[Premium-Rx] Telefunken E1600 VHF/UHF Receiver

[GandalfG8 at aol.com]

In a message dated 10/04/2006 23:45:34 GMT Daylight Time,  
spencer12345 at msn.com writes:

Lastly,  the wire-wrap connections found on all the 'behind the front panel' 
items  makes me rather nervous. Seems this was relatively common for this 
group  of products.

I am nervous about this since I need to replace a front  panel toggle switch 
and the though of breaking a group of non-color coded,  small gauge, solid 
wire-wrap wires is almost more than my middle aged  fingers can take!



Hi Spencer
 
Unfortunately, I can't help with any specific info on the receiver but have  
a little wire wrapping experience from way back.
 
Although you can break the joints apart with fine pliers if careful,  without 
the proper tools you're not going to get the joints unwrapped and then  
properly remade on the new switch, even if you can find one with wire wrap  pins.
Re-wrapping used wire isn't a good idea either, you should  really run fresh 
wire for a repair.
And with hand tools even with fresh stripped wire the chances of an  
unreliable joint aren't insignificant..
 
Much as I like to keep things as original if possible, if it were my set  I'd 
accept I was going to have to break the joints on the old switch and replace  
it with a soldered one.
The wire should take solder ok so you've got the option of cutting the  wires 
off where the insulation ends and stripping a fresh bit if there's enough  
slack, or carefully unwrapping just enough to leave wire for soldering and then  
cutting off.
I can't see much point in trying to fully strip each joint, as it  should be 
much easier, and less chance of breakage, just to open  up a short length 
starting from the back and then cut it free.
 
The non-color coded wire could be marked with little strips of colored  stick 
paper if you want to get everything prepared before installing and  soldering 
the new switch.
However, what I generally do is deal with one wire at a time  and transfer it 
to the new switch.
You usually have the choice then of having either one fixed to the panel as  
you do it or both floating, often more convenient for access to pins, and  
refitting when wired.
 
Others might have better ideas but that seems like the best  option to me.
 
regards
 
and good luck:-)
 
Nigel
G8PZR
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