Search found 17 matches

by DonDougie
29 Apr 2014, 13:41
Forum: Pimp-My-Cheap-Pedal
Topic: BOSS DD2 or DD3 mods for tape echo sound
Replies: 62
Views: 73494

Re: BOSS DD2 or DD3 mods for tape echo sound

I recently bought a used DD3 with the intention to mod it, but apparently there is a new, all SMT revision C with a new chipset. The pots are all 50kb and have control voltages on them, so the cap across the pot mod is history :( Does anyone have a schematic for Rev.C? I can only find the older ones...
by DonDougie
04 Feb 2014, 10:16
Forum: Boutique Stompboxes dissected...
Topic: Earthquaker Devices - Ghost Echo [traced]
Replies: 98
Views: 60486

Re: Earthquaker Devices Ghost Echo [guts] [traced]

claytushaywood wrote:so i'm getting less than unity volume when the pedal is engaged.
I have the same problem. The layout seems to include the fix, but there is still a very noticeable drop in volume/gain when engaged. It's unuseable like this, which is a shame because otherwise it sounds really good.
by DonDougie
15 Oct 2013, 13:05
Forum: Boutique Stompboxes dissected...
Topic: Earthquaker Devices - Ghost Echo [traced]
Replies: 98
Views: 60486

Re: Earthquaker Devices Ghost Echo [guts] [traced]

I just finished my Ghost Echo but either I’m deaf or the dwell knob is too subtle for me or I’ve made a mistake. All three answers are quite possible. I tried to put in a parallel 39K to R22 (22K) push that resistor down to 14K to test John’s solution at Sabrotone’s (http://johnkvintageguitars.home...
by DonDougie
09 Oct 2013, 22:38
Forum: Boutique Stompboxes dissected...
Topic: Earthquaker Devices - Ghost Echo [traced]
Replies: 98
Views: 60486

Re: Earthquaker Devices Ghost Echo [guts] [traced]

induction wrote:Try removing the leg of R3 that currently goes to the output of the input buffer (g1 on the vero) and attaching it to Vb at c3 or f15. If that works, you can use an SPDT to switch them.
This works perfectly, thanks!
by DonDougie
09 Oct 2013, 16:49
Forum: Boutique Stompboxes dissected...
Topic: Earthquaker Devices - Ghost Echo [traced]
Replies: 98
Views: 60486

Re: Earthquaker Devices Ghost Echo [guts] [traced]

I built this one with Harald Sabro's layout and it sounds great, very eerie and atmospheric. Now when I tested it out of the box, something was shorting and I only got the wet signal coming through, which would be a neat feature to have. So, does anyone know where to add a kill-dry switch to this ci...
by DonDougie
24 Jun 2013, 11:40
Forum: DIY Projects
Topic: Shin-ei/Univox Uni-Vibe [Replica Files]
Replies: 504
Views: 155593

Re: [Replica Files] Shin-ei/Univox Uni-Vibe

Idea behind UV replica files, as well as with other projects on my website was to give possibility to build 1to1 clone of Univibe, without these silly mods and upgrades commonly seen in newly, commercial "reproduction". In short, my goal is to make projects stock - if it isn't broken, why...
by DonDougie
24 Jun 2013, 04:45
Forum: DIY Projects
Topic: Shin-ei/Univox Uni-Vibe [Replica Files]
Replies: 504
Views: 155593

Re: [Replica Files] Shin-ei/Univox Uni-Vibe

Just wondering any if there is any REAL difference in sound with this replica and the new madbean harbinger project? :?: I am tempted to go this route and have a PCB etched and use Sinners layout just because it is so spot on to the originals :hmmm: I was in the same boat and went with the Harbinge...
by DonDougie
10 Jun 2013, 10:01
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: SolaSound - Tone Bender MK1.5 [schematic]
Replies: 79
Views: 70156

Re: SolaSound - Tone Bender MK1.5 [schematic]

EW's right. Even 200-300uA for leakage ain't bad on those. Those shouldn't spit nearly as much a Fuzzrite. Were you tweaking the bias on Q1 or Q2? Some of them do have a sweet kind of nastyness going on, though. https://www.youtube.com/watch?v=NUWM2HjQsDA I only messed with the 8k2. With higher lea...
by DonDougie
07 Jun 2013, 10:50
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: SolaSound - Tone Bender MK1.5 [schematic]
Replies: 79
Views: 70156

