[Boatanchors] update R-1524(P) / WRR ?

[Francesco Ledda]

I have one of those myself, and it is all solid state with no nuvistors.

-----Original Message-----
From: boatanchors-bounces at mailman.qth.net
[mailto:boatanchors-bounces at mailman.qth.net]On Behalf Of J. Forster
Sent: Saturday, June 11, 2005 12:14 AM
To: BSugarberg
Cc: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] update R-1524(P) / WRR ?


The gray stuff looks exactly like a GLR-9 surveillance receiver made by ACL.
It's the mil version of the SR-209.

Typically, it has PC cards for the IF, one card per IF BW. I've seen cards
from 10 or 15 KHz to at least 2 MHz. The
thing is 60s vintage and mostly discrete transistors, except for some
Nuvistors in the front end. Tuning is by a
multi-gang helical spiral thing molded into Bakelite sheets. 'I've seen
tuning heads from a few MHz to 12 GHz. This
and similar stuff was used as ELINT gear on nuke subs in the late 60s.

As to operation, they are nice for a look-see but not stable enough for long
term listening to NB FM. Typical NFs
are 7 to 12 dB. A low noise preamp is a good thing.

ACL also made a panadapter unit that replaces one tuning head, and a DAFC
unit that counts the LO and produces an
analog tuning voltage. I've never been able to make that part work.


The panadapter does look like W-J or CEI. The receivers used either 21.4 or
30 MHz. You need the correct panadapter.

FWIW,
-John



BSugarberg wrote:

> Hello Eugene,
>
> Something by Watkins-Johnson perhaps?
>



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