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ChristoMephisto
Platinum Member
Canada
1288 Posts |
 Posted - 12/19/2007 : 15:50:56
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Sounds like a good idea Dr.Bob
Does anyone know how to convert the ASA to take a PSA adapter?
Any schems of these pedals? |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 12/19/2007 : 16:02:14
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Hi Christo
basically it's just an
Input filter electro cap after the bridge or 4 diodes, feeding an
LM7809 --- Positive 9V 3 terminal regulator, then to
an output electro cap about 10uf - 100uf, don't need a big cap here.
ans I believe that also have a small value inter M205 fuse, in case of pedals shorts.
There are some pics on the forum, of one about 18 months ago,
posted by RRV-10, if my old memory till serves me?
He lives not too far from my place here in Oz.
Regards Dr. Bob |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 12/19/2007 : 16:08:51
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Hi Christo
Perhaps Bossarea, will move my other post over to here.
Else we could do a cut & paste.
I have some time off for the silly season,
I might see if that idea of mine, about increasing the Flux Density near the Hall Effect Sensor, has any musically beneficial effect, or just saturates the IC quicker....
Or is just a waste of time.. 
Is your PD-1 Rocker distortion, still working OK?
Regards Dr. Bob |
Edited by - Dr. Bob on 12/19/2007 16:10:01 |
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ChristoMephisto
Platinum Member
Canada
1288 Posts |
Posted - 01/11/2008 : 18:47:35
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Did my first pedal repair yesterday on a pedal that wasn't mine, and it worked out great. Meet this guy through a sale, and he had a PW-1 that had a broken on/off switch. Replaced the switch from a project and she was wah'n again. Also the standard cleaning of the jacks and pots.
The two trim pots needed tweeking, they were both cranked up full. Thanks to DR.Bob who sent me pics a while back of his Rocker Wah and some others online. One is for the gain, and the other seems to adjust the resonance. Matched them up in position, and didn't need much after that.
The Hall Sensor I found interesting. Other than one side was rubbing directly with the sensor. The magnets prongs went to the center of the sensor, his board was pushed all the way in. Compared to my PD-1, that went to the bottom of my sensor with the toe down, and the board wasn't fully in. It wasn't encompassing the sensor. Since they bond the sensor board in place, a pair of washers under the magnet should raise it up enough.
Here's the weird thing...
Workes fine with batteries on and off, but in a daisy chain, and off, there's a bit of 'wah-leakage' that works with the pedal as you move it.
Hows that for bypass.
Dr. Bob, what is Flux Density? a stronger magnet field?
Cheers |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 01/12/2008 : 08:39:14
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Hi Christo
-- Quote --
Dr. Bob, what is Flux Density? a stronger magnet field?
-- end quote ---
Yes is the simple answer.
When you tweaked the pots, did it wah better, because mine is so very subtle compared to a Cry Baby.
In fact it's so subtle it's almost unusable.
And I just basically keep it as a collectors piece. 
Do you think the stronger magnetic field worked?
Did his have as much wah as a C-baby?
Mine is unmarked & appears to be un-tampered with.
You mention, you obtained some other info, from some other people, can you PM it to me, if it's of any value.
Regards Dr. Bob |
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ChristoMephisto
Platinum Member
Canada
1288 Posts |
Posted - 01/12/2008 : 18:30:54
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Hey Dr.Bob,
other than the pics you sent me, found a pic at
http://filters.muziq.be/model/boss/pw1
figuring it was a trim pot, it wouldn't be too far off from the pics.
The wahhing itself was good, not the best. Like the Lo setting the best.
Still like my modded Crybaby better.
Does the magnet prongs encompass your sensor, couldn't tell from your pics. Maybe the magnet itself needs 'recharging' from sitting unused.
Guessing it would have more effect since its closer to the sensor.
Gotta love Wiki |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 01/13/2008 : 03:50:17
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Hi Christo
My PW-1 does Jack in the LO position, same in the HI position
and it's very subtle in the MID position.
As for the prongs & the Hall Sensor, I will take a look later.
Just for you interest, on my unit, the effect switch take a fair amount of force to turn on, you really have to put your weight behind it, there is no adjustment for this, that I can see.
And as I mentioned, my unit was basically in storage & un-played & unmarked.
Did you find the effect to be subtle?
You also mentioned that the Hall sensor PCB was all the way down in the mounting frame, mine is at an angle & a few millimeters above fully seated.
Like on all the Rocker pedals, thay glue this PCB into it's mounts.
Maybe mine moved while it was drying on the production line,
But I seem to remember tht on your PD-1 it was a little high as well.
Regards Dr. Bob |
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ChristoMephisto
Platinum Member
Canada
1288 Posts |
Posted - 01/13/2008 : 19:01:16
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After I replaced the switch, I noticed it didn't reach the pedal. Then noticed there was a missing foam/bumper. Took some regular masking take and layered up a few 1" strips to make one. I had to remove a few layers, as it was too sensitive and turned it off at the slightest touch.
Seems there is no standard to where the sensor pcb is mounted, but seems logical all the way in. His was an earlier model from Oct '82, I got an '88 model.
Try the trim pots if your getting Jack (unless both caps in the signal line are dead) I compared the pics, and worked from there.
Maybe some people tweek the trim pots, figures it sounds good/still broken and sell it off as is. |
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Rocker Pedal Mods
