New Big Muff Perf Layout - very tiny and neat, minimal off-board wiring.

frequencycentral · April 17, 2009, 09:17:59 AM

I just completed building from this layout, so it's tested and verified, though I still need to box it up. I wanted to have all the pots on the board, as I hate loads of off-board wiring. This also means that the board is secured in place by the pots. It's pretty tight, and might test your soldering skills. I've built the Violet Ram's Head version, but it will work for all the transistor versions with a little thought. The layout was designed to fit sideways (Zvex style) in a 110x60x30 enclosure, without a battery - I don't use them. I added an extra pot 'Clip' which reduces the effect of the diodes in the first clipping stage, an example of diode warping, giving interesting variations. I originally had Si diodes in that stage, but I liked the effect better with Ge. And not a submini tube in sight! Enjoy!

Renegadrian · April 17, 2009, 09:31:00 AM

Nice! I hate offboard wiring...

svstee · April 17, 2009, 12:34:20 PM

I'm with you, I put pots on the board whenever I can, even with vero layouts.

Sorry to say, but the lack of glass bottles disappoints me...

frequencycentral · April 17, 2009, 12:37:11 PM

Quote from: svstee on April 17, 2009, 12:34:20 PM
Sorry to say, but the lack of glass bottles disappoints me...

.......but at least I used mojo mushroom trannies and some vintage Ge diodes!

Nitefly182 · April 17, 2009, 01:49:14 PM

Where are people getting these BC208s?

Der Groovemeister · April 17, 2009, 01:50:42 PM

Nice work!

Soundclip??? (especially with the clip-pot)

frequencycentral · April 17, 2009, 02:02:47 PM

Quote from: Nitefly182 on April 17, 2009, 01:49:14 PM
Where are people getting these BC208s?

Old organ that I took apart - I have some spare if you want to trade.

Quote from: Der Groovemeister on April 17, 2009, 01:50:42 PM
Nice work!

Soundclip??? (especially with the clip-pot)

Ok, I'll do a clip of the 'Clip' when it's boxed up.

Ben N · April 17, 2009, 02:17:56 PM

Quote from: frequencycentral on April 17, 2009, 12:37:11 PM
Quote from: svstee on April 17, 2009, 12:34:20 PM
Sorry to say, but the lack of glass bottles disappoints me...

.......but at least I used mojo mushroom trannies and some vintage Ge diodes!

Metal film Rs--very un-mojo! [-X (wagging finger emoticon)

JK. That look's great, Rick--again.

Nitefly182 · April 17, 2009, 02:36:25 PM

Quote from: frequencycentral on April 17, 2009, 02:02:47 PM
Quote from: Nitefly182 on April 17, 2009, 01:49:14 PM
Where are people getting these BC208s?

Old organ that I took apart - I have some spare if you want to trade.

Damn. Last organ I took apart was a 70s hammond and all it had were a ton of super low gain and power silicons. Loads of caps and stuff but nothing great or worthy of desoldering or clipping out.

newperson · April 17, 2009, 02:50:26 PM

can you post a pic of the back of this? i have never used this type of board.
thanks,

svstee · April 17, 2009, 03:03:41 PM

Uh-oh, ceramic caps! The Mojo Police will be kicking down your door in the middle of the night for sure now! And with metal film instead of CC! If I were you I would leave the country!

JK, loving the build as always, rick!

Electric Warrior · April 17, 2009, 04:22:10 PM

approved by the mojo police. ceramic is what belongs in there. anything else would lessen that muff mojo

biggy boy · April 17, 2009, 06:04:56 PM

Rick
It's not safe out here in the solid state world!
Quick get back into your vaccum filled glass Envelope.

Hey nice job!
Do you happen to have the schematic for this with your mods?

Glen

frequencycentral · April 18, 2009, 07:41:15 AM

FREQUENCYCENTRAL RAIDED BY MOJO POLICE SHOCK !!
In the early hours of Saturday 18th April 2009 the premises of frequencycentral aka Rick Holt aka Doctor Analogue was raided by Mojo Police accompanied by sniffer dogs. The Mojo Police found quantities of illegal metal film resistors and ceramic capacitors. Holt (age 964) claimed that they were for presonal use and that he had no intent to supply. He asked for several counts of uber-cool submini tube effects pedals and amplifiers to be taken into account. Sniffer dogs also found a circuit board containing a quantity of solid state semiconductors, the defendant pleaded that this was a momentary lapse which he knew was wrong but it felt good at the time, and that he intended to return to his vacuum filled glass envelope as soon as the supply of solid state semiconductors was exhausted. The case goes before the Mojo Magistrates on 17th May 2009, bail was set at £3.1415926, and Holt was told not to leave town.

Ice-9 · April 18, 2009, 08:04:56 AM

thats the best laugh iv'e had all week, Nice one Rick, the effect looks very nice as well especially those little button trannies.

frequencycentral · April 18, 2009, 08:55:42 AM

Quote from: biggy boy on April 17, 2009, 06:04:56 PM
Do you happen to have the schematic for this with your mods?

The clip mod is just what I did here: http://www.diystompboxes.com/smfforum/index.php?topic=75715.0

Other than that I just subbed a few resistors, I have a quantity of 43K and 430K that I never seem to use, so being within 10% of the 39K and 470K in the BMVRH schematic I used them. While breadboarding this before building it I found that the 470K could be any value between 100K and 1M without much perceivable difference.

frequencycentral · April 22, 2009, 04:36:56 PM

Ben N · April 22, 2009, 06:26:13 PM

Which is the size the darn thing should have been in the first place, Mr. Matthews! Nice job, Rick.

biggy boy · April 22, 2009, 06:29:03 PM

Nice job as allways, so neat and tidy looking.

Glen

rousejeremy · October 17, 2009, 10:09:41 PM

Where did you get those great little black transistors?

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New Big Muff Perf Layout - very tiny and neat, minimal off-board wiring.