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They pop up on Aliexpress for example (

Hopefully Fanny and Bob brought a bottle of spirits

Kind-of, yes! Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa

A great thing about the LT3045 is that you can parallel them for higher current and even lower noise (with careful PCB layout). John Bennett AE0AM

Yep. I can get then for the same price here but I must order them for future delivery… Yeah. Make some small boards and… Fanny and Bob are both in the house! Dr. William J. Schmidt -

and in 1K lots they cost $3.37 each https://www.analog.com/en/products/lt3045.html 20 mins with a PCB Design package and Fannys your Aunt !

Yep that’s the ticket! I had in the back of my brain designing a board identical to that little guy… that would simply replace the regulator and there it is! I think I could do it for less

Great idea - a French DIY audio company offers these for sale (not

Yeah. That’s where the “DUH” came from… Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton,

I think that depends on the circumstances but yes the low noise parts make a much bigger difference. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner

Hi Bill Not sure how true this is but apparently LM317 style regulators are better than the LM7805's.?? Not as good as a dedicated low noise part though for sure. glenn vk3ep

These are great, Oliver. If it's okay with you, could you send me the hi-rez versions of the graphs? Al and I would like to include them in the book. BTW, I tweaked the toroids in the LPF board to

All: The final version of the code is about to be released by Al and I and we are turning it over to Oliver to care for it in the future. There are coding style differences that some people will

It's different for every different amp design... needs to be tested, BUT IN GENERAL you want enough headroom so that you never reach saturation of the devices... that means PTP power divided by

*** Does it have to be 1/4? How much improvement would 1/2 of available output give you? I recently saw a new LDMOS device that's rated for 2.5kW CW output. I think it runs off 75V. I was

Easy to sacrifice gain to get negative feedback (and better linearity) when power isn't an issue and there is excess gain available (e.g. low power stages) Much more expensive and risky to add high

More mumbling about APP… operating the amp at less than 25% of its average available output gives better IMD. DUH. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

Well this is a load of crap. It’s a good way to cover the problems up… that’s all. Any RF engineer will tell you… stop it early in the design… not at the tailpipe. Dr. William J.

There’s that “Class-A” thing again… Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton,

fyi Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand