Search found 22 matches

by Chewbacca
11 Aug 2017, 13:07
Forum: Boutique Stompboxes dissected...
Topic: Okko - Diablo Boost+ (goop pics!!) [traced]
Replies: 146
Views: 81039

Re: Okko - Diablo Boost+ (goop pics!!) [traced]

Did anyone try this polish copy of the Diablo? http://www.efekty-diy.pl/diablo.html I actually have managed to build the pedal just from copying the pictures of pcb on their web site and from reading their BOM. It worked perfectly! Highly recommended :-) I've had some of the Polish kits in for Repa...
by Chewbacca
11 Aug 2017, 12:58
Forum: Boutique Stompboxes dissected...
Topic: Okko - Diablo Boost+ (goop pics!!) [traced]
Replies: 146
Views: 81039

Re: Okko - Diablo Boost+ (goop pics!!) [traced]

neb wrote:How is the sound difference between 9V and 18V? I am wondering if I should run it at 18V all the time and drop the switch.
Run it at 18V. Once I switched mine to 18V I never switched back. 9V is only worth it if you have exceptionally good J201s.
by Chewbacca
30 Jan 2017, 20:58
Forum: Boutique Stompboxes dissected...
Topic: Bogner La Grange [traced]
Replies: 154
Views: 48614

Re: Bogner La Grange [traced]

I just noticed I'm getting a loud squeal with the gain switch in either outer position, in the center off position sounds fine. Squeal changes tone when in 18v mode, but gain, quiet in the center off position. With 18V engaged and the gain and presence switches on high there is a lot of gain. I use...
by Chewbacca
30 Jan 2017, 20:40
Forum: Boutique Stompboxes dissected...
Topic: Bogner La Grange [traced]
Replies: 154
Views: 48614

Re: Bogner La Grange [traced]

Chewbacca: Do you have the boost section at the beginning or at the end in your circuit? Yes the boost definitely needs to be at the end. With the Gain switch and the 18V switch you have more than enough gain at the front end. The Booster in front will increase gain, of course, but the thing will s...
by Chewbacca
29 Jan 2017, 12:24
Forum: Boutique Stompboxes dissected...
Topic: Bogner La Grange [traced]
Replies: 154
Views: 48614

Re: Bogner La Grange [traced]

Thank you Manfred for the capacitor clarification - something new to learn every day. :D I did some testing with the gain pot. With the 25K pot you have only max 25K +47R separating the signal from ground so you loose some gain right there. I found that max gain can be achieved with around 65K to gr...
by Chewbacca
28 Jan 2017, 21:56
Forum: Boutique Stompboxes dissected...
Topic: Bogner La Grange [traced]
Replies: 154
Views: 48614

Re: Bogner La Grange [traced]

I still think the boost should go to the back end of this. It works as a gain boost in front but it still works better as a volume boost in the back. Also: what is the purpose of the 33uf and 100nf in parallel right before the COT part? That just makes it 33.1uF and that does not make much of a diff...
by Chewbacca
27 Jan 2017, 14:35
Forum: Boutique Stompboxes dissected...
Topic: Bogner La Grange [traced]
Replies: 154
Views: 48614

Re: Bogner La Grange [traced]

Is the first schem correct then or should it get updated? The top schem in Manfred's post works for me. Just make sure to connect the RevLog pot in a way that you get the best range. For me this is Pins 1+2 to ground and 3 to the 4uF. With pin 1 being the right pin looking at the back side of the p...
by Chewbacca
26 Jan 2017, 09:22
Forum: Boutique Stompboxes dissected...
Topic: Bogner La Grange [traced]
Replies: 154
Views: 48614

Re: Bogner La Grange [traced]

That's it. I connected Pins 1+2 of the Boost pot to ground. Pin 3 connects to the 4u7. This works exactly as one would expect. 4u7 and the C22K pot are now in parallel to the 5K1. This is not exactly like it works in the SHO but close enough to make the booster act like an SHO without the crackle.
by Chewbacca
25 Jan 2017, 20:06
Forum: Boutique Stompboxes dissected...
Topic: Bogner La Grange [traced]
Replies: 154
Views: 48614

Re: Bogner La Grange [traced]

I just built the thing on Vero. Most of it works pretty well. The Gain and the Boost pots are not very responsive and I am still fighting some noise from the Voltage doubler. But my main question is: are you sure the booster is in front of the main circuit and not behind it as in the Box of Rock? Al...
by Chewbacca
13 Jan 2015, 15:18
Forum: Boutique Stompboxes dissected...
Topic: Zvex - Box of Metal [traced]
Replies: 174
Views: 76811

Re: Zvex - Box of Metal [traced]

Thank you , but that was not what I meant. The Mid increase when I turn clockwise, but they decrease again when the pot is fully turned to the 5 O clock position.
by Chewbacca
10 Jan 2015, 18:33
Forum: Boutique Stompboxes dissected...
Topic: Zvex - Box of Metal [traced]
Replies: 174
Views: 76811

