View Single Post
Old 29th Jan 2023, 7:32 pm   #12
murphyv310
Dekatron
 
murphyv310's Avatar
 
Join Date: Sep 2006
Location: Kilmarnock, Ayrshire, UK.
Posts: 5,422
Default Re: M57713 144-148mHz module

Hi.
The driver transistor gives 250mw at 50ohms and I've directly connected it to the output connection that went to the PA module. Had some reasonable reports on FM & SSB using the radio that way. Adding a 2SC1972 as a PA and biassing it suitably you get around 3 Watts on SSB plenty enough to drive a 30watt Linear amp, even with 3 Watts with a decent antenna I get up to 20 miles on FM.
__________________
Cheers,
Trevor.
MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member
murphyv310 is offline