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N Cook
Guest
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 Posted: Tue Dec 12, 2006 1:03 pm Post subject: Crate BV120H guitar amp, probably 1991 |
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History , there was a smell of burning followed by cutting out.
Next time powered up high pitched squeel.
Now on powering up very muted output like half-wave and sometimes a burst of
high frequency squeel but all at low level.
Nothing obviously burnt or over-heated inside.
Stable HT voltage. 4x 6L6
Same distorted sound on the line out.
Before testing the valves etc, anyone have any pointers ?
--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/ |
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Meat Plow
Guest
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| Posted: Tue Dec 12, 2006 1:03 pm Post subject: Re: Crate BV120H guitar amp, probably 1991 |
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On Tue, 12 Dec 2006 12:19:42 +0000, N Cook Has Frothed:
| Quote: | History , there was a smell of burning followed by cutting out.
Next time powered up high pitched squeel.
Now on powering up very muted output like half-wave and sometimes a burst of
high frequency squeel but all at low level.
Nothing obviously burnt or over-heated inside.
Stable HT voltage. 4x 6L6
Same distorted sound on the line out.
Before testing the valves etc, anyone have any pointers ?
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Take another visual, if you smelled it, it should show up.
--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004
COOSN-266-06-25794 |
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N Cook
Guest
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| Posted: Wed Dec 13, 2006 2:27 pm Post subject: Re: Crate BV120H guitar amp, probably 1991 |
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followup see new heading
16 ohm amp --> 4 ohm speaker block (ex speakers) |
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