Recent content by goldenGeek

I forgot to mention that I also tried to pull tubes. If we look at the signal chain for the clean channel it uses V1a before gain, then V4b and V4a before channel master, then into V3b and finally into V6a/b for PI. Pulling V6 remove all hiss. Pulling V3 remove all hiss. Pulling V4 remove almost...

I recently got this Mesa DC-2 (studio caliber) in for a repair. I've been through a lot of Mesas the last few years and I really love them when they work, but they are usually a real bi*$& to work at. So - I thought this one only had bad tubes, it had a lot of white noise and crackling and...

(I edited my post a bit, it was a tad "messy") So I got my second Subway Blues a while ago (I sold the first one a year back). I bougth it for about 60 bucks since it clearly was dead and it was missing the speaker and cabinet (just the chassis and reverb pan), but I figured at least one of the...

I know this is a necro-bump, but did you ever find out what happened to the tone-controls? I have mocked around in mine this week to get rid of some bad noise and now it also has this weird "error" where the tone controls does almost nothing. The treble acts more or less as a gain control and...

I'm obviously not very patient. I had to fiddle with the amp again while waiting for someone to chime in :-) Okay, so I chopsticked a bit and some capacitors in the input section is really microphonic. There is a loud tapping in the speaker when I tap the 20, 120 and 250pf before V1a. Is this...

So I tried replacing the .01 with a higer value, I didnt have a .68 so I put in a .1, it should have made some improvements if that was the problem but the noise is just the same. I also tried to replace the volume pot with a new one but it did not improve anything. I recorded the noise...

Hello :) I am currently trying to figure out a Subway Blues thats humming too much. I have read some posts about the .01uf mod (replace with .68uf), but I think the problem with this amp is earlier in the path. I will replace the cap anyway, but heres the problem: There is a loud static that...

Hello @kruspemsv, I finally checked my pedal again and the solo-part is right (labeled effects on your drawing), open or connected to ground with a LED in series. The channel switching is wrong, and is done like this: When the switch is closed (pin connected directly to gound) the lead channel...

I never heard back from anyone, but I finally built a footswitch thats working. Its really simple - (I cant remember which function is tip or sleeve, but you'll figure that out. Lets just say thet tip is channel and ring is solo for now, but it might be the other way around). The solo-function...

I contacted Mesa but they wont give me any details about the original switch, and Im not going to pay 55$ for the pedal and god knows how much for shipping and taxes to Norway. Does anybody have the original switch and the time to open it up and send me a picture? Or can someone please tell me...

I've replaced all the large filtercaps (220uf, 30uf and 10uf), filter for the 6.3v DC (6800uf, replaced with 10000uf) and the bias caps 220uf/63V. I also , as previously noted, cleaned up the diode area. The hum is gone and the amp is as good as new.

I'm getting ready to build a switch for my solo 50 series 1, standard stereo-jack on the amp for the switch. Did you just connect the LEDs to the switch/cable in the pedal or did you add more components (maybe resistors to bring down the voltage)?

Hello :) I'm thinking of building a footswitch for my series 1 single rec. I have lots of pedal parts around so I think I should be able to build a pedal "for free". But does anybody have a schematic for the pedal, so that I get the LEDs and stuff about right? Or can anybody post an internal pic...

Thanks afu, I'll dig into that. I cleaned up the diode area - I replaced the diodes and resoldered from the back, it looks like it was done from the front the last time. I also ordered new filter caps, both power and for the 6.3V stuff (6800uf, but I ordered some 10000uf as well as I recall the...

I'm relatively confident with point to point amps, but now I've got a Mesa Single Rectifier (series 1 (rev e, I think), solo 50) on the bench. I've worked little with PCB-base amps before, but this seems fairly okay because all pots and connectors are wired off board. Now to the problem - theres...