UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Questions on 160/80 metre AM transmitters.

Aub · 10th Jan 2023, 3:12 pm

They should be ok, if not as good. I appreciate it's harder to come by ceramic formers. My first Topband rig, as pictured in this thread, actually uses a coil with a ferrite adjustable core, but sealed afterwards. It only ran at around 900Khz though, so needed the extra inductance that the ferrite core gave. When I used to work CW on it, as far as I recall I never had any complaints of drift. I guess it would have depended on the bandwidth of the other station's receiver.

Cheers

Aub

10th Jan 2023, 3:12 pm	#127
Aub Nonode Join Date: Mar 2005 Location: Nuneaton, Warwickshire, UK. Posts: 2,039	Re: Questions on 160/80 metre AM transmitters. They should be ok, if not as good. I appreciate it's harder to come by ceramic formers. My first Topband rig, as pictured in this thread, actually uses a coil with a ferrite adjustable core, but sealed afterwards. It only ran at around 900Khz though, so needed the extra inductance that the ferrite core gave. When I used to work CW on it, as far as I recall I never had any complaints of drift. I guess it would have depended on the bandwidth of the other station's receiver. Cheers Aub __________________ Life's a long song, but the tune ends too soon for us all.