HI FROM TIM...PICKED UP A DX60A AND VF1 VFO AT LOCAL HAMFEST...THE THING LIGHTS UP,I'VE CHANGED ALL THE TUBES,AND WHEN I THROW IT INTO AM TX,THE PLATE METER READS 80MILS,BUT I HAVE MINIMAL RF.PROBABLY ABOUT 50-100mw. VERY LITTLE MOVEMENT ON WATT METER,NO AUDIO OUTPUT AS WELL...GRID READS NOTHING AT ALL. PREVIOUS OWNER HAD A 1/4 INCH JACK INSTALLED IN THE BACK,IN LINE WITH THE OUTPUT VOLTAGE TO PIN 8 OF THE ACC JACK.ASIDE FROM THIS OBVIOUS MOD,ALL APPEARS CORRECT..NO EXTRA HOLES DRILLED,TUBES ADDED,ETC. WHEN I PUT A 80 METER ROCK IN IT,I CAN ONLY KEY THE AM TRANSMIT WITH A CW KEY IN THE KEY JACK...ANY IDEAS? I'VE LOOKED AT THE PICTORIALS I HAVE,AS WELL AS THE WIRING...DONT SEE ANT FAULTS...ANY HELP ON THIS WOULD BE GREAT...73...TIM...SK...
Hi Tim,
The first thing I would do, is "forget" about the AM function for now.
Just think about the rig as a straight CW rig, and as such, why are
you not getting grid drive?
You should be able to get at least 2 to 3 ma of grid drive indicating
the oscillator is working,--if not why not?
You mentioned using a VFO,--forget the VFO for now, es install an
80 or 40 meter crystal es see if you get proper drive.
If you do,--you probably have a VFO problem, if not check the oscillator
with a scope es see if its working, if it is--check the buffer stage.
You have to find out why ur not gettin "basic grid drive" in the CW
mode, es get the rig working as a CW xmtr, and then worry about
the AM function.
Hope this "helps" as a starter.
73`s Rene, K1MVP :neutral: