Re: [RTrak] Re: RTrak-HAB antenna thoughts
- On Thu, Aug 2, 2012 at 2:16 PM, airsix73 <ben.messinger@...> wrote:
> Jason, what teflon coax are you using?Some we recovered from wiring harnesses (from a blackhawk maybe?) that
were donated to the university. I think it's RG142, which is sort of a
double braid teflon version of RG58.
When we use the tape measure antenna, no coax is outside so I use
standard (PVC) RG174 with an SMA connector, which is easier to route
inside the box and connects directly to the SMA connector on the Alino
DJ-C7, which is our standard tracker radio.
On the RTrak-HABs which will be our backup tracker if the frequency
switching bug ever gets fixed, we'll probably just use a Comet SMA-24.
- Ben KF7VZR (got that from a June 22 message) wrote...
> My documentation says nothing about TX audio level...Deviation is important. If it's too high (within limits) nearby stations
> They've both been played with...
may still be able to decode the tones. Distant ones where your signal
is weaker may not be able to. You have probably heard this on a voice
repeater or even on simplex. A distant and noisy station can be copied
via a repeater if he backs off from the mic. If he starts shouting, the
deviation goes up. More energy is outside the passband of the receiver
and eventually the signal is too noisy to copy or the squelch might
even close. If you are simplex, you can try opening your squelch. If
you are on a repeater, you're out of luck. It's the same with packet.
You are better off having the deviation set properly. It can be done
by ear, but a deviation meter or service monitor would be better.
Lacking one, just crank the deviation all of the way up and then
start turning it down. When it starts to sound quieter, turn it down
some more. It will get you in the ballpark, but checking the actual
deviation would be better.
Perhaps you could check the actual deviation before you change
anything. So... could over-deviation explain why only one iGate
73 es cul - Keith VE7GDH
"I may be lost, but I know exactly where I am!"