20-05-2020, 06:33 PM
I think we all need to push on this and get submissions in else it will be defeated and discarded. Then we will never get 60M access.
Four options are presented:
> Option 1: Australia-wide access to the whole band (5351.5–5366.5 kHz) but excluding Queensland and zones around existing transmitters.
> Option 2: Australia-wide access to 5351.5–5365 kHz, that is, exclude the top 1.5 kHz to mitigate against most known sharing issues.
> Option 3: Segmented and/or channelised use to mitigate against interference to existing services.
> Option 4: No amateur use.
I suspect that #2 is the best option as it gives operators in all states access to 60M but avoids the HF Land Mobiles in that top 1.5KHz part. Non-channelised is preferred.
By convention, our HF transceivers generally have memories so #3 could be a backstop position, and we can simply program up the few preset frequencies into memories, remembering that it will need to be set as USB despite the 'normal' use of LSB below 10.0000 MHz. The issue is that the RF power levels are not preset by memories so it becomes a matter of remembering to reduce power when on 60M. Likely - maybe not.
We probably need to also provide comment on the 15W EIRP power level. Given the adjacent HF Land Mobile and Aeronautical service USERS have 100W transmit power and does not specify antenna gain or EIRP. Equal footing ??
Four options are presented:
> Option 1: Australia-wide access to the whole band (5351.5–5366.5 kHz) but excluding Queensland and zones around existing transmitters.
> Option 2: Australia-wide access to 5351.5–5365 kHz, that is, exclude the top 1.5 kHz to mitigate against most known sharing issues.
> Option 3: Segmented and/or channelised use to mitigate against interference to existing services.
> Option 4: No amateur use.
I suspect that #2 is the best option as it gives operators in all states access to 60M but avoids the HF Land Mobiles in that top 1.5KHz part. Non-channelised is preferred.
By convention, our HF transceivers generally have memories so #3 could be a backstop position, and we can simply program up the few preset frequencies into memories, remembering that it will need to be set as USB despite the 'normal' use of LSB below 10.0000 MHz. The issue is that the RF power levels are not preset by memories so it becomes a matter of remembering to reduce power when on 60M. Likely - maybe not.
We probably need to also provide comment on the 15W EIRP power level. Given the adjacent HF Land Mobile and Aeronautical service USERS have 100W transmit power and does not specify antenna gain or EIRP. Equal footing ??
Doug VK4ADC @ QG62LG51
http://www.vk4adc.com
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http://www.vk4adc.com
This Forum is only going to be as interesting as the posts it contains.
If you have a comment or question, post it as it may trigger or answer the query in someone else's mind.