The
internet provides lots of circuits with the Ferranti TA7642. For example this simple design:
Note: contacts 1 and 3 on TA7642 / contacts 5 and 6 on LM386 swapped
What’s
possible with this small IC. How about
(V)LF reception or CW/SSB decoding ?
I found some time to solder the circuit above. To be honest, the results were rather dissapointing. Could receive 2 MW stations and in the evening 4. But there was no good separation of the stations (bad selectivity). I used an SMD version of the LM386. It will be hard to discover it on the photo below.
I found some time to solder the circuit above. To be honest, the results were rather dissapointing. Could receive 2 MW stations and in the evening 4. But there was no good separation of the stations (bad selectivity). I used an SMD version of the LM386. It will be hard to discover it on the photo below.
Impossible! That circuit does not fit in such a small blob ;-)
ReplyDeleteThe good old ZN414, aka MK484, YS414 and ... TA7642.
ReplyDeleteYes 'evergreens'. Cheap fun.
Deleteme too, handy, useful for a solar radio, but poor performer overall. john
ReplyDeleteBuen dia,ud deberia usar una configuracion tipo regenerativa,esto incrementará considerablemente la sensibilidad,y deberia tambien aumentsr el numero de espiras psra aumentsr el q del circuito.saludos
ReplyDelete