Search found 1067 matches

by Manfred
11 Jan 2021, 19:06
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Binson e4t feedback
Replies: 11
Views: 506

Re: Binson e4t feedback

I found the following circuit diagram of the ECOREC 2 in tube technology in which some is noted.
I think its circuit structure was probably transferred to the semiconductor version.
I will have a look at it.
BinsonEcorec2_1.jpg
by Manfred
10 Jan 2021, 09:44
Forum: Boutique Stompboxes dissected...
Topic: JHS Morning Glory V4
Replies: 21
Views: 3166

Re: JHS Morning Glory V4

In the above circuit with the LM833 IC the circuit to generate the half voltage and the bias resistor to the positive input of the OP-Amp are missing.
HalfVoltagBias.jpg
by Manfred
10 Jan 2021, 09:26
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Binson e4t feedback
Replies: 11
Views: 506

Re: Binson e4t feedback

I would say that the number of repeats depends on the level of the feedback signal. This would have to be increased by increasing the gain of the feedback stage or the amount of feedback signal in the mixer circuit. The schematic is difficult to read as there are very few annotations on the componen...
by Manfred
09 Jan 2021, 19:41
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Böhm- Trickverzerrer [schematic]
Replies: 40
Views: 9624

Re: Böhm- Trickverzerrer [schematic]

BTW, Manfred: perhaps you must check the connection of DISKANT potentiometer in your board, according to this new diagram ? I have this original circuit diagram already for a long time this was attached with the purchase of my trick distortion. The circuit of the treble control is shown incorrectly...
by Manfred
08 Jan 2021, 00:26
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Böhm- Trickverzerrer [schematic]
Replies: 40
Views: 9624

Re: Böhm- Trickverzerrer [schematic]

I found a bunch of SC207 transistors in the box of the Trickverzerrer, I obviously bought them back then after I bought the unit, I didn't remember since that was a long time ago. But anyway I am glad about it. The SC207 has the same data as the SC206 with the difference that this one is selected fo...
by Manfred
07 Jan 2021, 14:01
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Böhm- Trickverzerrer [schematic]
Replies: 40
Views: 9624

Re: Böhm- Trickverzerrer [schematic]

I think you need the power filter cap after the 270ohm resistor not before, other than that it looks the same as mine in terms of components in the right places. If it's a componet value issues that is making it not work maybe raise the value of the resistor going been Q1 base and Q2 emitter. The v...
by Manfred
05 Jan 2021, 23:55
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Böhm- Trickverzerrer [schematic]
Replies: 40
Views: 9624

Re: Böhm- Trickverzerrer [schematic]

Here is the schematic of my device.
It does not work, after the repair I will make some measurements.
BoehmTrickverzerrerSchematic.JPG
GA101 If_VF.jpg
by Manfred
05 Jan 2021, 17:03
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Böhm- Trickverzerrer [schematic]
Replies: 40
Views: 9624

Re: Böhm- Trickverzerrer [schematic]

In addition, the shown circuit of the treble control in the schematic is wrong.
I meant the "diskant" control, this is shown correctly in the hand drawn circuit diagram of TWSpedals.
by Manfred
05 Jan 2021, 01:48
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Böhm- Trickverzerrer [schematic]
Replies: 40
Views: 9624

Re: Böhm- Trickverzerrer [schematic]

Here is the PCB layout, the schematic will follow soon.
I found some differences, R3 = 2k2, P1 = 25k,
R6 = 15k and D1 = GA101 in my version of the device.
In addition, the shown circuit of the treble control in the schematic is wrong.
BoehmTrickverzerrerLayout.JPG
by Manfred
02 Jan 2021, 23:23
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Böhm- Trickverzerrer [schematic]
Replies: 40
Views: 9624

Re: Böhm- Trickverzerrer [schematic]

Now I have opened the case, the previous owner had exchanged the transistors T1 and T2 against BC109C, T3 has the imprint F18 C-1. At the right lower corner of the board, the conductor track and soldering eye are corroded obviously once the battery had leaked. I have a PCB clone in work soon follows...
by Manfred
01 Jan 2021, 17:27
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Biyang Tonefancier Blue BL-8
Replies: 17
Views: 1473

