Search found 44 matches
- Sun Feb 14, 2021 11:50 pm
- Forum: Marshall Discussion
- Topic: Channel Switching JCM800 Design? + BIAS pot question
- Replies: 103
- Views: 29604
Re: Channel Switching JCM800 Design? + BIAS pot question
The 3.3 nF cap from the 16R OT tap to the presence pot, is this parallel to the NFB coming off of the 8R tap? Do you have a schematic? No, my NFB purple wire is connected to 16-ohm tap, and I just put the cap in series with the purple wire to the presence pot. It is not in now, but I think it would...
- Sat Jan 30, 2021 7:39 pm
- Forum: Marshall Discussion
- Topic: Channel Switching JCM800 Design? + BIAS pot question
- Replies: 103
- Views: 29604
Re: Channel Switching JCM800 Design? + BIAS pot question
I have been resurrecting my original JCM2204 as well, and I have been through many of the changes as the OP here. I found the treble bleed cap (I still have trouble with the names of each part, sorry) that goes between pins 1 & 2 on the MV is necessary, if I remove it MY amp gets very unsteady - osc...
- Mon Jan 02, 2017 5:33 pm
- Forum: Technical Discussion
- Topic: Effect Pedal building
- Replies: 431
- Views: 268524
Some of my pedal builds
It has been a long time since I posted here, so I thought I would drop by and show a few of my latest projects. I am now using a pedal board where the majority of pedals are self-made. This below is a distortion pedal using red LEDs for diode clipping. [img:408:640]http://i1304.photobucket.com/album...
- Sun Sep 14, 2014 5:53 pm
- Forum: Technical Discussion
- Topic: Effect Pedal building
- Replies: 431
- Views: 268524
Re: Effect Pedal building
So, I am not sure, but I think you are saying the aforementioned changes are part of the silver pony layout. Is that right. That seems to "jive" with the preface here at my favorite site: http://tagboardeffects.blogspot.com/2014/07/klon-centaur-silver-edition.html Here they note a couple of swapped ...
- Fri Sep 12, 2014 5:13 pm
- Forum: Technical Discussion
- Topic: Effect Pedal building
- Replies: 431
- Views: 268524
Re: Effect Pedal building
Reply to PlayOnIt about the KlonE changes... I don't know if you noticed, but the thread from another board that you cited for certain changes to the KlonE schematic (which I went and read) has now been taken down! Is it possible someone did not want those changes "out" in the public domain? I had a...
- Thu Sep 04, 2014 9:36 pm
- Forum: Technical Discussion
- Topic: Effect Pedal building
- Replies: 431
- Views: 268524
Re: Effect Pedal building
Playonit - I read the threads, but I would really appreciate it if you could get a little more specific and post the changes here. (with the specific R numbers, possibly). My KlonE comes from a guy who told me he de-gooped his own Klon back in the early 90s. However, while I have not compared them s...
- Mon Sep 01, 2014 11:12 pm
- Forum: Technical Discussion
- Topic: Effect Pedal building
- Replies: 431
- Views: 268524
Re: Effect Pedal building
Anyone ever struggle with the LED - CLR relationship? I could never get an LED with a following CLR (connected to cathode) to light up. Finally, I got in an argument about with someone online, and tested it six times on my breadboard and was convinced I was right, that it couldn't be done. Only afte...
- Mon Sep 01, 2014 11:05 pm
- Forum: Technical Discussion
- Topic: Effect Pedal building
- Replies: 431
- Views: 268524
Re: Effect Pedal building
Thanks playonit, I will look at the =KlonE changes you noted.
- Mon Aug 25, 2014 7:14 pm
- Forum: Technical Discussion
- Topic: Effect Pedal building
- Replies: 431
- Views: 268524
Re: Effect Pedal building
Looks like you used those vintage transistors Ge Darlingtons - were they hard to find or work with? I have been making pedals myself lately but just spent two full days on a dual FET design with a power pump that I never got off the ground - very frustrating. Here is my first build - a KlonE [img:10...
- Thu Aug 21, 2014 4:38 pm
- Forum: Technical Discussion
- Topic: CLR for 2.2 mm LED
- Replies: 10
- Views: 1368
Re: CLR for 2.2 mm LED
Thank you all for your help. I tried going +9 - |>| - CLR - GRND. but it just never worked for me. Not sure why. Now I am wondering..... I see another way to wire this PCB so the CLR comes before the LED but that would mean bringing +9 right to the foot switch PCB. Does anyone think that could cause...
- Wed Aug 20, 2014 6:47 pm
- Forum: Technical Discussion
- Topic: CLR for 2.2 mm LED
- Replies: 10
- Views: 1368
Re: CLR for 2.2 mm LED
Thx - I got it to work, it's 2.2k but I have another circuit problem. I have a small PCB for a foot switch that has a space for a CLR... one leg of that CLR attaches to the LED - and that's all I have. So, I put in a 2.2 CLR and a 2.1mm red LED in the PCB attaching the CLR to + of the LED. The neg l...
- Wed Aug 20, 2014 5:59 pm
- Forum: Technical Discussion
- Topic: CLR for 2.2 mm LED
- Replies: 10
- Views: 1368
CLR for 2.2 mm LED
what size resistor do I use for a 2.2 mm (tiny) LED?
Nevermind - I got it 2.2k - but I have something else making it not work. thx anyway.
Nevermind - I got it 2.2k - but I have something else making it not work. thx anyway.
- Mon Aug 11, 2014 5:27 am
- Forum: Technical Discussion
- Topic: F*#king 1/4" phone plugs!
- Replies: 47
- Views: 10065
Re: F*#king 1/4" phone plugs!
Take a look at the way I got ripped off a couple weeks ago: This listing for a " Peavey Jack " made by Switchcraft (this is NOT a switchcraft issue) - the part number is "12B" - so I though I was buying package of 12 connectors for $12.99. I received ONE connector - and there was a handling charge -...
- Mon Aug 11, 2014 1:36 am
- Forum: Technical Discussion
- Topic: Effect Pedal building
- Replies: 431
- Views: 268524
Re: Effect Pedal building
I just got a huge shipment from tayda, too. I had it sitting in my shopping cart for a week waiting for them to post a new coupon code. Yeah - an amp. I do want to build one. I would like to build a good one-channel amp that takes pedals really well. I like a Marshall sound, so I am thinking a 2204 ...
- Sun Aug 10, 2014 9:33 pm
- Forum: Technical Discussion
- Topic: Effect Pedal building
- Replies: 431
- Views: 268524
Re: Effect Pedal building
Vendor recommendations - pedal parts: Three places for what I see as comparatively cheap parts: http://www.bitcheslovemyswitches.com/ - for enclosures & footswitches http://guitar-fx-layouts.42897.x6.nabble.com/3PDT-true-bypass-wiring-pcb-s-tp6496.html For PCBs for 3pdt FOOT SWITCHES. $30 for 50 boa...