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Re: Repair [message #28521 is a reply to message #28494]

Tue, 12 April 2022 10:30

chicagobill
Messages: 2006
Registered: April 2003

Senior Member

Most Kustom amps used a tank with the input and output grounded. The correct way to test to see which tank should be used in your amp, would be to test the ground connections on the RCA jacks mounted to the pc board.

There are two jacks, one for send and one for the return. Normally the return jack has a connected ground circuit, meaning that the shell part of the jack is directly connected to the ground trace on the pc board. Usually the send jack is not directly connected to the ground circuit and therefore needs to be connected to the circuit by the ground connection inside the reverb tank.

Unplug the tank from the PC board. Take your ohmmeter and read the resistance from both RCA jacks shell connections and see if one or both are connected to the ground (chassis) circuit. If both are connected to ground, then your tank should be insulated input grounded output. If only the return jack is connected to ground, then both jacks should be be grounded.

All of this information is only for the older plexifront amps. The slant metal front amps of the 70's used an IC chip to drive the tank as part of its feedback loop, and therefore need an isolated input jack.

So long story short, in my opinion you have the correct tank.

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[Message index]

		Repair By: stevem on Wed, 06 April 2022 10:12
		Re: Repair By: NLKustom on Wed, 06 April 2022 17:29
		Re: Repair By: stevem on Thu, 07 April 2022 07:27
		Re: Repair By: NLKustom on Thu, 07 April 2022 16:25
		Re: Repair By: NLKustom on Thu, 07 April 2022 18:35
		Re: Repair By: NLKustom on Thu, 07 April 2022 19:12
		Re: Repair By: stevem on Fri, 08 April 2022 11:27
		Re: Repair By: NLKustom on Fri, 08 April 2022 18:45
		Re: Repair By: rodak on Fri, 08 April 2022 21:19
		Re: Repair By: stevem on Sat, 09 April 2022 10:11
		Re: Repair By: NLKustom on Sat, 09 April 2022 11:14
		Re: Repair By: NLKustom on Sat, 09 April 2022 16:57
		Re: Repair By: stevem on Sat, 09 April 2022 17:14
		Re: Repair By: NLKustom on Mon, 11 April 2022 12:57
		Re: Repair By: NLKustom on Mon, 11 April 2022 15:37
		Re: Repair By: stevem on Mon, 11 April 2022 19:52
		Re: Repair By: NLKustom on Mon, 11 April 2022 20:52
		Re: Repair By: chicagobill on Tue, 12 April 2022 10:30
		Re: Repair By: NLKustom on Sat, 25 June 2022 21:22
		Re: Repair By: rodak on Sun, 26 June 2022 14:51
		Re: Repair By: stevem on Mon, 27 June 2022 05:38
		Re: Repair By: NLKustom on Thu, 21 July 2022 22:32
		Re: Repair By: stevem on Fri, 22 July 2022 16:25
		Re: Repair By: NLKustom on Sun, 25 September 2022 20:46
		Re: Repair By: stevem on Mon, 26 September 2022 07:11
		Re: Repair By: NLKustom on Tue, 27 September 2022 17:15
		Re: Repair By: stevem on Wed, 28 September 2022 06:52
		Re: Repair By: NLKustom on Thu, 29 September 2022 22:03
		Re: Repair By: stevem on Fri, 30 September 2022 11:27
		Re: Repair By: NLKustom on Fri, 30 September 2022 16:00
		Re: Repair By: stevem on Fri, 30 September 2022 20:05
		Re: Repair By: NLKustom on Sat, 01 October 2022 11:29
		Re: Repair By: stevem on Sat, 01 October 2022 15:11
		Re: Repair By: NLKustom on Fri, 07 October 2022 08:57
		Re: Repair By: stevem on Sat, 08 October 2022 12:05
		Re: Repair By: NLKustom on Sat, 04 March 2023 17:18
		Re: Repair By: stevem on Mon, 06 March 2023 06:48
		Re: Repair By: NLKustom on Wed, 08 March 2023 10:05
		Re: Repair By: NLKustom on Wed, 08 March 2023 18:01
		Re: Repair By: rodak on Thu, 09 March 2023 14:35
		Re: Repair By: NLKustom on Sat, 11 March 2023 12:21
		Re: Repair By: stevem on Sat, 11 March 2023 15:24
		Re: Repair By: NLKustom on Tue, 14 March 2023 13:44
		Re: Repair By: chicagobill on Wed, 15 March 2023 12:13
		Re: Repair By: NLKustom on Wed, 15 March 2023 21:50
		Re: Repair By: NLKustom on Tue, 21 March 2023 12:13
		Re: Repair By: NLKustom on Thu, 05 October 2023 18:14
		Re: Repair By: stevem on Thu, 05 October 2023 18:30
		Re: Repair By: NLKustom on Thu, 05 October 2023 19:19
		Re: Repair By: NLKustom on Fri, 06 October 2023 09:03
		Re: Repair By: stevem on Fri, 06 October 2023 13:05
		Re: Repair By: NLKustom on Sat, 02 March 2024 14:15
		Re: Repair By: stevem on Sat, 02 March 2024 15:03
		Re: Repair By: NLKustom on Sat, 02 March 2024 16:40
		Re: Repair By: stevem on Sun, 03 March 2024 05:21

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