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Gizzorge
Silver Member
USA
245 Posts |
 Posted - 04/04/2008 : 22:21:32
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 04/04/2008 : 22:38:28
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quote:
Originally posted by Gizzorge
what type of guitar are you using with it?
Jap strat (Aerodyne). Guess I should also try my USA PRS too, eh? maybe it's that simple.
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 04/05/2008 : 01:59:26
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So I tried it again... and it wasn't any better.
I hadn't taken the back off it to have a look because it had never (ever) been opened.
Just taking the back off now and lo and behold, it's been reverse voltaged sometime in it's life. Reverse diode is FRIED, board around it is baked. Who knows what else is stuffed.
Off we go with the fault finding  Maybe I've got a decent (but sick) pedal afterall... 
Thanks for all your feedback... sorry it's turned out to be this mundane!
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 04/05/2008 : 03:41:59
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Hi lauries2
Any chance you might pot some pics of the damaged area.
Or of the PW-2 internals, in the Tech area,
We don't have any internal pics of the PW-2 yet.
Can you take a pic of the FET variable Differential stage as well?
Regards Dr. Bob |
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marqueemoon
Bronze Member
USA
121 Posts |
Posted - 04/05/2008 : 05:55:58
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I always liked it as a drive (it's different than a lot of dirt pedals) and I liked to use it as a bass boost as well. I think it sounds its absolute best with lower gain...very open and that's where it sounds the most Marshall-like. I posted (and caught some flack) quite a while ago when I posted that I was able to cop near-identical tones out of it with my setup as an Electro-Harmonix English Muff'n. Mileage does vary obviously, but it's a pretty unique sounding box with good range, however I have moved onto other pedals (and amps) since.
quote:
Originally posted by Mr Arkadin
"PW-2 .... what to do with it?"
i'll take it off your hands - i'll even pay postage. 
I've had one on the buying/selling forum for quite a while...if you had an RV-5 that you were looking to get rid of we'd really be cooking  |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 04/05/2008 : 08:14:37
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Hi marqueemoon
Do yo also own an EHX English Muff'n'?
I managed to pick one up for an embarrassingly low price.
Minus the 12VAC power supply, which I now have.
I have some of the 2 pin DIN connectors that are used on the adapter & socket.
There seems to be some mixed feelings about this pedal as well.
I still haven't formed a final opinion of it either.
Regards Dr. Bob
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 04/05/2008 : 15:39:02
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This is the burned area.
Sorry Dr. Bob - the schematic doesn't have component numbers, so until I trace the circuit board, I can't tell you where the differential pair is. (If I had to guess, I'd say it's Q16/Q17 - see the board pics on the sticky thread)
It's hard to tell from the pics, but the 1N400X has ruptured and the solder has run from the board. It's definitely open circuit, so reverse voltage has been applied through the entire circuit.
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Edited by - Laurie on 04/05/2008 15:53:40 |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 04/05/2008 : 16:33:49
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Hi lauries2
I would also definitely check series pass transistor Q11, next to the 4K7 resistor.
As well as any electrolytic caps in th power supply regulator section.
And I'm guessing the 5218 op-amp is damages as well.
Can you post the link, where you found the PW-2 schematic, into the Schematic links section, if it's not already there.
Did you ask the guy you loaned it to, how much EXTRA Rev. voltage he applied to it, or was it AC?
I have a behringer FX100 that had 12VAC applied to it,
but it's more of an academic fix, as a lot of smoke got out of it...
Keep us up to date with your progress.
Regards Dr. Bob
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Edited by - Dr. Bob on 04/05/2008 16:34:35 |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 04/05/2008 : 16:37:56
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quote:
Originally posted by Dr. Bob
Hi lauries2
I would also definitely check series pass transistor Q11, next to the 4K7 resistor.
As well as any electrolytic caps in th power supply regulator section.
And I'm guessing the 5218 op-amp is damages as well.
Can you post the link, where you found the PW-2 schematic, into the Schematic links section, if it's not already there.
Did you ask the guy you loaned it to, how much EXTRA Rev. voltage he applied to it, or was it AC?
I have a behringer FX100 that had 12VAC applied to it,
but it's more of an academic fix, as a lot of smoke got out of it...
Keep us up to date with your progress.
Regards Dr. Bob
The schematic is on FreeInfoSociety - link is already posted. Will keep you updated. |
Edited by - Laurie on 04/05/2008 16:38:13 |
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marqueemoon
Bronze Member
USA
121 Posts |
Posted - 04/05/2008 : 17:55:27
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quote:
Originally posted by Dr. Bob
Hi marqueemoon
Do yo also own an EHX English Muff'n'?
I managed to pick one up for an embarrassingly low price.
Minus the 12VAC power supply, which I now have.
I have some of the 2 pin DIN connectors that are used on the adapter & socket.
There seems to be some mixed feelings about this pedal as well.
I still haven't formed a final opinion of it either.
Regards Dr. Bob
Hey Dr. Bob, I did own one, but I ended up returning it after a couple weeks of mixed results. I got a pretty good deal on it...$100 out the door, but it was still the most expensive od/distortion pedal I've bought to this day. The thing was, I tried it through about a half dozen amps at the shop and it sounded phenomenal, but when I got it home it just didn't click with my amps (Music Man combo + Bassman head). It still sounded good, but it didn't sound anywhere near how it did with other amps, so I ultimately returned it. |
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zentropa
Gold Member
USA
837 Posts |
Posted - 04/05/2008 : 18:23:35
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marquee:
i will mess around w/ my PW-2 on low drive settings when i get the chance. hopefully i'll find something closer to what i want.
quick question on the EHX... did you demo it on tube rectifier amps?
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marqueemoon
Bronze Member
USA
121 Posts |
Posted - 04/05/2008 : 18:33:18
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quote:
Originally posted by zentropa
marquee:
i will mess around w/ my PW-2 on low drive settings when i get the chance. hopefully i'll find something closer to what i want.
quick question on the EHX... did you demo it on tube rectifier amps?
Never tried the Muff'n on recto amps...I used it through a variety of Fender amps (mostly single-channel) at the shop and played it through my Music Man combo and Fender Bassman 50 amp after I bought it. The amps were similar in nature to what I own, but for whatever reason the pedal didn't click with my amps so well. Good luck with your PW-2! Report back. |
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zentropa
Gold Member
USA
837 Posts |
Posted - 04/05/2008 : 18:54:15
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odd. if they were new fender reissue amps might just not like the old vs. new speakers. i find the reissue speakers to be sooooooo bright.
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 04/05/2008 : 21:50:29
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OK... burned out diode is fixed, and I've traced the signal all the way through and everything is working fine. I swapped the opamp just to make sure it was OK (no change with the known-good new one in). Going to replace a pot with a bent shaft on Monday and call it fixed.
I'd have to say it's working "as designed". Still cant say I like it. It does sound better CRANKED, but that's only in comparison to it when the amp is low volume. Just one of those "personal taste" things I guess! Back it goes into the pile of non-favorite stuff... (and wait for it to become worth $1,000,000)
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Edited by - Laurie on 04/06/2008 05:49:07 |
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Laurie
Double Platinum Member
Canada
4854 Posts |
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Topic |
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PW-2 .... what to do with it?