Re: SolaSound - Tone Bender MK1.5 [schematic]

Electric Warrior wrote:100µA is very low leakage for an OC75. Most leak a lot more.
I know, mine average at about 250-300uA, that's why I used an AC128 for q1. I just like it better this way.
by DonDougie
07 Jun 2013, 08:23
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: SolaSound - Tone Bender MK1.5 [schematic]
Replies: 79
Views: 70156

Re: SolaSound - Tone Bender MK1.5 [schematic]

While swapping transistors around I've found that, while they bias up fine with a little tweaking, leaky ones (over, let's say, 100uA) didn't sound as smooth as low leakage ones with the same gains. The sound got kind of harsh and sputtery (not the decay, that was fine), a bit like a Fuzzrite. Still...
by DonDougie
06 Jun 2013, 16:14
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: SolaSound - Tone Bender MK1.5 [schematic]
Replies: 79
Views: 70156

Re: SolaSound - Tone Bender MK1.5 [schematic]

what gains did you used and what is Q2 colector voltage? Q1 is 69 hfe and q2 is 107, leakage for both around 100uA. I tried biasing q2 with a trimpot, and liked it best at around 5,5V, which happened to be around 8k :lol: I went through lots of gain configurations and q2 voltages (started at the us...
by DonDougie
05 Jun 2013, 20:46
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: SolaSound - Tone Bender MK1.5 [schematic]
Replies: 79
Views: 70156

Re: SolaSound - Tone Bender MK1.5 [schematic]

Finished mine yesterday with an AC128 in q1 and an OC75 for q2, sounds really good and biases up fine with the stock resistors. Like a low gain MKII on some settings with a more gradual cleanup than a FF. For me, it actually works better for early Zeppelin tones than a MKII :thumbsup
by DonDougie
30 May 2013, 16:42
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: SolaSound - Tone Bender MK1.5 [schematic]
Replies: 79
Views: 70156

Re: SolaSound - Tone Bender MK1.5 [schematic]

beedotman wrote:maybe to much gain and leakage, especially for Q2. Try lower hfe for both.
Thanks! I have 60 for q1 and 82 hfe for q2 in there now, it biases up fine and behaves much better than before. The cleanup is smoother and the attack pot got significantly more of a usable range.
by DonDougie
29 May 2013, 13:43
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: SolaSound - Tone Bender MK1.5 [schematic]
Replies: 79
Views: 70156

Re: SolaSound - Tone Bender MK1.5 [schematic]

Built one of these on perfboard with some oc75's. tested it with my tele but for some reason it doesn't sound as fuzzy as it should, however if I put a clean boost before it I get a nice amount of fuzz. Wondering is there any way within the circuit to boost the input going in without building a sep...
by DonDougie
28 Apr 2013, 13:04
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Sola Sound - Tone Bender Mark I (1965) [schematic]
Replies: 343
Views: 255404

Re: Sola Sound - Tone Bender Mark I (1965) [schematic]

Regarding transistor kits - I took the plunge and bought an OC75 MKI set from Smallbear recently for my MKI that I've been trying forever to bias properly. I don't know for sure, but it seems that these are only being selected with the hfe in mind, not the leakage. On the supplied schematic, they li...
by DonDougie
19 Mar 2013, 20:26
Forum: Boutique Stompboxes dissected...
Topic: EarthQuaker Devices - Hoof Fuzz
Replies: 66
Views: 27123

Re: EarthQuaker Devices - Hoof Fuzz

FYI, I just finished a Hoof based on Kit Rae's trace - don't know if anyone on here has seen it already, it's at http://www.bigmuffpage.com/Big_Muff_Pi_versions_schematics_part3.html and it is hands down the best sounding Muff type pedal I've ever built! Wonderfully gritty sounding and really fat hi...
by DonDougie
18 Sep 2012, 15:02
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Danelectro - CV-1 Cool Cat Vibe
Replies: 19
Views: 14788

Re: Danelectro Cool Cat CV-1 Vibe

just got one after they were out of stock for a while, and there seems to be a new revision! there is now a trimmer accessible through the battery compartment that goes from zero volume to a slight boost, so no need for the volume mod anymore :D thanks for listening, danelectro :applause: otherwise,...