bias pot

Marshall Amp Discussion

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menger66
Posts: 263
Joined: Mon Oct 07, 2013 10:21 pm

bias pot

Post by menger66 »

How would i solder in this bias pot, its 50k and it a jtm45 circuit, its the only on i have on hand. mark
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Firestorm
Posts: 3033
Joined: Fri Jan 25, 2008 7:34 pm
Location: Connecticut

Re: bias pot

Post by Firestorm »

Smart way is to wire it as a rheostat with the load resistor between wiper and the ground side (paralleling the pot resistance). That way if the wiper fails, the negative voltage increases protecting the tubes.
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