[Hammarlund] S meter

[Bob Young]

I've been reading this with interest as I have several SP-200 and 400's and 
all their meters just go from 0-9 and their is no mention in the TM11-866 
manual about S meter units. I do have other manuals specifically about the 
SP-200's and 400's however (this manual I just mentioned is for their 
military receivers of which I have one which is really an SP-200XS,  BC-779 
I think). On the other hand my HQ-180 is (or was) calibrated at 50 uv. for 
S9.

Bob Young
Millbury, Ma


>From: DJED1 at aol.com
>To: hammarlund at mailman.qth.net
>Subject: Re: [Hammarlund] S meter
>Date: Thu, 13 Jul 2006 09:57:47 EDT
>
>I recall that the old Hammarlund SP-200 I used as a kid had the same info  
>on
>S-meter calibration, i.e. a doubling of signal per unit and 50  microvolts
>for S-9.  I think that back in the '30 they only thought of  signal 
>strength in
>microvolts, so a doubling was twice the voltage.  And  probably they didn't
>see too many S-9+++ signals, considering that most rigs  were trnasmitting 
>10 to
>100 watts. I wasn't there, so just my .02
>Ed
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