50 Watt preamp problem.

Castorp · Post by **Castorp** » Sun Jan 20, 2013 10:35 am

Hi everybody,

After changing preamp tubes the preamp tubes don't work any more. Tried new ones - same thing. They don't light up properly (glow just a little bit - power tubes light up like they should). Checked the heater voltages: 3,1 AC.
Need help!

ol foot · Post by **ol foot** » Sun Jan 20, 2013 10:50 am

Drain the caps and try to re-tension the socket pins first and see if that helps. Could also be a dodgy solder joint on the socket .

Castorp · Post by **Castorp** » Sun Jan 20, 2013 11:35 am

The sockets look good. I checked the heater line with a meter :OK . In standby the preamp tubes get a little warm, but simply not as hot as they should get.

demonufo · Post by **demonufo** » Sun Jan 20, 2013 3:01 pm

Preamp tubes don't get all that hot. I suspect the heaters are not your problem.

Castorp · Post by **Castorp** » Sat Jan 26, 2013 1:13 pm

Now, after re-soldering (can you put it this way- in English?) everything is fine. You where right, it was not the heater!
Thanks for helping!

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50 Watt preamp problem.

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