[Milsurplus] HRO RAS receiver

Wed, 3 Dec 2003 20:05:09 -0500

I have a RAS-5 serial #820 National Radio NXss 20976 Jan 7,1943
The original owner/sailor was stationed at the Norfolk Naval Base, VA after
the war and somehow got it though the base amateur radio club.
I received it with only a data plate on the receiver and on each coil with
the matching #820 serial number.
At a hamfest, I happened to find the same contract data plates for the coil
compartment but with serial# 1901
The coil compartment data plate contains the frequency range of each coil
and personally would leave it on if I had the choice. I suspect it was a
cost cutting move and not hams that removed them.

I stopped using my RAS-5 a few years back because of a sizzling sound coming
from the power supply cabinet. Although working perfectly, I turned the set
off ASAP. Sure would be nice to find a tech manual. I suppose if I ran
through the filter, decoupling and bypass caps, I would stand a good chance
in stopping the sizzling hi.
Was this receiver designed by or during James Millen's reign at National?
What transmitters were used with the RAS?
bob...w2ami
http://www.qrz.com/callsign/w2ami

----- Original Message ----- 
From: "Ray Fantini" <[email protected]>
To: <[email protected]>
Sent: Wednesday, December 03, 2003 9:26 AM
Subject: [Milsurplus] HRO RAS receiver

Did a quick check on the RAS data plates last night, the oldest is the RAS-1
with a contract # NOS-70176 date 7 Dec 39, the RAS-4 stuff is contract #
NX-455 30 April 42 and the RAS-5 stuff is contract # NXRS-20976 dated 7 Jan
43
Do not think their is any difference between any of the RAS series radios,
or at least any I have seen. did try the noise limiter kit and it dropped
right into the location of the 6F8 tube and worked fine, although the
receiver appears to be a little more prone to overload on strong signals.
will post a copy of this on the millist to see if anyone their can shed any
light on weather their is any different between HRO RAS series.
Second question, about half the RAS series radios I have seen are missing
their data plates. I always thought this was because the Hams who bought
them originally after the war thought they would look better without the
plates so they striped them off, but then when looking at the Albro Lake web
page  http://webhome.idirect.com/~jproc/rrp/albro_lake.html
 I see that all the RAS receivers have no data plates, where all the ones
produced for overseas shipment not provided with plates? and ones making
their way back from Canada never had plates to begin with?
Ray Fantini KA3EKH

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