[Milsurplus] Low Frequency receiver, RBL

[Brian Carling]

Fascinating. I want to monitor those stations below 20 HZ.

Best regards - Bry Carling



> On Sep 2, 2014, at 11:14 AM, Glen Zook via Milsurplus <milsurplus at mailman.qth.net> wrote:
> 
> The Rycom 6010 Selective Voltmeter is an excellent VLF and LF receiver that covers from below 20 Hz to above 200 kHz.  It has both AM and SSB as well as a digital readout.  
> 
> There are Internet sites that list VLF stations:
> 
> http://www.vlf.it/itulist/itulist.htm
> 
> 
> http://www.smeter.net/stations/vlf-stations.php
> 
> 
> Years ago, the National Bureau of Standards operated WWVL on 20.0 kHz.  However, that station has been inactive for decades having been replaced with WWVB on 60.0 kHz.
> 
> Glen, K9STH 
> 
> Website:  http://k9sth.net
> 
> 
> On Monday, September 1, 2014 7:35 PM, David I. Emery <die at dieconsulting.com> wrote:
> 
> 
> 
>> On Mon, Sep 01, 2014 at 12:27:36PM -0400, Nick England wrote:
>> I think most all USN gear went no lower than 14kc (AN/SRR-11, AN/FRR-21,
>> AN/BRR-3, AN/WRR-3, R-389/URR)
>> To go lower (1kc or less) the Rycom R-1655/URR rcvr (basically a Rycom
>> frequency selective voltmeter) and HP 302 and 310 wave analyzers do a
>> pretty good job too.
>> The HP units seem to go really cheap at hamfests ($20-50)
> 
>    Of course if one wants to get a bit more modern (1970s) the
> HP-3586B/C Selective voltmeters are very popular... and go pretty much
> to 100 Hz (and 32 MHz top end) with synthesized tuning in 0.1 Hz
> steps and a tracking generator output signal. Many have high grade
> HP 10 Mhz OCXOs installed with really good stability and accuracy too
> 
>    Might be a bit more expensive at hamfests, but are quite
> common.  Documentation widely available as .pdfs as are parts units.
> 
> 
>