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Topics - Blues Healer

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Tech Help - Projects Page / Problem with diode overheating in a fuzz face project
« on: September 21, 2014, 04:02:46 PM »
Howdy.
I did a fuzz face project in Eagle, based on the General Guitar Gadget '70 fuzz schematic here:
http://www.generalguitargadgets.com/pdf/ggg_ff5_sc_b70.pdf
(I added the optional components on mine)

I had boards fabbed, but I'm having a problem with D2 overheating.
It won't bias properly. For reference, my voltages are:
Q1: C=.99 B=.39 E=.17
Q2: C=.52 B=.89 E=.40
The transistors are a 2N2369 in Q1 and 2N3904 in Q2.

I've attached my layout and schematic. Maybe there's something obvious I'm overlooking, but I've checked all the values and orientations of the components, and replaced C4 and C6, as well as changed D2 to a 1N4001.

I kind of don't want to run my probe with the board overheating.

this is a fairly simple circuit, but I'm stumped, so I appreciate any suggestions


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Open Discussion / So, Mouser dropped prices on Xicon metal film resistors
« on: August 05, 2014, 10:46:34 PM »
they don't have a small price break at 10, but 200 have gone from $4 to $2.80

http://www.mouser.com/ProductDetail/Xicon/271-10K-RC/?qs=sGAEpiMZZMu61qfTUdNhG%2fNICg4NOtz51bQLKR8aMJE%3d

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Build Reports / King Tut demo (rullywow)
« on: August 02, 2014, 07:03:49 PM »


Starr tele/ Blues Junior/ King Tut

http://www.starrguitars.com/

http://www.rullywow.com/product/king-tut-fuzz-pharoh-clone-pcb/

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Tech Help - Projects Page / Problem adding a "Vx" reference point to an opamp in Eagle
« on: July 07, 2014, 10:58:24 AM »
I'm tracing a circuit in Eagle.

I'm having a problem adding a "Vx" reference point to an opamp - it's part a of a dual opamp.

When I "add" the part from the library, the preview shows pins 4 and 8, but when I put it in the schematic, those pins don't show. So, I can't add either the "Va" to pin 8, or the GND to pin 4, as the schematic calls for. I can draw those parts, but without the pins, the connections aren't reflected on the board.

Am I using a wrong part, a wrong method, or what?

I've added "Vb" successfully to another part of the circuit.
I've also successfully added a "Vx" to an opamp in another circuit, since the inserted part displayed the pins, so I'm a little stumped.

thanks in advance, and in addition, I'll continue my search for an answer


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Open Discussion / Do 3PDT wiring boards pop less?
« on: June 25, 2014, 01:46:32 PM »
On my facebook feed, Skreddy commented that he's now using a 3PDT wiring board. Analog Mike chimed in, and said he thinks they pop less. Is that true?

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Open Discussion / NPD: Catalinbread Dirty Little Secret
« on: June 04, 2014, 05:54:40 PM »
Although I have a Grapevine board, I couldn't resist ordering a Catalinbread Dirty Little Secret. After all, I think Brian gave a nod to buying the pedal, even after they posted the schematic online, etc ....

The clips made me seriously interested, despite the fact that I have a bunch of great overdrives.

Anyone with an original DLS is encouraged to chime in.


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Open Discussion / hahaha .. Perseus!
« on: March 28, 2014, 07:04:38 PM »
saw this demo on Reverb.com .... shit ... how many of you can say your hair got in the way of your playing???

anyway ... probably not totally practical, but like a lot of fuzz pedals, a heckuva lotta fun

what's the Octavia, an octave above?   .... this is two sub octaves


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Open Discussion / the new MXR Uni Vibe actually sounds pretty good!
« on: March 21, 2014, 08:54:23 PM »

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Tech Help - Projects Page / Quadrovibe lamp doesn't turn off
« on: March 18, 2014, 08:18:05 PM »
Howdy,
I built a Quadrovibe ... the bypass works, the LED works, and flashes in time with the speed knob, but the lamp doesn't cycle off, ergo ... no effect :(

anyway, does anyone have any suggestions? from reading the build docs, my next guess would be to take a look at trying different values in R16 & 17.
another thing is that when I first adjusted the trimmers, I had to get the Chop close to all the way up before the lamp fired.
one other thing I should mention is that I used an ON/ OFF/ ON DPDT for the switch... I'm gonna put in an ON/ ON in a couple of days, when I get the part

thanks for your help!

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General Questions / Anyone know where to get little mini knobs like these?
« on: March 02, 2014, 02:36:37 PM »
 ... and do you happen to know how they're mounted?



thanks kindly!

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Open Discussion / Do you know Mouser's history????
« on: February 26, 2014, 12:14:04 AM »
The other day I was checking out of my Mouser order and noticed a page that read "A ... Berkshire Hathaway company". Wow, that's Warren Buffett's investment company.

Yes, it's true that Mouser is a big company now, but it started small. Years ago I got Craig Anderton's book, and Mouser was one of a handful of suppliers then. Since I lived in San Diego and they were local, I started ordering from them. The other day I was going through my storage and found an old Mouser box with some mojo parts, and an invoice from 1995. :)

Anyway, you can read Mouser's history on their site. As I already knew, it was started by a high school science teacher who had a hard time finding parts for his classroom projects.
I suppose there's a lesson there: start small and dream big ... or something like that.

12
General Questions / Suggestions for a good Tri Vibe pre-made board??
« on: February 21, 2014, 09:04:54 AM »
Hello ...
I'm looking for a good Tri Vibe board, maybe one that will fit in a 1590B.

I did a search and saw the ChiBoy board, but that's a bit larger ...
I'll keep looking through my searches in the meantime, but I appreciate any suggestions!


Thanks kindly!

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Tech Help - Projects Page / here's a pin header for the Zero Point SDX breakout board
« on: February 05, 2014, 09:59:31 AM »
here's a pin header for the Zero Point SDX breakout board connection:
http://www.mouser.com/Search/ProductDetail.aspx?R=M20-9991046virtualkey57420000virtualkey855-M20-9991046

this looks like the right part, but please verify, since I haven't placed my order and seen one yet. They may have others if you search, but this was the first one I found.

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Tech Help - Projects Page / Kingslayer - wiring the buffered switch
« on: February 04, 2014, 02:06:24 PM »
Howdy
I'm working on my second Kingslayer.
On the buffered wiring, one lug of the switch has four connection - two 68k resistors, the 100k resistor, and an output wire.
Does anyone have a tip for wiring this? I had a heck of a time with the first one!
I'm thinking of tacking a bit of left over lead above the lug to make a more convenient terminal.

thanks in advance!

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Build Reports / madbean mudbunny mayo + clip
« on: December 08, 2013, 09:10:49 PM »






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