[R-390] SSB R-390A?
Cecil Acuff
chacuff at cableone.net
Wed Mar 29 08:38:46 EST 2006
Looks like 32.8 or 32.0 if the zero is slashed....Hard to read. The other
does look like 24.5 mc.
I'll have to dig out a book and look at the math...
Cecil....
----- Original Message -----
From: "Tim Shoppa" <tshoppa at wmata.com>
To: <r-390 at mailman.qth.net>
Sent: Wednesday, March 29, 2006 6:50 AM
Subject: Re: [R-390] SSB R-390A?
>> It this a factory job? Ebay number 9705221146.
>
> I don't know what an official factory job looks like, but it looks
> pretty well done.
>
> The frequencies printed on the crystals seem to be 22.8 and 24.5 MC?
> They look
> like WW2-surplus tank radio crystals, and I try to work out
> how 455kc gozinta those and end up with multipliers like 54. Does
> that ring a bell? 54 = 3*3*3*2, and 24.5/54 = 453.7kc.
>
> I know that 50's/60's era ARRL handbook BFO crystal articles had a table
> or
> formula relating tank radio crystal channels to IF-like frequencies.
>
>> This guys feedback reminds me of radio mart.
>
> Hard to tell. Other guys have drawn a similar conclusion from other
> auctions
> by this guy (esp the red velvet in some other pics), but I don't see all
> of
> radio mart's stupid boilerplate. Superlatives in the description are
> similar though.
>
> Tim.
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