[HBR] Relay switched coils?

[John Landrigan]

I am very seriously considering using a Doug DeMaw QST article on electronic switching using diodes to pick and choose toroid wound coils and miniature capacitors. I am hoping this might be a feasible scheme using EAGLE CAD PCB layout software and place everything on one single sided board.
Comments encouraged

John KA4RXP

----- Original Message -----
From: "Ian Wilson" <ianmwilson73 at gmail.com>
To: "HBR Receiver List" <hbr at mailman.qth.net>
Sent: Thursday, May 27, 2010 12:38:14 PM GMT -06:00 US/Canada Central
Subject: [HBR] Relay switched coils?

I assume that one reason for the HBR using plug-in coils was to get high Q,
thus high selectivity, good image rejection, etc, in the front end. Using a
traditional bandswitch involves long wires (somewhere), thus loss and stray
capacitance.

Would using small relays instead of a bandswitch could provide sufficiently
good connections and low strays to preserve the good performance of an
HBR-type
front end without plug-in coils?

73, ian K3IMW
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