HH Valvesound Musician in for a repair

DSC_8552There is one problem!There is one problem!Caps replaced!Caps replaced!DSC_8555DSC_8556DSC_8557New caps in place twice the value and can withstand more voltage in the same size package as the dead onesNew caps in place twice the value and can withstand more voltage in the same size package as the dead onesDSC_8558DSC_8559DSC_8560DSC_8561DSC_8562Nice reverb tank!Nice reverb tank!DSC_8564Power amp has one power resistor burned out (can you see it) with the burned helix on itPower amp has one power resistor burned out (can you see it) with the burned helix on itrear of boardrear of boardDSC_8636replaced power resistor and the board worked... for a while.. when doing a full power test.. poof one old output transistor went...replaced power resistor and the board worked… for a while.. when doing a full power test.. poof one old output transistor went…photo of connections so I can quickly rewire with new transistorsphoto of connections so I can quickly rewire with new transistorsConnections to the output transistor (prior to disconnecting to test)Connections to the output transistor (prior to disconnecting to test)replaced these with some more rohbust modern npn power transistors and she was singing again,,replaced these with some more rohbust modern npn power transistors and she was singing again,,Last issue no reverb and power supply for preamp +16.5 -13.3 Volts... Turns out one op amp dead pulling the supply and not driving the reverb spring.. replaced and all goodLast issue no reverb and power supply for preamp +16.5 -13.3 Volts… Turns out one op amp dead pulling the supply and not driving the reverb spring.. replaced and all goodreverb board with recycled 741 op ampreverb board with recycled 741 op ampAll tested out on the bench and sounding great!All tested out on the bench and sounding great!DSC_8567DSC_8568DSC_8569DSC_8570Original wrapping material.. from Scotland..Original wrapping material.. from Scotland..

2 thoughts on “HH Valvesound Musician in for a repair

  1. Stewart, hi

    I have an H&H VS Bassamp that has died on me. I still have power, but nothing comes out. The last time I used it it had a horrendous buzz and very little guitar sound coming out.

    I can remove the silver chassis containing the electronics and post to you.

    Any thoughts?

    Cy Jones
    East Grinstead

    • It is probably something either on the power amp board or the output transistors. If it is not blowing fuses the main caps are probably OK. Yes please send to me and I will fix it for you. Just chassis is fine.

Leave a Reply

Your email address will not be published. Required fields are marked *

* Copy This Password *

* Type Or Paste Password Here *