Search found 91 matches

by armdnrdy1
14 Feb 2017, 21:03
Forum: Boutique Stompboxes dissected...
Topic: Catalinbread - Dirty Little Secret [traced]
Replies: 439
Views: 193656

Re: Catalinbread - Dirty Little Secret [traced]

If you are referring to taper for the Presence pot....I used a linear or 'B', taper....works fine!
by armdnrdy1
25 Jan 2017, 02:32
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: A/DA - Final Phase [schematic]
Replies: 22
Views: 17354

Re: A/DA - Final Phase [schematic]

I'm not sure which version you based your build off of....but this is the reissue frequency reading. I took frequency readings at the test point (pin 10) of the 4047. With all controls CCW and the Range control CW, I measured: min. 34kHz max. 537kHz The reissue CV is 15 volts. The original is 5 volt...
by armdnrdy1
18 Aug 2016, 21:42
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Musitronics - Mu-Tron - Flanger - C130 [schematic]
Replies: 76
Views: 35680

Re: Musitronics - Mu-Tron - Flanger - C130 [schematic]

Will, The descriptions of your problem, "they do not seem to work", "I am not getting any response" are very vague.

If you could be so kind as to expand on the problem you are encountering...maybe someone here can offer some suggestions.
by armdnrdy1
25 May 2016, 15:47
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Ibanez - FP-777 Flying Pan
Replies: 55
Views: 26901

Re: Ibanez - FP-777 Flying Pan

Thanks for that Bernardduur! I recently checked the factory schematic against available board shots. Are you sure that the (red-trace side) 470K between C27 & R21 goes to Vref2? I see the Vref2 trace running under the 470K, and the 470K connected to the ground side of uninstalled R20. Also…good ...
by armdnrdy1
19 Aug 2015, 19:30
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Octave Multiplexer [schematic]
Replies: 70
Views: 37015

Re: EHX - Octave Multiplexer [schematic]

I said I would post pictures of my Octave Multiplexer in another threat. I will do so naturally. But I feel a little stupid now that I googled it a bit. It's been traced already - and very well - factory schematic... http://topopiccione.atspace.com/PJ19EHOctaveMultiplexer.html Here are my pictures ...
by armdnrdy1
06 Aug 2015, 06:41
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Maxon - AD-900 MN3008 version [schematic]
Replies: 10
Views: 9019

Re: Maxon - AD-900 MN3008 version [schematic]

Just so I'm clear..the repeats are what sound "dark" to me with the AD-900 I actually did experiment with the filter values of the DM2. I built a daughter board for the AD-900 to switch different filter sections in.....it didn't work too well. For some reason that I don't understand...it c...
by armdnrdy1
21 Jun 2015, 21:32
Forum: DIY Stompbox designs
Topic: Isolated PSU project
Replies: 4
Views: 2900

Re: Isolated PSU project

If you can make it a +18/0/-18 supply it would have the capability of being regulated down to normally encountered bipolar supply voltages. +15/0/-15 or +12/0/-12 :wink:
by armdnrdy1
21 Jun 2015, 19:33
Forum: DIY Stompbox designs
Topic: Isolated PSU project
Replies: 4
Views: 2900

Re: Isolated PSU project

Looks good Mick!

I've found that for my purposes, having a few 18 volt outputs is very useful since many of my builds demand either a bipolar supply or 12-15 volts.
I usually regulate down to 15 volt and use a LT1054 charge pump to create the -15.
by armdnrdy1
20 Jun 2015, 15:17
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Colorsound - Flanger [schematic]
Replies: 10
Views: 6905

Re: Colorsound - Flanger [schematic]

Here is a preview of my progress with the board. Lacking trace side images, I used component side shots for reference for the component placement. There were two versions of the Colorsound Flanger. The schematics previously posted and this board layout reflect the second version which seems to have ...
by armdnrdy1
19 Jun 2015, 04:48
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Boss - CS-2 Compressor Sustainer [schematic]
Replies: 49
Views: 21307

Re: Boss - CS-2 Compressor Sustainer [schematic]

Google "BA662 vs BA6110 thread, again" this will show you how to replace the BA662 with a BA6110 and four transistors.

I have researched then implemented this retrofit in the Boss VB-2 circuit.
by armdnrdy1
17 Jun 2015, 17:43
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: SolaSound - Tonebender 1971 [schematic]
Replies: 30
Views: 12725

Re: SolaSound TB late '60 [pics, schematic] [schematic]

Why couldn't you have received a Colorsound flanger for repair? :slap:

I'm working on the board routing and....I could use a few trace side shots!
by armdnrdy1
17 Jun 2015, 00:48
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Elektronika - Synchro Wah [schematic]
Replies: 6
Views: 4603

Re: Elektronika - Synchro Wah [schematic]

I think it's a radio sending unit for KGB agents sent to infiltrate and spy on those dissident Rock and Roll musicians! :secret:
by armdnrdy1
15 Jun 2015, 15:54
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Maxon - AD900 Analog Delay [schematic]
Replies: 56
Views: 37818

Re: Maxon - AD900 Analog Delay [schematic]

So...that's what it sounds like after you messed with the trimmers?
You were warned! :slap:
by armdnrdy1
15 Jun 2015, 14:35
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Tycobrahe - Parapedal [schematic]
Replies: 97
Views: 58504

Re: Tycobrahe - Parapedal [schematic]

kymar wrote:I think you turned this thread in Pedal Debugging & Troubleshooting Support.
Was that really a necessary comment?

Are you the forum police?

:horsey:
by armdnrdy1
15 Jun 2015, 13:27
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Colorsound - Flanger [schematic]
Replies: 10
Views: 6905

Re: Colorsound - Flanger [schematic]

After I posted the redrawn schematics, I started working on identifying components from original board images to make a layout. While focusing my attention around the rotary switch, I noticed that the original drawing depicts the switching sequence as: Manual, Auto, ADT. That is incorrect. The origi...
by armdnrdy1
15 Jun 2015, 13:15
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Tycobrahe - Parapedal [schematic]
Replies: 97
Views: 58504

Re: Tycobrahe - Parapedal [schematic]

At this point....I'm out of ideas. I would get rid of the sockets for the resistor and diode. Solder those components to the PCB directly. There seems to be intermittent bias voltage issues at pins 3 and 5 of the op amps. Some voltage readings are in the ballpark and then next readings the bias is o...
by armdnrdy1
14 Jun 2015, 22:17
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Colorsound - Flanger [schematic]
Replies: 10
Views: 6905

Re: Colorsound - Flanger [schematic]

Here are the redrawn schematics: https://dl.dropboxusercontent.com/u/53299166/DIYstompboxes/Colorsound%20Flanger%20pg.1.jpg https://dl.dropboxusercontent.com/u/53299166/DIYstompboxes/Colorsound%20Flanger%20pg.2.jpg I verified as many components as possible from images available on the net. If you we...
by armdnrdy1
13 Jun 2015, 13:56
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Tycobrahe - Parapedal [schematic]
Replies: 97
Views: 58504

Re: Tycobrahe - Parapedal [schematic]

Okay...

You still have something going on.

The voltages from your reply @ 17:15 had the reference voltage at 2.9V...now it's down to 1.3V.

Pull the op amps and take voltages again.

Take a close up picture of the whole component side of the board.