Hi guys
here's a bit of rough diy K-stuff - will have to gather up links to plots and gather data on Transylvania's Tube when weather permits.
does anyone here have info on K-stuff not seen at Ulfman's? - or diy Karlson coupler data to share?
a few K-tubes - LOL
http://home.earthlink.net/~buddhaboy2/tw.jpga long/meadering post on a crude/small bass coupler with added air-mass cavity on its front chamber - warning - a lot of data to load if on dialup:
http://130.89.239.148/kforum/read.php?f=1&i=6473&t=6 473
a 1" ID x 5.5" (sans stub) diy pvc tube with ~0.1" initial gap and half ellipse form vs a modified X15 pipe (just "on-axis" meaning 30 degrees nominal tilt and also a perpendicular plot)
http://home.earthlink.net/~buddhaboy2/9v7.jpg Best,
Freddy
ps - thanks to Tom Danley for pointing out this thread
Karlson's list of inventions 1950 - note "controlled reverb" aspect of the coupler. -believe it occurs in tubes also.
LIST OF INVENTIONS 4/24/50
J.E. (Edward) Karlson
1. ELECTRONIC POTENTIOMETER. A variable element which is capable of linear variations of resistances with infinitesimal mechanical motion yet also have capabilities of broad variations in resistance.
2. CAPLESS DISPENSING TUBE. This device permits the use of toothpaste tubes, etc. without the necessity and bother of removing and replacing the cap after each usage.
3. GEOLOGICAL PROSPECTING SYSTEM. A system for use in the prospecting for oil, minerals, etc. This system may also be used for radar applications.
4. RADAR ANTENNA WITH AUTOMATICALLY VARIABLE BEAM PATTERN. This invention provides a simple means of automatically changing the beam pattern of a radar antenna from a pencil beam to a cosecant beam.
5. DIELECTRIC ANTENNA. This invention provides a technique for designing commercial and military antennas which will have overall dimensions than conventional antennae, and yet have equivalent gain and directivity characteristics.
6. BRUSHLESS DC MOTOR
7. ASHTRAY. An extremely simple design for an ash tray which quickly extinguishes cigarettes.
8. PRECISION DELAY CIRCUIT. This circuit provides a delayed pulse at a precise interval following an initial pulse.
9. CHATTERLESS CONTACTS FOR RELAYS
10. TELEVISION ANTENNA. This invention provides a simple, low cost antenna which can be readily hidden or obscured in the average room and is suitable for both F.M. and television.
11. SLOT ANTENNA. This design provides a slot antenna with broad band matching possibilities.
12. HYBRID WAVEGUIDE JUNCTION. This is a wave guide section which has variable propagation characteristics dependant upon the direction of propagation.
13. R.F. TUNER. a simplified tuner for F.M. and television use.
14. ADVERTISING SIGN. Novel electric sigh with quick change possibilities.
15. LIGHT VALVE FOR TELEVISION PROJECTION AND PICKUP TUBE.
16. ACOUSTIC TRANSDUCER. A novel loudspeaker enclosure with improved matching characteristics and controlled reverberation.
17. FISHING DEVICE
18. TELEPHONE AMPLIFIER WITH SPECIAL ACOUSTIC CHARACTERISTICS
Karlson patents
KARLSON PATENTS:
J.E. Karlson US 2586827 “Directive Radiating System” Filed March 31 1945
J.E. Karlson “Acoustic Transducers” US 2816619 filed Dec. 1951, granted 6 years later - probably due to RCA/Olson filing one - Karlson won.
J.E Karlson “Acoustic System” US 2896736 filed Aug. 1955 (reflective system to go with new "Karlsonette")
J.E. Karlson “Open End Waveguide Antenna” US 3445852 filed 1968 - essentially analogous with the K-tube waveguide used in Karlson’s X15 2-way speaker ~1966.
J.E. Karlson “Acoustic Transducers” - US 3540544 filed 1968 - concurrent with X15 and described Karlson’s use of ellipse based reflectors.
J.E. Karlson “Jet Engine Silencer Nozzle...) US 3543876 filed 1968 - jet engine muffler and rocket nozzles.