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Messages - JimIO

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481
How many lawyers and accountants does it take to do good radio?

482
Pirate Radio History / Re: Radio Newyork International (RNI)
« on: February 23, 2018, 0220 UTC »
There's JohnLightning.Com too  :-*

483
General Radio Discussion / Re: Get those long wave antennas ready
« on: February 13, 2018, 2027 UTC »
The only good thing about cable is free cable WIFI 8)

484
The RF Workbench / Re: 3kw pep solid state amp 1.8-54 mhz
« on: February 12, 2018, 2355 UTC »
Speaking of... Does anyone know how "compatible side band" (CHU time) is generated?
I have looked and can't find it explained anywhere. I'm guessing it starts out as low level AM and then one side band and some of the carrier if filtered out then it is linear amplified.
 

486
The RF Workbench / Re: 3kw pep solid state amp 1.8-54 mhz
« on: February 12, 2018, 1924 UTC »
I heard a guy on the 75M AM window saying he did that. 2 Cree SIC FETS, no power transformer. Just full wave rectify 220 with 2 diodes. Said he had a web page and gave his call but I never found it.

487
The RF Workbench / Re: Amplifier Topologies and Classes
« on: February 12, 2018, 1803 UTC »
Good post Str. Generator is the word I should have used.
Have been looking at 13.56 Mhz half bridge D/E on the web but non I have found so far give details on how to make a simple high side driver circuit.

488
The RF Workbench / Re: 3kw pep solid state amp 1.8-54 mhz
« on: February 12, 2018, 1749 UTC »
I don't think too many pirates would be interested in something that needs more than a (four words "Made in the USA") NEMA 5-15P to IEC C13 power cord. ;D

489
The RF Workbench / Amplifier Topologies and Classes
« on: February 11, 2018, 2017 UTC »
Say I wanted to build an amp for 4 to 7 Mhz no tuning. Should I choose Single Ended or Push Pull. I know what and why for audio.

490
The RF Workbench / Re: Xtal Replacement
« on: February 11, 2018, 1921 UTC »
Rants are OK and we need another thread. How about Amplifier Topologies?

LTC6992, thats a lot of stuff in a 6 pin pkg. but it won't plug in a breadboard and seems more like something used in a digital app.

I did buy one of those kits mainly for the PCB, now i'm waiting on some SMD soldering stuff so I can Xperiment.

Back to "Xtal Replacement" I have some Arduino UNO R3's and a AD9833 and AD9850 module and just got some prototype boards. Anybody here done anything like that?
I know there's stuff on Github.

491
The RF Workbench / Re: Xtal Replacement
« on: February 10, 2018, 1935 UTC »
TL494 I.C. is a good start for a series PWM. 10/$ or so on ebay.
And why class E unless you want to run on batteries? There are a few HF amp kits too If you can solder SMD.

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