Vibe-ish PHase 90/180 [??]

[petemoore]

I'm looking at the GEO PHase 90, 180 PLUS schematic, and want to do one with a slightly Uni Vibish wobble.
 Is that a zener next to the Si diode [right bottom of schematic]?
 First I try matching Jfets. this makes 4...DAFT ... I was not able to match Jfets using the Improved Jfet Matcher or any of the others...hmmm.
 Anyway I build the Jfets matcher first and see if I can make heads or tails of the numbers.
 Also I'm wondering about those 10k's and how critical the ohmage is, whether using slightly off 10k's, would alter the sound and in what way..would measuring and looking for close resistance matching, or the opposite...looking for slightly looser specs,
 Use of 12k's would be nice so I wouldn't have to go get all the 10k it needs.
 Also what is the effect of adding phase stages ?

[RedHouse]

The capacitors are where you wanna get the Univibe 'vibe" from.

The Univibe used: .015uF - .22uF - .047uF - .0047uF where the Phase90 used the .05uF caps.

Univibe doing a psuedo comb-filter sweep thing.

[petemoore]

I'm assuming.
 These caps set the _____
 Sweep frequency range for that stage?
 Smaller cap = higher range ?

[petemoore]

OK I wired 115 socket lugs tonight into perf for the six stages of phaze...I guess that's called a 180? or is that eight...
 Anyway, I'm somewhere on this build, used alot of 10ks and sockets at least.
 1 I need to find out what type of diodes are used
 2 I need to get them
 3 I need to verify if I'm matching Jfets or not.
 Can someone give me a number youv'e seen when Jfet matching a J201 in the Improved Jfet matcher with a 9v battery or some 'reference' #? I can't tell if I've matched the 5 I have taken readings on or not.
 1.15v
 1.15
 1.14
 1.16
 1.08v
 They look better than the last three Jfet matcher build results, I wonder if these too are 'anomolous'....they seem kind of close for the first random 5.

[petemoore]

That helpful Redhouse !!!
 I think I may use some of my 'owni' numbers for capacitor values, something between the 90 and the Uni's phase stage capacitor values !!!
 I don't know if I'm matching J201's or not, 4 of 5 matching Very Closely seems a bit too good for my first successful matching session.  Maybe I'm lucky this time, maybe it's an illusion.
 the 1.14 numbers would be leaving a nice chunk of headroom though if these numbers are trustable !!
 So other than suitable parts retreival, I'm wiring this thing up !!!
 I need some kind of diodes, I don't know...one with a 'squiggley lin'e I guess.
 I still havent identified whats on the schematic at GEO...is that a zener.
 IS the other one on the left an Si
 Haunting questions and Possible Jfet matches make this a double-blind build !!! It sure would be nice to be able to verify more stuff on this advanced build.
 Identifying components on the schematic would probably help.

[RedHouse]

Sorry, I've never built the JFET matcher so I have no opinion.

[Torchy]

crp

[petemoore]

Well I did find a squiggly line like on the diode marking I think could be a xzerner under a monitor board. I have that component still in the alligator [so I can find the little thing]...hopefully it's what the phazer wants...

[Kleber AG]

That's weird and interesting subject...
I thought it was suposed to be

.015uF
.22uF
470pF *** :?:  :?:  :?:
.0047uF

?? :?:  :?:  :?:

Kleber AG

[petemoore]

Actually it probably is, for some at least.
 I used sockets for these 6 stage caps.
 Any ideas on what a 6 stage phazer sounds like compared to a 4 stage?
 Also, is it worth the trubbles to add even two more stages making this an 8 Stage?> I'm seeing a 'declining ratio" [1 is 1/2 of 2 or 100% more, 1 is 1/10 of 10 or 10% more] as more stages are added...hopefully this one'll get working soon and I can report what differences I feel there are between this one and a phase 45, phase 90, SS phazer, and EZ Vibe...