> RG-142 cable will work very well at VHF, since
> the loss is much less than at UHF.
With typical UHF 440Mhz cable lenghts of less than
10 inches, more loss is probably in the connectors
and their resultant (but small) impedance bump.
> However, you might consider using RG-400 instead
> of RG-142, since RG-400 has a stranded (instead
> of a solid) center conductor.
Wire general rule of thumb. Solid conductors at
fixed locations. Stranded and braided conductors
at locations that move (flex).
> Otherwise, the two cables are identical.
Very nice indeed
> For more
> information on the RG-142 versus RG-400 issue, visit:
> <www.repeater-builder.com/rbtip/double-shielded-coax.html>
> 73, Eric Lemmon WB6FLY
There are similar spec types of coax within the PTFE
(teflon) coax family which can also be found at flea
markets, pretty darn cheap.
The white PTFE type RG-58 size coax found in old Motorola
800 Mhz mobile antenna kits is nice, but very lossy. I
would not use it for a critical length cables. An urban
rummor about the white mobile ptfe type coax... it was
stated by the sales people that Motorola used it because
Install Technicians couldn't melt the center insulator.
... although I saw a few folks try really hard.
cheers
skipp
www.radiowrench.com
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