Search found 983 matches

by briggs
18 May 2012, 18:12
Forum: Ready-To-Build Effect Projects
Topic: Fred Briggs - Super OCD
Replies: 62
Views: 6895

Re: Fred Briggs - Super OCD

Nice, just build this one. It's still pretty dark but maybe that's what the OCD is like, I don't know the original! I'm using a 22nF tone cap, BS170s, bass trim pot completely closed and the tone pot almost completely open. This was with a Strat. The boost section is pretty awesome though, it can r...
by briggs
18 May 2012, 18:07
Forum: Ready-To-Build Effect Projects
Topic: Fred Briggs Fuzz (Fuzz Facey with Saggy? - Voltage)
Replies: 21
Views: 1516

Re: Fred Briggs Fuzz (Fuzz Facey with Saggy? - Voltage)

Piggybacking won't work. But there are other things you can do with those transistors. Check out my Rangemaster MKII for a trick I learnt from petemoore regarding playing with darlington pairs that is cool fun :)
by briggs
18 May 2012, 17:54
Forum: Boutique Stompboxes dissected...
Topic: Lovepedal - Super 6 [traced]
Replies: 83
Views: 20750

Re: Lovepedal - Super 6 [traced]

Hello peeps - yeah, I drew 100nF caps where there should be 10n caps. Sorry bout that one :slap: The tone control works by creating a filter network between the output cap, the 100k pot, the 10n cap and the volume control. It's all about capacitor reactance. Basically as you turn the tone control up...
by briggs
19 Apr 2012, 20:10
Forum: Boutique Stompboxes dissected...
Topic: Resonant Manifold Drive
Replies: 53
Views: 7179

Re: Resonant Manifold Drive

Very nice work, looking forward to seeing a schemo :mrgreen:
by briggs
19 Apr 2012, 20:06
Forum: Boutique Stompboxes dissected...
Topic: Rothwell Hellbender ?
Replies: 11
Views: 2998

Re: Rothwell Hellbender ?

I like this one: https://www.youtube.com/watch?v=u-PwkBkqHrk&feature=related They never reference the clean signal, but it sounds pretty clean when they lower the gain on the pedal. - Sounds sweet! TL072, zeners in feedback loop, & I guess, some careful tone shaping.. I'd guess they're using both h...
by briggs
17 Apr 2012, 13:41
Forum: Ready-To-Build Effect Projects
Topic: Fred Briggs - Unknown Fuzz
Replies: 8
Views: 681

Re: Fred Briggs - Unknown Fuzz

Hi Mbas, I just set the 100k trim by ear to what I liked best and then removed the transistors and used a DMM with a hfe measuring function to measure the gain of the piggybacked transistors. I'm glad you like the pedal, it's one of my favourite fuzzes :blackeye
by briggs
04 Apr 2012, 11:18
Forum: Ready-To-Build Effect Projects
Topic: Fred Briggs - E11even - Marshall Boost/OD
Replies: 47
Views: 2128

Re: Fred Briggs - E11even - Marshall Boost/OD

The resistor would go to where the bias pot wires went just take the wires out and solder the resistor to the vero board in their place. The master volume connection (the light blue one) just needs to be soldered to where it originally goes on the board - the output side of the 100nf cap.
by briggs
04 Apr 2012, 10:08
Forum: Diodes & LEDs
Topic: Clipping Diodes - BAT41 vs. BAT46?
Replies: 11
Views: 18299

Re: Clipping Diodes - BAT41 vs. BAT46?

other way round - two diodes in series means less clipping (half as much)
by briggs
04 Apr 2012, 10:06
Forum: Transistors
Topic: Ge Transistors
Replies: 9
Views: 9473

Re: Ge Transistors

https://www.freestompboxes.org/viewtopic.php?f=13&t=16858 - Perfect gain ranges for the Rangemaster mkII
by briggs
03 Apr 2012, 23:41
Forum: Ready-To-Build Effect Projects
Topic: Fred Briggs - E11even - Marshall Boost/OD
Replies: 47
Views: 2128

Re: Fred Briggs - E11even - Marshall Boost/OD

You should be able to pick out exactly what it does then, it may be the case that you can just hardwire the diodes on all the time. It depends on what you like!
by briggs
03 Apr 2012, 15:15
Forum: Ready-To-Build Effect Projects
Topic: Fred Briggs - Rangemaster MKII
Replies: 5
Views: 1080

