Guyatone amp reverb tank replacement?

[amusicguy]

Hi there,
I have a Guyatone guitar amp I bought in the 70s that sounds good except for the reverb, which has a nasty ringing after effect. Does anybody here know if the tank can be replaced and if so, which unit I'd be able to use? I tend to favor the MOD type reverb units, although anything would likely sound better than what's in it now. If someone can help, please let me know. I'm a total newbie here. I'll go ahead and post the schematic to the schematic pages for possible future needs. Thanks!

What I know:
Guyatone "Zip" GA-200
Reverb tank is in the chassis, but I'd install RCA jacks for a new one
Tank isolated measures .2 ohms on both input and output sides (not impedance)
Single spring tank 9" long

[The Dude]

.2 ohms seems extremely low DCR (indicating low Z) for a transistor driven reverb. Are there any numbers on the tank itself? Aside from the "nasty ringing", is there a good reverb level? Is there any evidence it's been replaced (date code, other)?

[Helmholtz]

0.2k would be more likely.

0.2R is a short.

[amusicguy]

Thanks The Dude and Helmholtz for your questions.

You are right. I'm using a small analog ohmmeter with only one setting and the scale reads X1K, so 2000 DCR.
There are no markings on the tank other than an "OK" written with a sharpie.
Tank is original and although the reverb gain control works fine, it has always sounded thin and brittle to my ear. I have a fender blues jr. and a Quilter amp, both with reverb I like.

[amusicguy]

No, what was I thinking? that would be 200 ohms. .2 x 1000= 200
And the reading is clearly .2 on the meter after zeroing.
Sorry for the confusion

[Helmholtz]

0.2R x 1K = 200R?

[amusicguy]

Yes, does that make sense resistance-wise for this circuit? Sorry, I don't have any way to measure impedance.

[Helmholtz]

Yes, does that make sense resistance-wise for this circuit? Sorry, I don't have any way to measure impedance.

Yes.
Impedance of rev. transducers typically is around 10 times the DCR.

[The Dude]

See the chart on this page for approximate DCR readings for different impedance tanks.

https://www.studiosoundelectronics.c...erbdcchart.htm

You can use this information for help deciding on a replacement tank.

[g1]

A mod tank with FB impedance code would probably be the best sub., EB would probably work as well.
Check the ground scheme of the existing tank to see if either in or out (-) terminal is connected to tank case.