Recent posts

#51

Tech Help - Projects Page / Re: Schoolie 24 problem

Last post by geekmacdaddy - July 25, 2025, 12:26:18 AM

Would you believe (Don Adams
Get Smart, tv series voice) a dodgy NE570N? Not a ton of hair there to start. Now there's a bit less. 
Thanks All 

#52

Build Reports / Re: Clever Hans — Comparator F...

Last post by Aleph Null - July 24, 2025, 10:44:36 PM

This is really cool. Congrats.
Ive been messing with comparators recently.
With this kinda application, is it right that its always super high gain? Any way to tame that?

All opamps are designed for super high gain. You can tame the gain with negative feedback, but then you have a regular opamp circuit and not a comparator.

#53

Build Reports / Re: Clever Hans — Comparator F...

Last post by LaceSensor - July 24, 2025, 10:02:27 PM

This is really cool. Congrats.
Ive been messing with comparators recently.
With this kinda application, is it right that its always super high gain? Any way to tame that?

#54

Build Reports / Re: Clever Hans — Comparator F...

Last post by Aleph Null - July 24, 2025, 08:39:12 PM

That finish looks fantastic! Sounds great, too.

Thanks! It's seaside, ocean mist, pistachio, and grape over a black powder coat.

#55

Open Discussion / Re: 1776 Cardinal Tremolo layo...

Last post by jimilee - July 24, 2025, 08:15:49 PM

I can look this evening (couple of hours or so).


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#56

General Questions / Re: EH LPB 1

Last post by jimilee - July 24, 2025, 08:14:41 PM

Transistor maybe shot, it looks like it's cooked pretty good.


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#57

Global Annoucements / Re: Smallbear now carrying mad...

Last post by JasonWickersham - July 24, 2025, 08:12:20 PM

I'm pleased to announce a limited number of madbeanpedals projects are now being offered at smallbear. These are offered as PCB, full or partial kits. There will be about 20 projects to start with more in the future if all goes well. Thanks to Chris and smallbear!


https://smallbear-electronics.mybigcommerce.com/pedal-kits/?Brand=Madbean__Pedals&filterPage=1

Heck yeah man!!!

#58

General Questions / Re: EH LPB 1

Last post by NorthCoast - July 24, 2025, 06:07:50 PM

Hmm...

What voltages do you have on the transistor?

Maybe something wrong with the pot?

#59

Open Discussion / 1776 Cardinal Tremolo layout v...

Last post by LaceSensor - July 24, 2025, 05:26:15 PM

Hi

Does anyone have the "old" v1.4 build doc for the Cardinal Tremolo, layout by 1776 effects?
It seems they did a V2, and the parts BOM has changed, and I cant find the PDF for the "old" one anywhere, inc my HDD

Thanks in advance!

#60

General Questions / Re: EH LPB 1

Last post by geekmacdaddy - July 24, 2025, 05:13:11 PM

It only has 4 resistors, one is 390k, (could that be the one?)

Is that actually a 390R coming off of the emitter?

So:

910k voltage divider resistor, between base and v+
100k voltage divider resistor, between base and ground
10k  collector resistor, between collector and v+
390R emitter resistor, between emitter and ground

Like mauman said, the 910k and the 10k should connect to v+

Thank you North Coast.
Correct. 390R. It's working but there is no boost. Vol control works when on/off switch is engaged, there's a slight change in tone (ala typical booster) but the max vol is unity. Thoughts?
Thanks for the help
Jeff