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Huge Selection of DeForest Vacuum Tubes - Vacuum Tube …
http://vacuumtubeemporium.com/deforest-tubes.html
$54.80 Two Vintage DeForest #427 Vacuum Tubes $4.95 deForest D-01A Triode Vacuum Tube For Display $19.99 LEE DEFOREST TUBE AUDION VALVE TRIODE PIP TOP ENGRAVED BASE 1920's PRE AMPLIFIER $350.00 DL5 VALVOLA DEFOREST TUBE VALVE röhre RADIO Radiophone F5AL FINALE AUDIO BF 112A $249.90
World Tube Company: 427 ( UT ) DeForest
https://www.worldtubecompany.com/mm5/merchant.mvc?Screen=PROD&Store_Code=WTC&Product_Code=427U&Category_Code=90-U
The DeForest 427 Vacuum tube is a glass type used as a voltage amplifier or detector in AC-operated receivers. It requires a five-contact socket. Electrical Data:
DeForest Audion 427 Type 27 Globe Test NOS 1025gm …
https://www.ebay.com/itm/174560467873
Mutual Conductance: 1025gm where 630gm is minimum and 820gm NOS. Manufacturer: DeForest. But this the way of the world now. We are always looking to buy more tubes. Large collections, small collections, it doesn't matter.
DE FOREST AUDION 427 - FILAMENT GD - VALVE TUBE - …
https://www.ebay.com/itm/184928425108
FILAMENT TEST PASSED. Otherwise untested.
TOTALLY OT QUESTION (Vacuum Tubes) | Pilots of America
https://www.pilotsofamerica.com/community/threads/totally-ot-question-vacuum-tubes.60758/
Been looking for a week and can't find pinout or filament voltage of a #427 DeForest Audion vacuum tube. 5 pin, no plate cap. Any suggestions (my oldest ARRL 1961 and 1939 Aeronautical Radio manuals don't list them)? Jim weirdjim, Jun 23, 2013 #1.
Antique Radio Forums • View topic - DeForest Type C.F ...
https://antiqueradios.com/forums/viewtopic.php?t=398787
DeForest Ultra Audion Amp & Siren $12,000.jpg [ 456.68 KiB | Viewed 427 times ] DeForest Ultra Audion Amp & Siren $12,000_1.jpg [ 437.72 KiB | Viewed 427 times ] DeForest Ultra Audion Amp & Siren $12,000_2.jpg [ 433.9 KiB | Viewed 427 times ] DeForest Ultra Audion Amp & Siren $12,000_3.jpg [ 218.29 KiB | Viewed 427 times ]
AUDION_DeForest , Tube AUDION_DeForest; Röhre …
https://www.radiomuseum.org/tubes/tube_audion_deforest.html
Description. Prototypes of the most early three-electrode Audion tubes for Lee de Forest. Edison candelabra base, round bulb. The predecessor was the two-electrode Audion of 1906. Text in other languages (may differ) Tube prices. 9 Tube prices (visible for members only) AUDION_DeForest: eigene Röhre.
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