Matching JFETs

[foozertone]

Can someone hip me on how to match JFETs? I saw it on geofx but I couldn't visualize how to build it

thanks

Jeffrey

[killerkev]

Try a search and wait for little reply.. I'm still wondering why my "improved Jfet matcher" doesn't work...

http://www.diystompboxes.com/smfforum/index.php?action=search2

[mac]

If you have trouble try this, not as good as GEO matcher but maybe helpful.
Bias your fets as buffers, that is, 1M from base to gnd, drain to Vcc, a resistor R from source to gnd.
Use different values of R, say 1k, 5k and 10k for each fet. Measure voltage drop across R and write it down for each fet. You can get a close idea if they are matched or not.
And socket your fets

mac

[killerkev]

Try this link:

http://www.diystompboxes.com/smfforum/index.php?topic=66983.0

[killerkev]

Any luck?

[foozertone]

Thanks for your help/ I think I'm gonna match em by ear. I was just curious about it.

Thanks

Jeffrey