[BC] Harris 50 om coax jumpers

[radioranger at comcast.net]

Does anyone know why Harris uses some sort of 50 ohm cable with what looks like shrink tubing over the outer jacket as jumper cables in the HT series transmitters?  If it's just off the shelf RG-213, why the extra jacket?

Steve B.

 -------------- Original message ----------------------
From: dynotherm at earthlink.net
> 
> 
> -----Original Message-----
> >From: RichardBJohnson at comcast.net
> >Subject: Re: [BC] RG-8
> >
> >Bob,
> >RG8/AU is pretty good. The insulation will handle 30 kV!
> >This doesn't mean RF connectors will. Many Hi-pot testers
> >use RG8 cable stripped back about 4 inches so there is
> >about 4 inches of polyethylene before the shield. From
> >a UL ampacity perspective, the inside wire is 11 gauge
> >and will therefore handle 25 amperes, MUCH more than
> >you would like!  That is 31,250 watts!
> 
> Quick! Get me the hip waders and the Bobcat. This is
> getting so deep a shovel can't begin to keep up. <ggg>
> 
> That is the problem with leaving out critical points
> like the loss which = HEAT and the plastic temp of
> polyethylene. Get REAL! The stuff will melt into a
> pile of glop long before you get 3000 W through it,
> let alone 30 (!) kW.
> 
> Phil Alexander, CSRE, AMD
> 
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