Search found 356 matches

by Fender3D
12 Aug 2020, 15:43
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Chorus 690 clock distorted output, not pulse
Replies: 15
Views: 368

Re: Chorus 690 clock distorted output, not pulse

That pulse waveform is correct for SAD512 since it has a clock divider which will provide the 2 out of phase clock signals internally.. It's the same waveform you'll find in MXR micro flanger or chorus of the same period. You might as well swap 4001 chip just in case, but I really think this is anot...
by Fender3D
04 Apr 2020, 02:08
Forum: Modern Stompbox Effects (1975 - ...)
Topic: DOD FX65B gut picture and voltages
Replies: 13
Views: 1308

Re: DOD FX65B gut picture and voltages

It works for me....
it's an old site try https://hammer.ampage.org/ https://hammer.ampage.org/
BTW if you google Mark Hammer you'll find lots of interesting articles
by Fender3D
03 Apr 2020, 10:02
Forum: Modern Stompbox Effects (1975 - ...)
Topic: DOD FX65B gut picture and voltages
Replies: 13
Views: 1308

Re: DOD FX65B gut picture and voltages

Mark Hammer @ https://archive.ampage.org/
read about chorus, flanger and analog echo here or @ DIYstompboxes
by Fender3D
02 Apr 2020, 18:23
Forum: DIY Stompbox designs
Topic: The complete BBD clock archive
Replies: 9
Views: 7154

Re: The complete BBD clock archive

DOD Chorus FX65B

Min clock 62.5KHz
Max clock 71KHz

Courtesy of hemisfeer
by Fender3D
02 Apr 2020, 18:18
Forum: Modern Stompbox Effects (1975 - ...)
Topic: DOD FX65B gut picture and voltages
Replies: 13
Views: 1308

Re: DOD FX65B gut picture and voltages

Thanks for checking.
Values are in line with other choruses, width of delay is a tad small I thought it was somewhat larger, but that is
by Fender3D
01 Apr 2020, 17:07
Forum: Modern Stompbox Effects (1975 - ...)
Topic: DOD FX65B gut picture and voltages
Replies: 13
Views: 1308

Re: DOD FX65B gut picture and voltages

DMM with Hz is fine,
just set speed at minimum and depth at max for a better reading.
by Fender3D
01 Apr 2020, 01:08
Forum: Modern Stompbox Effects (1975 - ...)
Topic: DOD FX65B gut picture and voltages
Replies: 13
Views: 1308

Re: DOD FX65B gut picture and voltages

If you can, please check min and max clock at MN3007's pins 2 and 6.

Thanks for the picture.
by Fender3D
12 Mar 2020, 16:43
Forum: Pedal Debugging & Troubleshooting Support
Topic: TC Stereo Chorus/Flanger voltages
Replies: 6
Views: 487

Re: TC Stereo Chorus/Flanger voltages

...in order to troubleshoot need the IC voltages from a functioning unit. I think you'll need more than just voltages... this is not a project to do "by numbers". you'll need to know how THESE chips work, or need to work, since there are few regulation points and bias voltages usually come from the...
by Fender3D
12 Feb 2020, 14:23
Forum: Pedal Debugging & Troubleshooting Support
Topic: EH Deluxe Electric Mistress Repair [Help Identifying Mods]
Replies: 6
Views: 264

Re: EH Deluxe Electric Mistress Repair [Help Identifying Mod

I think you'd better check and trace yourself what mods have been made there, instead of wasting time looking for "tutorials" that any idiot with an iron think it's worth to do to a pedal... Ralf's site is gold: follow his schematic and write down the mods made. BTW EH used to tack parts on bottom P...
by Fender3D
15 Jan 2020, 15:31
Forum: Announcements and Forum Rules
Topic: FORUM UPGRADES DONE: Friday 8th MAY 2020 09.00 CET - Saturday 9th 13.00 CET
Replies: 45
Views: 8386

Re: 2020 forum updates - work in progress

Thanks for your efforts in keeping this web site alive and ass-kicking, Modman
by Fender3D
14 Nov 2019, 14:40
Forum: Pedal Debugging & Troubleshooting Support
Topic: Experimenting with OCD = weird result
Replies: 28
Views: 683

Re: Experimenting with OCD = weird result

Any chance you have C6 shorted or leaking?
by Fender3D
16 Oct 2019, 14:56
Forum: Pedal Debugging & Troubleshooting Support
Topic: How to remove the popping noise when switching the reverb po
Replies: 4
Views: 198

Re: How to remove the popping noise when switching the rever

Long story short:
that switching will always make noise 'cause the vbias... biasing op-amp.

