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Title: Phase 90 not phasing
Post by: Sody54 on June 20, 2007, 03:23:41 PM

Well, I was going to try and have the first pedal related post..oh well...

I've got my phase 90 up and running. I seems to have a problem somewhere though. The only phasing I can get out of it is when I adjust the trim pot. It won't do it on it's own. I had to make a couple of substitutions on my build. First was the 5.1 zener. The closest I had was a 6.2. The second was the 4125, I used a 3906. I also used J201's.

Any ideas out there in this fresh new landscape?

Thanks

Title: Re: Phase 90 not phasing
Post by: Toney on June 20, 2007, 03:32:21 PM

Try a lower Zener/ test the Fets for a low voltage matched group...the trick is getting a 'em with Vgs(off) of less that 3v.
I think the original Zeners were more like 3.3v..so yeah, I'd definitely start there.

Title: Re: Phase 90 not phasing
Post by: Sody54 on June 20, 2007, 04:01:37 PM

Thanks, I'll try that. I used the 6.2V because it was the lowest one I had. Guess I need to go find some more.....Have to build me an FET tester now too I guess.

Thanks for the tips.

Title: Re: Phase 90 not phasing
Post by: KarenColumbo on April 05, 2021, 02:53:47 AM

"Karen was here"

Title: Re: Phase 90 not phasing
Post by: jimilee on April 05, 2021, 05:43:25 PM

Are the j201s matched? I'm interested to see if you can get it working. Those are a considerably higher output tranny the 5457s or the 5952s.

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DIY Stompboxes => Building your own stompbox => Topic started by: Sody54 on June 20, 2007, 03:23:41 PM