There are exceptions. If you look at the schematics of many transceivers,
it looks as if they were designed by committee. Elecraft, TenTech and some
others do not have excessive stages and are not current hungry in receive. If I
recall the TenTec Scout receive current was around 50ma or so in receive
naturally somewhat dependent on audio output level.
It just amazes me how many individual transistors and IC's they can stuff
into a transceiver and sometimes I wonder why and what were they thinking.
73
Bill wa4lav
________________________________
From: Amps <amps-bounces@contesting.com> on behalf of Jim Brown
<jim@audiosystemsgroup.com>
Sent: Thursday, April 27, 2017 4:29 PM
To: amps@contesting.com
Subject: Re: [Amps] Emergency communication
YES! Wayne Burdick, principal and chief engineer at Elecraft, comes out
of the world of backpacking rigs, and his receivers are optimized to
minimize current draw. The K3/K3S, designed for desktop use, draw the
most, about 1A. The KX3, designed primarily for backpacking, draws about
150 mA. Max out is about 10W, and there's an outboard 100W brick amp
that very neatly integrates with the KX3 (there's an optional tuner,
controlled by buttons on the KX3. I loaned my KX3 and KXPA100, along
with a 20Ah LiFePO4 battery to a team that backpacked in about 2 miles
with a 1,000 ft climb to activate a rare 6M grid in Nor Cal. W6GJB also
loaned his 20Ah battery.
They adopted W7GJ's excellent strategy to save battery by NOT calling
CQ, but rather posting to VHF chat rooms for those wanting a QSO to call
him, and he responds to those he copies. At the end of the day, they
were still on the first battery.
73, Jim K9YC
On Thu,4/27/2017 1:15 PM, Fuqua, Bill L wrote:
> What is sad is that most ham transceivers draw way too much current in
> receive. Often as much as an Amp. A battery would last much longer if the
> receive current drain on the battery was a tenth of that.
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
Amps Reflector - Contesting.com Ham Radio Mailing
Lists<http://lists.contesting.com/mailman/listinfo/amps>
lists.contesting.com
Welcome to the Amplifier mailing list! This list is intended for the exchange
of information on HAM RADIO Amplifiers related topics ONLY. Our goal is to keep
...
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|