the issue you're going to have is the tuner internal to the radio is still set to the transmit antenna. when you switch it to the loop it's tuning settings ARE going to be different. which can account for some of loss of rf on receive when it's turned on. ideally you would want to turn off the tuner on receive :D
Dammit. Take your science elsewhere. It has no place in this hobby! :) That didn't cross my mind in all honesty. Too much effort to introduce a microcontroller to issue CAT commands to disable the tuner (if that's possible), but it's still viable for a resonant antenna at least.
Thanks very much Nathan. Looks like you have things sorted, just need to get the loop RX better, but still keep the noise away. I have been thining deeply about your comment on the ~manufacture the box~ video where you made reference to the insulating tape to stop the relays contacting the case if they dropped away from the sticky pads. Why didnt you use the lid of the box as a lid and put the printing on the top, instead of using the lid as the base, or are you worried things might move about in normal use?
Good question. If I built it all on the bottom, it would have made putting it together a bit of a nightmare and I'd have had to use flexible cable for the RF instead of solid copper as as to reach the so239's.
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the issue you're going to have is the tuner internal to the radio is still set to the transmit antenna. when you switch it to the loop it's tuning settings ARE going to be different. which can account for some of loss of rf on receive when it's turned on. ideally you would want to turn off the tuner on receive :D
Dammit. Take your science elsewhere. It has no place in this hobby! :) That didn't cross my mind in all honesty. Too much effort to introduce a microcontroller to issue CAT commands to disable the tuner (if that's possible), but it's still viable for a resonant antenna at least.
when are going to demonstrate TX also :)
Thanks very much Nathan. Looks like you have things sorted, just need to get the loop RX better, but still keep the noise away. I have been thining deeply about your comment on the ~manufacture the box~ video where you made reference to the insulating tape to stop the relays contacting the case if they dropped away from the sticky pads. Why didnt you use the lid of the box as a lid and put the printing on the top, instead of using the lid as the base, or are you worried things might move about in normal use?
Good question. If I built it all on the bottom, it would have made putting it together a bit of a nightmare and I'd have had to use flexible cable for the RF instead of solid copper as as to reach the so239's.
@@nathanw851 Good point, well presented. I knew there must be some sensible reason.