Saturday 30 April 2016

RX Antenna Isolator

i am now using my Receive antenna for 160. although my Rig (K3S) does ground the RX IN port on TX I decided to add a little extra protection.

after a bit of looking around on the internet I came across don's, G3BJ's page. he has a schematic for such a device on his web page G3BJ RX antenna protector along with some other designs for various other radio related stuff.

I did some shopping online for parts from here Bitsbox and now time to put it together.
I used parts as described in dons schematic.


I first layed out the parts in the box to decide where the various parts would go. Relay is a RTE20412. 12V.
 
 
 
once I had the layout I was happy with, i soldered everything in. below, all electrical soldered.  
 
 
Below, with RF lines connected, testing with 12v applied and the green phono is supplying 5V's, as if it was being keyed, PTT. I used a multimeter in continuity mode (BNC's)  to check the relay was switching when 5v's is applied (green phono).
 
 
All was good under testing, so finished boxing it up.
 
 
 
 
 
thanks don  G3BJ 
 
 
73.......

 
 

 
 


Sunday 17 April 2016

Contest Club

The UKEICC is a british based Amateur Radio Contest Club.

There are plenty of DX clubs around in the UK, but not one for Contesting.
Its a free to join club at the present.

UKEICC runs a twice monthly 80 meter sprint, one hour in lenght and have SSB and CW each month.

UKEICC have just held their NEW DX Contes,t CW and SSB legs.
PDF certificates and winners plaques available for leading entrants in various categories.

heres the link UKEICC

73...

Saturday 16 April 2016

A25UK

A group of five operators from"G" are QRV from Botswana, Africa as A25UK.


G4FAL, G4LDL, G0VJG, GM0WED and M0TGV.

Starting on 13th April 2016 for seven days.

 WEBSITE HERE

73....

Thursday 14 April 2016

Lord Howe Island

Michael G7VJR will be on lord Howe Island from 15th to 20th April 2016.

Michael will be signing VK9L/G7VJR on CW only and using wire verticals with 100W's.

IOTA OC-004

http://g7vjr.org/2016/02/vk9lg7vjr-lord-howe-island-15-20-april-2016/

73.....

Wednesday 13 April 2016

160mtr coax RX antenna

This 160mtr RX antenna is intended for a small lot or space.
gives reasonable performance for what it is.

I have used one of these for a few years now and results are pleasing.

there are one or two designs around on the internet.

COAX LOOP 
K3ZXL LOOP
COAX LOOP

try one, you might be surprised..

73..

Hello World

just a blog about my adventures in amateur radio.

73, si VKY.