Any problems using these fets in a phaser build?

Started by Earthscum, February 01, 2011, 11:07:10 PM

Previous topic - Next topic

Earthscum

I ordered ten 2SK117 GR fets awhile back, and just got around to measuring them.

I used the Improved JFet Tester. The fets tested:

4.09

4.14
4.15

4.19

4.21

4.24
4.24

4.26
4.27
4.27(4.28)

So, I assume that any I put together would be ok in the group they are in for a typical phaser, but obviously I don't have any groups of 4, or 6 (HA!). How would I decide which fets to pick out? My instinct would be to use the 2 pairs (4.24/4.27), and keep them together in the stage pairs.

Can I select 2 pairs out of this set if I want a stage pair to sweep slower or faster than the other? Does this work? And, if so, what would be a recommended spread to experiment with? Looks like I have 3, possibly 4 pairs to play with here.
Give a man Fuzz, and he'll jam for a day... teach a man how to make a Fuzz and he'll never jam again!

http://www.facebook.com/Earthscum

petemoore

  There are probably ways to measure in circuit to see if..
  It matters which circuit and whether the phase sound is good.
  It was the ph45 that actually phased just fine even with the random J201's I had on hand [+ an amazing amount of swapping.
Convention creates following, following creates convention.