Either use series capacitors and a fixed bias resistor or use FETs to switch pots
by Fender3D
09 Oct 2019, 14:31
Forum: Pedal Debugging & Troubleshooting Support
Topic: MXR M-203 Stereo Flanger -> no modulation
Replies: 3
Views: 149

Re: MXR M-203 Stereo Flanger -> no modulation

Well... one of the trimmers is surely the bias control... it has only one correct setting...
the other trimmer might be feedback or clock, you should hear some change touching it!
by Fender3D
07 Oct 2019, 15:24
Forum: Pedal Debugging & Troubleshooting Support
Topic: MXR M-203 Stereo Flanger -> no modulation
Replies: 3
Views: 149

Re: MXR M-203 Stereo Flanger -> no modulation

Is there any clock on BBD's pin 1?

If you have it, you should check with signal probe if signal actually passes through BBD.
If I remember well, it should have a FET shorting signal to GND somewhere after BBD's output to "bypass" the effect.
by Fender3D
30 Jul 2019, 14:15
Forum: DIY Stompbox designs
Topic: BBD noise elimination
Replies: 6
Views: 1581

Re: BBD noise elimination

Filters' cutoff freq. MUST be lower than half the minimum clock freq.
In real world they'd better be lower than 1\3 clock freq.

They should be the same freq. also.

It's important not to feed too many high freq to BBD to reduce sampling errors, hence noise.
by Fender3D
29 Jul 2019, 17:00
Forum: DIY Stompbox designs
Topic: BBD noise elimination
Replies: 6
Views: 1581

Re: BBD noise elimination

Did you tune carefully your pre and post filters? In my flangers or choruses I found it's better have good (noiseless) preamp and mix stages than get insane squeezin' noise away. In flanger I found very effective a simple noise gate... but I'm used to '70 sounds... As I said you may find a good comp...
by Fender3D
29 Jul 2019, 10:47
Forum: DIY Stompbox designs
Topic: BBD noise elimination
Replies: 6
Views: 1581

Re: BBD noise elimination

Simply you can't avoid hiss with BBDs... it's a part of the sound (BTW why design it analog?). This because hiss comes from the approximated signal reconstruction due to sampling... You may add a compander, pre-emphasys and de-enphasys too, but you'll always get hiss on output. You might find a reas...
by Fender3D
01 Jul 2019, 21:39
Forum: Modern Stompbox Effects (1975 - ...)
Topic: DOD - FX30 Noise Gate [schematic]
Replies: 26
Views: 13601

Re: DOD - FX30 Noise Gate [schematic]

Who the hell is Andy?
by Fender3D
20 Jun 2019, 22:38
Forum: Pedal Debugging & Troubleshooting Support
Topic: Marshall 5210 opamp issue (HELP please) [SOLVED]
Replies: 2
Views: 174

Re: Marshall 5210 opamp issue (HELP please) [SOLVED]

Check if pin 3 is correctly connected to GND and check C11 and C12, the 2 caps going to pin2, don't leak.
by Fender3D
08 May 2019, 22:20
Forum: DIY Stompbox designs
Topic: Midi Switcher - Using Arduino
Replies: 21
Views: 4266

Re: Midi Switcher - Using Arduino

well.... that's an On\Auto switch. I used an On\Off\On toggle switch when I put my pedals in a rack enclosure 30 years ago to achieve the On\Off\Auto modes. I did it the very next day I forgot the switches unit at home and I had to hardwire some relays to play.... But that was just to use the unit m...