• TalkBass has been independent since 1998. Add your voice.
    Create a free account to reply to discussions, view embedded media, and browse with fewer display ads.
    Join free Log in
    Want zero display ads or expanded classifieds tools? Compare plans.

overdrive/fuzz quest part 2

#701
John, I think there is something wrong with your above scope measurements if you are using 9V to power these circuits.

I just built that AMZ booster in SPICE and with a 9V source and it hard clips at 5Vp-p. My notes for the Glass Blower with the TLC2272 says clipping at 16.5Vp-p.

-Frank
 
#702
boomertech said:
John, I think there is something wrong with your above scope measurements if you are using 9V to power these circuits.

I just built that AMZ booster in SPICE and with a 9V source and it hard clips at 5Vp-p. My notes for the Glass Blower with the TLC2272 says clipping at 16.5Vp-p.

-Frank
Click to expand...

i'm definitely powering it with 9V.
what voltage p-p is your input signal?
 
#703
It really doesn’t matter what the input signal amplitude is with these two circuits, because they are a single stage amplifiers.

If you set the gain to minimum and increase the input signal amplitude until the output shows clipping, that clipping will be at the same level as if you set the gain to maximum and adjust the input amplitude to show the same clipping.

Your first measurement of that AMZ booster was probably correct, because I see the same waveform in SPICE as your scope picture at one-tenth of the amplitude.

Test your 9V source with your scope to make sure it doesn’t read 90V. I think your scope is set to x10.

-Frank
 
Last edited:
#707
I got two more 'new ones' completed before my schedule got really hectic.
JHS Superbolt (actually just a Runoffgroove Supreaux with a couple of mods), which I further modded for no low end loss. it's very nice sounding pedal now.

Superbolt-01.jpg


Superbolt-02.jpg


the other one is a Bixonic Expandora. it's a pretty unique circuit that uses two LM308 chips (kinda like a dual Rat distortion), but also has an optical device (a Sharp PC419 driven by 2660 internally biased transistor a that compresses & expands the drive circuit). IMO, it sounds good, but IMO, the original cut way too much lows and highs so I modded mine to be more to my idea of what it should sound like.

expandora-01.jpg


expandora-02.jpg
 
#708
johnk_10 said:
I also recently built a EQD monarch (Jfet orange amp simulator) and it also sounds really good.
and a bunch of others that I built and tested but aren't boxed up yet (that i really like) are the Wattkins RF DRIVE, my own BASS SCREAMER (modded for bass tube screamer), modded Maxon OD820 with blend, Frantone THE SWEET, Runoffgroove 22/7, Roger Mayer STONE FUZZ, Colorsound OCTIVIDER, Durham CRAZY HORSE, TC Electronic SPARK BOOSTER, Catalinbread FORMULA no5, T-Rex MUDHONEY, Electro Harmonix HOT TUBES, Fred Briggs E11even, Lotus Pedals SNOWJOB, Sadowsky PREAMP, BJFE FOLK FUZZ 3.5%, Tone Factor CREAM PIE DELUXE, Sam Ash FUZZ-TAIN, Monolith Effects ORACLE, Roland AD-50 DOUBLE BEAT FUZZ, Modded BAZZ FUSS, Roger Mayer OCTAVIA, and Roger Mayer PAGE 1, so it looks like I still have a lot of drilling and mounting to do.
Click to expand...

I'm glad you liked the CPD. I'm the guy who designed it. Simple design that I felt added a really nice bit of "extra" grit/girth/whatever to the sound. :)
 
#719
DirtyDuke said:
I have the orange bass pre and had a monarch for a bit. the orange pre is amazing, the monarch was good but not in the same league in my opinion.
Click to expand...
yep. the monarch is pretty good, but IMO, that Orange prel sounds a lot more like an actual Orange head than a pedal.
 

Latest posts

Top Bottom
Back