[Milsurplus] Odd choice of xtal frequency?

[Ian Wilson]

Hi Ken,

According to TM-11-853, the CW3 contains a BFO and output limiter; the F3
contains no BFO but has AVC and noise suppression.

CW3: It consists of a radiofrequency (r-f) amplifier stage, a mixer and
high-frequency (h-f) oscillator stage, an intermediate-frequency (i-f)
amplifier stage, a detector
and beat-frequency oscillator (bfo) control tube, and an audio-output and
output limiter stage.

F3 (fig. 4) is similar in
appearance and functioning to radio receiver type CW3 with the exception
that this receiver
circuit consists of an r-f amplifier stage, a mixer and h-f oscillator
stage, an i-f amplifier
stage, detector and automatic-volume-control (a-v-c) stage, and an output
and noise suppressor stage.


73, ian K3IMW

On Thu, Oct 26, 2017 at 12:31 PM, Kenneth G. Gordon <
kgordon2006 at frontier.com> wrote:

> On 26 Oct 2017 at 9:58, Ian Wilson wrote:
>
> > I have a Wilcox CW3 single-frequency aircraft monitoring receiver.
>
> And I have one CWF-3, which has a BFO.
>
> I'd like to get it in operation. It has not been modified in any way. I do
> have a manual for it.
>
> Ken W7EKB
>
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