[Milsurplus] LO radiation

[Hue Miller]

----- Original Message ----- 
From: "Bob Camp" <ham at cq.nu>

> Hi
> 
> Ok, here's a stab at it. I'm assuming a single diode mixer. A common 
> setup in early IFF receivers. Simply to keep things straight the local 
> oscillator radiating radio is called the transmitter.
> 
> TX LO power +3 dbm
> TX isolation LO to antenna -3 db
> TX antenna gain +0 dbi
> 
> ERP from the TX 0 dbm

TX isolation to antenna -3 db
*This is RATHER optimistice, isn't it ?

TX ant gain 0 dbi
*Are you assuming a matched-antenna case? How was the receiver "matched"
to the antenna, and at what frequencies? If not, how does a severe mismatch
affect this figure, affect power radiated. I suggest that this figure is VERY
optimistic. And as we know from using long-wire antennas, the antenna is not
strictly reciprocal as long as it is longer than some (hi-reactance) short length.

The Navy list of "safe, approved" receivers had a list versus the actual antenna
( note, antenna post or connection! ) power, didn't it? I can't find mine right now...
-Hue Miller