Would there be a clear advantage to replace them?
Il 21/ago/2018 23:09, "Timothy Fidler" <
engstr@...> ha scritto:
Simple answere is NO .? But there are advantages as per below.
1.The Pinning on RD devices is GSD with device flat on its back. ( that means inter alia the final transformer has be direct wired to the? Drain of the RD - if the wire will stretch.)
2. RD16HH needs slightly? more? measured bias current? on D-S? leg to stay linear.
3. RD16HH is near idiot proof wrt SWR up to 15V (see datasheet)? but above that you are near one third of its? max operating condition and you take the risk of losing them if the output is unterminated. THe qualification voltage for these devices is 12.5V and many homebuilt amps with a pair have provided 16W out,? linear at 14V supply.
4. RD16HH has Source ie zero volts thermal/elec bonded to the tab, so if you provide approp support,? you can rejig existing sink arrangement and have both devices direct mounted on a common massive finned heatsink with NO mica washers under the devices.? Obviously to do that,? you would need a carrier plate that the PCB stands on via hex nut stand off legs, and the heat sink is mounted off that carrier plate.?
