Tube Question for Diezel VHX

  • Thread starter Thread starter Raider-X
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Raider-X

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Hello -- My VHX started to act funny out of the blue. After warming up, it would start to make a pop / crack type sound about every second unless I turned the Standby off. The guitar tone completely cut out while it was doing this. After a minute or so I turned Standby back on and the issue would go away, for a few times. I started to try and track down what the issue is so I started pulling all the cables off 1x1 (Columbus, Midi, DI Out, Effects Loop) trying to see if this was the issue -- and then I noticed the Tube as I was doing this -- as the pop occurred, the tube would flash purple. I shut it off right away thinking something was awry. I did a little Googling and it sounded like perhaps my Tube was bad. So I took the back off, and I noticed that the Tube was sitting off the base by a few milimeters -- it was crooked for sure. So was another one... I flattened all 4 tubes, gently pushing them flush with the base. I've been doing test now for a solid hour and the issue has not replicated.

I recently moved my studio around 2 months ago -- is it possible that it somehow came off the base and just finally somehow got to the point where it wasn't seated correctly? Maybe from the speaker cab it sits on? Or slight bumping of the cab, etc? Could that little bit of being off base cause the issue I'm describing? The issue seems to be gone but I'm skeptical for how long or if this even makes sense -- I don't know a ton about amp electronics.....very little actually.

Appreciate any help here --

Thanks,

Raider-X
https://youtube.com/@raider-x?si=X_Ty7LLopVCSYJ9o
 
Sometimes the pins of the tubes can be slightly undersized/don't make full contact with the socket contacts (as you stated maybe tube wasn't seated). There's a lot of energy going through those tubes- they will shake and rattle and create audible pops in the signal if not making good contact with the socket contacts.

You might try another set or brand of power tubes if the problem persists.
 
Ultradeaf said:
Sometimes the pins of the tubes can be slightly undersized/don't make full contact with the socket contacts (as you stated maybe tube wasn't seated). There's a lot of energy going through those tubes- they will shake and rattle and create audible pops in the signal if not making good contact with the socket contacts.

You might try another set or brand of power tubes if the problem persists.
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Thanks Brother - it's been a solid week, at least 10+ hours of usage and the issue hasn't come back -- I'm hoping it truly was just a contact issue and that the tubes don't have any damage. The tone sounds killer like it always has, so just gonna keep pressing forward.
 
Raider-X said:
Thanks Brother - it's been a solid week, at least 10+ hours of usage and the issue hasn't come back -- I'm hoping it truly was just a contact issue and that the tubes don't have any damage. The tone sounds killer like it always has, so just gonna keep pressing forward.
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How do you like the VHX? Do you have any other Diezel amps you can compare it with?
 
Philosophy prof said:
How do you like the VHX? Do you have any other Diezel amps you can compare it with?
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I love it -- I get compliments and questions on my tone all the time -- it's a great amp. Completely blows my JVM410H out of the water -- the Marshall doesn't even compare imo.
I stream weekly with it on youtube, you can listen to one of my old streams to see how it sounds -- check it out if you like metal -- https://www.youtube.com/@Raider-X

RX
 
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