Testing / Fixing a Reverb Tank
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- Molly
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Testing / Fixing a Reverb Tank
Think the reverb tank in my Two Rock has packed in. I'm not sure how to test it but there's no continuity between the plugs. Could one of the chaps here clarify how you test them?
Thanks.
Thanks.
- sizzlingbadger
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Re: Testing / Fixing a Reverb Tank
Measure the input and output resistance is the first step. You won't get continuity between the input and output, thats normal.
Tube amp and guitar tones straight from 1958… amazing how believable the sounds were back then, even without the modellers...
- olegmcnoleg
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Re: Testing / Fixing a Reverb Tank
Have you been hitting it with your guitar again?
It is obvious that the amp is totally f****d. I'll give you $50 for it.
It is obvious that the amp is totally f****d. I'll give you $50 for it.
- Bg
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Re: Testing / Fixing a Reverb Tank
I'd also give it a visual, its usually the connection to the springs that breaks.... magnifying glass at the readysizzlingbadger wrote:Measure the input and output resistance is the first step. You won't get continuity between the input and output, thats normal.
So, is that low alcohol or no alcohol at all? mmmm, no alcohol, do you want to try it? Noooooooooo.
- Molly
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Re: Testing / Fixing a Reverb Tank
Thanks chaps. Had one fail in the past and was able to fix it but that was an obvious wire broken off. No such thing here. Found this link. Trusting the advice is accurate.
https://mesaboogie.zendesk.com/hc/en-us ... nk-is-bad-
Will take another look after tea.
Cheers.
https://mesaboogie.zendesk.com/hc/en-us ... nk-is-bad-
Will take another look after tea.
Cheers.
- Conway
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- Bg
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Re: Testing / Fixing a Reverb Tank
he'll be eating his birdseye fishfingers with chips and frozen peas.
So, is that low alcohol or no alcohol at all? mmmm, no alcohol, do you want to try it? Noooooooooo.
- Conway
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Re: Testing / Fixing a Reverb Tank
He already said it’s pizza night, tonight.Bg wrote:he'll be eating his birdseye fishfingers with chips and frozen peas.
- Molly
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Re: Testing / Fixing a Reverb Tank
It was delicious! I'm a master chef, me.Conway wrote:He already said it’s pizza night, tonight.Bg wrote:he'll be eating his birdseye fishfingers with chips and frozen peas.
- Molly
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Re: Testing / Fixing a Reverb Tank
Crossed my mind. Will check that if the tank tests OK.Conway wrote:Are you sure it’s not the tube driving it that’s the problem?
- Conway
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Re: Testing / Fixing a Reverb Tank
Hell yes.Molly wrote:It was delicious! I'm a master chef, me.Conway wrote:He already said it’s pizza night, tonight.Bg wrote:he'll be eating his birdseye fishfingers with chips and frozen peas.
- Molly
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Re: Testing / Fixing a Reverb Tank
Thanks for that. I followed that using info from the link below: "...put your ohmmeter leads across the tip and shield of the reverb tank’s return cable (the shielded cable). For most MESA amps with tube reverb circuits, the reading at the shielded cable's jack will be approximately 200Ω. Leaving a lead on the shield of the return cable, move the other lead to the tip of the input cable. When you read impedance of the input (the thinner, unshielded RCA cable), the reading will be approximately 1Ω. If either point reads open (.000) the tank is at fault."sizzlingbadger wrote:Measure the input and output resistance is the first step. You won't get continuity between the input and output, thats normal.
I got 232 and 1. Didn't get .000. So, that's good news I guess. Next to find out which is the reverb driver tube.
Cheers.
- Molly
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Re: Testing / Fixing a Reverb Tank
Looked at the tubes. Don't know which one is the reverb driver (can't find that info online for the Studio Pro Plus 35 - still looking) but did note that one tube had been swapped out. The TR website says the reverb tube should be a 12AT7 but at the moment they're all 12AX7. Could it be that this tube is the wrong one for for the reverb and that that's the reason it's not working?sizzlingbadger wrote:Measure the input and output resistance is the first step. You won't get continuity between the input and output, thats normal.
Thanks again all.
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- Conway
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Re: Testing / Fixing a Reverb Tank
The one you have circled in V4 is the tremolo driver and it should be 12AX7WA (high current tube).