@4:14 The goal of gate resistors has nothing to do with SWR. They work as parasitic suppressors. On high bandwidth devices operated at lower frequencies (most power LDMOS have quite high gain even above the GHz), these gate resistors along with gate capacitance create a LPF, decrease the input Q and lower the response/gain of the LDMOS above operational frequencies preventing destructive oscillations . Again, these LDMOS devices by themselves have a huge open loop gain even at GHz frequencies where negative feedback could easily become positive and the amp could potentially become a power oscillator if no preventive measures are taken when used at such low frequencies. Gate resistors are a cheap but effective safeguard on such low frequency applications. A similar technique can be seen in power tube amps, where parasitic suppressors are placed in series with the plates.
Hey sharky I was thinking when you moved I should have parked my camper at your new house and did all the interior work you needed done and traded work for work… BUT GETTING TIME AWAY FROM WORK TO WORK IS HARD .. hahaha make any sense ? I hope so cause I’m lost brother man.. lol hope you and the family had a great thanks giving and everyone is healthy doing great… Santa will be here before we know it … Kyle is in the right hands take care hope to hear ya out there in dx somtime brotha 73’s WOODCHUCK NY BACK QUIET . Ps sorry wasn’t yelling just big fingers little phone
Hello Sharky. My memory seems to be slipping lately but I’m pretty sure I spoke DX with you the other day. Would love to ask you a few questions. Looking forward to part 2. Slingshot from Stockton.
What’s the point of bulky transformer for matching when LC matching components could be also be used. In my opinion it’s much easier to design a matching network using these components?
Hello. I came across this channel in my search for information on how to set up a power amplifier for HF. This is some of the best and most informative content I've found on the subject. However, I was very surprised to hear discussions about using CB (27MHz) and 1000 watts. In Norway, where I live, we have a power limitation of about 12 watts SSB. What is the legal limit in the USA?
I just wondering what a box like that would cost, all I have ever ran is a 10 tube I think it's a phantom, and it said the same tubes in it for 20 years or more, I'm pushing 70 so I know nothing about the new boxes
