Search found 57 matches

by jimbob_400
05 Oct 2011, 16:53
Forum: Boutique Stompboxes dissected...
Topic: Cusack - Tap A Whirl
Replies: 17
Views: 5063

Re: Cusack Tap A Whirl

I have a couple of cusack pedals and they're surface mount :) but agree with this being a very nice design, it's not even new - Cusack have been making tap tempo tremolo pedals for years!
by jimbob_400
29 May 2011, 16:53
Forum: Amplifiers
Topic: Simulating guitar speakers
Replies: 3
Views: 1809

Re: Simulating guitar speakers

Hi jimbob_400, Short answer, don't make something needlessly complex when it is not. Just use a circuit that dramatically cuts frequencies outside of the bandwidth of a guitar and it will be close enough. IMO, all that tripe about speaker breakup,, never failing to add every kind of teckninal sound...
by jimbob_400
25 May 2011, 15:00
Forum: Pedal Debugging & Troubleshooting Support
Topic: SHO Booster - crackles then cuts out
Replies: 7
Views: 3326

Re: SHO Booster - crackles then cuts out

Yitz wrote:replaced the BS170 with a new, carefully handled one. Exact same result.

Two Fried BS170s, or something else I'm missing...
If they're actually frying check the pinout. Also check resistor values, orientation of diodes and that you've done the layout correctly.
by jimbob_400
24 May 2011, 18:44
Forum: Pedal Debugging & Troubleshooting Support
Topic: SHO Booster - crackles then cuts out
Replies: 7
Views: 3326

Re: SHO Booster - crackles then cuts out

hmmm...ok. So how would I test either, with a multimeter? I've wondered if it's my weird combo of Zener diodes...can you say for certain that it's not? Cuz I'd love to shelve that worry. Diodes are a PITA to get in my neck of the woods. thanks so much! The diodes should be fine, they are just for s...
by jimbob_400
24 May 2011, 18:19
Forum: Pedal Debugging & Troubleshooting Support
Topic: SHO Booster - crackles then cuts out
Replies: 7
Views: 3326

Re: SHO Booster - crackles then cuts out

You've probably either killed the MOSFET with static or you've got a dodgy volume pot :)
by jimbob_400
24 May 2011, 17:10
Forum: Amplifiers
Topic: Simulating guitar speakers
Replies: 3
Views: 1809

Simulating guitar speakers

How easy or hard is it? My main problem is that they are mechanical devices and so they can't be simulated on a computer with a program so easily. The manafactures post a frequency response curve on their websites most of the time and so this would need to be replicated and then tweaked. There are t...
by jimbob_400
10 Jan 2011, 22:25
Forum: Amplifiers
Topic: Building My Dream Amp
Replies: 40
Views: 10252

Re: Building My Dream Amp

I'm in Montreal, Quebec. Did you bail on the Deluxe? I'd like to build a Marshall someday. Where are you? :D When I asked where are you I was more - where are you with your build, more like - how far you are with it :D It's my poor English, I'm sorry mate I'm still waiting for more parts to come, I...
by jimbob_400
08 Jan 2011, 21:46
Forum: Printed/Published Online Designs
Topic: Beavis Loop and Ohnoho?
Replies: 3
Views: 1875

Re: Beavis Loop and Ohnoho?

Hey all, If i take this. http://www.beavisaudio.com/techpages/PedalHacker/LooperWithFeedbackLoop.gif remove the SPDT, and change the 3PDT to a momentary, do I have a Chk chk Boom? What makes some feedback loopers fade out instead of cut off when the switch is released? Thanks in advance! Dobo not q...
by jimbob_400
11 Dec 2010, 23:04
Forum: Parts & Tools Sourcing & Trading
Topic: Where can I find a knob like this?
Replies: 7
Views: 1855

Re: Where can I find a knob like this?

have you tried searching around for acoustic guitar knobs?

