Selmer Thunderbird Mk 2 Reverb

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Selmer Thunderbird Mk 2 Reverb

Postby Pitchfork on Sat Mar 05, 2016 7:17 pm

Please could anyone with one of these either tell me the type of reverb tank fitted and/or measure the input impedance of the reverb tank?
I assumed that because it was driven bt a transformer that it would be a low impedance (Accutronics 'A') but the drive is weak so I suspect the tank should have a higher input impedance
Thank you
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Re: Selmer Thunderbird Mk 2 Reverb

Postby stratele52 on Sat Mar 05, 2016 9:31 pm

You'll read resistance not impedance if you mean with a meter ( ohmeter). Not the same .

A Fender reverb tank type 4AB3C1B I have at home;
2nd digit ; A is 8 ohms impedance , with meter is 1ohm resistance
3rd digit is 500 ohms impedance , with meter 250 ohms.

http://www.accutronicsreverb.com
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Re: Selmer Thunderbird Mk 2 Reverb

Postby Pitchfork on Sun Mar 06, 2016 9:06 am

I know that, I have a 4AB but it's not giving sufficient drive. Few people have the ability to measure impedance but I'll settle for resistance as it will be an indication of relative impedance. The output impedance if fine so it should be a 4 xB, the question is what is x
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