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From: hermann@cs-sun-fsa.cpsc.ucalgary.ca (Michael Hermann)
Newsgroups: sci.electronics
Subject: help: replacing cassette head wiring
Message-ID: <1990Dec5.215416.14331@cpsc.ucalgary.ca>
Date: 5 Dec 90 21:54:16 GMT
Organization: U. of Calgary, Alberta, Canada
Lines: 34
Originator: hermann@cs-sun-fsc
Nntp-Posting-Host: cs-sun-fsc

Hello all,

	A friends' tape deck has problems, caused by faulty pickup leads
(over time these have suffered metal fatigue). The leads are in the form of a
sheathed and shielded 4 conductor cable. The cost of an original part (if I
can find one) is probably excessive, and I'd like to use some other cheaper
shielded cable.

Questions:
	1) do I have to worry about impedance matching? A friend says that
the head and head-amplifier will be terminated to match each other, and the
cable characteristics are negligible. Is this true?
	2) how close do I have to match the cable for shielding, wire gauge,
and wire alloy? I don't have the knowledge to tell if these are high silver
content, or something else.
	3) when soldering, should I try to use a silver solder? What
temperature? How susceptible to heat stress are tape heads?

	If you can help, please e-mail. If there's any interest, I'll
summarize. Thanks

Mike Hermann
hermann@cpsc.ucalgary.ca

Department of Computer Science |  
University of Calgary          |  Work: (403) 220-7691
2500 - University Dr. NW       |  Fax:  (403) 284-4707
Calgary, Alta., CANADA         |  Local Time: (GMT - 7) hours
T2N-1N4                        |

-- 
|  Mike Hermann  | hermann@cpsc.ucalgary.ca
_Organized_ religion is like organized crime: it preys on peoples' weaknesses,
generates huge profits, and is nearly impossible to eradicate.