HI Pete,
I use Russian B1B vacuum relays for all RF switching, for high power 160m
switching B2B vacuum relays are recommended. Hope you can get them there.
Good luck.
>Вторник, 10 декабря 2019, 16:31 UTC от N4ZR :
>
>Now that I've determined that my transmitting antenna must be
>disconnected,
Thanks everyone who responded - I think I know enough to proceed.
I had wondered about the need to open the shield side of the coax - I
have 16 turns of RG-400 on a Type 31 core right at the base of the
inverted L. If the darned rain/snow ever stops, I think I'll
temporarily re-connect the sh
The need to disconnect the feedline shield is to block common mode signals.
A K9AY approved **EXCELLENT** common mode block (not a regular "balun" with
likely awful blocking on 160m), or (GASP) an isolation transformer will
take care.
In the case quoted, with the coax center contductor opened, the
Pete,
See RF parts.com, search vacuum relay VC2T-13.2. SPDT will allow you to
change your mind about what state you want with no voltage to winding. And
you will not need to buy a 24 volt power supply.
Rated 12 kV will handle anything ham QRO. These are new, currentLy
manufactured items.
73, an
You should probably look for a double pole, I’ve been told you need to open the
shield as wellI’ve had similar interference on my hi z array. I’ve opted to
go a different route
Sent from my iPad
> On Dec 10, 2019, at 11:30 AM, N4ZR wrote:
>
> Now that I've determined that my transmi
The forecast consensus: Cycle 25 will peak in July 2025 (+/- 8 months),
with a smoothed sunspot number of 115.
Cycle 25 is forecast to be average in intensity and similar to Cycle 24.
The panel concurred that solar minimum will occur in April 2020 (+/- 6 months).
If their solar minimum pre
Now that I've determined that my transmitting antenna must be
disconnected, in order for my K9AY loop to work successfully, can anyone
tell me what sort of ratings are required for the relay required to do
this remotely? I'm assuming a vacuum relay, but in looking at the MGS4U
list of availabl
Had a lot of fun in the contest made 139 contacts. I made just a few to EU qrm
from other stations made it tough. I worked into Caribbean OK. But I'm with Wes
it was more like a WAS contest. I just picked up 7610 but did not have time to
get it ready...so maybe better next year. Some things I le