I also have a Taylor acoustic/electric with these knobs on and was thinking the same a while ago. They're quite attractive and you're right, would be hard to bump with your feet :)
by jimbob_400
07 Dec 2010, 12:17
Forum: Pedal Debugging & Troubleshooting Support
Topic: Rangemaster cap question (Madbean RM)
Replies: 4
Views: 2398

Re: Rangemaster cap question (Madbean RM)

Hey all, Quick question. I put together a mad bean Rangemaster with an OC 44 I bought from small bear. It calls for sprague atom electro caps. I didnt have any of these and it says that only the 47uF caps HAVE to be electro. So I used regular axial electro caps from my local electronics store (Norv...
by jimbob_400
06 Dec 2010, 23:06
Forum: Pimp-My-Cheap-Pedal
Topic: DOD250: adding a tone control
Replies: 9
Views: 5863

Re: DOD250: adding a tone control

or just use my output buffer suggestion but use the transistor to increase the gain of the signal a bit to compensate for the tone stack.
by jimbob_400
04 Dec 2010, 11:36
Forum: Pimp-My-Cheap-Pedal
Topic: DOD250: adding a tone control
Replies: 9
Views: 5863

Re: DOD250: adding a tone control

I'm still really enjoying messing around with my DOD250. I've been reading about tone stacks on pages like this: http://amps.zugster.net/articles/tone-stacks and http://www.beavisaudio.com/techpages/BigMuffToneControl/ But, being a noob, I can't really grasp how I would add a tone control to the 25...
by jimbob_400
04 Dec 2010, 11:28
Forum: Pimp-My-Cheap-Pedal
Topic: Fetzer Valve in a OD1 clone?
Replies: 7
Views: 4087

Re: Fetzer Valve in a OD1 clone?

ChristoMephisto wrote:That's perfect!! Wasn't sure about leaving the 10k resistor in or not
Went to go dig out some J201s i thought i had, they were BS170, and found a couple 2N5457
Might try those and order a few J201s
2N5457s will work just fine! Good luck.
by jimbob_400
02 Dec 2010, 23:10
Forum: Pimp-My-Cheap-Pedal
Topic: Fetzer Valve in a OD1 clone?
Replies: 7
Views: 4087

Re: Fetzer Valve in a OD1 clone?

Here's a link to the OD1, pretty much like the SD1/TS http://www.hobby-hour.com/electronics/s/od1-overdrive.php So I can basically replace R7 on the OD1 with the Fetzer from the 33k input resistor to the 47n cap at the end? I get the idea of the 10uf cap, at the input of the Fetzer part? Ahh okay, ...
by jimbob_400
02 Dec 2010, 13:15
Forum: Pimp-My-Cheap-Pedal
Topic: Fetzer Valve in a OD1 clone?
Replies: 7
Views: 4087

Re: Fetzer Valve in a OD1 clone?

I'm not quite sure what you're saying in places. After the clipping section/feedback loop part of the circuit insert a 10uF DC block cap, insert your fetzer valve leaving out the volume control. From the 47n cap carry on the circuit to output buffer.
by jimbob_400
02 Dec 2010, 12:56
Forum: Amplifiers
Topic: Ringing sound from Laney VC30
Replies: 7
Views: 2253

Re: Ringing sound from Laney VC30

tasteless wrote:Ah ! - Sounds like a dodgy filter cap to me , These can also be microphonic.
Ill look into this [smilie=rlp_smilie_242.gif]
by jimbob_400
30 Nov 2010, 16:40
Forum: Amplifiers
Topic: Ringing sound from Laney VC30
Replies: 7
Views: 2253

Re: Ringing sound from Laney VC30

Guys it's definitely not the valves, I know what a dying valve sounds like and have had plenty of experience with micro phonic valves. I tried another VC30 today and it had the exact same problem as my own. I think it's down to the circuit design which is a shame... The next problem is that now my o...
by jimbob_400
29 Nov 2010, 23:15
Forum: Amplifiers
Topic: Ringing sound from Laney VC30
Replies: 7
Views: 2253

Re: Ringing sound from Laney VC30

Uh?! Excuse my questions if you've already answered above and I didn't get you right: - Is it coming from the speaker, I mean is the ringing added to your sound and played by the speaker? Sorry if anything was unclear :oops: No it is not coming from the speaker, I have tried two separate speakers a...
by jimbob_400
29 Nov 2010, 20:03
Forum: Amplifiers
Topic: Ringing sound from Laney VC30
Replies: 7
Views: 2253

Ringing sound from Laney VC30

I've got this problem with a VC30 that whenever I play a high G on the e string (or a g anywhere else, but it's most noticeable here) I get a very high ringing harmonic. Now it's not the valves, double checked all of them by swapping in and out working valves, and it's not the speaker. I've got the ...