hwy98 problems

km-r · April 12, 2007, 04:22:23 AM

when basicaudio[i think its him] built his hwy89 i decided to build mine...

but the problem... it would be better if i have a sound clip but... im sorry.
the distortion is good and it has enough volume to push an amp into something like a metalzone distortion.

but the distortion seems to have a "doubling" effect... [even at low output volume]
which i think is not included in the sound package...
its like two guitars are played into the same dist box.

btw, i used 2n5088 for q1 and BC549's for q2 and 3...
could ths be because of the substitution? there are no more 2n5088's in our locale...

pin voltages:

Q1: e 1.0v b 5v c 4.25v
Q2: e 0.9v b 0.03v c9.5v
Q3: e 1.9v b 3.5v c 4.3v

the supply was measured at 9.5v

MartyMart · April 12, 2007, 04:30:56 AM

PCB/Vero or perf ?
I've had it once or twice with a "clean" trace of the signal going where it shouldn't !

MM

km-r · April 12, 2007, 04:52:24 AM

its on a 3x2 pcb... tad crowdy?
nah... theres space left actually...

so, its debug time?

John Lyons · April 12, 2007, 01:13:12 PM

Yeah, just double check everything and see what you find. Maybe a solder brige of tiny hairline bridge with something touching where it should not. Which layout did you use?

John

km-r · April 15, 2007, 11:30:44 PM

i used the original layout given by mr hammond...

i even dont need string grounding with this one 'cause the hum was wicked...

John Lyons · April 16, 2007, 11:50:25 AM

As far as I know Doug never posted a layout for the Hwy 89.

oldrocker · April 16, 2007, 11:59:07 AM

Keep troubleshooting this pedal because you won't regret it. This is a great sounding pedal and I use it all the time. The power coming out of this thing is amazing.

John Lyons · April 16, 2007, 12:02:04 PM

My point was that an actual layout diagram was never drawn up and posted (to my knowledege).
I posted the schematic when doug said it was ok to do so.
So which layout did you use km-r?

John

km-r · April 19, 2007, 01:16:45 AM

its was the one doug gave me....

ok, i tweaked around the sections... i tried bypassing the tone section and the noise was reduced, it was ok.

then i tried fitting the tone components WITHOUT the pots [leaving pot pads open] and the volume was reduced, no noise.

could the pots be the problem? they seem to be in perfect performance condiiton [checked with VOM]

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hwy98 problems