[Elecraft] Twisted Pair RS232 leads, particularly [K2] (was: EARC End Fed 6-40 question)

[David Woolley (E.L)]

I could understand your suggestion wrt to twisted pair on the K2 serial 
cable if it were using RS-423 and therefore balanced receivers with no 
parallelling of the signal returns.  However, how does twisted pair 
really help if the return in the twisted pair is in parallel with that 
for the other signal lines and any functional earth bonding strap 
between the two pieces of equipment?

Of course, PCs don't use RS-423, so one could only implement that for 
data to the K2.

Jim Brown wrote:

> 
> Another issue, if you're using a K2, is that the serial cable that was 
> built from instructions (and the parts provided) used parallel 
> conductors rather than twisted pair.  That was a VERY poor design choice 
> -- parallel conductors are very susceptible to RF and other noise, and 
> twisted pair inherently rejects RFI and noise.  That's why CAT5/6/7 
> cable is twisted pair.


-- 
David Woolley
Registered owner K2 06123