开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育

Re: My PA0FRI active loop receiving antenna


 

Dhiru, thank you for sharing. I can see that you went to quite a lot of work bench testing and it is well constructed. Nice work.
But I built one of those a year or two ago. I used it for a couple of days. I have a several strong local BCB stations. The intermod distortion was horrific. It might be a good amplifier in a rural area but not here. It was also quite deaf on LW and NDB bands presumably because of its higher input impedance. My Wellgood and LZ1AQ clones are infinitely better in terms of IMD, and sensitivity. The PA0FRI might have produced more S-units at some frequencies, but SNR was the same. I for one can't stand listening to a rare or un-identified station for many minutes, just to find out I'm listening to a harmonic or spur. This one is now in my junk box. Sorry.
But please keep building, testing and posting. Tom

Join [email protected] to automatically receive all group messages.