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PostPosted: Wed Nov 23, 2011 8:36 pm 
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When the knob is about halfway I'm getting noise in both modes at the volume pot and the resistor. When its maxed I'm getting nothing


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PostPosted: Wed Nov 23, 2011 8:46 pm 
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Sounds like the pot is wired backwards. You can rewire that now or we can just make a mental note and move on. with the pot turned down which is actually up :lol: do you now have sound when touching pin 2?


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PostPosted: Wed Nov 23, 2011 8:51 pm 
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well i'm not getting sound when the knob on 1 either... really only when its exactly in the middle...

no sound on pin 2 regardless of the position

edit, just made made contact at lug two while turning the volume knob and theres no sound at 1 then it gets louder as it should and fades complete around 9.


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PostPosted: Wed Nov 23, 2011 8:57 pm 
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on that switch (tweed -tide) there are 2 resistors 220K and 22K. Do you have them swapped around? ..hmmm maybe not...


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PostPosted: Wed Nov 23, 2011 9:02 pm 
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nope, double checked and they're both the correct values.


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PostPosted: Wed Nov 23, 2011 9:10 pm 
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There's no dc present on any lugs on that pot right?
edit. I think we'll leave this section be for the time being. I think that since were just injecting noise at various spots, then thing maybe ok. here.
I think we should concentrate on why there's no pop at pin 2. But I gotta leave ya to it for tonight. Gotta go out.
Stew


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PostPosted: Wed Nov 23, 2011 9:17 pm 
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i measured 1.7DC on the lug that the 22K resistor attaches to and the lug right above that one.

ok, thanks for all your help. :)


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PostPosted: Wed Nov 23, 2011 9:56 pm 
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Just got a few minutes ... I was looking at your photobucket shots #xxxxxxx804. I don't see a wire coming from the botton of the .01uf 400V coupling cap.(C2) thats the small white cap next to the larger white cap.. This is the feed from v1a to v1b..critical!


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PostPosted: Wed Nov 23, 2011 10:16 pm 
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you mean the wire that goes to lug 3 of the volume pot? I fixed that earlier


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PostPosted: Thu Nov 24, 2011 1:01 pm 
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Do you hear anything when you poke around that wire you added from the cap or lug 3?


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PostPosted: Thu Nov 24, 2011 3:50 pm 
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I spent some more time studying your photos.. It looks to me that on the V1 socket you have the two plate wires reversed. ie. the wire from pin 1 should go to the turret that has the 220K on the right ( it's on the diagonal) but you have it going to the 220k on the left!
Pin 6 Should go to the resistor on the left you have it on the right.
Stew


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PostPosted: Thu Nov 24, 2011 9:00 pm 
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I looked at my layout and it shows pin 1 going to left and 6 to the right... is it incorrect or am I looking at it wrong?

edit, just to clarify, you're saying the blue and white wires in this picture need to be reversed?

http://i663.photobucket.com/albums/uu35 ... 173148.jpg


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PostPosted: Thu Nov 24, 2011 9:06 pm 
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Yes correct

Swap them

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http://pdfelectronics.com


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PostPosted: Thu Nov 24, 2011 9:16 pm 
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am I crazy or is my layout incorrect then?

Image


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PostPosted: Thu Nov 24, 2011 9:41 pm 
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I just made the swap. There's sound, its weak, but its something :) But I'm not done yet. the volume control doesn't seem to have any effect, even when pulled.. the bass knob doesn't do anything but when pulled i believe fat mode is engaged. Treble doesn't work. the master volume and VRM seem to be working normally.


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PostPosted: Thu Nov 24, 2011 11:31 pm 
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OK first things first.. When you say you have sound, do you actually have a guitar plugged into the input? I think you should, or at least have a guitar cable plugged in and you can just touch the tip with you finger to substitute.
Then I'm thinking we'll get the volume(gain) working next and then move to the tone controls.
You up for that!? :D This may take a while. so any time you wanna check and recheck what you've done....feel free! 8)
Stew


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PostPosted: Thu Nov 24, 2011 11:34 pm 
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The sound is with a guitar plugged in. Sounds like a great way to get things working. Thanks again for helping me through this :)


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PostPosted: Thu Nov 24, 2011 11:56 pm 
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You're welcome. I don't have an amp on the go myself so I'm gettin my jolies this way :lol:
Anyway you can get a nice ,in focus close up of the volume control?
While you're at it check your wiring against the color layout. See that line from the output switch connects to a resistor (22k) before it connects to the switch.


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PostPosted: Fri Nov 25, 2011 9:21 am 
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Image

You mean the impedance switch correct? Its connected to the 22k resistor on the volume control though the 8 ohm tap (the blue wire in my pic).


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PostPosted: Fri Nov 25, 2011 11:46 am 
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:shock: Are those dual ganged pots???! If so you need to make sure you only use one of the gangs. Ie: there are 2 sets of lugs ( right?) 1a 2a &3a and 1b2b&3b. You can use the a or the b but you cannot mix them . So... Do those 2 switch pots look like the round portion is about twice as thick a the other pots? I'm on my iPhone now so pix are small .
Stew


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