Correction, I should have fact-checked myself. Jim is right in that under vapor cooling, water *does* approach 100 degs. C, then converts to steam vapor, then cools through the condenser where it giv
cooling works on the premise that the water is brought up to a boil. And thats with normal sea level pressure. Put the system loop under pressure, and the boiling point will rise by a bunch. Will a
1st, they don't use water. As I said in the post, Water, Vapor phase cooling is too hot for SS amps/circuits. 100C will work, but the life of the device would be drastically shortened. Vapor phase co
Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Thu, 16 Feb 2017 00:15:55 -0500
Wouldn't Amps, or Ham Amps be a better reflector for this thread? Were talking distilled water here. If it's conductive enough to present a danger, it's long past time for a replacement. When I was a
Wouldn't Amps, or Ham Amps be a better reflector for this thread? Were talking distilled water here. If it's conductive enough to present a danger, it's long past time for a replacement. When I was a
FYI: I'm afraid I have to disagree on the statement below about distilled water being conductive. In industrial experiments in the use of distilled water, I found it to be very non-conductive. If I r
Continuing this thread, we used deionized/deoxygenated water for our RF power tubes at the accelerator plant. I designed the anode cooling tubing to have no more than 500 uA of leakage current per ho
FYI: I'm afraid I have to disagree on the statement below about distilled water being conductive. In industrial experiments in the use of distilled water, I found it to be very non-conductive. If I r
Might run another experiment to see how conductive initially distilled water becomes after spraying it onto the inside of a cabinet, and on some circuit boards. Collect the drainage in a pan, which n
Good Point! The Mineral oil or Transformer oil, I wonder what happens to that in varying amounts of contamination? Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.id
Anything that comes in contact with distilled water is a potential contaminate, including: air, tubing material, metalized heat transfer condensers, couplers, even copper plating on the inside of a t
Hi all, It's my humble opinion that this whole thread on how to cool high power solid state amplifiers, using water (or evaporation, oil, freon, whatever) is on the wrong track. Instead of using high
Not sure what you are disagreeing with. Distilled water presents a high resistance when first used, BUT, distilled and de-ionized water is ion hungry, or rephrased, quite corrosive. It will take the
A lot of klystrons for UHF TV used ion-exchangers ( we called them scrubbers ) to help remove the brass / copper / stainless / whatever ions were present. Don W4DNR Not sure what you are disagreeing
Hi all, It's my humble opinion that this whole thread on how to cool high power solid state amplifiers, using water (or evaporation, oil, freon, whatever) is on the wrong track. Instead of using high
Not sure what you are disagreeing with. Distilled water presents a high resistance when first used, BUT, distilled and de-ionized water is ion hungry, or rephrased, quite corrosive. It will take the
50 ohms = 1414 V peak. Those type of dummy loads are not an issue. Available up to 200 kw. Recently purchased a NOS 5KW Altronic Omegaline load. Connect a garden hose, crack open a faucet, set reaso
water..... without having to go through the boiling process. De-ionized water IS NOT pure water, the de-ionizing process does NOT remove silicates that are abundant is some parts of the world, very
A properly designed SS amp running Class A, AB1, AB2, B, and C uses about the same power and class as a tube amp may require less cooling than the tube amp as there is no heat from a filament. Many t
Jim, Only a few do, on short wave, most of them just outside ham bands. Most broadcasters use AM or FM, of course. I do take your point. High efficiency amplification is trivially simple on FM, and o