[Milsurplus] Alexanderson alternator on Xmas eve

[Mike Feher]

I have Rycoms 3135 and 6040. They both have AM and USB and LSB capability
with either 3.1KHz or 100Hz BW. No variable BFO however. The 6040 was last
calibrated by Rycom in 1989, so, it is not that old, and has LCD displays
for signal level and frequency. Tunes from 300 Hz to 3500 KHz. Both can be
either AC or internal DC operated. Very nice, sensitive, and of course
selective, baseband receivers. They have a nice Costas loop, so, an external
counter can be connected to a BNC, if desired, and the frequency read out
with extreme accuracy. It is always interesting to see how much some of the
local BC band transmitters jump in frequency. -   

 
 
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
 
 

-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of James M. Walker
Sent: Monday, December 10, 2007 10:56 AM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Alexanderson alternator on Xmas eve

I am currently using a Rycom 1307A/GR as the "Buffalo Grabber" receiver
for the ARRL 500 KC experiment. Evenings starting at 15:00 EDT.

It will be on to copy SAQ, I think I'll hear it as I also hear the BIG 
Chinese
station, at 68 Khz.

Jim
WB2FCN/WD2XSH-22

----- Original Message ----- 
From: "Mike Morrow" <kk5f at earthlink.net>
To: <milsurplus at mailman.qth.net>
Sent: Sunday, December 09, 2007 7:26 PM
Subject: RE: [Milsurplus] Alexanderson alternator on Xmas eve


> Mike wrote:
>
>>For the receiver, I believe I am just going to use one of
>>my relatively modern solid state Rycom selective voltmeters.
>
> There's another name from the past.  Submarines of my era often had a 
> commercial model Rycom selective voltmeter installed...not in the radio 
> room, but in sonar as a acoustic receiver.   I'll bet it will make a 
> pretty good VLF receiver.
>
> FWIW, our underwater telephone system, used for voice communications via 
> sound to surface ship escort, actually used an upper sideband modulated 
> acoustic signal whose "carrier" would be in the VLF range, had it been 
> radio and not sound.
>
> Mike / KK5F



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