Hi Frank
Thanks for the suggestions but these are case style 316-01 (more like
the MRF317 transistors), working at 28Vdc (although the PSU can be
adjusted up to 32Vdc !? ). I do have all of the Databooks from Moto
since late 70's until even after the name turn to "ON semic" (at
first, now at Macom & Freescale) and have tried to find similarity to
RF MOSFETs for them, without any luck! The original HARRIS transmitter
circuit schematic has them as MOSFETs, but I'm a bit sceptical about
them, as the topology, connections and the circuit itself, seems to
have been designed for common RF transistors... ie no +Vg bias
circuit, just a 10 Ohm grounded resistor from the gates! Probably
class C circuit, but I can't remember any Moto's MOSFET having that
case style (316-01 6lead flange planar)! Thought to ask here as there
was times that an SRF to MRF chart published periodically from Moto,
and maybe someone still have them to give a look...
I might try to put the MRF317 ! instead of some MOSFETs as the RF
output power levels, PSU and the onboard broadband transmittion line
input/output matching section looks quite similar (if not say as
exactly same) with those used with the MRF317s!
However thanks everyone replied to my quote...
Regards
Sotiris