[MRCA] [Milsurplus] R-390A Ops Below 500 kcs

[Mike Feher]

Great craftsmanship and photographical presentation. Congrats. 73 - Mike 

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

-----Original Message-----
From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of B.
Smith
Sent: Monday, January 04, 2016 7:53 PM
To: Milsurplus; mrca at mailman.qth.net
Subject: [Milsurplus] R-390A Ops Below 500 kcs

Happy New Year from Chickenland
          I've been playing with using the R-390A below 500 kcs which was
suggested years ago by Dr. Dallas Lankford in the "Hollow State Newsletter".
As most of the R-390A owners have discoveredthe RF sensitivity drops off
very rapidly as you tune below 500 Kcs and the receiver is virtually useless
as you reach 30-40 kcs below 500 kcsdepending on alignment.
        Anyway no major modifications have to be made and the receiver can
easily pick up signals all the waydown tothe 20-30 kcs thus adding a new
band to your receiver.Sensitivity is excellent. You do not have to change
the RF alignment. An external RF input tuning coil must be constructed as
the RF section is completely by passed. But don't panic you can usePVC and
ABS as a coil form and the winding is not difficult and makes you feel like
you are doing some real radioing. Details on my web pages.


http://k4che.com/R390LF/R390LFVar.htm


k4che

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