Barrett wrote:
Just went out to get things ready to try the Ariel's out tomorrow and it
occurred to me that the 20ft pole is resting on the patio. To make this
work, would I need to lift the pole off the floor and would 1ft be enough?

Depends on whether the patio is conductive or not.
Probably best to rest the base on an insulator.
Also be aware that, at 100 watts, there will be
hundreds, if not thousands of volts present at
the base of the pole. I once keyed down while
a cat was standing on one of my radials. Not
sure where it went, but it might have gone
into orbit. Have you considered sleeving the
pole inside PVC pipe for safety reasons?
--
73, Cecil http://www.w5dxp.com

In message , Cecil Moore
writes
Barrett wrote:
Just went out to get things ready to try the Ariel's out tomorrow and
it occurred to me that the 20ft pole is resting on the patio. To make
this work, would I need to lift the pole off the floor and would 1ft
be enough?

Depends on whether the patio is conductive or not.
Probably best to rest the base on an insulator.
Also be aware that, at 100 watts, there will be
hundreds, if not thousands of volts present at
the base of the pole. I once keyed down while
a cat was standing on one of my radials. Not
sure where it went, but it might have gone
into orbit. Have you considered sleeving the
pole inside PVC pipe for safety reasons?

A glass jar (eg a jam jar) makes an effective insulator for the base of
a pole. Or a polythene bucket!
--
Ian

Ian Jackson wrote:
A glass jar (eg a jam jar) makes an effective insulator for the base of
a pole. Or a polythene bucket!

Remember when we used to use those one quart
Coca-Cola bottles that down-spouts fit over
perfectly?
--
73, Cecil http://www.w5dxp.com

Cecil, got a question for you.
I have another 20ft pole mounted on the back of my house and it is rested on
the patio floor. I plane to put up a Cushcraft MA5B on this pole and a 2/70
collinear on top. Does this mean that there will be high voltage on the pole
beneath the beam from the beam or from the collinear?

The children will be out in the garden when the weather gets better.

Thanks


"Cecil Moore" wrote in message
...
Barrett wrote:
Just went out to get things ready to try the Ariel's out tomorrow and it
occurred to me that the 20ft pole is resting on the patio. To make this
work, would I need to lift the pole off the floor and would 1ft be
enough?

Depends on whether the patio is conductive or not.
Probably best to rest the base on an insulator.
Also be aware that, at 100 watts, there will be
hundreds, if not thousands of volts present at
the base of the pole. I once keyed down while
a cat was standing on one of my radials. Not
sure where it went, but it might have gone
into orbit. Have you considered sleeving the
pole inside PVC pipe for safety reasons?
--
73, Cecil http://www.w5dxp.com

Barrett wrote:
Cecil, got a question for you.
I have another 20ft pole mounted on the back of my house and it is rested on
the patio floor. I plan to put up a Cushcraft MA5B on this pole and a 2/70
collinear on top. Does this mean that there will be high voltage on the pole
beneath the beam from the beam or from the collinear?

Are the beam and collinear isolated from the pole?
If so, there's probably no real problem.

If a mobile antenna is being used with the pole as
the counterpoise, then about half of the RF energy
flows in the pole. RF burns can be the result.
--
73, Cecil http://www.w5dxp.com

No, the beam and collinear are not isolated from the pole.




"Cecil Moore" wrote in message
...
Barrett wrote:
Cecil, got a question for you.
I have another 20ft pole mounted on the back of my house and it is rested
on the patio floor. I plan to put up a Cushcraft MA5B on this pole and a
2/70 collinear on top. Does this mean that there will be high voltage on
the pole beneath the beam from the beam or from the collinear?

Are the beam and collinear isolated from the pole?
If so, there's probably no real problem.

If a mobile antenna is being used with the pole as
the counterpoise, then about half of the RF energy
flows in the pole. RF burns can be the result.
--
73, Cecil http://www.w5dxp.com

Barrett wrote:
No, the beam and collinear are not isolated from the pole.

Are they a "Plumber's Delight" design?
--
73, Cecil http://www.w5dxp.com

Sorry, I don't understand, what do you mean by a Plumber's Delight design?


"Cecil Moore" wrote in message
t...
Barrett wrote:
No, the beam and collinear are not isolated from the pole.

Are they a "Plumber's Delight" design?
--
73, Cecil http://www.w5dxp.com

Barrett wrote:
Sorry, I don't understand, what do you mean by a Plumber's Delight design?

Sorry, a plumber's delight design is where the support
pole is attached to a voltage node on the antenna so no
RF current flows in the pole. The alternative is to
insulate the balanced Yagi from the pole.
--
73, Cecil http://www.w5dxp.com