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Peter,

I find your post very interesting. I just ordered an 817 yesterday
and without even trying it yet, or seeing your post until just
now, I ordered a pair of 20 meter Maldol whips having in mind to
do almost exactly what you describe, right down to using the Radio
Shack mini box and connectors to make the center junction. If it
works out OK I'll get pairs of loading coils for the other bands.
I guess I have enough experience with whips and verticals to know
that this thing is not going to work very well without a good
counterpoise so let's dispense with that idea right off the bat.
The dipole configuration solves that problem. However, one
difference in my plan is instead of using the PVC pipe as a mast
at the center of a horizontal dipole, I would slide one of the
whips into the PVC pipe for support and configure it as a center
fed "vertical" dipole. I should be able to mount that as a
temporary antenna on my boat simply by standing it up in a fishing
rod holder. I wonder if anyone has tried anything like that? I'll
look forward to any pointers you may be able to provide and I will
certainly share my own experiences with the group.

----
73, Rich - W3ZJ

From: "Peter A. Brandenberg" <peter@b...>
Date: Fri May 11, 2001 11:30 pm
Subject: Maldol mini-dipole and portable 10' mast.


I was tired of trying to match a counterpoise to my Maldols, so I
made a
small dipole out of a set of two for each band. It works like a
charm! I
used a Radio Shack plastic box about 1.5" x 3" and put a coax
connector at
the end, and on either side a male jack for each of the Maldol
whips. Then
I bought a 10' length of 3/4" PVC and cut it into 24" pieces with
connecting
sleeves at the end of each piece. Then I can easily carry the
whole
shebang, 817, paddle, mike, battery, dipoles, and 10' mast in a
small
carrying case for easy setup.

I also have the auto-tuner that helps get the SWR to 1:1. I found
that the
20 meter Maldol is resonant at 13.8 and to get it up to 14.05 or
higher I
have to compress the whips several inches, losing radiation area.

I'd be happy to share details should anyone want them.

Also can someone tell me how I can get the 817 up to 5 watts if I
use a 12
volt battery???? Apparently if the radio doesn't see 13 volts it
runs only
2.5 watts. That is dumb!

Thanks, 73, Peter K2MMT



-----
73, Rich - W3ZJ
www.w3zj.com

From: "Richard B Drake" <rich@...>
To: <FT817@...>
Sent: Tuesday, May 15, 2001 5:25 PM
Subject: [FT817] RE: Maldol mini-dipole and portable 10' mast


However, one

difference in my plan is instead of using the PVC pipe as a mast
at the center of a horizontal dipole, I would slide one of the
whips into the PVC pipe for support and configure it as a center
fed "vertical" dipole.

VERY interesting idea! Please let us know how it works out ....

73,
Stephen
W3SMK

Another antenna support option is a replacement fiberglass tent pole. I
got 1 at Wal-Mart for about $6. It's about 8' long, held together by a
shock cord run thru the center. It has aluminum couplers on 1 end of
each piece & folds into 4 pieces. I haven't used it with an FT-817 yet
(haven't sold enough excess gear) but it works great for 2m portable
ops.
73, Fil W8FIL

Richard B Drake wrote:

Peter,

I find your post very interesting. I just ordered an 817 yesterday
and without even trying it yet, or seeing your post until just
now, I ordered a pair of 20 meter Maldol whips having in mind to
do almost exactly what you describe, right down to using the Radio
Shack mini box and connectors to make the center junction. If it
works out OK I'll get pairs of loading coils for the other bands.
I guess I have enough experience with whips and verticals to know
that this thing is not going to work very well without a good
counterpoise so let's dispense with that idea right off the bat.
The dipole configuration solves that problem. However, one
difference in my plan is instead of using the PVC pipe as a mast
at the center of a horizontal dipole, I would slide one of the
whips into the PVC pipe for support and configure it as a center
fed "vertical" dipole. I should be able to mount that as a
temporary antenna on my boat simply by standing it up in a fishing
rod holder. I wonder if anyone has tried anything like that? I'll
look forward to any pointers you may be able to provide and I will
certainly share my own experiences with the group.

----
73, Rich - W3ZJ

From: "Peter A. Brandenberg" <peter@b...>
Date: Fri May 11, 2001 11:30 pm
Subject: Maldol mini-dipole and portable 10' mast.


I was tired of trying to match a counterpoise to my Maldols, so I
made a
small dipole out of a set of two for each band. It works like a
charm! I
used a Radio Shack plastic box about 1.5" x 3" and put a coax
connector at
the end, and on either side a male jack for each of the Maldol
whips. Then
I bought a 10' length of 3/4" PVC and cut it into 24" pieces with
connecting
sleeves at the end of each piece. Then I can easily carry the
whole
shebang, 817, paddle, mike, battery, dipoles, and 10' mast in a
small
carrying case for easy setup.

I also have the auto-tuner that helps get the SWR to 1:1. I found
that the
20 meter Maldol is resonant at 13.8 and to get it up to 14.05 or
higher I
have to compress the whips several inches, losing radiation area.

I'd be happy to share details should anyone want them.

Also can someone tell me how I can get the 817 up to 5 watts if I
use a 12
volt battery???? Apparently if the radio doesn't see 13 volts it
runs only
2.5 watts. That is dumb!

Thanks, 73, Peter K2MMT



-----
73, Rich - W3ZJ
www.w3zj.com


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