 10:00 pm

Post Fri Aug 19, 2011 10:51 pm

Re: problem with my TFM 15CB

How much you want for it ? I need parts ! :D
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angelod307

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Post Sat Aug 20, 2011 12:42 am

Re: problem with my TFM 15CB

I know I need another meter.
CarverFest: I just go for the arts and crafts
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kingman

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(pair of) SILVER-7 TUBE AMPs

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Joined: Sun Nov 30, 2008 2:10 pm

Location: Upstate South Carolina

Post Sat Aug 20, 2011 9:14 am

Re: problem with my TFM 15CB

Have you tried this pre with another amp without this problem?
...Well???? Have you??? May be the pre... :-s
In reality, it only matters what it sounds like to YOU!!!
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Paul Mattei

Newbie

Posts: 3

Joined: Fri Aug 05, 2011 7:09 pm

Post Sun Aug 21, 2011 1:48 pm

Re: problem with my TFM 15CB

I am using my Marantz 2230 as the pre amp and it works fine by itself.
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treitz3

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"Julian"
"Julian"

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Post Sun Aug 21, 2011 2:14 pm

Well, if you just bought it...can you send it back to the seller and have him/her fix it or offer you a refund? Sounds like you got the raw end of the deal here and that's not fair.
In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence.

The best way to enjoy digital music reproduction is to never listen to a good analogue reproduction.

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OconeeOrange

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Joined: Sat Mar 28, 2009 6:24 pm

Post Sun Aug 21, 2011 2:32 pm

Re: problem with my TFM 15CB

By definition, all the Carver gear is old. Much of it is worn down. Shipping the higher $$ pieces out for repair is a good deal as you get back an excellent item.
On the other end, hard to justify even the shipping costs on some of it.

Maybe you need to just live with this and save up for a better one. To be honest, that is a fun endeavor. :D Yours does work, and so you have the luxury to shop for a long time to get a great deal on something. Shopping is fun, educational, and free. Sooner or later you will run across a deal your newly developed OCCD can not resist.
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beemers417

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Post Thu Aug 25, 2011 3:50 pm

Re: problem with my TFM 15CB

I can repair it
Gunter the wonder dog is watching you...

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