LOVEPEDAL SUPER SIX STEVIE MOD

[GeSi]

sounds great; https://www.youtube.com/watch?v=AOhcPsPwcrc

https://www.youtube.com/watch?v=x6IGFsCTU2c

is there any schematics out on this yet?
might be a slight difference between original super six build which is a simple pedal.

[nocentelli]

Try tacking one of these on the end?

[tracer03]

Any chance someone could do a vero layout with the Blackface tone stack added?

[Neil mcNasty]

Her you go!
Thanks for reminding me of my previous plan to do this...



But this one should be more interesting:
The original Tone Stack from the Super Reverb Amp...

[tracer03]

Neil mcNasty wrote

Her you go!
Thanks for reminding me of my previous plan to do this...

Thanks a million! Building these tonight!

[tracer03]

Hey, quick question to confirm: the caps in the upper right, just to the left of the 47uF radial - you have them as '100nF' but the symbol you used looks to be the one for a ceramic cap. Just want to confirm that it's not a typo on the value(as in - should it be a 100 PF ceramic cap, or a 100nF film/other cap)?

Thanks again!

[Travis]

It is common to use a ceramic ~100n cap to filter DC along with the electrolytic as seen here.

In many cases you may not notice a difference at all if you use film or even omit that cap but it is intentionally ceramic 100n

[tracer03]

Travis wrote

It is common to use a ceramic ~100n cap to filter DC along with the electrolytic as seen here.

In many cases you may not notice a difference at all if you use film or even omit that cap but it is intentionally ceramic 100n

Great - thanks for the confirmation.

Off to the bench!!!!

[tracer03]

One more question: what value would be better to sub for the 250pF ceramic cap - 220p or 270p?
Or should I run 2 caps in parallel (100p and 150p), placing them in columns 11 & 12 in the same rows as the original 250p cap?

[traktop]

I would shocket that cap and listen to it.
I remember playing around with the treble capacitor on my model t preamp build to tame some harshness, and seemed to remember that the smaller the cap, the less harsh treble/hi mids I get.
Good luck!

[tracer03]

Finished the Blackface'd version up last night, and it's 'working'...but it doesn't seem to have as much gain as the demos. In addition, the Bass and Treble controls seem to work together in a way that's not intuitive:

Treble at noon, bass at 0 seems to have more bass than when I turn the bass up all the way.
The treble control itself seems to have only an effect through the first 2/3 of the sweep. Maxing the treble makes it 'hissy' even when I adjust other controls.

I tried a 220p and a 270p ceramic in place of the 250, and the 220p seemed to be just fine - just a little less harsh on the highs with various settings. Didn't affect the gain or the issue I had with the tone controls, though.

I checked the pots, double and triple-checked my wiring, etc. and everything is spot on. I'm going to try the version with the Super Reverb Tone Stack and see if there's any difference.

[tracer03]

Just finished the 2nd version, with the same results: weird pot behavior. Turning the treble pot to max actually seems to increase the bass output...but I'm not getting anything close to the Stevie Mod demos I've seen online.

[traktop]

I´ve checked the layouts and they seemed ok.
Why don´t you try disconnecting treble 3 and see what you get basswise through all pot run...?

[tracer03]

traktop wrote

Why don´t you try disconnecting treble 3 and see what you get basswise through all pot run...?

Disconnected Treble 3. results:

Vol - Seems to work fine.
Intensity - operates like a filter, or old tone control: at 0, very 'round' (like a hard low-pass filter), at 10, very bright. Not sure if this is expected, but it's 'working', so to speak.
Bass - again, seems to be in reverse:  at 0, there's more bass, at 10, thinner sound with less bass.
Treble - at 0, more bass/muted sound, at 10, trebley (almost like a treble booster).

[traktop]

If the bass pot worked backwards, the only thing that comes to my mind is either you´ve got the bass pot  wired backwards, or have 47n/100n caps swapped, but you said you´ve checked it properly.

The treble pot should be lowering the general volume as you turn it up, not increasing highs, cause you didn´t connect "Treble 3" to anything, so there´s something wrong there.

No idea about the intense pot behaviour.

[tracer03]

Yeah, I went over the board and each component meticulously: I checked each component before soldering, and verified the placement during build and when trying to debug.

I'm getting the same behavior from both layouts, so I'm pretty sure there's something amiss with the layout(s), rather than my build.

[traktop]

Treble 3 board have just a connection to one leg of the 250pf cap, then there´s a cut, so why you get more highs when turning up the treble pot, having High3 disconnected from the board, is a mistery to me.

I´ve been checking both layouts against the original layout and "la revolution deux" schematics, and everything seemed to be in the right place.

Try swapping Bass3/Bass1&2 just for the sake of listening to how the tonestack reacts...

You could try this as well:

Disconnect mid1+2 from the "proper stack" layout and also lift the 250pf leg of the 5th row. Then connect Vol3 to the 6th row, (instead of Treble1 &Bass3).
The idea is bypassing the whole tonestack and make the signal coming from the transistor going straight to the volume pot after passing through 100k resistor+100n cap. That way you could focus on the behaviour of intense pot, (it will probably sound lower due the 100k resistor, so crank the volume pot)-

I was going to suggest looking for solder bridges and cold joints as well, but you probably have already done it.

[tracer03]

traktop wrote

I was going to suggest looking for solder bridges and cold joints as well, but you probably have already done it.

Yep, generally the first thing I do before I test: check all joints, and run my Xacto between all the strips.

I hooked both versions up to my test rig last night, and I get the same behavior with both versions - since I test all my components before I solder, I'm pretty confident that it's not just a bad component.

Today I'm going to try building the original layout (plain ol' Super Six, that was verified a while back) and see what that one sounds like.

[tracer03]

Just finished up the Original layout for the Super Six, and it works fine.

[music6000]

The current 4 Knob Lovepedal Super Six, Blackface & Brownface configs  all use an Op Amp.