DPDT Coax Switch (sort of)?
 

Does anyone know of a source for a switch which accepts two incoming
PL-259's (A/B) and spits out either A/B or B/A, depending on switch setting.
The object is to switch the feedpoints of a rhombic antenna from one end to
the other. The two "incoming" lines to the switch are from either end of
the rhombic. The two outgoing (from the switch) go to a dummy load and the
tuner/transceiver.

TIA.

Bill W2ET

On Mon, 21 Feb 2005 09:46:22 -0500, "William M. Bickley"
wrote:

Does anyone know of a source for a switch which accepts two incoming
PL-259's (A/B) and spits out either A/B or B/A, depending on switch setting.
The object is to switch the feedpoints of a rhombic antenna from one end to
the other. The two "incoming" lines to the switch are from either end of
the rhombic. The two outgoing (from the switch) go to a dummy load and the
tuner/transceiver.

What you are looking for is called a "transfer switch". You may want
to look for a surplus one. Transco made such a thing, both as relays
and as motor-driven switches.

None of these will be found with SO-239's tho.

Bill:

Some many years ago I needed such a switch for some experiments on 2 meters. Since it was the weekend and I was in a
hurry, I took one of the old A. H. & H. DPDT toggle switches, some bus wire and 4 N connectors and made one with leads
as short as I could make them. It is still in use, and makes a surprisingly small impedance bump in the line. I
suspect at HF, it would be invisible.

--
Crazy George
The attglobal.net address is a SPAM trap. Please change that part to: attdotbiz properly formatted.
"William M. Bickley" wrote in message ...
Does anyone know of a source for a switch which accepts two incoming
PL-259's (A/B) and spits out either A/B or B/A, depending on switch setting.
The object is to switch the feedpoints of a rhombic antenna from one end to
the other. The two "incoming" lines to the switch are from either end of
the rhombic. The two outgoing (from the switch) go to a dummy load and the
tuner/transceiver.

TIA.

Bill W2ET

"Crazy George" wrote in message
...
Bill:

Some many years ago I needed such a switch for some experiments on 2
meters. Since it was the weekend and I was in a
hurry, I took one of the old A. H. & H. DPDT toggle switches, some bus
wire and 4 N connectors and made one with leads
as short as I could make them. It is still in use, and makes a
surprisingly small impedance bump in the line. I
suspect at HF, it would be invisible.

--
Crazy George

That will work. If you are running high power, you may also want to consider
a wide spaced rotary wafer switch.

Tam/WB2TT


The attglobal.net address is a SPAM trap. Please change that part to:
attdotbiz properly formatted.
"William M. Bickley" wrote in message
...
Does anyone know of a source for a switch which accepts two incoming
PL-259's (A/B) and spits out either A/B or B/A, depending on switch
setting.
The object is to switch the feedpoints of a rhombic antenna from one end
to
the other. The two "incoming" lines to the switch are from either end of
the rhombic. The two outgoing (from the switch) go to a dummy load and
the
tuner/transceiver.

TIA.

Bill W2ET