The Master Of Magnetics "Steven Mark"

[Motorcoach1]

@ all tubes are labled this way for a reason the KISS methodÃ,   6 is the heater voltage , or it could be 9, 4 , 12 - BQ is the type of tubeÃ,  ( bias saturationÃ,  plate type )Ã,  7 is the glass envelope or enclosuer when metal is used itÃ,  may be followed by an M .Ã,  Heath kit made a super hetrodine 5 tube radio as a kit this tube in it is a good cannadate for this operation. it's not the 6QB7 tube you'll have to look it up it is simular. Oh by the way that horse wasn't Mr ED by any chance harhar.Ã,   Oh by the way drop the voltage 1 volt on the heater it only stays on for a few seconds anyway and when the tube hits the right temp the filliment in the tube opens to stop the heater from working as the tube is running under it preformed task. The little white stuff is the barrium that is put in there to get rid of any moisture that may be present at time of manufactureing , this flashes and leaves the film and dose not mean the tube is bad.Ã,  MikeÃ, 

[innovation_station]

marco it is as i know a 6.3v heater thankyou mike for the break down of the tube #ing

from some of the circuits i found in the old books say only the heater is to be powered then a flick of a switch or a wave of a mag to start osc

is

[Motorcoach1]

@ Inovation It's been a while sence I've played around with Tubes , There not hard to understand it's when you get in to the 60's and 70's hybred transistor stuff that gets tricky I would look at how AGC circuts work with tubes that gets intresting. In the music scales Fa is a funny resonant to play with if you have a tone generator or keyboard , hammond B6 was my fravorite. 

[joe dirt]

This is my last bit-o inspired thinking with this thing, after this, I got nutten,  might
  as well play a game of pool in the dark.

Three frequencies, try to make these correspond with Red,Blue, and green, reason
  for this is 3 lasers, each a different color, can be combined through a prism and
  create white light.  I seen this experiment done in an issue of scientific american
  magazine,  I can,t find it on the net but this link is a good example:   

http://www.physicsclassroom.com/Class/light/U12L2d.html

also a link to demonstrate that the magnets used in the video,s may not be for reed
  switches only:

http://www.youtube.com/watch?v=6TwRnR2rMs0&NR=1

Dirt

[rMuD]

This is my last bit-o inspired thinking with this thing, after this, I got nutten,  might
  as well play a game of pool in the dark.

Three frequencies, try to make these correspond with Red,Blue, and green, reason
  for this is 3 lasers, each a different color, can be combined through a prism and
  create white light.  I seen this experiment done in an issue of scientific american
  magazine,  I can,t find it on the net but this link is a good example:   

Now your talking lasers, being in the Laser show industry for 10+ years..  and have access to very very high energy "White" lasers.. and we don't use prisms to combine..  we use dicro filters to combine colors (Reflect one wavelength pass another).. or actually use RF to difract the different wavelengths to pick off each color as a ION white light laser has as many as 6 usable wavelength coming from one tube known as a Poly-Chromatic Acousto Optical Modulator (PCAOM). 

To increase the output power, Large Lasers use large magnets around the tube to "Pinch" the plasma to concentrate the excited plasma.  The next step up from that is to exaust the hot gases and use fresh cold gases to get a magnitude of more power out "Flow Gas"  not used in color lasers much, mostly IR CO2 lasers to put out 1000's of watts.   

Fun things with High energy lasers, for example... when scanning a image (Vector) at around 20-30 frames a second.. if you walk thru the beam, paper or metal in your pocket will vibrate enough that you can easily hear it (20-30 Watt laser or more).

Two things that cross over that might be helpful

#1 I've heard in these thread of people wanting to use a sound card to generate the signal...  Sound Cards are AC coupled you need a DC coupled signal so your have a signal that doesn't drift.

#2 In the Laser Show Industry we make "Abstracts" http://dabble.com/node/14522830  X-Y Representations of 1-3 oscillators Y Signal usually the COS of the SIN (Inverted X Signal)   same thing can be done on your scope.. put it in XY mode, invert Y input.. you got a circle with no input signal..  pump your multi-freq signal in..  makes it alot easier to see complex waveforms...  you can see things like rotations of the combined waveforms.. colapsing of the waveforms.. doesn't cost anything to try if you have a 2-channel scope already


Here is a guy that convered a 8 channel turtle beach sound card to DC coupled and output to scanners  http://www.akrobiz.com/laserboy/ I sold him the laser projector years ago..  good guy electronic and speaker/audio tinkerer