vertical Hi Luis, Am 09.06.2015 12:37, schrieb VIGILANT Luis Fern=E1ndez: I'm using a Ultrabeam V6-40 vertical antenna. My idea is to use it just con= necting the inner pin of the PL to the loading coil, once removed the actual counterpoise wires for HF band= s. The inner pin of the PL connects with the copper-berilium tape which forms the vertical element of the anten= na. If you remove the counterpoise wire from the PL connector, the screen is fl= oating so there can be no HV problems. Or do i missunderstand something? A normal PL-jack may handle 3 kV but 6 kV is not ideal for a longer time i = think :-) And you will have 24 kV at 800 W ;-) Probably the safer way would be to retract the original element completely = and use just the fiberglass pole to support a dedicated wire. Yes, maybe a better idea. But you can start at low power, like you did so far and see the improvement= over the horizontal loop. The later, if the PL jack burned down, you can s= earch for another solution :-) 73, Stefan --_000_579355A36AEE9D4FA555C45D556003AB1B115DF5servigilantvigi_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Stefan

Thank you for your comments on th= is <crazy> topic

If you remove the counterpoise wire from the PL = connector, the screen is floating so there can be no HV problems. Or do i missunderstand something?
A normal PL-jack may handle 3 kV but 6 kV is not ideal for a longer time i = think :-) And you will have 24 kV at 800 W ;-)

You are right. PL connector has no coaxial inside, just inner to vertical e= lement and outer to external screw were radials must be connected

So removing radials there is no r= isk of HV break. My fear is for the stepper motor which is very close insid= e the case. If the motor gets burned

I will definetly have to look for= another solution

BTW. Those 24kV at 800 W can expl= ain some pictures shown in this reflector ;-)

Will test it at low power first a= nd see what happens. Think I can measure induced voltage on motor coils and= this will show the risk of increasing power

I'm still in the process of getti= ng access to the fire extiguish pipe to clamp a wire up to the antenna. It is not easy, but can be done

&= nbsp;

73 de Luis

EA5DOM

De: owner-rsgb_lf_group@blacksheep.= org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de DK7FC
Enviado el: mi=E9rcoles, 10 de junio de 2015 16:35
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: EA5DOM <crazy> vertical

Hi Luis,

Am 09.06.2015 12:37, schrieb VIGILANT Luis Fern=E1ndez:

I'm using a Ultrabeam V6-40 vertical antenna. My idea i= s to use it just connecting the inner pin of the PL

to the loading coil, once removed the actual counterpoise wi= res for HF bands. The inner pin of the PL connects

with the copper-berilium tape which forms the vertical eleme= nt of the antenna.

If you remove the counterpoise wire from the PL connector, the screen is fl= oating so there can be no HV problems. Or do i missunderstand something? A normal PL-jack may handle 3 kV but 6 kV is not ideal for a longer time i = think :-) And you will have 24 kV at 800 W ;-)

Probably the safer way would be to retract the original elem= ent completely and use just the fiberglass pole

to support a dedicated wire.

Yes, maybe a better idea.

But you can start at low power, like you did so far and see the improvement= over the horizontal loop. The later, if the PL jack burned down, you can s= earch for another solution :-)

73, Stefan
--_000_579355A36AEE9D4FA555C45D556003AB1B115DF5servigilantvigi_--