Tube Amps / Music Electronics
|For current discussions, please visit Music Electronics Forum.||New: view Recent Searches.
New: visit Schematic Hell!
The sunn still shines online!
|Listen to great tunes streaming live right now!|
|9/13/2000 6:30 PM|
|Adrian||How to tell if a P.U. is D.O.A.|
I have a guitar that may have a bad P.U.. I am hoping the crew here can help me determine the FACTS!
- Guitar is a 70's Epi Coronet(?) with two metal covered humbuckers.
- For a while I was using this Guit. as a test instrument for homebrew effects and they all sounded like they had a nasty scrapey distortion on hard hit chords.
- when lowering the front HB it failed - no more output - bridge PU is fine and bridge only switch position is fine.
- the switch checks out for continuity as do all the grounds i can find.
I can find no wiring fault using my level of sophistication in trouble shooting (i have never really worked on guitars, just EFX, and a little amp work)
Before I go and buy a new PU what should I check?
I am a big cheepie and would positively HATE to buy a PU and then find a different problem.
Pointers extremely welcome!
|9/13/2000 6:35 PM|
Disconnect the pickup leads and check for continuity across the pickup itself. Should be between 5 and 15 k ohms. If you get open or short circuit the pickup has a problem.
Pretty much all pickups are repairable - but it can be more trouble than it's worth.
|Book Of The Day||
The Ultimate Tone, Volume III by Kevin O'Connor
Note: The Ampage Archive is an Amazon Associate site. A small commission is paid to the site owner on any qualified purchase made after clicking an associate link such as the one above.
|9/13/2000 7:59 PM|
|Adrian||How to tell if a P.U. is D.O.A. !|
Thanks Liam - I'll do as suggested. If it is open or shorted I may try a repair even though I'm happy to buy a new PU if needed. I like getting into things - if it is broken I have nothing to lose and much to gain in the way of knowledge!
For example I fixed a non-functional key on an olde synth i have - it sure makes for a better keyboard.
|9/13/2000 8:33 PM|
Your Epi is likely a Crestwood model...
|9/13/2000 10:42 PM|
Double Cutaway, Black, Les Paul-type headstock. white/clear pickguard. several pieces of wood comprise the neck, white dot inlays, Les Paul-type bridge.
2vol 2tone knobs plus the selector down near them so you can accidentally hit it.
Is that the Crestwood?
|9/14/2000 5:22 PM|
That sounds like the one (just can not recall the headstock shape). Body thinner that usual. Cutaways
different from a LP jr. & Melody Maker. "C" with line through middle on either pickguard or truss rod cover. Two semi-cheezy humbuckers (no offence meant here, the PU's are just not up there with the standard Gibson 49X's...)
The Crestwood had a few permutaions over the years, from fixed bridges to whammy bar setups. Also, some had chrome hardware, others had gold. Finishes varied from sunburst to solids. Some had set-necks, others were bolt-ons.
The guitar player for Hole used to use one a few years back. I really like the design, very cool!
|9/18/2000 8:50 PM|
Thanks Again for the Info.
I did manage to fix it and learned something good in the process.
this: the "continuity" setting on a DMM may read good even when a connection is not good enough at low signal.
- Duh - Use resistance! or at least in combo.
The "hot line from the PU was dead at the pickup end due to a bad joint to begin with and the pressure of trying to lower the pickup against this block which the neck bolts on to. the cavity is too shallow as a result of the thin body. the front PU can't go even fairly low.
I guess it is a budget guitar for a reason! Still much better that the real cheap guitars of the 70's!
Hondo , anyone?
|Page 1 of 1|