[AMRadio] Equipment discussion -- AM "value"


VJB wa3vjb at yahoo.com
Mon Oct 3 08:42:39 EDT 2005


Jose Silva
CT1AXG

Hi Jose,
Welcome to AM !  At least that's what I get from your
questions.
To establish "value" for an AM rig you have to set
some priorities.
If you also plan to use the equipment on SSB you may
limit yourself somewhat because of likely technical
compromises. Broadly stated, most contemporary
transceivers presume the user will be using SSB, so
the audio quality on transmit and receive will
typically suffer on AM. That's because manufactuers
traditionally shortchange audio quality for SSB. For
those of us who use only AM, such rigs have little
value. There are exceptions, including the Yaesu
FT-102 which can be dressed up with some audio
modifications to sound like this:

http://www.wa3vjb.com/sound/HUZ-FT102%20(2).mp3

The older Yaesu FT-101E can also be made to sound very
good, and the purchase price for used gear like this
is less than $400.  Here's Frank's example of the
transceiver:

http://www.wa3vjb.com/sound/WY3D-Demo.mp3

On receive, the Ten-Tec RX 340 uses synchronous
detection and low-distortion audio circuitry to
recover audio that sounds like this:

http://www.wa3vjb.com/sound/DefinitiveVJB.mp3

I have to point out that the economic value is
different than the practical operating value. The
Yaesu FT1000MP sounds very, very good when
transmitting AM with a good quality microphone. Yet,
why pay for all the other stuff on there that a user
oriented toward AM would never utilize? For the person
who specializes iN AM, the same or far less money
could be spent on a rig designed with AM as its
emphasis. If you're planning vintage gear (and this is
the sort of equipment that emphasizes AM) you'll need
to sort out whether you can settle for audio that
sounds like the space shuttle, or whether you want
audio that's human-sounding: warm and high quality. In
this equation, establishing "value" is up to you
rather than recommendations from out here. You'll know
what you want.

Best of luck, and feel free when you decide among some
candidates to run them by the opionion gallery here.

Paul/VJB
Annapolis


		
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