I've recently picked up a late 70's Dynacord Eminent II amp, schematic here: http://www.peel.dk/Dynacord/pdf/Emin...ision) (2).pdf
The amp has no major issues, so I'm just going to renew the filter caps and bias trimmers and see if I can get some use out of it for low volume bass guitar gigs. The amp is a class AB2 circuit with 740V on the plates and 420V on the screens of the EL34s, claiming 80 watt RMS and 110 watt peak output.
It's running a pair of Hoges EL34 at the moment, which I gather are Siemens/RFT under another name and probably original to the amp. I'll try running it with the Hoges initially, though they may be quite well worn. If I want to replace those, which current production EL34 would be dependable at the voltage? Some recommend JJ, while others warn against them. I think the supplier I tend to use has Shuguang, EH, JJ or Winged C/Svetlana, though the Winged C are more expensive than the others. NOS are almost certainly more than I want to spend.
The amp has no major issues, so I'm just going to renew the filter caps and bias trimmers and see if I can get some use out of it for low volume bass guitar gigs. The amp is a class AB2 circuit with 740V on the plates and 420V on the screens of the EL34s, claiming 80 watt RMS and 110 watt peak output.
It's running a pair of Hoges EL34 at the moment, which I gather are Siemens/RFT under another name and probably original to the amp. I'll try running it with the Hoges initially, though they may be quite well worn. If I want to replace those, which current production EL34 would be dependable at the voltage? Some recommend JJ, while others warn against them. I think the supplier I tend to use has Shuguang, EH, JJ or Winged C/Svetlana, though the Winged C are more expensive than the others. NOS are almost certainly more than I want to spend.
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