How to diagnose which tubes need to be replaced

Tubes Asylum

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Posted by texanater (A) on April 6, 2021 at 08:10:47

Greetings All,

I'm a relative noob to tubes. I have a Herron VTPH-1 phono amp. I've had it for about 5 years. Recently the right channel developed a white noise rumble. I figured it was a tube and emailed the manufacturer who told me which one it was and had a section of his website that covered where/wht tubes to get.

So my question is more for the future. I assume if the left channel developed the same rumble I could figure which tube to change. But I don't know what what other symptoms would indicated problems with the other tubes. There are 4 12AX7W A/B, and one 12AT7WC. I imagine the 12ax7s are for RIAA correction and gain, not sure what the lone 12at7 does. But I don't know what I'm talking about. When it comes to electronics I am like a green belt in Karate, I know just enough to get my ass kicked.

Edit: Just FYI, I went ahead and bought a replacement set of tubes.

Nate

You can't cheat an honest man, never give a sucker an even break or smarten up a chump -- W.C. Fields

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Topic - How to diagnose which tubes need to be replaced - texanater 08:10:47 04/06/21 (13)

RE: How to diagnose which tubes need to be replaced - 6bq5 08:58:51 04/08/21 (0)

try this - Story 05:47:19 04/07/21 (1)

RE: try this - texanater 08:36:43 04/08/21 (0)

RE: How to diagnose which tubes need to be replaced - Uncle Mike 14:41:22 04/06/21 (1)

RE: How to diagnose which tubes need to be replaced - texanater 08:50:25 04/07/21 (0)

RE: How to diagnose which tubes need to be replaced - Mick Wolfe 08:44:59 04/06/21 (1)

RE: How to diagnose which tubes need to be replaced - texanater 09:39:28 04/06/21 (0)

RE: How to diagnose which tubes need to be replaced - Rocket_Powered 08:33:38 04/06/21 (5)

RE: How to diagnose which tubes need to be replaced - Alpha Al 17:47:38 04/06/21 (2)

+1. Yes, unfortunately the final tube tester become the amp or pre-amp. - Mick Wolfe 08:55:00 04/07/21 (0)

RE: How to diagnose which tubes need to be replaced - Mick Wolfe 08:49:31 04/07/21 (0)

RE: How to diagnose which tubes need to be replaced - texanater 09:41:48 04/06/21 (1)

RE: How to diagnose which tubes need to be replaced - Jonesy 11:41:42 04/07/21 (0)

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