[Skimmertalk] WA6KBL's QS1R mods

[Bob Wilson, N6TV]

Forwarding for WA6KBL because this reflector rejects posts with
attachments, apparently.

See https://www.kkn.net/~n6tv/QS1R_WA6KBL.jpg .

73,
Bob, N6TV
---------- Forwarded message ---------
From: Jeffrey Pawlan
Date: Wed, Oct 31, 2018 at 5:55 PM
Subject: attachment did not work
To: Bob Wilson, N6TV <n6tv at arrl.net>

Please put on your site and publish:


Dear Bob,

The photo shown of Clive's QS1R will work in a cool environment but is
not a thorough fix of Phil's problematic design.

Here is a photo of how I did it.  Please note the much higher power
regulators and note they are mounted on free air flowing heatsinks.
Additionally note the real heatsinks that I installed on the QS1R ICs
that get hot.  Also mounted on the inside of the case with heat
conductive epoxy is a very high power resistor which drops the input
voltage to a reasonable level before going into the low voltage
regulator that draws the extreme amount of current. Therefore the
resistor is dissipating the hat rather than the regulator.

My case has a small fan sucking air into the shielded enclosure and a
second fan pulling the hot air out. The added connectorized cable with
the read and black wires is for the fans.

73,

Jeffrey Pawlan  WA6KBL