Re: Fred Briggs - Rangemaster

Here's some pictures of the completed build :thumbsup
by briggs
03 Apr 2012, 15:13
Forum: Ready-To-Build Effect Projects
Topic: Fred Briggs - E11even - Marshall Boost/OD
Replies: 47
Views: 2128

Re: Fred Briggs - E11even - Marshall Boost/OD

Yeah, the vero looks correct to me. Here's a tip - if you are already playing the amp with a fair amount of gain you may not hear the transistion. If you turn your amp to completely clean and then engage to boost (set it to max gain) then play with the bias knob. As you lower the headroom you'll hea...
by briggs
03 Apr 2012, 14:48
Forum: Ready-To-Build Effect Projects
Topic: Fred Briggs - E11even - Marshall Boost/OD
Replies: 47
Views: 2128

Re: Fred Briggs - E11even - Marshall Boost/OD

I think the 'Face is my overall favourite of the three. The "Bias" control is just a saturation control for the diodes, increasing the resistance between the signal and the diodes should create a more dynamic, less clipped tone...
by briggs
03 Apr 2012, 13:14
Forum: Ready-To-Build Effect Projects
Topic: Fred Briggs - E11even - Marshall Boost/OD
Replies: 47
Views: 2128

Re: Fred Briggs - E11even - Marshall Boost/OD

Yeah the two Bat41 are okay but I had the other diode the wrong way so I flipped that and the pedal works. Fred, I gotta tell you. This circuit sounds amazing! I've bee playing with both my 1987 Fender Strat Plus and My les Paul thorugh a 1984 JCM800 2204 and it rocks! Here's how the pedal looks li...
by briggs
03 Apr 2012, 11:14
Forum: Diodes & LEDs
Topic: Clipping Diodes - BAT41 vs. BAT46?
Replies: 11
Views: 18299

Re: Clipping Diodes - BAT41 vs. BAT46?

jtn191 wrote:diodes in series raise the clipping threshold, giving you a more dynamic clipping pattern
Yep, so if the forward voltage of one diode is 0.25v two in series will require 0.5v to turn on (clip).
by briggs
02 Apr 2012, 16:50
Forum: Diodes & LEDs
Topic: Clipping Diodes - BAT41 vs. BAT46?
Replies: 11
Views: 18299

Re: Clipping Diodes - BAT41 vs. BAT46?

It's all about the diode's forward voltage (how much voltage is needed to turn them on.). BAT46 require around 0.25v to turn on while BAT41 require around 0.4v to turn on. Therefore the BAT46 will turn on sooner and clip more of the signal than BAT41 diodes will.
by briggs
30 Mar 2012, 21:18
Forum: Ready-To-Build Effect Projects
Topic: Fred Briggs - Rangemaster MKII
Replies: 5
Views: 1080

Re: Fred Briggs - Rangemaster

It's a really simple circuit that does so much more than the sum of it's parts. Well worth a build - just buy up some cheap russian germanium and go mental - I got 50 MP14 trannys for a £10 shipped, well worth it..
by briggs
30 Mar 2012, 17:55
Forum: Boutique Stompboxes dissected...
Topic: Wampler Faux Tape Echo
Replies: 58
Views: 15058

Re: Wampler Faux Tape Echo

Listening to the demos it just sounds like an envelope follower driving the vactrol which is either 1) over the delay pot (don't think it's this one) or 2) over a small resistor, maybe 3k3 to 10k (like a depth control) that is switched in series with the delay control.
by briggs
30 Mar 2012, 17:12
Forum: Ready-To-Build Effect Projects
Topic: Fred Briggs - Rangemaster MKII
Replies: 5
Views: 1080

Fred Briggs - Rangemaster MKII

briggs_rangemaster.jpg This is a great rangemaster variant based on mods by Pete Moore and David Main. The Darlington transistor arangement allows you to dial in the aggression of the circuit. I love it, I breadboarded it up in a few hours and now I'm boxing it up - it's that good at what it does! ...
by briggs
30 Mar 2012, 13:16
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor Tiny Orange Phaser (gutshots)
Replies: 29
Views: 5095

Re: Mad Professor Tiny Orange Phaser (gutshots)

Also, I can't get the damn knobs off to check the values of the pots. They have a small screw, but even then they feeled like knurled shafts, because they are stuck hard. I've struck this with a pedal a guy sent me to check over.. it was a GGG kit he'd made, and the knobs were insanely tight even w...