DIYstompboxes.com

I found a photo of a WD-era Yellow Humper which I strongly suspect (based on previously trying to work out the PCB layout of a Purple Peaker) has two 1M resistors in the locations where the 470Ks would go according to the schematic (the two that are nearest to the viewer):



Otherwise, visible resistor values seem to be as per the schematic (15K, 33K, a couple of 39Ks, a 150K on the right side where I suspect the input to be). Not a whole lot to go on, but a bit more grist for the mill.

(Oh and that Purple Peaker PCB appeared to have BC183LCs rather than 2SA666s, for what it's worth...)

Good digging.

So maybe the WD version is different and they put the 1M's in there to reduce the flatness issue.
Apparently there are differences between the Musitronics, Re-Issues and WD's;  Re-Issue maybe closer to WD's.
The electrolytic capacitor dates are 1994 which would be OK for WD's.   

I saw a unit with BC183's and small 1/8W resistors.  At first I thought it was a DIY clone but maybe it was a WD era unit.

The typical gains on the BC183LC are quite high, so perhaps another tweak.

in a page of photos, any chance of a pic of those caps?

Pretty much like Mono’s pic but PRR hit the nail on the end. Most of the film caps in the Mallory drawers are of the orange chicklet flavor. Tons of 68NF and 150NFs (super happy for these as 150NF is a value I’ve almost never had on hand when needed) in orange and then I also discovered a drawer of 56NF which appear to be a more raspberry flavor.

So, almost done with home repairs, and wanting to get back to it. I’ve been playing with a PT Wobble type thing, but want to switch between a StompFLO and One Shot. 4 CVs and the LFO to switch. First I was thinking NPNs instead of FETs in an extended flip flop, was worried about the voltage level changing (or would common base work?), then thinking a 74hc157, maybe flipping relays…?

I figured relays would keep the signals the same better than the others, but haven’t had time to play with any of it…on the other hand,





I’m almost done with the house, so it’s just been running round my head. Any pros or cons to each method? I’m figuring the 157/relay way would be lowest part count.

Why do you need to fill in six checkpoints for each post here?
Choose words, write letters? It's inconvenient.


Thank you. I will look for this resource.

Quote from: Phend on May 31, 2023, 04:45:23 PM

A Ling ?

Chuck Berry - My Ding A Ling (1972)

The man refined and developed rhythm and blues for 70 years, and he is remembered for singing a dumb ditty about his wee-wee. (This was his only #1 hit, and next-to-last top 40.)

much much longer version

Did he play through speakers with Whizzer cones?
https://www.google.com.au/search?q=%2B%22whizzer+cone%22&source=lnms&tbm=isch&sa=X&ved=2ahUKEwj9_-2N-6D_AhUa7TgGHWPMAdQQ_AUoAXoECAEQAw&biw=1280&bih=899&dpr=1