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ampmaster72
Not So Newbie
Joined: 21 Nov 2008
Posts: 5
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 Posted: Fri Nov 21, 2008 6:14 pm Post subject: peavey encore 65 no reverb |
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Hi, No reverb. tap on reverb unit and can hear springs so output works but no input. When I turn up reverb pot gets noisy. All wires to reverb check out. Any help appreciated.
Thanks |
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Herb
Ferret
Joined: 12 Aug 2006
Posts: 122
Location: Kansas City, Kansas
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| Posted: Sun Nov 23, 2008 4:54 pm Post subject: |
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Either the reverb tube is bad or one of the fine little wires on the coil inside the reverb pan is broken.
_________________
Yer guitar pickin' friend,
Herb
"It don't mean a thing if it ain't got that swing!"
Doghouse Jazz
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tw001_tw
Fierce Poodle
Joined: 26 Mar 2007
Posts: 278
Location: St. Louis
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| Posted: Sun Nov 23, 2008 6:32 pm Post subject: |
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At:
http://amptalk.com/message-board-forum/viewtopic.php?t=2166&sid=dd6e253adedbc8e9feec1a3a3ce6e612
| ampmaster72 wrote: | Hey. Just checked power to reverb transformer and no voltage across leads. Any ideas now?
Thanks |
(just keeping things together....)
I take it you mean you measured for DCV between a gnd & the high voltage
lead on the reverb transformers primary side? and it was a zero?
with a quick look I could not find the encore 65 schematic. If I understood
you correctly, from this point you would follow the high voltage lead from
the reverb transformer back to.....???? (this is where I need to see it or see
a schematic..) and find out where things go wrong. it might come from
another high voltage connection, or might come from the filtering stage.
If I misunderstood your post, explain in better detail please. |
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ampmaster72
Not So Newbie
Joined: 21 Nov 2008
Posts: 5
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| Posted: Sun Nov 23, 2008 7:34 pm Post subject: no voltage |
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2 leads come out of the board a blue and a red. And they lead to the reverb transformer, there is no voltage across them when the amp is turned on. I would think there would be some voltage across them. Right?
Thanks very much. |
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tw001_tw
Fierce Poodle
Joined: 26 Mar 2007
Posts: 278
Location: St. Louis
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| Posted: Mon Nov 24, 2008 4:05 am Post subject: |
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Yes. Measuring for DC across the Red lead and ground, you should get, oh,
somewhere between 150V & 400V (depending on your amp model). I think
about the same across the blue and ground (considering your reverb circuit
is tube based and not solid state.. I know the amp is tube based, but some
amps have a ss circuit thrown in.... this is where schematics come in handy.)
If this is the case, you should track down (back twords the power supply)
that zero voltage on the red lead, and see where/what goes wrong.
I take it you tried the simple things like replacing the tube and taking
continuity readings on the reverb cables & pan.. right? ( I'm only trying to
make sure as I have wasted bounds of time overlooking simple things..) |
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ampmaster72
Not So Newbie
Joined: 21 Nov 2008
Posts: 5
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| Posted: Mon Nov 24, 2008 4:13 am Post subject: encore 65 |
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"I take it you tried the simple things like replacing the tube and taking
continuity readings on the reverb cables & pan.. right? ( I'm only trying to
make sure as I have wasted bounds of time overlooking simple things..)"
Yes I have checked all the way from the tank input and everything was good until I got to the reverb transformer. I too have wasted much time overlooking simple problems. First thing I did was replace tubes and plug in second tank too check things.
Thanks very much. |
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