Re: Biyang Tonefancier Blue BL-8

Renegadrian wrote: 01 Jan 2021, 01:26 small correction on the schem, gain is 100k linear not log. please change accordingly.
The potentiometer type I have changed circuit diagram above.
by Manfred
31 Dec 2020, 23:29
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Böhm- Trickverzerrer [schematic]
Replies: 40
Views: 9624

Re: Böhm- Trickverzerrer [schematic]

I bought a Trickverzerrer years ago, forgot about it and never touched it. I remembered it again through this thread. I took a few snapshots of it, will open it the next few days and trace. Trickverzerrer1.jpg Trickverzerrer2.jpg Trickverzerrer3.jpg Trickverzerrer4.jpg Trickverzerrer5.jpg Trickverze...
by Manfred
31 Dec 2020, 18:50
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Biyang Tonefancier Blue BL-8
Replies: 17
Views: 1473

Re: Biyang Tonefancier Blue BL-8

Here the verified layout and the verified circuit diagram.
Biyang ToneFancier Blue BL-8 Layout.JPG
Biyang Tonefancier Blue BL-8 Schematic.JPG
by Manfred
31 Dec 2020, 15:51
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Biyang Tonefancier Blue BL-8
Replies: 17
Views: 1473

Re: Biyang Tonefancier Blue BL-8

Renegadrian wrote: 31 Dec 2020, 14:53 Right, I wouldn't read those damn resistors, I just measured with MM.
The previous image I uploaded has been updated.

Guess I'll transform it into a grey dod 250, it should be quite easy.
Thanks a lot!
by Manfred
31 Dec 2020, 14:49
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Biyang Tonefancier Blue BL-8
Replies: 17
Views: 1473

Re: Biyang Tonefancier Blue BL-8

Did you read my previous post!? Yes I did, you wrote in the previous post: Got a problem with 1/8 metal resistors, quite difficult to read for me, guess it will be easy for others to complete the schem. Therefore I wrote: Can you please measure the values of the potentiometers and the resistors? I ...
by Manfred
31 Dec 2020, 06:57
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Biyang Tonefancier Blue BL-8
Replies: 17
Views: 1473

Re: Biyang Tonefancier Blue BL-8

Renegadrian wrote: 30 Dec 2020, 23:52 gain is b100k and volume is b10k
Thanks, are the resistance values correct, have you already checked them?
by Manfred
30 Dec 2020, 23:38
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Biyang Tonefancier Blue BL-8
Replies: 17
Views: 1473

Re: Biyang Tonefancier Blue BL-8

This pedal is similar to the FAME Slasher DS-10, so I just had to edit its schematic. https://www.freestompboxes.org/viewtopic.php?f=1&t=30326&p=278466&hilit=Fame+Slasher#p278466 Can you please measure the values of the potentiometers and the resistors? BiyangTonefancierBlueBL-8Layout_2....
by Manfred
30 Dec 2020, 20:17
Forum: Pedal Debugging & Troubleshooting Support
Topic: led weirdness in mxr m89
Replies: 12
Views: 585

Re: led weirdness in mxr m89

Maybe you have a high contact resistance in the chain due to a bad or broken solder joint, which can be responsible for this high voltage drop.
by Manfred
30 Dec 2020, 20:10
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Biyang Tonefancier Blue BL-8
Replies: 17
Views: 1473

Re: Biyang Tonefancier Blue BL-8

I made this PCB clone for tracing, can you please put the component values in the picture with the components.
Biyang Tonefancier Blue BL-8 Layout.JPG
Biyang Tonefancier Blue BL-8 Component Side.jpg
by Manfred
28 Dec 2020, 10:20
Forum: Boutique Stompboxes dissected...
Topic: Loundsberry Nigel Touch Overdrive Traced [traced]
Replies: 18
Views: 1412

Re: Loundsberry Nigel Touch Overdrive Traced [traced]

The potentiometer in series with the clipping diodes corresponds to the saturation control on this website:
http://www.muzique.com/lab/sat.htm
I think the value here is also B10k.