On Mon, Jul 11, 2011 at 2:19 PM, Ron D'Eau Claire wrote:
> ...I've come to the conclusion that virtually every significant concept we
> use
> in our radios today was known by the late 1920's..
>
> I'm no historian of radio, but I do remember the stuff we used in the 50's.
Consider this: take an H
And the P3 is just a minor update to the Hallicrafter SP44 from the mid 40's,
Here:
http://www.ohio.edu/people/postr/bapix/SP44.htm
Same old + / - 100kc bandwidth.
73,
Bob
K2TK ex KN2TKR (1956) & K2TKR
> -Original Message-
>
> On 7/11/2011 1:57 PM, Anthony Simons wrote:
> Is there t
Having been reading and tinkering with things "radio" since the late 1940's,
I've come to the conclusion that virtually every significant concept we use
in our radios today was known by the late 1920's. Much of that work was
driven by the "space race" of the 1900 to 1930 era - the rush to have
reli
On 7/11/2011 11:13 AM, John Ragle wrote:
> I wonder how many of these beasties Hallicrafters sold? I saw one in the
> flesh during my many visits to the Station KFAR Transmitter Site on
> Farmers' Loop Road near Fairbanks, AK when I was a sub-teen.
I too have seen one, a beautiful example of pre-w
I wonder how many of these beasties Hallicrafters sold? I saw one in the
flesh during my many visits to the Station KFAR Transmitter Site on
Farmers' Loop Road near Fairbanks, AK when I was a sub-teen. KFAR went
on the air around 1940, and probably used the dual-diversity receiver to
get inform
While waiting on your Elecraft kit you might want to read up on a dual
diversity receiver. Radio Shack had the Hallicrafter Skyrider with dual
diversity receiver that had Infinite Adjacent Channel Rejection on page
two of their 1939 catalog! Is there truly anything new in electronics?
See it here.
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