Search found 292 matches
- 18 Oct 2023, 23:56
- Forum: Boutique Stompboxes dissected...
- Topic: Red Witch - Empress Chorus Vibrato
- Replies: 6
- Views: 4713
Re: Red Witch - Empress Chorus Vibrato
I think take based on zombie chorus
- 13 Oct 2023, 04:57
- Forum: Modern Stompbox Effects (1975 - ...)
- Topic: PAL Fx JCM 800 Emulator [schematic]
- Replies: 73
- Views: 66038
Re: PAL Fx JCM 800 Emulator [schematic]
Hello. The source resistor for Q2 is 10K, and it's correct following the PAL800 schematic and the other JFET emulator, beacuse both come from the original JCM800 schematic. I guess I heard about replace Q4 with a 2N5458, but I think that's not a big issue. I know Dr. Boogie has a scaled tonestack, ...
- 13 Oct 2023, 04:47
- Forum: Modern Stompbox Effects (1975 - ...)
- Topic: PAL Fx JCM 800 Emulator [schematic]
- Replies: 73
- Views: 66038
Re: PAL Fx JCM 800 Emulator [schematic]
I'm sure that should work, but I checked a lot of time, every single part, replaced suspect ones, resoldered, measured, continuity... Thanks for the tip about the biasing, but, until the Mid mess up the voltage I can't do anything. Why you say "the problem is in the transistor"? Do you th...
- 10 Oct 2023, 20:55
- Forum: Modern Stompbox Effects (1975 - ...)
- Topic: PAL Fx JCM 800 Emulator [schematic]
- Replies: 73
- Views: 66038
- 10 Oct 2023, 20:53
- Forum: Modern Stompbox Effects (1975 - ...)
- Topic: PAL Fx JCM 800 Emulator [schematic]
- Replies: 73
- Views: 66038
Re: PAL Fx JCM 800 Emulator [schematic]
the problem is in the transistor. a few years ago I was inspired to emulate tube preamps using jfet, I collected all the circuits of known devices both with a buffer in front of the tone stack (Marshall, Vox, Laney, etc) and without a buffer (Orange, Peavey, Splawn, Mesa Mark etc). They all worked f...
- 30 Jul 2023, 00:59
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: Morning Glory problem with 2N5457
- Replies: 19
- Views: 1916
Re: Morning Glory problem with 2N5457
R18 reduces the gain of the jfet stage.CheapPedalCollector wrote: ↑27 Jul 2023, 19:45 I don't think R18 is correct either, it doesn't make any sense.
Josh himself has said that this circuit hasn't been accurately traced. Hopefully someone with a V3 can trace it correctly.
- 30 Jul 2023, 00:57
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: Morning Glory problem with 2N5457
- Replies: 19
- Views: 1916
Re: Morning Glory problem with 2N5457
Replace 22k resistor to 100k trimpot and biasing jfet.
- 28 Jul 2023, 23:33
- Forum: DIY Projects
- Topic: Introducing the Alternate Dimension: Flexible Dimension/Dual Chorus
- Replies: 15
- Views: 2968
Re: Introducing the Alternate Dimension: Flexible Dimension/Dual Chorus
There's a good analysis of this pedal in the Aion clone PCB build document at https://aionfx.com/app/files/docs/blueshift_documentation.pdf. I don't see a lot of opportunity for mods, everything is pretty tightly linked together and it requires some calibration to work well. the only useful mod (at...
- 18 Feb 2023, 20:24
- Forum: DIY Projects
- Topic: PUP: a host of Perfectly Usable Phasers [documentation]
- Replies: 54
- Views: 6849
Re: PUP: a host of Perfectly Usable Phasers [documentation]
The scheme is good because it does not require identical jfets. But, as far as I know, it can have clipping problems, just like jfets. It seems to me that it is more reasonable to replace CMOS and Jfets with a photoresistor + LED. You could try using OTA, but not like in the EHX Small Stone circuit...
- 12 Feb 2023, 12:55
- Forum: Modern Stompbox Effects (1975 - ...)
