Pinnacle problem
I built wampler pinnacle using this schematic:
But I have one problem...
When the tone knob is turned to the right it sounds normal, graphicaly like this:
But when tone knob is in the middle or left positions (more bass) it behaves like this:
So when i hit a string, it takes about a second to reach normal volume.
Any ideas how to fix this?
Thanks
But I have one problem...
When the tone knob is turned to the right it sounds normal, graphicaly like this:
But when tone knob is in the middle or left positions (more bass) it behaves like this:
So when i hit a string, it takes about a second to reach normal volume.
Any ideas how to fix this?
Thanks
- NickS
- Solder Soldier
Sounds like some sort of mis-biassing problem, but the only device that should be affected by the tone control is the last FET. The tone control woulld be varying the gate resistance to earth through 220k+10k+10k+tone+82K in parallel with 470k; do you have a meter so you can see if the voltage on the FET's source varies as you move the tone control?
Can you post clear close-ups of your build so that we can check the layout? Also details of which FETs you used/pinout?
Can you post clear close-ups of your build so that we can check the layout? Also details of which FETs you used/pinout?
- lutor
- Breadboard Brother
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- lutor
- Breadboard Brother
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- my favorite amplifier: Mesa
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- caspercody
- Resistor Ronker
has anyone built this one? Can anyone verify if it is the Pinnacle?
- caspercody
- Resistor Ronker
Okay I made this, and it is very close to the Pinnacle. Not sure what version Pinnacle. I did remove the boost resistors, because I was getting a lot of noise. Otherwise built it per schematic.
- lutor
- Breadboard Brother
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- Joined: 06 Mar 2010, 21:47
- my favorite amplifier: Mesa
- Completed builds: Catalinbread Hyper pak 2 , B K Butler 2, 3Legged dog, Soldano Supercharger GTO Jfet, MXR Phase 90, Zvex Fuzz Factory, Bartolini NTMB3, Fulltone Bassdrive 2, Gruntbox,MM Stingray Bass preamp,Emma ReezaFratZitz, Jumbo Tonebender, Freya Slo 100 Emulator, Dr. Boogie Emulator, Insanity Box, Fulltone OCD, Fuzz Face Germanium, Fuzz Face Silicium,Crunch Burnig DSM, Ross Compressor, Nurse Quaky, Purple plexi 800, EH Pulsar.
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I have Build and verified. Only modification on the part that regards the boost. Great sound!
- caspercody
- Resistor Ronker
Do you think it sounds like the Pinnacle?
- lutor
- Breadboard Brother
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- my favorite amplifier: Mesa
- Completed builds: Catalinbread Hyper pak 2 , B K Butler 2, 3Legged dog, Soldano Supercharger GTO Jfet, MXR Phase 90, Zvex Fuzz Factory, Bartolini NTMB3, Fulltone Bassdrive 2, Gruntbox,MM Stingray Bass preamp,Emma ReezaFratZitz, Jumbo Tonebender, Freya Slo 100 Emulator, Dr. Boogie Emulator, Insanity Box, Fulltone OCD, Fuzz Face Germanium, Fuzz Face Silicium,Crunch Burnig DSM, Ross Compressor, Nurse Quaky, Purple plexi 800, EH Pulsar.
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I do not know how much equal one I can be to the Pinnacle, because I cannot make a comparison direct. I can imagine the likeness through the sample found online. I am but sure that it has an optimal one of brown sound distortion and not only that one. Certainly he will construct it to who will have much satisfaction.
can u post your pcb?? i am very courious to try it!!
thanks
thanks
- caspercody
- Resistor Ronker
You can use the BSIAB2 pcb, and make the changes in the grayed out areas from the schematic shown. The only thing that would not be on the pcb is the grayed area after the tonestack. This is the twin t filter, and a Jfet recovery stage.
- indyguitarist
- Resistor Ronker
oddly enough this is the first time I looked at this schem much.... this circuit isn't correct past the gain stages, quite a bit different actually.mislav.vg wrote:I built wampler pinnacle using this schematic:
But I have one problem...
When the tone knob is turned to the right it sounds normal, graphicaly like this:
But when tone knob is in the middle or left positions (more bass) it behaves like this:
So when i hit a string, it takes about a second to reach normal volume.
Any ideas how to fix this?
Thanks
It's also from a version that's about 3 or 4 years old. The newest ones are quite a bit different.
Do you have the correction for the schematic after the first gain stage? or a full schematic?indyguitarist wrote:oddly enough this is the first time I looked at this schem much.... this circuit isn't correct past the gain stages, quite a bit different actually.mislav.vg wrote:I built wampler pinnacle using this schematic:
But I have one problem...
When the tone knob is turned to the right it sounds normal, graphicaly like this:
But when tone knob is in the middle or left positions (more bass) it behaves like this:
So when i hit a string, it takes about a second to reach normal volume.
Any ideas how to fix this?
Thanks
It's also from a version that's about 3 or 4 years old. The newest ones are quite a bit different.
Cheers
- joeboo88
- Resistor Ronker
I built the pinnacle according to lutors perf layout,last night, and it fired up first time.
sounds awesome, no noise from the boost section, its sound very close the real thing, to me anyhoo.
thanks again Lutor
sounds awesome, no noise from the boost section, its sound very close the real thing, to me anyhoo.
thanks again Lutor
Ebay is a fucker ~ Sinner - If this is something unique, then I'm a teletubbie ~also Sinner
- lutor
- Breadboard Brother
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- Joined: 06 Mar 2010, 21:47
- my favorite amplifier: Mesa
- Completed builds: Catalinbread Hyper pak 2 , B K Butler 2, 3Legged dog, Soldano Supercharger GTO Jfet, MXR Phase 90, Zvex Fuzz Factory, Bartolini NTMB3, Fulltone Bassdrive 2, Gruntbox,MM Stingray Bass preamp,Emma ReezaFratZitz, Jumbo Tonebender, Freya Slo 100 Emulator, Dr. Boogie Emulator, Insanity Box, Fulltone OCD, Fuzz Face Germanium, Fuzz Face Silicium,Crunch Burnig DSM, Ross Compressor, Nurse Quaky, Purple plexi 800, EH Pulsar.
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I have felt some person that he has used mine layout for the build and has had a broblem of feedback or/and hiss. If someone other person has the same problem and wants to resolve, is necessary replace the R-3 (of mine layout) with a low value resistor. To go down step by step till to find the value of the resistor that eliminates the problem. I task that can be arrived till value of 100K.
Best regards.
Best regards.