[R-390] BFO Dial

[Roger Ruszkowski]

Glenn,
 
Funny you should ask,
I will explain these funny dials to you and then you will
have to self destruct in 60 seconds.
 
The micro dials as they were called were Military stock  additions.
The BFO micro dials were used for RTTY work.
The dial made it easier to set the BFO pitch to center the audio
into the RTTY demodulator and thus copy RTTY.
 
The signal corps used them in their RTTY installations.

So much miss information OH look the receiver has a micro dial it must have
been a spook receiver. No it was a signal corps HF link receiver.
The spooks did use them but not exclusively.

What are you going to use 10 to 20 for?

Try Fair Radio in Ohio to round out your needs.

There are other dial counters available if you can not find the micro dials as used items.

Roger AI4NI
 
 
 
 
-----Original Message-----
From: Glenn Scott via R-390 <r-390 at mailman.qth.net>
To: r-390 <r-390 at mailman.qth.net>
Sent: Mon, Aug 4, 2014 3:17 pm
Subject: [R-390] BFO Dial


Hi Group,


I am looking for a source for the vernier dials that are occasionally seen on 
R390A's, Looking for a quantity of 10 to 20 or more but will buy whatever you 
have if it's in decent shape. A few scratches is no problem just as long as they 
work well and can be made to look decent without surgery.
Does anyone know if there was a particular contract that called for these dials 
or were they added on by Hams later? Any history about these would be 
interesting.


73,


Glenn WA4AOS
DSM Labs (dot com)
864 684 2956
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