[Yaesu] New VX-5R

Thu, 26 Dec 2002 11:49:59 -0500

You will also observe the heating "Phenomenon" when using the unit on 2
Meters.

If the transmitter output stage is only 50% efficient, then for 4.5 Watts of
output power,
the radio would actually be expending 9 Watts of energy.  4.5 Watts out the
antenna
jack, and 4.5 Watts of inefficiency expended as heat.

My VX-5R gets almost "too hot to hold" on 2 Meters.

Yes you should be somewhat concerned, as heat shortens the life of most of
our
HAM equipment.  I suggest that you do not insulate the case while using the
radio.
By this, I propose, not using a nice case to help keep the heat in while
transmitting
winded ragchews.  Let your hand tell you when to stop.

Any other suggestions guys?

Happy holidays from:

K1MIJ, Wilson Caselli

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Ronald Walters
Sent: Thursday, December 26, 2002 12:02 PM
To: Yaseu Users Group
Subject: [Yaesu] New VX-5R

Santa was good, a new VX-5R arrived.  When operating on 440 Mhz at 4.5 watts
I notice that the metal back top case closest to the antenna is getting warm
if not even hot to the touch. PS - Yaesu and AES have a great sale on these
units.

Background

1.  Using the standard unit mount antenna that comes with the unit.
2.  Operating at 4.5 watts

Questions

1.  Is it a problem and should I be concerned?
2.  Could it be a high SWR with the built in antenna?
3.  Is this typical for 440 Mhz with a handheld?

Anyone else notice this?

Appreciate your input.

Happy Holidays and a very Happy New Year

Ron - W4LDE

Moderator: Ray Brown, KB�STN
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