Herbert Volume loss and Mid Cut Issue -solved-

  • Thread starter Thread starter glowe
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glowe

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Hello All,
Amp is experiencing volume loss in all channels, Normal volume for about 5 mins , then 50% loss in volume, When this happens the intensity knob on the Mid Cut does not have any effect on the sound of my Herbert , Mid Cut feature does engage and dis-engage with the switch and the level knob functions normal . When I rotate the Intensity nothing happens ,,,, Mid Cut does engage ,as there is change in tone , but no variability from the intensity knob. Can put amp on standby for a few mins ,and then turn back on .. volume will go back to normal ,,then a few mins later volume loss again ..Any idea's for what could be the problem ?? FYI- Tubes are Ruby BHT EL34's with less than 60 hours playing time --Cheers All
 
Although this has been solved long ago,, Just want to say THANX !!! to Peter and Jens for all their emails and help in this issue ,,, After the possibilty of maybe a re-tube and a possible trip down to Jens (before the unfortunate end of the relationship) ,,, I thought I would check the biasing as a starting point and found that it was not to spec ,, After re-biasing ,, The Herbert has been performing flawlessly with none of the issues !
 
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