I find 0.25" semi-rigid (real RG401) gets warm at 400W on 23cm.
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73, Phil. G3TCU
On 03/03/2021 22:55, Andy G4JNT via
To be a
bit more scientific about it :
.086 Simi Rigid is 0.73dB / metre at 1296MHz. SO in a 100mm
length, that's 1 - 10^(-.0073) = 0.0167 of the input power
Watts that's 1.7 Watts dissipated in 100mm of cable. You'd
expect it to be getting warm
On Wed, 3 Mar 2021 at 22:45,
ian hope (2E0IJH) <ian@...
I remember melting a Rg213 patch lead with a K2RIW,
BTW if anyone's got a neglected one laying about PM me
expect .086 SR to get warm at 100W of L-Band
in the days of playing with a K2RIW, I
remember the thicker .141 SR gets warm at 400W
the same stuff warms with 10W of 10GHz
should be using .141 at that level / frequency
Ok, my new 23cm
100W set seems to be working but noticed the
cable from amp to isolator is getting warm,
its blue mini bend, and the cable from ant
relay to socket on case wall, semi-rigid
(0.086) is also warm.
I'm going N to sma adapter, sma
mini-bend to sma iso, iso is sma o/p to
sma to N adp into relay, N to sma adp then
semi rigid to N chassis socket.
What else can I use? RG402? I could
use N type soldered to RG402 to sma for
Amp to Iso and Soldered N RG402 to N and
use a N to N bulkhead I guess. That would
remove a couple of adaptors.