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RadiolaGuy.com : deForest spherical audion : deForest ...
http://www.radiolaguy.com/Tubes/Deforest_Audion_Tubes.htm
deForest Audion Tubes rare and collector vacuum tubes for sale . HOME. FOR SALE & GALLERY: RADIOLA INFO: WHAT'S NEW: RESOURCES: LINKS: AT AUCTION: INFORMATION: CONTACT: updated 10/11/20: Ordering & Shipping Info > …
RadiolaGuy.com : deForest spherical audion : deForest ...
https://www.radiolaguy.com/Tubes/Rare,%20collector%20tubes.htm
2 - available in good cosmetic condition for display (have good filament but test very weak) $40.00 each. size Compare. DV3-A, small UV base (like a UV-199), Isolantite Ceramic Base. a cute little seldom seen tube, functionally similar to the UV-199. 2 available Cosmetically perfect but non-functional, for display only) $55.00 each.
DeForest Spherical Audion - "Double Wing" - High Quality ...
https://www.radiodaze.com/deforest-spherical-audion-double-wing-high-quality-reproduction-item-rdw-112/
A high quality reproduction of a DeForest "Double Wing" spherical audion. Reproduction was made by Phil Weingarten (see brief biography). This was fabricated to be functional and filament continuity tests good - however untested otherwise. See photos.
Deforest Audion 450 - My Collection of Vacuum Tubes
http://tubeslover.weebly.com/deforest-audion-450.html
Deforest Audion 450. For sale. Comes with a pair of original boxes. Boxes are in very poor condition with tear and open sides. Both the bases are slightly loose. Tested with Amplitrex AT-1000. Test results as follows: Tube 1 Transconductance (Gm): 2.04 mA/V
DEFOREST "SPHERICAL AUDION" VACUUM TUBE W/ …
https://www.ebay.com/itm/175025507620
DeForest Audion Isolantite Tube - DV Type Tube. $21.00 + $5.00 shipping + $5.00 shipping + $5.00 shipping. Matched Quad of GE 6550A NOS NIB Vacuum Tubes. $500.00. Free shipping Free shipping Free shipping. 2 Used Mullard EL34 6CA7 - 1 xf1 Fat Base Halo & 1 xf4 D Getter Brown Base Tubes. $175.00
Deforest Audion 510 - My Collection of Vacuum Tubes
http://tubeslover.weebly.com/deforest-audion-510.html
For sale. Two (2) rare Deforest 510, inverted cup getter. Hard to find. Tested with Amplitrex AT-1000. Test results as follows: Tube 1 Transconductance (Gm): 1.5 mA/V Tube 2: Transconductance...
DeForest Album - Society of Wireless Pioneers
https://www.sowp.org/deforest-album/
DeForest RJ5 Audion Detector – $25. DeForest RJ Type Wavemeter – $65 with telephone receiver. DeForest Single Audion Receiver. DeForest Special Receiving Tuner and Audion Detector. DeForest Standard 3-Step Audion Amplifier – $500. DeForest UL-2 Audion Amplifier – $200. DeForest “VD 3-1/2” Variable Condenser – $35 plus $5 for ...
One Marconi Deforest Audion Type VT 32 A Orange …
https://www.ebay.com/itm/384523328502
PAIR Rare DeForest Audion 471-A Globe Audio Tubes for Display Only 71A 271 371. $16.99 + $5.00 shipping + $5.00 shipping + $5.00 shipping. Picture Information. Image not available. Mouse over to Zoom-Click to enlarge. Hover to zoom. X. One Marconi Deforest Audion Type VT 32 A Orange Vacuum Tube Vintage ...
DeForest Audion Tube, Type D-01A, circa 1924 - The …
https://www.thehenryford.org/collections-and-research/digital-collections/artifact/256334
Dr. Lee De Forest was an inventor, engineer, and the self-styled "Father of Radio." In 1906, De Forest invented the Audion tube, allowing the detection and amplification of weak radio signals. As the first triode vacuum tube, the Audion revolutionized radio broadcasting--and made it more practical. By the late 1920s, vacuum tube radios were the widespread in people's homes.
Antique Radio Forums • View topic - DeForest Ultra Audion ...
https://antiqueradios.com/forums/viewtopic.php?t=398785&start=0
DeForest Ultra Audion Amp & Siren Seriel #11 Detector Tuner Sold: $12,000. Top . LDighera Post subject: ... A partial explanation of this "siren" effect has been given by De Forest,' but the present paper is not concerned further than to note that it must be strictly avoided in beat-tone reception. After several months of practical experience ...
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