I am going to install one of these units at my location.

The printed material that came with the unit says nothing should be between
the control box and the relay box.

Well, does this mean the control box will handle the 1200-1500 watts from my
linear? that would be the last piece of equipment in the line.

Need some input please!

I believe that this is the unit that uses the coax to send the voltage to
the relay. What you are reading must simply be saying that you don't have
to have seperate voltage wires going from your control box out to the relay
at your antenna. Your antenna coax carries this voltage to the relay.

Ameritron does make a unit that requires voltage wiring to be run to the
relay.

Does this help ?

73 de jim K4PYT

nuttin wrote:
I am going to install one of these units at my location.

The printed material that came with the unit says nothing should be between
the control box and the relay box.
In particular, anything that is a DC short to ground, or a DC open in
the transmission line (such as some transient suppressors)..

It sends AC (actually either or both halves of rectified AC) up the wire
to control the relays.


Well, does this mean the control box will handle the 1200-1500 watts from my
linear? that would be the last piece of equipment in the line.

Need some input please!

Jim Lux wrote:

nuttin wrote:
I am going to install one of these units at my location.

The printed material that came with the unit says nothing should be
between the control box and the relay box.
In particular, anything that is a DC short to ground, or a DC open in
the transmission line (such as some transient suppressors)..

It sends AC (actually either or both halves of rectified AC) up the wire
to control the relays.


Well, does this mean the control box will handle the 1200-1500 watts from
my linear? that would be the last piece of equipment in the line.

Need some input please!



I know how it works, what I want to know is if my control box - located
right after the linear can handle the power.

There is no power rating in my couple sheets of instructions

nuttin wrote:
Jim Lux wrote:


nuttin wrote:

I am going to install one of these units at my location.

The printed material that came with the unit says nothing should be
between the control box and the relay box.

In particular, anything that is a DC short to ground, or a DC open in
the transmission line (such as some transient suppressors)..

It sends AC (actually either or both halves of rectified AC) up the wire
to control the relays.


Well, does this mean the control box will handle the 1200-1500 watts from
my linear? that would be the last piece of equipment in the line.

Need some input please!




I know how it works, what I want to know is if my control box - located
right after the linear can handle the power.

There is no power rating in my couple sheets of instructions

We use a couple of them here at JPL (W6VIO) with a kilowatt with no
problem. The power limiting device is the series blocking capacitor (a
couple disk ceramics in parallel, I think) which would have to carry the
full RF current (say, 5-10 Amps). I don't know that we've run full
power in a 100% duty factor application like RTTY or SSTV, but
certainly, it's stood up to CW contesting.

Jim Lux wrote:

nuttin wrote:
Jim Lux wrote:


nuttin wrote:

I am going to install one of these units at my location.

The printed material that came with the unit says nothing should be
between the control box and the relay box.

In particular, anything that is a DC short to ground, or a DC open in
the transmission line (such as some transient suppressors)..

It sends AC (actually either or both halves of rectified AC) up the wire
to control the relays.


Well, does this mean the control box will handle the 1200-1500 watts
from my linear? that would be the last piece of equipment in the line.

Need some input please!




I know how it works, what I want to know is if my control box - located
right after the linear can handle the power.

There is no power rating in my couple sheets of instructions

We use a couple of them here at JPL (W6VIO) with a kilowatt with no
problem. The power limiting device is the series blocking capacitor (a
couple disk ceramics in parallel, I think) which would have to carry the
full RF current (say, 5-10 Amps). I don't know that we've run full
power in a 100% duty factor application like RTTY or SSTV, but
certainly, it's stood up to CW contesting.


thanks, thats exactly what I needed to know.