Re: Zvex - Box of Metal - gate works [traced]

OK - here's the whole thing as I have build it. It works – but please leave comments and recommend improvements. I have used daughter boards because I have built the gate after the BOM - for the next version I'll come up with a one-board layout. I could not get a TLE2426 so I used an Opamp as a rail...
by Chewbacca
08 Jan 2015, 16:26
Forum: Boutique Stompboxes dissected...
Topic: Zvex - Box of Metal [traced]
Replies: 174
Views: 76811

Re: Zvex - Box of Metal [traced]

..... and the Gate footswitch can be wired to cut the connection between the J175 and the Volume Pot.
by Chewbacca
08 Jan 2015, 16:23
Forum: Boutique Stompboxes dissected...
Topic: Zvex - Box of Metal [traced]
Replies: 174
Views: 76811

Re: Zvex - Box of Metal [traced]

The Gate works! I have finally made the gate work. I built the gate based on Wlats schematic, but I wired the J175 switching FET that it connects the output signal to ground when it is closed (no voltage on Gate) and cuts this connection - i.e. allows the signal top go to the output - when it opens....
by Chewbacca
05 Jan 2015, 23:28
Forum: Boutique Stompboxes dissected...
Topic: Zvex - Box of Metal [traced]
Replies: 174
Views: 76811

Re: Zvex - Box of Metal [traced]

View my posts of feb 2011 and feb 2012 (both page 8). Alas, not verified yet. I'm having trouble finding time to complete this project... Greetings, Wlat Hi Wlat, I have built the BOM on my on Vero Layout and the BOM part works great. I have also built the Gate according to your schematic, but I ca...
by Chewbacca
26 Dec 2014, 18:10
Forum: Boutique Stompboxes dissected...
Topic: Okko - Diablo Boost+ (goop pics!!) [traced]
Replies: 146
Views: 81039

Re: Okko - Diablo Boost+ (goop pics!!) [traced]

I have built an Okko Clone on Vero - built according to the schematic everybody seems to use. I've had it for a while and have tested it against original Diablos I had at my workshop for repairs. So I am pretty sure my clone sounds like the real thing. Reading bordonberts post, I just opened the thi...
by Chewbacca
24 Dec 2014, 19:44
Forum: Boutique Stompboxes dissected...
Topic: LAL - Oscillo Fuzz (Lastgasp Art Laboratories)
Replies: 54
Views: 17709

Re: LAL - Oscillo Fuzz (Lastgasp Art Laboratories)

Is anybody still watching this thread? I have built my own Vero but I seem too run into similar problems as lopsided. S1 S4 and S6 seem to do what they are supposed to do. Oscillation only occurs when S5 and S2 are both switched to collector of Q2 - in other positions it is just a fuzz. With S5 swit...
by Chewbacca
24 Mar 2014, 21:36
Forum: Boutique Stompboxes dissected...
Topic: Okko - Diablo Boost+ (goop pics!!) [traced]
Replies: 146
Views: 81039

Re: Okko - Diablo Boost+ (goop pics!!) [traced]

I did some more measurements and I am not sure about the VOLUME and GAIN pots going to 9V instead of ground anymore. I was fixing some wiring issues in two gooped original Okkos. One hat them connected to +9V and the other to ground. Both looked pretty much the same, but they may have been different...
by Chewbacca
17 Mar 2014, 21:49
Forum: Boutique Stompboxes dissected...
Topic: Okko - Diablo Boost+ (goop pics!!) [traced]
Replies: 146
Views: 81039

Re: Okko - Diablo Boost+ (goop pics!!) [traced]

I've just dissected an original Okko Diablo Plus. We've all got the Boost part completely wrong. The Gain Plus Pot is simply an A500K in series with the Gain Pot and it gets jumpered by the + switch when it is off. Also Pins 1 on the Vol Pot and the Gain Pot (through the Gain Plus pot) run to +9 Vol...
by Chewbacca
16 Mar 2014, 18:07
Forum: Modern Stompbox Effects (1975 - ...)
Topic: MXR Classic 108 Fuzz [schematic]
Replies: 50
Views: 40004

Re: MXR Classic 108 Fuzz [schematic]

Did some testing - this is a lousy buffer by itself, but it is absolutely the right thing for the 108 Fuzz. I've tried other buffers and they almost all made the Fuzz go wonky. But this one does the job on the spot.
Thanks Harold
by Chewbacca
15 Mar 2014, 16:23
Forum: Modern Stompbox Effects (1975 - ...)
Topic: MXR Classic 108 Fuzz [schematic]
Replies: 50
Views: 40004

Re: MXR Classic 108 Fuzz [schematic]

Hi, any news about the buffer? I've built the one Harold posted on breadboard and tried it without the fuzz. I buffers, but not very well. Sound is slightly distorted and it filters out a lot of the bass and mids. This may or may not be intentionally. I was thinking about putting in a clean FET Buff...