[Milsurplus] LO radiation

[Radioman390 at cs.com]

"J. Forster" <jfor at quik.com> wrote:

>Hue Miller wrote:
>
>> Yes, but.....Scott Co. boasted of their "safe" receivers in numerous magazine
>> ads. I think they really believed it. I do NOT think this was some kind of
>> "disinformation campaign"
>
What, may I ask is all the brouhaha about "Tempest compliant" receivers?
There's actually a spec for the degree of attenuation of internal signals at the antenna input.
And this is still current!
Also, look at the shielding in some Racal receivers like the 6775/6778 series. Each circuit board is mounted in a mu-metal case.

Strangely the 6790 has a single bih "mother board", and the earlier 6772 just had circuit boards mounted in slots. But there was a 6772E which had the same shielding as the 6775/6778.

What was all that about?