IC: PIC12F683
Latching relay: ATQ216
Optocoupler labelling seems to be sanded off

I can send more pictures if you like ...

Schematic Heaven has a new URL:

http://schematicheaven.net/

I've just learned that paypal charges $10 monthly for adding recurring payments as a feature to your account. In addition to some other pretty questionable charges. Why does it have to be a monthly contribution and therefore raise problems with Paypal? Would a one-time (annual) donation not achieve...

Goodness gracious ... I am glad you´re back ... I had sleepless nights over the past days

Yes, please give FSB users the option to donate to the maintenance of the domain by Paypal ...

Although the type of cap can have influence in the behaviour of a circuit that's virtually not the case in this circuit. I was pretty certain that, when tracing this pedal, there would be a lot of questions on the type, brand aor whatsoever of the components used. Many assume that ages were spent o...

I would use something like the other suggested Cathode follower Check the schematics of the Vox FX loop, the Valvulator or the Dumbleator. I used something like this, with a tad more gain, on my newest amp build to overcome the (impedance) problem of 8 powertubes :D I'm bringing this post back from...

Hasn´t anyone checked this site for another PCB layout of the F2-B aka Fender Showman preamp ? http://www.lorcan.me/projects/tube-bass-preamp/ This supplies the PSU and tube board as PCBs. However I´d use a CF after the last tube stage and not just a pot as suggested on the website. BTW, the "i...

Both my BRTO plugpacks are 16V AC/ 1.25 A types, and they seem to work fine, I think I paid about $16.00 or so for them, so I agree, they aren't cheap..... :) I wish they would be $16.00 over here, I would have bought a pair straight away. The 15VAC/1A I found the other day costs 38.00 AUD / 51.50 ...

After two o´clock the pedal becomes really grainy, growly, oversaturated which does not sound so nice to me. Perhaps there is a mistake ... :hmmm: ... any ideas to tame the gain? It is perfect with the DRIVE set between 10 and 1 o´clock, although you can have nice bluesy tones at low gain settings ...

Have you tried your build out, and how does it sound?..... :) Whoo-hee ! Goodness, that pedal´s middle name is Raaawk! :horsey: I have now tried it out with the old National 12AX7 (from the unused ADA MP-1) which gives 12.97VAC at the heaters. Also a TAD (Tube Amp Doctor) 12AX7 @ 12.63VAC and a TAD...

I had the same issue with the in and out sockets that I wanted to use, but I found a way to solder the sockets to the PCB, here's what you do: 1,With a pair of clippers, cut off the thin part of the socket's solder terminals that normally go through holes on the PCB. 2,Cut some Tinned Copper Wire i...

Have you tried your build out, and how does it sound?..... :) No, I haven´t. I have still not found a source for proper jacks. Everything I find over here is wider as the given dimensions on Bajaman´s PCB. Even bending those little legs won´t help. :( The reason why I have opted for an 18VAC transf...

Personally, I'd be happy with 12.97 V AC on the heater pins, that's only about .27 V higher than in my build, which is nothing to worry about, probably well within tolerance.... :) i agree, that resistor sure does get hot, I'm using a 5Watt 33 Ohm Ceramic Wirewound type in my build, and it gets pre...

No worries, you might want to increase the value of the resistor till you get about 12.7V AC on pins 4 and 5 of the Tube socket, 14.1V AC sounds a little bit too much heater voltage... :) Believe me, I have made much worse mistakes than that, one time I went to switch on my little guitar amp, and i...

No worries, you might want to increase the value of the resistor till you get about 12.7V AC on pins 4 and 5 of the Tube socket, 14.1V AC sounds a little bit too much heater voltage... :) Believe me, I have made much worse mistakes than that, one time I went to switch on my little guitar amp, and i...

I assume that you do have the 12AX7 / ECC83 tube inserted in the socket :?: If not - plug it in and measure the AC voltage at the pins again :wink: bajaman errrr ... it is now 14.1VAC with a 12AX7 in the tube socket ... http://www.smiliemania.de/smilie.php?smile_ID=7031 ... that much for my first a...

Hmmmmm....that's unusual, it almost sounds like the resistor is acting like a dead short, I'm using a 16V AC/1.25 A plugpack with my build, I get about 20V AC unloaded, and 12.7V AC across pins 4 and 5 of the Tube with a 33 Ohm/5 Watt resistor..... :) It could be that you might have something short...

I´m testing my two Baja boards and come up with a unusual voltage at the heater pins (4&5). I use an 18VAC wallwart @ 1.125A, which gives 20.2VAC (unloaded). The heater resistor is a 39R/5W type but I read 20.1VAC at the heater pins! Just like there wouldn´t be a resistor at all ... :scratch: Th...

Hello friends These are mods I have done on several customers Boss DD2 or DD3 pedals to obtain a more realistic tape echo sounding device. naturally - only a tape echo sounds like a tape echo :wink: , but these mods will certainly get you closer to a tape echo sound (without the noisy and inconveni...

I like vintage stuff in general, especially when it's dirty, rusty and decrepit. Just bought my first bike, a '72 Honda CB350. It's been sitting in a shed for some 20 years and now it's back on the road. The BS250 should be fine. Its "Rds on" is around 10 ohms, my Barbershops pull 5mA wit...