14-02-2019, 07:29 PM
(12-02-2019, 03:16 PM)VK4ADC Wrote: The RF output power is 5 watts on all bands except for 18MHz, which is 2 watts.
From a post a few earlier....
The measured 5W (+37dBm) on 6M into a halo about 6.5 metres above ground is confirmed. It was spotted by Hayden VK7HH at 0404 through to 0444 UTC this afternoon via Es so must be getting out ok.
The 5W on HF (30, 20 and 15) is approximate and is hard to measure accurately due to the varying SWR band by band of the sloping wire antenna. The 2W on 17M is pretty close to the mark as the SWR is fairly good on that band.
The 5W value is pretty close when measured into the terminating power meter.
I'm not sure if I have a bad/intermittent BNC plug or socket on HF but will be investigating further - probably tomorrow.
PS - it's tomorrow. The issue was with the HF amp PA transistor getting too hot & not the BNC connector. I have replaced the device and dropped the RF power output back to 2 watts on all HF bands to preclude it happening again as I want this setup to be reliable over a long period of time. The WSPR data setup has been changed back to +33dBm for HF.
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.