Congratulations, very intersting design! I have three questions: 1. With the new impedance matching output, what is the power amplifier bandwidth? 2. What was the reason to route back (on the PCB) the output of the 600W power amplifier, to just about 1 cm (0.4 inch) away from the input? 3. Is the long (90 deg. bent) RF output trace 50 ohms impedance? I don't know what PCB substrate you are using and if use ground underneath, but if is about the standard FR4, thickness 1.5 mm (59 mil), with ground, the 50 ohms microstrip trace should be about 2.7mm wide. Compared to the size of the MRF300 package, this microstrip line is much wider. tnx

BAD PWB design/ layout. Insufficient copper around hot components/ crowded too closely.

The Professor is Back !! Missed You ! Looking forward to future video's and electronic offerings.

Thanks for sharing this updated version, excellent point about the loss via output transformer. I would've thought LDMOS was gonna take over the RF amplifier world when i first seen the capabilities years ago but so far just a slow progress, maybe the higher voltage is the reason? Anyway nice 👍 glad to see people with knowledge still experimenting

Glad to see your back! I hope this finds you well and in good spirits!

Good to see you, been a minute.

It is amazing to hear someone putting low pass filtering on amplifiers. Is the filtering on both input and output? Thank you

Hello, What type of material was used for the L-Matching Network? That is an amazing setup, it would be great for my HOA. Thank you

Nice Video Brian. Looks Great and sounds great!!

Very nice worth trying ,all that wind in the truck yep.thanks

Looks good

Cool! Glad to see it’s a success! Neil H.

Hey it's your favorite customer! Is this up on your site for sale yet? I did not see it on site? Yes it is "Two way radio and that is what it is all about"!! I have asked about electronic switching in the past and people always poo-poo'ed it! I looked on ebay as well! Can't wait to try one!

Sir where did you get that slab of heat sink? I like it.

Ive heard these are not true RF devices but more suited for power supplies and are being used for RF applications anyway.

1:1 ratio is NO gain has to be over driven just to work.

Could you put a kit together for me?

Looks good. whats the input power require for 650 watt and secondly the tuned ckt. module - is it broadband or meant for any particular band

What's the Voltage requirement

Now you need to make a 4 transistor version to about 1200w to compete with the bigger ones with the single 400 dollar chips in them.

Saying a long loud "AUDIO" is a much better indication of real world talking power. Some of my elmers would really give me a lecture about whistling to check audio and power. Beautyful build BTW.!

Dude we need to ask you this man but our group is walking a fine line. TAFT doesn't bash shops or builders because we are shops and we have to deal with the builders. It's business. These Palomar transistors seem like crap to some of us and a godsend to others. Shops make a nice profit from maxmods and ERF2030+ Mark Sherman of Fine Scam CB swears that these transistors are the best ever including the max mod. Because they supposedly "fix" the radios flaws. Two other guys did videos going back 2-3 years that said these transistors and the max mod were a scam. They got attacked by Mark Sherman and other shops relentlessly. Both of those guys took their videos down (and we have copies still) and the rumor is that Palomar threatened to sue both of them because they did tests like you did and the transistors didn't exactly live up to the claims. Palomar ever try to sue you? Looks like you independently verified what they said several years ago so now I really do believe these other guys that said these transistors were just relabeled junk.

Do these amplifiers work on other bands like 20, 40, and 80 meter bands?

I still have your DX150 KIT...

Your amplifiers have clean output - practically free of harmonics... I wish I knew where to buy the metal chassis.

nice antenna. cb skip = fun

what is the best fet to use in a 10 meters amplifier?

New to the base station stuff only used plug and play mobile equipment. Love your video and your build is absolutely beautiful!!! Can you explain the matching network part and maybe a build spec? I'd love to try and build something similar. Last question - if the antenna were mounted up higher wouldn't you be better off? Thanks; Shawn Seattle WA

how is swr?

Any one know if this lil ' issue still exists on this transistor I'm gone upgrade my Radio with 5 of this ( probably they update them) Question to a professional person... Thanks and advance... 73s

"The CB crowd" Hey....I represent that remark 😂

More snake oil, isn’t this just another rebranded device? But what about the shop that puts them in every radio and claims he’s the only one in the world that knows how to tune a radio. I saw it on the internet so it must be true....

Nice. I need something like that so I don't have a big intrusive tower in my neighborhood. Someday I'd like to set up a base at my house

Thanks for an Engineer's perspective. Was looking for a 7530 replacement. Apparently Palomar and their 9530s are consistent with today's business model: lie, cheat and steal until caught bare butt naked; then sic your army of thieving lawyers onto the opposition and wear 'em down in court. Cant even get a King/McD burger with real beef anymore. Its either meme or pink slime filled.

Would like to see you work with the newer Sic Fets and GaN Fets. 👍 I heard they love volts as well.

Nice to see you back on youtube uploading. I hope your move went well and you are getting settled in!