Have my vertical working great and have a small Delta-loop low band receive
antenna BUT the Ten Tec Jupiter doesn't have a separate receive antenna like a
K2, for instance (I borrowed a K2 to try out but the buttons/controls are to
small for me to operate as I have a severe case of peripheral
Traditionally a T/R switch means a switch to be used the other way, to allow
you to move a single antenna between your separate transmitter and receiver.
Ironic that here we are in the 21st century and some of use an external box to
do the reverse function!
To switch between transmit and
Ahhh...luv it when K.I.S.S. idea passes by, TimI can do that!! So
simple, how come I didn't think that solution up!!
Much appreciated! Jim R. K9JWV
From: tsho...@wmata.com
To: rodenkirch_...@msn.com; topband@contesting.com
Date: Mon, 13 Jan 2014 13:48:11 +
Subject: Re:
Jim,
I did the same thing years ago. I modified an old B W antenna switch,
added a 12 volt relay triggered from the amp out jack.
Even without the switch, 3 panel mount SO-239s, a relay and an enclosure
would be a minimal investment.
Doug - K1ZO
- Original Message -
From:
Hi James
There are several solutions for a separated receive port. However let me
comment on some details,
1- Small Delta loop. To be a receiver antenna the antenna gain need to be
less than 20 db, why ? simple. Connect a power meter and a 50 ohms load on
the Small Delta loop and measure how
Anyone have an RTR-1 or 1A that is excess to their needs and willing to
sell OR have another idea of how I can employ a separate receive antenna
when I have one antenna port?
Thank you, in advance, for any repliesoff line replies work for me.
72/73, Jim Rodenkirch K9JWV
Be REAL careful
I am nervous as well, Tom...hi Hi
I'm really thinking of employing a separate relay that I control with a simple
switch, vice depending on the rig to switch correctly
using a simple switch is antiquated and slow butfor certain I can control
the switch over mo betta AND prevent damage to the
I've used the loop and a KD9SV preamp with the vertical before, JC, and no
overload problems ...I run QRP power during Top Band contests.
Your cautionary notes are noted and appreciated!
Jim R. K9JWV
From: n...@comcast.net
To: rodenkirch_...@msn.com; topband@contesting.com
Date: Mon, 13 Jan
Hi JC et al, just to add to the comments of JC:
First of all it is a matter of switching timing. Always disconnect a
separate RX antenna and short the rx entry to ground before the TX chain
(with or without amp) starts to operate.
Second: Get rid of any reradiation from the TX antenna which will
If you pull a relay low to go TX and you ever lose power to the relay, lose
the relay, or lose the relay path, the system defaults with the transmitter
running into the receiver antenna.
You have to decide if that can damage RX antenna stuff. This requires a fast
relay pull in time, and a
Hoping for some help to be able to use some older Philly. The factory
tells me their grips won't work on parallel strand construction which
is what I have, epoxy potted sockets are required. However, they only
pot at the factory (liability etc etc) which means tossing 6 x 300' of
5/8 45klb
Hi Grant!
I worked at WDAE Radio in Tampa, FL back in the 80's and 90's. The engineer
before me decided to try the new technology Philly-strand guy lines on the
AM directional towers because they had constant problems with the original
segmented steel guy wires/egg insulators constantly arcing
Announcing the Top Band Dinner at the 2014 Visalia DX Convention.
The dinner wiil be held on Friday April 4, 2014. Craig Thompson, K9CT, will be
the featured speaker: A Tale of Two Islands — Wake and Amsterdam. The Low
Bands: Results, Comparisons and Contrasts.
See this website for complete
The clickable link is apprently stripped out but the server.
**
Announcing the Top Band Dinner at the 2014 Visalia DX Convention.
The dinner wiil be held on Friday April 4, 2014. Craig Thompson, K9CT, will be
the featured speaker: A Tale of Two Islands — Wake and Amsterdam.
Sorry, I meant to send this follow-up to the entire reflector.
The newer version Philly-strand is excellent - it has become the standard
for guying insulated AM broadcast towers, and is also used on some FM TV
broadcast towers when guy lines have to pass thru the aperture of side-mount
VHF and
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