This filter is a plug-in for Argosy I and II, Omni V and VI,
Omni B and C, Orion and Triton IV. It can be wired-in for the
Argonaut 506, 509 and 515. See following compatibility chart:
http://www.qth.com/inrad/tentec_menu.htm
455 kHz 6 dB bandwidth and 2.1:1 6/60 dB Shape Factor is
a direct substitute for the Ten-Tec #217 500 Hz filter. See
Inrad's Performance Curve here:
http://www.qth.com/inrad/graphs/759.gif
Inrad's price is $115 plus $6 S&H (Priority). Ten-Tec #217 is
$109 plus $6.75 (UPS surface). First $85 check or money
order gets it shipped to USA only via Priority Mail in original
packaging. This filter works fine but I plan to use Inrad's #352
kit in my Orion and no longer have a use for it.
73, Bill W4ZV
P.S. Personal checks may require clearing time. Money
orders or bank checks will ship the same day received.
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