VK4AQJ > 20-09-2018, 06:16 AM
VK4ADC > 20-09-2018, 06:47 AM
VK4WDM > 20-09-2018, 07:09 AM
(20-09-2018, 06:47 AM)VK4ADC Wrote: It may not be spaced correctly for 450 ohm line but in the early days when everybody used open line feeders :
http://www.ssapl.com.au/product/44486-kn...uble-throw
Then again, you could disassemble the basic bits from this and reassemble on a different insulating material (eg kitchen chopping board) with the spacing set up differently to maintain the 450 ohm spacing.
VK4AQJ > 21-09-2018, 01:36 PM
VU2NAN > 19-01-2019, 04:27 PM
VK4ADC > 20-01-2019, 10:58 AM
(19-01-2019, 04:27 PM)VU2NAN Wrote: Hi OM Jim,
Should you ever need remote operation, a DPDT Latching Relay would be the right choice as it would obviate the need to keep relay coils on continuously.
73,
Nandu.
VU2NAN > 20-01-2019, 04:43 PM
VK5ZD > 20-01-2019, 09:54 PM
(20-01-2019, 10:58 AM)VK4ADC Wrote: The physical closeness of the pairs of DPDT relay contacts within a single relay unit would not retain the 450 ohm characteristic impedance of the open wire line.
VK6ZFG > 04-03-2019, 05:17 PM
VK2CSW > 04-03-2019, 05:42 PM
VK6ZFG > 04-03-2019, 06:21 PM
VK3RX > 05-03-2019, 01:51 PM
VK4AQJ > 29-10-2019, 12:57 PM
(05-03-2019, 01:51 PM)VK3RX Wrote: My open wire line is about 100mm apart and goes to a remote antenna coupler under the eaves of the house.
About 300mm away from the coupler I have automotive bullet connectors on each line for quick disconnect in case of storms. These are covered for water proofing, but I'm also looking for something better.
These have caught my eye:
https://www.jaycar.com.au/waterproof-sol...e/p/PP5102
https://www.jaycar.com.au/waterproof-sol...e/p/PS5100