- Topic: Boss smd question
- Replies: 1
- Views: 336
- 11 Feb 2023, 20:16
- Forum: DIY Projects
- Topic: PUP: a host of Perfectly Usable Phasers [documentation]
- Replies: 54
- Views: 6849
Re: PUP: a host of Perfectly Usable Phasers [documentation]
The scheme is good because it does not require identical jfets. But, as far as I know, it can have clipping problems, just like jfets. It seems to me that it is more reasonable to replace CMOS and Jfets with a photoresistor + LED. You could try using OTA, but not like in the EHX Small Stone circuit ...
- 08 Apr 2021, 09:22
- Forum: Boutique Stompboxes dissected...
- Topic: Bogner - Ecstasy Red
- Replies: 69
- Views: 45492
Re: Bogner - Ecstasy Red
It’s really bs170?
Where j201 from picture?
Where j201 from picture?
- 03 Feb 2021, 18:35
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: U1226 Pedal Preamp Hiss
- Replies: 1
- Views: 592
Re: U1226 Pedal Preamp Hiss
1) I would start by replacing R12, R13, R14 with trimpots, try the standard 100K 2) the noise of the first channel is more noticeable, since the first channel is structurally brighter. 3) Between the gate and the ground, it is worth installing a small capacitor of 220p (imitation of the internal cap...
- 14 Jan 2021, 20:48
- Forum: Modern Stompbox Effects (1975 - ...)
- Topic: MXR M288 Bass Octave Deluxe [gut shots, tracing]
- Replies: 20
- Views: 8182
Re: MXR M288 Bass Octave Deluxe [gut shots, tracing]
What do you think is the point in doubling the tension? Will this have a positive effect on octave performance or tracking?
Or is it just to increase the dynamic range?
Or is it just to increase the dynamic range?
- 25 Oct 2020, 14:14
- Forum: Pimp-My-Cheap-Pedal
- Topic: Joyo Vintage Phase Gutshots
- Replies: 3
- Views: 1557
- 24 Oct 2020, 16:56
- Forum: Pimp-My-Cheap-Pedal
- Topic: Joyo Vintage Phase Gutshots
- Replies: 3
- Views: 1557
Re: Joyo Vintage Phase Gushots
what transistors are used here?
- 04 Sep 2020, 15:00
- Forum: Pimp-My-Cheap-Pedal
- Topic: Behringer VM1 Vintage Time Machine
- Replies: 109
- Views: 85975
Re: Behringer VM1 Vintage Time Machine
Hello. This circuit looks like an attempt to take the best of both worlds (I think Chase Bliss Tonal Recall was able to achieve this). We all know that DMM has excellent replay quality and built-in modulation. But reps can get overwhelmed. The boss has a high input impedance, which allows him to wor...
- 23 Aug 2020, 10:42
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: 3 Band Baxandall Calculator
- Replies: 2
- Views: 2310
Re: 3 Band Baxandall Calculator
I built it several times and simulated it several times.
3 bands are too many for this equalizer, the controls become dependent on each other (not very much, but noticeably).
I would consider other schemes.
3 bands are too many for this equalizer, the controls become dependent on each other (not very much, but noticeably).
I would consider other schemes.
- 06 Aug 2020, 10:38
- Forum: Printed/Published Online Designs
- Topic: Tap Tempo for BBD
- Replies: 2
- Views: 2517
Re: Tap Tempo for BBD
Another addition. I tested the LFOs of most flangers and noticed that they have a wider range than other effects. At least those that don't use the original watch. Interestingly, there are some interesting exceptions among deep-sounding flangers. 1) The Electric Mistress uses a non-inverting amplifi...
- 06 Aug 2020, 08:37
- Forum: Printed/Published Online Designs
- Topic: Tap Tempo for BBD
- Replies: 2
- Views: 2517
Re: Tap Tempo for BBD
OK I modulated the standard LFOs Most circuits have a range of no more than 4V between maximum and minimum values, which means that we can simulate normal LFOs well. The only exceptions are Flangers, which work without original watches. Perhaps this is the reason for the lack of commercial flangers ...