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> Klystron Tube, Need Help
The Observer
Posted: June 30, 2010 12:56 am
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I got a 2K56 klystron tube from Antique Electronic Supply, and need pinouts for this tube. I need this tube to finish my last big project and don't have long.
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tekwiz
Posted: June 30, 2010 01:04 am
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The Observer
Posted: June 30, 2010 01:09 am
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Thanks, and if anyone knows of a circuit to run this tube it will also be helpful. Going to get something to eat, I'll be back in 1-2 hours.
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tekwiz
Posted: June 30, 2010 01:23 am
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All you have to do, AFAIK, is supply the tube with the correct voltages.


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Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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CWB
Posted: June 30, 2010 03:29 am
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the frequency stability is not so good ... you will have to ensure that the tube runs in a constant temp environment .
everything has to be mechanically sound .


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The Observer
Posted: June 30, 2010 03:55 am
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Ok, I'm back. It only needs to be stable for 5 seconds, after that the device will overload. Anyways, a constant temp isn't hard considering everything else in the device has to have a constant temp environment.
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tekwiz
Posted: June 30, 2010 05:10 pm
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The thing with klystrons is that being tubes, they only stabilize after operating for some time, as all the internal elements must reach thermal equilibrium to stabilize the frequency. The instability is due in large part to physical size changes in the resonating elements within the tube as their temperature rises during operation.

You might be able to get away with operating the tube long enough to stabilize, then removing the B+ for just long enough to set up the rest of the experiment.


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Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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The Observer
Posted: June 30, 2010 11:03 pm
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I'll put the rest on a timer. There are a lot of tubes in the system. Most semiconductor devices would be fried by the initial pulse. All semiconductors in the device are in a faraday cage.
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CWB
Posted: July 01, 2010 03:14 am
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a problem you will have with (say) running the tube at a given output in order to stabilize the Fo is when you raise the voltage to get more output (or even it's recommended Po) than the tube is designed for ...
the freq is going to be all over the place like a fart on a griddle .
these tubes were usually used in circuits that had decently regulated voltages .


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The Observer
Posted: July 01, 2010 04:09 am
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Would one of those old radioactive gas filled voltage regulator tubes work?
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CWB
Posted: July 01, 2010 11:55 am
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like the 0Z/0Bx reg tubes ?
it depends on the current they are rated for , how much voltage "swing" is present and the load current .
they are normally used as a "shunt regulator" .
a zener diode would work in their stead .

ps ... not all those regulator tubes had a tiny amount of radioactive gas in them .


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The Observer
Posted: July 01, 2010 07:15 pm
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The electronics store in Kansas has a box of regulator tubes no one wants, some of them are radioactive. No one really likes them, I live in more of a solid state town. sad.gif
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tekwiz
Posted: July 01, 2010 07:23 pm
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QUOTE (The Observer @ July 01, 2010 10:15 am)
The electronics store in Kansas has a box of regulator tubes no one wants, some of them are radioactive. No one really likes them, I live in more of a solid state town. sad.gif

Fer goshsakes, don't tell Jo0ngle!! laugh.gif

BTW: Buy them up cheap, then sell then one at a time on eBay. There could be quite a bit of profit there.

You need any medium power transmitting tubes? I have a few 813s & 6146s galore. I also have half a dozen mercury rectifier tubes...866s. Ceramic surface mount sockets for them, too.


--------------------
Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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The Observer
Posted: July 01, 2010 07:46 pm
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Probly a good idea. That's the advantage of living in a really small town, no one buys anything like that, so they just sit in the back collecting dust for 50 years.
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tekwiz
Posted: July 01, 2010 07:49 pm
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QUOTE (The Observer @ July 01, 2010 10:46 am)
Probly a good idea. That's the advantage of living in a really small town, no one buys anything like that, so they just sit in the back collecting dust for 50 years.

If you are lucky enough to even have an electronics shop in the town in the first place. My workshop is the closest thing to that in my town. The nearest decent shop is 200 miles & a 2 hour ferry ride away. sad.gif


--------------------
Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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The Observer
Posted: July 01, 2010 08:13 pm
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That sucks!!!!! sad.gif
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tekwiz
Posted: July 01, 2010 08:17 pm
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Thank goodness for online shopping!! thumbsup.gif


--------------------
Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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The Observer
Posted: July 01, 2010 08:23 pm
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Yeah, unfortuatly, it causes a lot of electronics stores to go out of business (not as bad as rat shack though). But you can get much more online.
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tekwiz
Posted: July 01, 2010 08:46 pm
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I don't think it's so much the online ordering that's putting electronix stores out of business, as it is the dwindling market.
40 years ago, electronic hobbiests were everywhere. Now they are few & far between. Current trends toward maximum miniaturization only speed the loss, as components become harder & harder to work with without precision machinery. If it weren't for online shopping, there would likely be no electronix parts stores at all.


--------------------
Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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The Observer
Posted: July 01, 2010 08:51 pm
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True beer.gif
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The Observer
Posted: July 01, 2010 08:58 pm
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QUOTE (tekwiz @ July 01, 2010 12:23 pm)
QUOTE (The Observer @ July 01, 2010 10:15 am)
The electronics store in Kansas has a box of regulator tubes no one wants, some of them are radioactive. No one really likes them, I live in more of a solid state town. sad.gif

Fer goshsakes, don't tell Jo0ngle!! laugh.gif

BTW: Buy them up cheap, then sell then one at a time on eBay. There could be quite a bit of profit there.

You need any medium power transmitting tubes? I have a few 813s & 6146s galore. I also have half a dozen mercury rectifier tubes...866s. Ceramic surface mount sockets for them, too.

those transmitting tubes are nice
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The Observer
Posted: July 01, 2010 09:10 pm
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And the rectifiers
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tekwiz
Posted: July 01, 2010 09:13 pm
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They are available for sale or trade if you are interested. The rectifiers are useless to me, & my current tube projects require bigger tubes than the ones I mentioned.

Like this one, for example:

user posted image



--------------------
Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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The Observer
Posted: July 01, 2010 09:18 pm
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I might get one or two.
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CWB
Posted: July 02, 2010 03:03 am
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hmmm ...
a set of 6146's in a PP audio amp .


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