[MRCA] Mystery Signals

[Al Klase]

That is correct!  You beat me to it. - Al

On 6/6/2019 11:15 AM, J Mcvey via MRCA wrote:
> The BC659 uses a quadrupler circuit in the oscillator and a 4.3 Mhz IF .
> A crystal marked 271 indicates that it will operate on 27,1 Mhz
>
> Start with fully meshed caps and use the tuning procedures in the 
> manual. It's real easy to get false harmonics on those.
>
> I think the antenna was supposed to be 300 ohms  . It's approximately 
> half wave .
>
> On Thursday, June 6, 2019, 11:05:51 AM EDT, comcast 
> <kg2bz at comcast.net> wrote:
>
>
> breck.  im thinking its the 11 meter cb frequencies. jeff
>
> Sent from my iPhone
>
> On Jun 6, 2019, at 10:59 AM, Jeep Platt <jeepcomms at outlook.com 
> <mailto:jeepcomms at outlook.com>> wrote:
>
> Gents, Aren't we talking about low-band FM?   Refresh my memory, what 
> harmonic and IF is involved here?
> K3HVG
>
> Get Outlook for Android <https://aka.ms/ghei36>
>
> ------------------------------------------------------------------------
> *From:* mrca-bounces at mailman.qth.net 
> <mailto:mrca-bounces at mailman.qth.net> <mrca-bounces at mailman.qth.net 
> <mailto:mrca-bounces at mailman.qth.net>> on behalf of B. Smith 
> <smithab11 at comcast.net <mailto:smithab11 at comcast.net>>
> *Sent:* Thursday, June 6, 2019 10:49:52 AM
> *To:* Military Radio Collectors Association
> *Subject:* [MRCA] Mystery Signals
> I've been working on a BC-659 WWII FM set and have the receiver on 
> "life support" power. I picked a couple of crystals out of the front 
> row of the CS-137 crystal case and one was marked FREQ-KC 5700 
> CHANNEL  271 with  271  marked on the top and plugged it into the "A" 
> position on the set and then "A" was selected on the set.   Then  I 
> thought I could hear strange signals that were very weak and it seemed 
> odd  as a antenna was not connected  to the set. I then attached my 
> trusty Operations Center long wire  and signals starting coming in and 
> I then proceeded to peak the receiver stage trimmers. However the 
> stations  could not be identified and it appears they were just a mass 
> of stations all transmitting at the same time. No voice or CW 
> identifiers could be made out and the remarks made by the station 
> operators did not make any sense-it sounded like the English language 
> but hard to identify the remarks by the operators.  Mystery  FM 
> signals on 5700 Kc?
>
> Here is a link to the audio and a photo of the 5700 CHANNEL crystal is 
> attached.
> Z
> http://k4che.com/Tempvideo/BC-659%20Mystery%20Signals/BC-659%20Mystery%20Signals.mp4
>
>
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-- 
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/

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