Tr> I just recently installed an Alpine CD player in place of my
Tr> factory unit. I have two problems. First, the rear
Tr> amp/crossover emits a loud pop when I power on my unit. Second,
Tr> the AM side of my antenna does not seem to work. All I get is
Tr> static. FM reception is fine. None of this was a problem with
Tr> the OEM unit. I believe I have all the contacts correct. Please
Tr> P.S. Anyone want to buy an OEM radio from 1990 CQ
Tr> Tim 90CQ, 77Spitfire
This was posted a while ago to the list, here is a reprint,
I don't even know if the original author is still on the list
Maybe this has been covered before, but...
I just replaced the Audi/Bose Blaupunkt Delta unit in my V8 Quattro when
the on/off switch finally crapped out. Even though Audi will do an
exchange for $85, I decided to go for something better.
When I wired the line outputs of the new head unit to the inputs of the
Bose powered speaker units, I got a huge electronic "thud" each time
the pre-amp engaged, and a lot of alternator whine. Upon further
investigation, I found that the inputs of the speaker units were at a
potential of five volts (for some strange reason). The problem was
solved by adding an isolation transformer between the line-outs of the
head unit, and the speaker line-inputs. The isolation transformers are
readily available at any Radio Shack and are called ground loop isolators.
Any idea why Bose/Blaupunkt did this?
Applied Research Laboratory
Penn State University
State College, PA
... I only wrote the thing, I don't have to understand it!
___ Blue Wave/QWK v2.12