[Boatanchors] What is a WRR-10

[J. Forster]

Unless the WLR-1 was fitted with Low Noise TWTA preamps, it's NF was
probably about the same as the APR-4.

-John

================


> John wrote:
>
>> More sensitivity is good, but the
>> older SIGINT sets with a tunable filter
>> and mixer, no RF amp, have a Noise Figure of about 8 to 10
>> dB at X-band.
>> Not all that bad really.
>>
>> And remember, a RADAR detection receiver benefits a great
>> deal from the
>> RADAR equation....  you can see a RADAR waaaaaay
>> sooner than it can see
>> you.
>
> Ahhh, yes. Like an old tube type UHF TV tuner, with no RF amplifier, a
> 1N82 mixer diode, and a 6AF4 oscillator.  Yes, the mixer could be worse in
> terms of noise.  Shades of the old AN/APR-4 SIGINT receiver.  I donated
> one of these with a couple of tuning units to a local air museum a while
> back.
>
> Drew
>
>
>
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