On Mon, Apr 22, 2024 at 03:30 AM, tuneupmagic (null) wrote:
Points well taken, David, AF6HO.? Lol.. Forget about the LA-1K, I use my Elecraft KX2 as a QRP exciter to operate on 5346.5 kHz USB with my Elecraft KPA1500 set to Band 5; staying well within the permissible 100W PEP ERP limit.? Oh btw, the integrated ATU of the KPA1500 even provides VSWR matching for my experimental 60M antenna, last year.
That's nice, but the LA-1K design doesn't lend itself to work with low power radios, as it requires more than QRP excitement to meet it's threshold.? I ran it at lower powers for some antenna configurations, but even at 5W drive you'd violate the 100W limit. I think 5W in ends up with ~150W+ out, and because of that you also would have very limited control to get it close to 200W without overrunning.? Also the LDMOS control voltage is fixed (Vd) at 50V, so you end up just wasting a bunch of input power, turned to heat, at the same time.? It's just not designed for this.
In terms of you not seeing any value of my request asking Palstar to resolve the issues, I'd suggest you contact Mark Ward?(Palstar's technician) directly so Mr. Ward can share with you why he thought my request's a valid one.? I'm just guessing now.. Palstar might have some challenges hiring and keeping talented STEM personnel after the COVID-19 pandemic to address various LA-1K issues in a timely manner.
I'll pass bugging those guys.? I do appreciate Mark, he's a great guy, he's intercepted many grouchy responses from Paul and turned them into positive outcomes.
In terms of you saying "I don't think vehicle makers should own responsible driving" I sure hope Mercedes' "DRIVE PILOT" operating under their stated conditions/environments would own responsible driving as a certified SAE Level 3 system for the U.S. market; please go to for details provided by said vehicle maker.
Eh? Off topic? I wasn't talking about self driving =)
73s
?
--------------
David
AF6HO
