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Topic: Tamborine in my amp |
Brooks Montgomery
From:
Idaho, USA
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Posted 15 Aug 2018 8:26 am |
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Question for you amp gurus. Last night I played a gig with some Challis Idaho boys at our local watering hole. I played lap steel thru my Fender Hot Rod Deluxe and I experienced a new bizarre sound that neither the lead guitar player, nor I, could figure out (and I admit I didn't try real hard).
Playing harp thru channel 1, and steel thru channel 2, When I was setting up levels and tones and I hit the over-drive channel and played loud, the amp emitted a tamborine jangly sound. this was only when I was over-driving the amp.
The amp was on a tilt stand. . . .could it have been the reverb spring getting roughed up from the rumbling overdrive?
When I set the amp to the normal gig volume (lower) it did not make the sound.
Obviously I'll look into it further when I have the time, but I thought I'd ask you jedi-amp guys here first,
thanks,
_________________
A banjo, like a pet monkey, seems like a good idea at first. |
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Michael Butler
From:
California, USA
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Posted 15 Aug 2018 8:48 am
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bump the amp with it on. perhaps it will make the same sound and you'll know.
play music!
_________________
please see my Snakeskin's Virtual Music Museum below.
http://muscmp.wordpress.com/ |
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Brooks Montgomery
From:
Idaho, USA
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Posted 15 Aug 2018 8:52 am
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| Michael Butler wrote: |
bump the amp with it on. perhaps it will make the same sound and you'll know.
play music! |
I did that,bumped the amp, and it made the normal echoey upset reverb sound. The tamborine sound is different, and is very much like the shimmer of the cymbals on a tamborine. Maybe just a different frequency disturbance of the reverb?
_________________
A banjo, like a pet monkey, seems like a good idea at first. |
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Fred Treece
From:
California, USA
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Posted 15 Aug 2018 9:07 am
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Turn the reverb off, test. Unplug one instrument, test. Switch the channels you have instruments plugged into, test. Make sure tubes are all tight in the sockets. With power off, twist all control knobs back and forth a few times.
That’s not Jedi stuff, but it takes care of some of the things any Jawa could do. |
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Marc Jenkins
From:
Victoria, British Columbia, Canada
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Posted 15 Aug 2018 10:19 am
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| I’d guess a microphone tube - turn the reverb off, turn the amp up and very lightly tap each tube with a chopstick or similar. If you get the ringing sound, bingo. |
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Brooks Montgomery
From:
Idaho, USA
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Posted 15 Aug 2018 10:26 am
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Thanks guys. Good ones--I will follow your advice.
_________________
A banjo, like a pet monkey, seems like a good idea at first. |
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Fred Treece
From:
California, USA
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Posted 18 Aug 2018 9:01 am
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| Brooks, did you ever figure out what it was? |
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Brooks Montgomery
From:
Idaho, USA
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Posted 18 Aug 2018 7:09 pm
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| Fred Treece wrote: |
| Brooks, did you ever figure out what it was? |
Not yet. Played a gig in Challis, Idaho last night, used the amp, set it on stage with no stand, never did it , but I played at a lower volume.
I'll try and mess with it at home when I get a moment. Thanks for asking.
_________________
A banjo, like a pet monkey, seems like a good idea at first. |
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Pete Burak
From:
Portland, OR USA
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Posted 19 Aug 2018 8:17 am
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I had a Speaker that did this once. I was a 15" 4ohm Weber Michigan.
If you can get it to do it again, I would have a known-good speaker nearby to A/B with. That would rule out the speaker at least. Or find the source of the problem.
I replaced the speaker. |
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Larry Dering
From:
Missouri, USA
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Posted 19 Aug 2018 8:57 am
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| I would go with the tube option. My Peavey classic 30 does this and I put silicone o-rings over the tubes to help silence it. Not sure anyone else can hear it but I do. |
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Dan Robinson
From:
Colorado, USA
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Posted 19 Aug 2018 10:31 am
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| Larry Dering wrote: |
| I would go with the tube option. My Peavey classic 30 does this and I put silicone o-rings over the tubes to help silence it. Not sure anyone else can hear it but I do. |
Yep, tubes can all be microphonic to some degree. EuroTubes has those silicone damper rings: Eurotubes.com/Damper_Rings
But when this starts suddenly I'd be concerned with a damaged tube. I wouldn't run my amp with a tube that might have internal damage, especially one of the output tubes.
My HR Deluxe had the same symptoms that Brooks is experiencing. I did the "chopstick" test with rear panel removed (caution==> B+ is 430V), and a meter on the bias test point. The readout went crazy when I tapped the tube. Wild swings in idle current. Not a happy situation for the amp. An internal short, or arc = $$.
Brooks, I sent you an email. |
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