My ad140tc head is turning on and the tubes are apparently warming up, but I am getting no sound. If I turn both the gain and the master all the way I get a faint, distorted, and crackling sound, but that is it. It was good up until today when I tried to run two 16ohm cabs, one from each of my 8ohm outs. Any ideas about what has occurred?
Thank you very much.
No dice.
Moderator: bclaire
doesn't sound good. If possible don't turn it on anymore. Take it to a tech as soon as possible.
One question: have you recently changed the pre amp tubes at all? I have heard more than occasion where a grid resistor was blown from the improper installation of tubes on these amps, i.e., the sockets had been misaligned to the point where improper contacts caused the g.r. to blow. The sockets are attached to the board. This is a very cheap way of construction, and about the only part of the construction of this amp I have a serious problem with.
If not, then it maybe it's something else.
One question: have you recently changed the pre amp tubes at all? I have heard more than occasion where a grid resistor was blown from the improper installation of tubes on these amps, i.e., the sockets had been misaligned to the point where improper contacts caused the g.r. to blow. The sockets are attached to the board. This is a very cheap way of construction, and about the only part of the construction of this amp I have a serious problem with.
If not, then it maybe it's something else.
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bigbrotherwatching
- New Member
- Posts: 4
- Joined: Sat May 01, 2004 10:12 pm
Yes. In fact, I installed tubes not four months ago, and was just noticing today that they are poorly alligned (i.e. they don't quite make it all the way down). The tubes are so fragile I didn't want to force them more than I did, which felt like too much anyway.
Thank you for your advice. I really appreciate it.
Thank you for your advice. I really appreciate it.
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