Help: Lafayette KT-550 running cold

Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

I had not used my Lafayette KT-550 for about 6 months until recently. After letting it warm up for a couple of hours, the music does not sound as full and warm as I recall. So, while doing a manual inspection of the tubes I noticed that the tubes (KT-66 Tung Sol) and the input and output transformers were all running colder than normal. The output transformers were room temperature, normally they are a bit warmer. The input transformer was warm, but not very warm which is usually is. The output tubes also don't seem to be putting out as much heat as usual.

Granted, I live in Minneapolis area and the room temp is about 65 or so, but still, the amp just seems to be running cold and the sound is thin/cold.

Any thoughts on this?

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Topic - Help: Lafayette KT-550 running cold - banpuku 14:47:57 12/03/14 (4)

Solved! - banpuku 14:54:28 12/04/14 (0)

RE: Help: Lafayette KT-550 running cold - DAK 06:19:12 12/04/14 (0)

RE: Help: Lafayette KT-550 running cold - Chip647 17:12:20 12/03/14 (0)

heat up with hair dryer and it will sound warm/thick-NT- - elblanco 16:26:24 12/03/14 (0)

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