| net-david |
I just purchased a used Conrad Johnson MV55 amp. I have read a lot about the tride mode mod CJ can perform. Since I ALWAYS have to open up everything, I had a look inside and found what I think are simple jumpers to switch the mode from ultralinear to triode! Can anyone confirm this? Here is a pic:
Here is a hi-res pic if you need it:
BIG jumper pic
There is another pair of jumpers for the other channel. The dealer I bought the amp from was willing to do the mod for a charge, but I would rather be able to experiment. Somewhere I have some info for doing this to the old EICO amp I used to have.
Thanks,
David |
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| SHiFTY |
Get yourself a basing diagram for an EL34 (remember it is viewed from underneath.)
You will find in ultralinear mode, G2 is connected to a winding on the output transformer. In triode mode, it is connected to the anode via a low value resistor (100 ohm or so).
Check that this is the case and then break out your soldering iron. Should take you 15 minutes at the outside... |
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