[Milsurplus] RBO-2 cover, another possibility

[Nick England]

Color me skeptical. Antenna radiation is one thing but RF leakage from a
receiver dial doesn’t seem like much of a threat inside a steel compartment
full of teletypes switching 120vdc 60ma signals.

Or maybe it was the other way around and they were trying to keep TTY spark
noise out of the receiver?? Insert tongue-in-cheek emoji here.

Nick

On Thu, Jun 10, 2021 at 2:57 PM CL in NC via Milsurplus <
milsurplus at mailman.qth.net> wrote:

> In  the RBO-1 book, it says:
>
> 2.17 The  Type  CZC-46224 Radio  Receiver is especially designed to
> minimize ra­diation from  the  high  frequency oscillator. This is
> accomplished by isolating the antenna input  circuits from  the  first
> detector (or mixer) and the high frequency oscillator cir­cuits,  through
> the use  of extensive shielding and  filtering, and  by  the  employment
> of  a type of  construction which reduces, to prac­tical  limits,
> undesirable circuit coupling by virtue of  circulating currents in  common
> shields.
>
> Perhaps this cover over the dial is more RF radiation protection.
>
> Charlie, W4MEC in NC
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-- 
Nick England K4NYW
www.navy-radio.com
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