- Joined
- Jan 1, 2000
- Messages
- 16,233
- Reaction score
- 4,202
- Points
- 113
- Age
- 81
- My Satellite Setup
-
Triple Dragon, Dreambox 8000, Echostar AD3000ip, TBS6522,6925,6983 PCie cards.
Gibertini 1.25m motorised dish driven by the AD3000, with either Inverto BU Quad or Norsat / XMW Ka LNBs . SMW 1.05m + 3 other dishes. Speccy: Promax HD Ranger+
- My Location
- The Flatlands of East Anglia
The Sinclair FM Radio was I believe only available in kit form. I constructed one in the early '60's, but was not too impressed by its performance.
Granted I was in a bit of a 'dead spot' for FM reception (the local fill-in transmitter was situated on a gasometer the other side of town) so pretty poor for a receiver with a whip aerial.
It was a superhet design with three 120kHz IF RC coupled stages, clipped to produce square waves fed to a pulse-counting discriminator.
AFC was applied back to the oscillator, which kept it locked to the received signal.
The problem was using a bog-standard trimmer for the tuning. It was difficult to lock on to a station, and once there, it suffered from hand-capacity affects.
Llew
Granted I was in a bit of a 'dead spot' for FM reception (the local fill-in transmitter was situated on a gasometer the other side of town) so pretty poor for a receiver with a whip aerial.
It was a superhet design with three 120kHz IF RC coupled stages, clipped to produce square waves fed to a pulse-counting discriminator.
AFC was applied back to the oscillator, which kept it locked to the received signal.
The problem was using a bog-standard trimmer for the tuning. It was difficult to lock on to a station, and once there, it suffered from hand-capacity affects.
Llew
