Arion SPH-1 - Stereo Phaser  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.

Re: Arion SPH-1 - Stereo Phaser

Postby juice2 » 08 Feb 2017, 14:29

FloPoeKo
keep us informed about your research on this phaser. I'm also interested in modding this one. Mine has an issue of uneven phasing. Maybe its because of the LFO.
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Re: Arion SPH-1 - Stereo Phaser

Postby FloPoeKo » 10 Feb 2017, 14:33

A quick update on the possible mod-values for the capacitors and their paired resistors the phase stage (all µF except where noted):
One might look up the respective schematics for more changes in the phase stage (Resistors, etc.)

____________ C7_______C9_______C12_______C19____
Orig. Arion .0082 .0082 .0082 .0082 R: 10K
Phase 90 .047/.05 .047/.05 .047/.05 .047/.05 R: 10K
Ibanez PT .047 .047 .047 .047 R: 10K
Univibe (UV) .015 .022 470pF .0047 R: ?K
Stinkfoot UV .015 .22 .047 .047 R: 10K
Wampler UV 0.1 .01 .022 .22 R: 10K
Small Stone .0068 .0068 .0068 .0068 R: 27k?
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Re: Arion SPH-1 - Stereo Phaser

Postby juice2 » 20 Feb 2018, 21:52

Just noticed that Arion phaser is close to the Boss PH-1r.

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FloPoeKo (06 Mar 2018, 20:01)
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