Search found 1170 matches

by chicago_mike
05 Sep 2019, 22:58
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Roland - AP-7 Jet Phaser [schematic]
Replies: 68
Views: 39536

Re: Roland - AP-7 Jet Phaser [schematic]

I remember reading some builders had issues with the sweep range. Either bottoming out or not getting the full sweep.

I keep thinking that could be fixed if I can get measurements while the pedal is operational, but I would want to know what to measure.
by chicago_mike
04 Sep 2019, 18:05
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Roland - AP-7 Jet Phaser [schematic]
Replies: 68
Views: 39536

Re: Roland - AP-7 Jet Phaser [schematic]

Oh yeah! 10K setting for the vgsOff! :slap:

I guess the spread could be worse! But basically any decent modern fet would suffice? 2N5457 or something like that? I have to check the pdf's.
by chicago_mike
03 Sep 2019, 18:20
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Roland Jet Phase incoming!
Replies: 10
Views: 4005

Re: Roland Jet Phase incoming!

Okay I posted my initial FET measurements. Only for the 8 phasing FETS right now.

When I get more time, I take measurements of the other fets
by chicago_mike
03 Sep 2019, 18:18
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Roland - AP-7 Jet Phaser [schematic]
Replies: 68
Views: 39536

Re: Roland - AP-7 Jet Phaser [schematic]

Q5 seems to be the only one "off" of the groups value(s).

I'll recheck this week if I have time.
by chicago_mike
03 Sep 2019, 18:15
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Roland - AP-7 Jet Phaser [schematic]
Replies: 68
Views: 39536

Re: Roland - AP-7 Jet Phaser [schematic]

Here are my vgsoff and vgsM readings for the 8 2SK30A's Top of pcb fets Q7 1.05 off 3.33 m Q6 1.09 off 3.39 m Q5 1.23 off 3.46 m Q4. 1.08 off 3.35 m Bottom fets Q8. 1.15 off 3.35 m Q9 1.15 off 3.26 - 3.37 ? Q10 1.10 off 3.33 m Q11 1.18 off 3.33 m I don't have time right now to get more measurements,...
by chicago_mike
25 Aug 2019, 22:45
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Pigtronix Mothership II ( Small Unit )
Replies: 9
Views: 2814

Re: Pigtronix Mothership II ( Small Unit )

Exactly , thats why after putting it back together I kinda said fuck it Im not opening it up again! :mrgreen:
by chicago_mike
25 Aug 2019, 15:34
Forum: Parts Sourcing & Trading
Topic: What companies do small pub runs
Replies: 7
Views: 2554

What companies do small pub runs

I want to get a small run of PCBs made and can only remember seeedstudio.. :slap:

Who else is out there?
by chicago_mike
22 Aug 2019, 16:09
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Roland Jet Phase incoming!
Replies: 10
Views: 4005

Re: Roland Jet Phase incoming!

breadboarding an Arduino fet tester for this. Should have the jets testedasap!
by chicago_mike
18 Aug 2019, 14:45
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Roland Jet Phase incoming!
Replies: 10
Views: 4005

Re: Roland Jet Phase incoming!

Cool.

I should test ALL fets in the phase section yes? Not just like 2 - 4 ?
by chicago_mike
18 Aug 2019, 00:05
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Roland Jet Phase incoming!
Replies: 10
Views: 4005

Re: Roland Jet Phase incoming!

I would love to get the specs of the matched JFETs! Vgs(10k), Vgs(off) and Idss if you’re able. I’m curious to see how the voltages match up with something more common like the Phase 90. I saw some taken from a unit awhile ago that were in the 0.7-0.8v range, which seemed really low to me - so I’m ...
by chicago_mike
07 Aug 2019, 15:32
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Pigtronix Mothership II ( Small Unit )
Replies: 9
Views: 2814

Re: Pigtronix Mothership II ( Small Unit )

I saw that and just went okay, this is either a dsp, micro controller? or some kind of analog freq translator chip?

But I haven't googled anything yet.
by chicago_mike
05 Aug 2019, 22:39
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Pigtronix Mothership II ( Small Unit )
Replies: 9
Views: 2814

Re: Pigtronix Mothership II ( Small Unit )

Here is a link to the zip file with contains all the images I have of the guts!!

If someone else wants to post all the piccies, by all means! Im done taking it apart though, so no more from me. :block:
http://michaelstram.com/stompboxes/pigtronix/
by chicago_mike
25 Jul 2019, 19:30
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Pigtronix Mothership II ( Small Unit )
Replies: 9
Views: 2814

Re: Pigtronix Mothership II ( Small Unit )

AH SHIT!! I forgot! :slap:

Posting later today.
by chicago_mike
10 Jul 2019, 15:29
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Pigtronix Mothership II ( Small Unit )
Replies: 9
Views: 2814

Re: Pigtronix Mothership II ( Small Unit )

I promise to start getting the pics posted! its a 3 pcb inside a tiny box effect so I want to be super careful with disassembly.
by chicago_mike
27 Jun 2019, 14:18
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Pigtronix Mothership II ( Small Unit )
Replies: 9
Views: 2814

Pigtronix Mothership II ( Small Unit )

Just gone one of these off Reverb for super cheap! I'll be posting over the weekend the pics!
by chicago_mike
27 Jun 2019, 14:07
Forum: Modern Stompbox Effects (1975 - ...)
Topic: MI PollyAnna Octave Fuzz
Replies: 6
Views: 1880

Re: MI PollyAnna Octave Fuzz

I'll try to get better PCB shots over the weekend!
by chicago_mike
27 Jun 2019, 14:05
Forum: Modern Stompbox Effects (1975 - ...)
Topic: MI PollyAnna Octave Fuzz
Replies: 6
Views: 1880

Re: MI PollyAnna Octave Fuzz

This thing is janky!!! Needs a LOT of cleaning!