On 21 Mar 2017 10:30 AM, "Trent Trent" <vk7hrs@...> wrote:
Irf530 would be better HF power and cheaper than the rd16 but a rf16vhf would b nice
On 21 Mar 2017 4:27 AM, "Jerry Gaffke via Groups.Io" <jgaffke=[email protected]> wrote:
Easy enough to twist the gate and drain leads on the RD16HHF1 such that they fit into a board drilled out for the IRF510.? Maybe put a bit of heat shrink on them to ensure they don't touch where they cross over.? Allison reports the IRF510 works as well as the RD16* parts at HF through 50mhz, ?primary reasons to move to the RD16HHF1 is heat: ?avoids need for mica insulators at the heatsink, and gives better heat transfer from die to package tab.? Otherwise the IRF510 is an excellent choice for a minimum cost rig.? Good luck with hacking the uBitx PA to work smoothly from 160 through 2 meters, I'm fine with a good solid simple easy cheap 80/40/20 SSB/CW rig.
Jerry, KE7ER
On Mon, Mar 20, 2017 at 08:24 am, Lawrence Galea wrote:
I suggest that when you do the pcb design for the ¦ÌBITX make pads for the PA so that people can either use the IRF510 or whatever you are going to finally use and an RD16HHF1 or RD16HVF1.
This would allow people to use the much sturdier RD if they want to and use only 12v for the supply and more so if they are going to use it up to 30MHz or even higher, perhaps on 50MHz and 70MHz with the RD higher efficiency.
The RD16HHF1 works well in the Ukranian transverter at 70MHz.
So perhaps you will remember these points and why not, 144MHz perhaps?
