Wampler Plexi-Drive Question

[stringfellow_Hawke]

So, I started to build the Plexi-Drive and realized that I don't have any 10r resistors (doh!) and the closest value I have is a 330r. Any chance I can just omit this and replace it with a jumper?

[stringfellow_Hawke]

Screw it, I'm just gonna do it and see what happens.  

I'm selling a Pharaoh to a dude tomorrow and using the money to stock up on a bunch of components, so if it doesn't work or sounds bad, I'll have the right resistor soon enough.

[adstrum]

You use a piece of 28AWG wire and tie a knot in it

[induction]

The 10R is part of the power filtering.  You can omit it entirely if you use a battery or a regulated and filtered adapter.

If you replace it later, it may affect the biasing, so if it doesn't hum, just leave it alone.

This circuit relies on hand-selected J201's that give 4.5-5.0V on the drains with the given resistors.  The usual technique of swapping drain resistors for biasing will change the gain and EQ, and you'll get an inaccurate clone that sounds wrong.  Just swap out the J201's until you find ones that bias correctly.  Unfortunately, this requires you to buy lots of them.

[stringfellow_Hawke]

@adstrum - lol!

@induction - appreciate the response. I figured it was something along those lines. I'm only getting hum when I dime the volume and the gain at the same time, which is likely to never happen, so I'm not going to worry about it too much. It sounds pretty damn good!