|[AMRadio] The Drake TR-7 On AM|
bluebirdtele at embarqmail.com
Sat Mar 1 19:36:20 EST 2008
For what it's worth:
The Drake TR 4 will do passable AM.It's not spectacular but it works.
Still alot of bang for the buck with that rig and it will handle the less
expensive 6GJ5 tubes in the final amp.
----- Original Message -----
From: "BSugarberg" <bsugarberg at core.com>
To: "Discussion of AM Radio in the Amateur Service"
<amradio at mailman.qth.net>
Sent: Saturday, March 01, 2008 5:15 PM
Subject: [AMRadio] The Drake TR-7 On AM
> In the May, 2007 issue of Electric Radio, well-known Drake expert Jeff
> Covelli, WA8SAJ, describes a simple modification for the Drake TR-7 that
> allows it to use the 6 kc AM filter for AM transmitting, (instead of the
> default 2.3 kc SSB filter), thus allowing full double sideband AM
> 73, Bruce WA8TNC
> D. Chester wrote:
> >> A Drake TR-7. This says it simulates AM with a carrier and only the
> >> upper side band. That might not sound good
> > I would not consider transmitting with any radio that "simulates AM
> > a carrier and only one side band". That is not AM. It's just SSB with
> > poor carrier suppression, or you might say, transmits a pilot carrier
> > for a PLL BFO to lock onto. It doesn't sound good because of
> > fundamental principles of the modulation and demodulation process.
> > Don k4kyv
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