Anyone know what this is?? Strange tube/ bulb. - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 18th August 2004, 12:09 PM   #11
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
Maybe this info should have been included in the first place.

If you look at the first photo, you will see the dessignation in russian...the first 3 letters that is. I cant type those russian letters so youll have to look at the photo. after the 3 letters it says "-51". Does that help any?

The tube is brand new, one side is metallized for the sake of reflection (I believe), the other side is clear.

Cheers

Magura
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  Reply With Quote
Old 18th August 2004, 04:03 PM   #12
diyAudio Member
 
Join Date: Jun 2004
Location: Kaunas
One pin of this tube is connected to that metallic side and the other pin is not connected and just stays in the middle of the tube? If yes, then this tube is photo sensor - try to light at it and measure the voltage on the pins.
  Reply With Quote
Old 18th August 2004, 04:16 PM   #13
diyAudio Member
 
Sch3mat1c's Avatar
 
Join Date: Jan 2003
Location: Milwaukee, WI
Send a message via ICQ to Sch3mat1c Send a message via AIM to Sch3mat1c
Quote:
Originally posted by rcavictim
Does an ohm meter show any continuity between the end pins? My initial reaction is that this is a small short arc lamp which would show no continuity. If that is the case a rather specialized power supply is needed to light it. It seems very dark. Unless that is a special filter coating the bulb has long use on it.
Ah, another good suggestion.

Nothing too specialized, you could test with a neon sign transformer and see what it does. For full operation you may need a current-limited 800VAC (OCV) power supply capable of oh... 20-50 amperes.

Quote:
Xenon would glow whitish. Do not run for more than a couple of seconds.
Yes, interesting things happen when glass is in direct contact with pure plasma at 20,000°F+...

Quote:

I'd advise against "just plugging it into the 120 volt mains" in case it is a low voltage filament lamp. That will instantly ruin it.
True. Good reason to use a variac and maybe transformer.

Quote:

Do you collect interesting vacuum tubes as a hobby? I do.
I do, although I don't have a habit of seeking them out...

Tim
Attached Images
File Type: jpg raytheon rk-707b.jpg (7.1 KB, 76 views)
__________________
Seven Transistor Labs
Projects and Resources
  Reply With Quote
Old 20th August 2004, 03:37 AM   #14
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
Ive found out that its a photo sensor.

It gives 55mV at regular room light intensity.

Thanks everybody!!!

Magura
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  Reply With Quote
Old 20th August 2004, 05:49 AM   #15
diyAudio Member
 
rcavictim's Avatar
 
Join Date: Jun 2004
Location: Next to an open wormhole NW of Toronto
Default Valve/tube collecting

Quote:
Originally posted by Sch3mat1c



I do, although I don't have a habit of seeking them out...

Tim
Tim,

That Raytheon tube you showed looks like a waveguide mounted TR switch for microwave radar. I could not find it in TubeLore however. My second guess if that was wrong is a klystron for a laboratory microwave signal generator.

I collect interesting tubes and valves but probably as you, not by seeking them out. I just hold on to them as I acquire them and in all my years didn't throw many tubes away. Those that I did I am frightfully sorry for now. I used to have quite a collection of interesting small CRT's now long gone but my collection has come back in those a bit since my last move 7 years ago. I wouldn't consider myself a tube collector really. I have a bunch of the more interesting looking ones in a glass display case in my home as technological curiosities mostly. Vintage TV sets with round picture tubes....now for those I consider myself a collector! Much deliberate searching, travel and expense to purposefully drag a large quantity of those across the border and eventually home, although I haven't bought one in several years now due to having run out of space in which to display them.

Rob
__________________
On April 01,2012, my radioastronomy Project TARGET SETI search succeeded. The signal came via extradimensional subspace, not radio waves. I now get a lot of 'visitors'. I took my avatar pic of one friend watching me in my work yard from just 20 ft. away.
  Reply With Quote
Old 20th August 2004, 07:14 AM   #16
AuroraB is offline AuroraB  Norway
diyAudio Member
 
AuroraB's Avatar
 
Join Date: May 2001
Location: Norway, -north of the moral circle..
Magura...
those things had a special name for them...?? Haven't seen one for ages!
Was it Cadmium Sulphide for the active element?

Strange though, -- the heavy terminals somehow indicated a large current device....always somehting new to be learned.......!

EDIT:
Just googled up this one, - my internal memeory isn't that bad afterall

http://www.phanderson.com/printer/cadmium/cadmium.html
  Reply With Quote
Old 20th August 2004, 08:31 PM   #17
diyAudio Member
 
Sch3mat1c's Avatar
 
Join Date: Jan 2003
Location: Milwaukee, WI
Send a message via ICQ to Sch3mat1c Send a message via AIM to Sch3mat1c
Default Re: Valve/tube collecting

Quote:
Originally posted by rcavictim
That Raytheon tube you showed looks like a waveguide mounted TR switch for microwave radar. I could not find it in TubeLore however. My second guess if that was wrong is a klystron for a laboratory microwave signal generator.
Yep, klystron. I forget what frequency (1-2GHz?) but it's in the mW range. I think TDSL has something on it. ... Yep, two from the Valve Museum and one from WPS. 1.5-3.75GHz, 140mW max.

I've wondered if I could use it as an esoteric tetrode instead.

P.S. I've got a cute viewfinder CRT... 1" diagonal..

Tim
__________________
Seven Transistor Labs
Projects and Resources
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
strange tube gianis33 Tubes / Valves 19 26th January 2009 12:23 AM
strange tube adalin Tubes / Valves 5 28th August 2007 09:52 PM
strange tube G1 S/5 Mr. Triatic Tubes / Valves 22 6th June 2006 10:42 AM
strange tube gianis Tubes / Valves 10 7th March 2005 10:42 PM
Strange Tube adalin Tubes / Valves 11 14th July 2004 07:30 AM


New To Site? Need Help?

All times are GMT. The time now is 10:53 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2