13-06-2019, 07:33 PM
Ezat
You can check your SWR meter to see how nominally correct it really is.
Reduce your transmitter drive so that you only have 1-5 watts RF out, say on 14.15 MHz.
Put the Tx through the SWR meter into a 50 ohm load - non-inductive eg carbon resistors, measure SWR, should be 1:1 or thereabouts.
Take off the load and measure SWR - should be full scale ie infinity.
Put a short circuit across the output - should be full scale ie infinity.
Needless to say that these last two tests should be very brief.
Try changing bands still with the 50 ohm load attached & measure SWR on each one. Lower SWR on 3.6MHz means that the load is reactive, probably inductive at 20M.
Better RF load required...
But good on the QSO. I am guessing that it took place about 3 - 4 -5PM when propagation favoured W-land on 20M.
Doug
You can check your SWR meter to see how nominally correct it really is.
Reduce your transmitter drive so that you only have 1-5 watts RF out, say on 14.15 MHz.
Put the Tx through the SWR meter into a 50 ohm load - non-inductive eg carbon resistors, measure SWR, should be 1:1 or thereabouts.
Take off the load and measure SWR - should be full scale ie infinity.
Put a short circuit across the output - should be full scale ie infinity.
Needless to say that these last two tests should be very brief.
Try changing bands still with the 50 ohm load attached & measure SWR on each one. Lower SWR on 3.6MHz means that the load is reactive, probably inductive at 20M.
Better RF load required...
But good on the QSO. I am guessing that it took place about 3 - 4 -5PM when propagation favoured W-land on 20M.
Doug
Doug VK4ADC @ QG62LG51
http://www.vk4adc.com
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If you have a comment or question, post it as it may trigger or answer the query in someone else's mind.
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.