Crate GX-212 Need Reverb Tank Part Number

[hbar223]

I have a Crate GX-212 Amp that needs a new reverb tank. I pulled it and there is no stamping number on it anywhere. All is says is "Belton" . I checked the AES website, but without a number, I cant track down the correct tank. If anyone has this info, I would be grateful !

[Jazz P Bass]

Are you sure the tank is at fault?
Did you check the I/O coils for continuity with an ohm meter?
What needs to be identified is:
- the length of the tank
- the number of springs
- the DC resistance of the input coil
- is the input grounded or not
- the DC resistance of the output coil
- is the output grounded or not
- the mounting position
The unknown will be decay length

[hbar223]

Yes, I am sure the tank is at fault. It has a broken spring. It has 2 springs, is 9 1/4 inches long and is mounted in the bottom rear corner of the amp. As far as checking resistance, I dont think that would work since it has a broken spring. Thanks for your reply !

[Jazz P Bass]

Uhmm.
The spring is not the resistance element.
Measure the input & output jacks, see what you get.
Then we can pick a pan.

[hbar223]

The input measures 27 ohms. The output measures 205 ohms.

Would you also know where I can buy a pot for this Crate ? The number stamped on it is 70-103-61. I have looked around the internet and havent been able to find one. Thanks for your help !

[Jazz P Bass]

Are you getting any reverb from the amp?
Does it make a crashing noise at all with the reverb pot at 10 & shaking the pan?
The coils having resistance say it should do something.
You may have reverb circuit issues.
Last item on the list.
Measyre the resistance from the input jack outer shell (the "ground" pin) to the pan.
Is there continuity?
Then do the same for the output jack.
Now we can get a part number.

[hbar223]

Resistance measuring it that way is .2 on the output, and 0 on the input. This tank has a broken spring, so I assumed it needed replacement.

[Jazz P Bass]

Didn't answer the question of does the reverb try to work at all?
With both coils showing good & one spring missing, the rvb tank should do something.
I would suggest getting in touch with Accutronics for the correct part number.
(The DC resistance measuremnet does not equate to ther charts)
Digit #1 :"#9 Tank"
Digit #2 :Input 27 ohms
Digit #3: Output 205 ohms
Digit #4: Decay Time: unknown (2 is in the middle 2 seconds)
Digit #5: Connectors: "A" input grounded: output grounded
Digit #6: "1" No Lock /Not Applicable
Digit #7: Mounting Position : Per Amplifier
Link: ::::::::: Accu Bell Sound Inc :::::::::

[J M Fahey]

You said it was a "Belton", not an Accutronics.
And the valid resistance is what was originally measured, 27 and 205 ohms.
The essential short measured from outer RCA contact to frame or ground means that input and output have one side grounded, they are not "floating·, nothing else.
So you should get into the "Belton" website and pick an approppriate tank which has:
* 2 springs
* 27 ohms DC inputrecsistance
* 205 ohms output resistance
* same length
* same case
* same connectors
* mounting compatible with the original one, which he already knows (vertica/horizontal/... etc.)
With that model numbered, it can be ordered from a regular supplier.

[52 Bill]

You're both right, I guess. Didn't Belton just buy Accutronics?

If you look at the schematic for this amp, the reverb tank needs to have an isolated input jack and a grounded output jack. I think the "0" that he gave you was really an infinite or no reading, not zero ohms.