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Andrew2 · 11th Jul 2019, 8:23 am

Bazz - I have owned a Wellbrook 1530 since the late 90's (I think) and it's an excellent performer. I've also built a semi-clone using a kids' plastic hula hoop (one turn of wire inside) and the famous PA1M two-transistor loop amplifier.
It works fine, but with slightly higher levels of IMD at the sum and difference frequencies of the very strong MW stations within a few miles of here.
I've also made another version that is optimised for LF listening which gets a good signal from the SAQ transmissions on 17.2 kHz using more turns, different ferrite for the o/p transformer and a LPF to keep MW out. Without my lovely loops my hobby would be long dead due to local noise.

11th Jul 2019, 8:23 am	#10
Andrew2 Nonode Join Date: Mar 2010 Location: Dukinfield, Cheshire, UK. Posts: 2,037	Re: The Wellgood Magloop Amp Bazz - I have owned a Wellbrook 1530 since the late 90's (I think) and it's an excellent performer. I've also built a semi-clone using a kids' plastic hula hoop (one turn of wire inside) and the famous PA1M two-transistor loop amplifier. It works fine, but with slightly higher levels of IMD at the sum and difference frequencies of the very strong MW stations within a few miles of here. I've also made another version that is optimised for LF listening which gets a good signal from the SAQ transmissions on 17.2 kHz using more turns, different ferrite for the o/p transformer and a LPF to keep MW out. Without my lovely loops my hobby would be long dead due to local noise. __________________ Andy G1HBE. Last edited by Andrew2; 11th Jul 2019 at 8:33 am.