Home |
Search |
Today's Posts |
|
Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
Reply |
|
|
LinkBack | Thread Tools | Display Modes |
#41
Posted to rec.crafts.metalworking
|
|||
|
|||
3 phase
TWT would do it or a pyramid. I have a few K's in my shop -
I destroyed all of the magnetrons I got. The mechanical parts are secret. So they were shredded. They were also a little hot. My students were design engineers who had access to scrap stuff at the aircraft plants. That was a few years ago - all of the 70's. Martin Martin H. Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net "Our Republic and the Press will Rise or Fall Together": Joseph Pulitzer TSRA: Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal. NRA Second Amendment Task Force Charter Charter Founder IHMSA and NRA Metallic Silhouette maker & member. http://lufkinced.com/ On 5/29/2010 12:55 AM, Michael A. Terrell wrote: Ignoramus26467 wrote: big enough to build a nuclear bomb trigger. Wrong kind of tube. You need a Krytron, which is a controlled device. You are not allowed to export them. They were made by EG&G A Thyratron is much too slow to do the job. |
#42
Posted to rec.crafts.metalworking
|
|||
|
|||
3 phase
mine - glass shell - metal base. The plate connection was on top and
in metal naturally. 4 pins - two for filaments and two for the cathode. Martin Martin H. Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net "Our Republic and the Press will Rise or Fall Together": Joseph Pulitzer TSRA: Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal. NRA Second Amendment Task Force Charter Charter Founder IHMSA and NRA Metallic Silhouette maker & member. http://lufkinced.com/ On 5/29/2010 12:52 AM, Michael A. Terrell wrote: Gunner Asch wrote: On Fri, 28 May 2010 03:37:46 -0400, "Michael A. Terrell" wrote: I've used tubes with dual, 1.5 VAC, 1000A filaments. The two filaments had to be balanced to less than 1/100 volt difference to prevent hum in the audio& video outputs. GACK!!!!! Good lord...one could cook a 5 course meal over those. Metal or glass shell? All metal shell with high voltage, high temperature ceramic and glass insulation around the terminals. They were the custom designed 25 KW water cooled UHF power tetrodes video output tubes for the TTU-25B. That was RCA's first 'High power' UHF TV transmitter. A similar 12.5 KW tube was used for the Aural section of that transmitter. It was designed & built in the early '50s. That's 37.5 KW of waste heat that required a water chiller large enough to cool a decent sized office complex. The three plate transformers were huge, too. It was all I could do to move them with a heavy duty appliance hand truck. Then there was the 30 KV armored HV cable that ran from each transformer to the Thyratron cabinet. That transmitter filled nine, four foot square aluminum cabinets. It took three trips with a 28 foot U-haul truck to move all that weight. I had to use an oxyacetylene torch to solder the four inch copper pipes for the cooling system. It took 400 A 480 V three phase just to power the transmitter. Then there was the control room, and the studio lighting. |
#43
Posted to rec.crafts.metalworking
|
|||
|
|||
3 phase
Someone wrote:
"Wrong kind of tube. You need a Krytron, which is a controlled device. You are not allowed to export them. They were made by EG&G A Thyratron is much too slow to do the job." Krytron (sp) ? Are you sure we're not talking about "Klystrons" ? In the early days of Radar, klystrons were used as LOs in radar sets. As I understand it, the power capability of klystrons has grown to the extent they have pretty much replaced the magnetron in modern Radar. EG&G, among other things, was the instrumentation contractor at the Mercury, NV underground testing facility. Bob (CMIIW) Swinney |
#44
Posted to rec.crafts.metalworking
|
|||
|
|||
3 phase
On May 30, 10:55*am, "Robert Swinney" wrote:
Krytron (sp) ? Bob (CMIIW) Swinney That is the right spelling. Another similar device is the Sprytron. Both are used in Exploding Bridgewire ( EBW ) systems. Dan |
#45
Posted to rec.crafts.metalworking
|
|||
|
|||
3 phase
Robert Swinney wrote: Someone wrote: "Wrong kind of tube. You need a Krytron, which is a controlled device. You are not allowed to export them. They were made by EG&G A Thyratron is much too slow to do the job." Krytron (sp) ? Are you sure we're not talking about "Klystrons" ? In the early days of Radar, klystrons were used as LOs in radar sets. As I understand it, the power capability of klystrons has grown to the extent they have pretty much replaced the magnetron in modern Radar. EG&G, among other things, was the instrumentation contractor at the Mercury, NV underground testing facility. Ask on news:sci.electronics.design if you don't believe me. A Krytron is an ultra fast electronic switch that allows a very high current to be switched. It is used as a trigger. There isn't a lot of published data, since it was designed for a specific use. A Klystron is used as an oscillator or amplifier. I've worked with 65 KW Klystrons. Big, heavy and use lots of distilled water in the cooling systems. -- Anyone wanting to run for any political office in the US should have to have a DD214, and a honorable discharge. |
#46
Posted to rec.crafts.metalworking
|
|||
|
|||
3 phase
On 2010-05-30, Robert Swinney wrote:
Someone wrote: "Wrong kind of tube. You need a Krytron, which is a controlled device. You are not allowed to export them. They were made by EG&G A Thyratron is much too slow to do the job." Krytron (sp) ? Are you sure we're not talking about "Klystrons" ? *I'm* sure at least. While I was working for an Army R&D lab, I had to fix a pulsed laser which used one to drive the trigger coil on the flashlamp. The Krytron was about the size of a small acorn, with all the leads coming out a recess in one end (at least one with a silicone rubber insulation on the wire). It also had a radiation hazard symbol on it, because it got its speed from already being partially ionized by the radiation. O.K. Here it is: http://en.wikipedia.org/wiki/Krytron except that the photo is from before the radiation sticker was applied, and it is missing the silicone rubber insulation on one of the wires. At the time, I just knew that they were controlled items, and not why. I later (during the export furor) discovered that use for them. (Of course, I never had the other components needed to make the device, so it did not matter. :-) In the early days of Radar, klystrons were used as LOs in radar sets. As I understand it, the power capability of klystrons has grown to the extent they have pretty much replaced the magnetron in modern Radar. But a very different thing. EG&G, among other things, was the instrumentation contractor at the Mercury, NV underground testing facility. EG&G (formed by Dr. Edgerton, with Germshausen & Greer The source of the firm name) also made (and started with) Xenon flash lamps, and made at least one setup large enough to take a flash photo of the city of Boston from the air. :-) Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Rotary phase converter versus trying to run a VMC straight from single phase | Metalworking | |||
Rotary phase converter versus trying to run a VMC straight from single phase | Metalworking | |||
Single Phase Backup Generator to Three Phase Mains Supply? | UK diy | |||
profit-motive question: single phase adapter for 3-phase motor drives | Metalworking | |||
3-phase used for 1-phase (split-phase) power | Home Repair |