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Faulty HRD ..help needed please

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BarneyBarney Frets: 628
in Amps
Just been to rehearsal again after thinking a new tube had fixed this fault but it seems as though it needs to heat up before it happens 



IV linked a video of the sound the fault makes ...any advice would be really appreciated...I didn't touch the inside of the amp even when off I don't know anything about other than to keep my fingers out..it was just visual to see iff I could see anything 
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Comments

  • Danny1969Danny1969 Frets: 11014
    That sounds like the large resistors that provide the low voltage supply  - that runs the effects loop and reverb buffers are suffering from bad joints ...very common on these amps 

    You can spot these resistors quite easily, they are the 2 white ones side by side 2 seconds into your video


    www.2020studios.co.uk 
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  • BarneyBarney Frets: 628
    Danny1969 said:
    That sounds like the large resistors that provide the low voltage supply  - that runs the effects loop and reverb buffers are suffering from bad joints ...very common on these amps 

    You can spot these resistors quite easily, they are the 2 white ones side by side 2 seconds into your video


    Thanks ...it seems as though it will need to go to a amp tech ...I tried swapping valves but just really the same ....I did notice the circuit board where the resistors are brown on the circuit board ... wondering iff it is just loose ....I think either way it won't be something I would be confident messing with 
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  • ICBMICBM Frets: 74494
    If it’s going to a tech, also ask for it to be set to 240V supply voltage - the factory setting is 230V - that makes them run cooler and more reliably as well, including these resistors not getting as hot.

    "Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski

    "Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein

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  • BarneyBarney Frets: 628
    ICBM said:
    If it’s going to a tech, also ask for it to be set to 240V supply voltage - the factory setting is 230V - that makes them run cooler and more reliably as well, including these resistors not getting as hot.
    Ok ...thanks I will do that ...IV just taken it in now so I will ask him to do that as well...Iv asked him to have a good check over it all 
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