[ICOM] AT500 problem on 18 and 24 MHz

[Adam Farson]

Hi Bert,

One of the wafers on the AT-500 bandswitch selects the output socket.  The
default wiring is shown on the schematic, downloadable here:

http://www.qsl.net/icom/manuals.html

You will need to move the jumpers between the bandswitch antenna-selection
wafer (S3-2) back to their default configuration. This will give 160m on J5,
80m on J4, 40/30m on J3 and 20/17/15/12/10m on J2. (J1 is not fitted, but
can be installed by removing the ID plate if you need a fifth output
socket.) You can arrange the jumpers to suit your specific needs. 

For multiple bands on one socket, simply connect the switch contacts for all
the required bands to that socket.

Cheers for now, 73,
Adam VA7OJ/AB4OJ


-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
Behalf Of Bert Almemo
Sent: 07 January 2006 15:49
To: 'ICOM Reflector'
Subject: RE: [ICOM] AT500 problem on 18 and 24 Mhz

Hi Adam and Frank,

Thanks for reply and suggestions. After having a look inside I realize that
there is no connection between ANT1 and ANT2, That means that the Windom
antenna was never connected when I switched to 18 and 24 Mhz. I worked on
the yagi with bad results!

 So how do I get the windom on ANT2 connected to the switch position 21 and
28? Is it as simple as just putting in a jumper from ANT1 to ANT2 or...?
Probably not as the yagi and the windom work on the same bands between 14
and 28 Mhz. This is confusing?????? I guess it's a problem because I have 2
antennas sometimes resonant on the same band. I probably need an external
antenna switch. Strange design of a tuner!!

Any suggestions are highly appreciated. Thanks.

73 Bert, VE3OBU




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