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117Z6G

Information - Aide 
ID = 3583
       
Pays:
Etats-Unis
Fabricant: Common type USA tube/semicond.
Type:  High-vacuum Rectifier   Alimentation 
Identique à 117Z6G
Similaires
Autre forme (type de tube) :
  117Z6GT
Autres raccordements :
  117Z6GC
Première source
22.May.1939 : Electron Tube Registration List
Culot Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ue)
Chauffage Vf 117 Volt / If 0.075 Ampère / Half indirect / Specified voltage AC/DC
Description Whith two independed diodes to be used as voltage doubler or higher current.
NOT intended as full wave rectifier.
The cathode of ONE diode is connected to heater pin 7 - (half half indirect). 
Texte dans d'autres langues (peut différer)
Bibliographie Taschenbuch zum Röhren-Codex 1948/49   
117z6g_gt_umgebung.png
117Z6G: Internet
Daniel Consales
s_271_g.gif 117Z6G: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20
Plus d'infos ...
Just Qvigstad 		117z6gt_brimar_radio_valves_and_teletube_manual_1950_no.3_p1_data_pin~~1.png
117Z6G: Brimar Valve and Teletube Manual 1950 (No.3)
Adrian Riesen
Utilisé dans modèles 1= 1939? ; 6= 1939 ; 29= 1940 ; 2= 1941?? ; 27= 1941 ; 1= 1942? ; 4= 1942 ; 1= 1945? ; 4= 1946 ; 4= 1947?? ; 1= 1947
Modèles de Radiomuseum.org avec ce composant :80

Collection de

Aldo Patriarca (CH)
 
117z6g_sylvania_1.jpg

 
Contributions forum pour ce composant
117Z6G
Discussions: 1 | Publications: 2
Vus: 918     Répondre: 1
Heater center tap of 117Z6G
Torbjörn Forsman
21.Apr.26 		  1
Heater center tap of 117Z6G 

According to the September-October 1940 issue of Sylvania News, see page 18 here , the center tap of the heater was removed from those tubes of later production, as UL considered it a safety risk. For replacement purposes in the seldom cases where the center tap was needed, the variant 117Z6GC was introduced.

The socket diagrams at the tube page show both versions with and without center tap, without comments so far.
Michael Watterson
21.Apr.26 		  2
Heater center tap of 117Z6G 

I downloaded and read the article.

I'm curious.

1. Why would parallel operation at 58.5V ever be wanted?

2. Why did "Fire Underwriters" (UL?) rule the centre tap was not permissible?

"The cathode of ONE diode is connected to heater pin 7 - (half half indirect)"

How does that work on a direct AC mains set? It's not shown in the base diagram.

I've only encountered the 117Z3
 
117Z6G
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