View Single Post
Old 28th Sep 2018, 12:33 pm   #34
Ian - G4JQT
Octode
 
Ian - G4JQT's Avatar
 
Join Date: Jun 2004
Location: Reading/Fakenham, UK.
Posts: 1,323
Default Re: Building the 'Minimod' AM modulator-questions!

@Mike: Layout looks fine. Is that a mod-level pot you've added? The fact that the FMing didn't sound any worse than an real station is promising. Swapping inductors over may help pin it down. The fact the radio only tunes in 9 kHz steps shouldn't really be a problem, unless the station drifts a lot which means you can't re-tune sightly, but that shouldn't be necessary. Most modern radios have really tight IF selectivity, so that has an effect if the station is not within about 1 kHz of a channel. BTW, I also have that counter.

@Kellys: What inductors did you use? Just curious as they don't look like the 90uF ones from Spectrum Comms.

Ian
Ian - G4JQT is offline