2N5952 Matching Results

[mattthegamer463]

I hope I did this right... I built the JFET matcher in the link below, I think it worked properly.

http://www.geofex.com/Article_Folders/fetmatch/fetmatch.htm

High Resolution Results:

http://img.photobucket.com/albums/v321/mattthegamer463/DSC01266.jpg

Can anyone confirm these are reasonably correct?  I placed a star next to one set, and check marks next to another set that I think are the closest of the bunch.  Naturally, I need four for my Phase 90 build.

[R.G.]

They look reasonable to me.

I'd use the 1.84.... set (stars).


Go for it!

[mattthegamer463]

Thank you kindly. 

[Mark Hammer]

I ordered 50 2N5952s from Mouser, and came away with a couple of sextets matched within 20mv or so, and at least a half-dozen quartets similarly matched.  Hardly any "leftovers".  Pleasant surprise.

I'm pondering  something where there are, say, 8 swept stages and 2 fixed, with 2 onboard LFOs.  The 8 swept stages are all in line, and one would be able to assign a single LFO to them all, or sweep one set of 4 with LFOA and the other setwith LFO B.  I know I like sticking two phasers in series to decrease the periodicity.  This would be different, though, in some ways.  Two entire units in series simply duplicates the effect differently. Two unsync'd modulations of a single phase-shift path would result in a cumulative phase shift at frequency F that would be even less predictable.

[R.G.]

I'm pondering  something where there are, say, 8 swept stages and 2 fixed, with 2 onboard LFOs.  The 8 swept stages are all in line, and one would be able to assign a single LFO to them all, or sweep one set of 4 with LFOA and the other setwith LFO B.  I know I like sticking two phasers in series to decrease the periodicity.  This would be different, though, in some ways.  Two entire units in series simply duplicates the effect differently. Two unsync'd modulations of a single phase-shift path would result in a cumulative phase shift at frequency F that would be even less predictable.

Good idea. Maybe even make one of the LFOs have a random mode.

It would be interesting to compare this to two entire phasers with different LFOs, that is, each with a mix to "dry" at the end, but separated and in series.

[Mark Hammer]

Then I have to do my dual flanger experiment that I keep meaning to do.  I have a pair of Boss BF-1s that I have lifted the dry path on.  This allows one to function as a short time offset "dry" path, and the other as the swept delay that goes through-zero.  The intent is to harness them to a splitter/mixer combo to achieve various sorts of through zero arrangements, both periodic (one pedal fixed and the other swept) and unpredictable through-zero episodes (both swept at different rates).  But now that I think of it, they could also be patched in series and the true "clean" path run directly from splitter to mixer such that the wet path has two entirely independent time fluctuations that sum together.

Man, it's a REAL good thing I never indulged in drugs, because those experiments might set me back psychicly about 20 years!

Once I'm done that, I have to do a "theta processing" experiment and add 4 fixed stages of lagging phase-shift to the wet path like Jurgen Haible does.