Hey Arv… Oh the binary approach does work. Eventually. My comment was more along the lines that it’s the most inefficient way to get to a match. I did a lot of research around algorithms used to solve

This is what the old Harris RF-601 tuner did… Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Vi

I agree with you jack. I’m an innovating entrepreneur too… on the hardware side though (I can’t write code to save my life)… but there is a fine dance here that I’ve fallen victim to as well. When I d

You don’t have to guess here… All amplifiers basis their class of operation have an efficiency that, along with the power input, determines how “HOT” things get. Roughly a 200 watt input amplifier tha

This is a good discussion. The emissivity coefficient (as a semi “black body” radiator) for just plain aluminum is 0-0.2, anodized aluminum is about 0.5, and painted black is 0.9-0.96 but, of course,

To put this into perspective again, according to the Boltzmann equations, the heatsink would literally have to "glow" (emit in the light visible range) in order for radiant heat transport to become as

This works too… Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton – J68HZ Soufri

I use these things in my J6 6 & 2 meter beacons… they work flawlessly. Put out about 3 watts… perfect for VHF DX, or driving something larger if needed. There are many similar models… https://www.ebay

CW is technically allowable anywhere in (for your example) the 20 meter band. Plenty of band width contest or not. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Op

There is always a risk of hitting this junk in a plane. As a pilot I hate dodging objects while flying… but it is what it is. Technically if it goes that high you should file papers with the FAA (in t

There were thousands of T-60’s and like design radios on the air in the 60’s and 70’s… and now you are worried about the filtering??? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ

Well I actually teach a class in RF design at the University. To bring this to field simplicity… you should measure the impedance of the antenna while putting down radials. When the impedance stops ch

No harmonic filters? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Moderator – North American QRO Group at Groups.IO. email: bill@wjschmidt.com

Will it be bolted to the table? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Pito

Hydrogen burns without color and that is the problem with it under pressure. It will self ignite in the presence of hydrocarbons (eg something as simple as grease) and you wont even know its burning u

Ph.D in Chemical Engineering with 35 years experience in refining. Nope. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, I

Hydrocrackers, a unit op used for breaking long chain hydrocarbons into kero and gaso range material use hydrogen at 1,500 pounds. Reformers which simply rearrange molecules product same carbon number

Its catalyzed by steel. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton - J68H

Agreed. A surplus weather or military balloon and helium is more than sufficient. Party stores carry the helium. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Oper

Well invariably H2 is carried in steel pipes in commercial operations. This is what is problematic. On top of that, there is a concept called Hydrogen embrittlement in steel where H2 causes steel to c