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117Z6G

Información - Ayuda 
ID = 3583
       
País:
Estados Unidos
Marca: Common type USA tube/semicond.
Tipo:  High-vacuum Rectifier   Power-supply 
Idéntica a 117Z6G
Válvulas similares
Other shape (e.g. bulb type):
  117Z6GT
Otras conexiones:
  117Z6GC
Fuente principal (es)
22.May.1939 : Electron Tube Registration List
Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ue)
Filamento Vf 117 Volt / If 0.075 Ampere / Half indirect / Specified voltage AC/DC
Descripción 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). 
Texto en otros idiomas puede diferir
Literatura 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
Mas ...
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
Uso en Modelos 1= 1939? ; 6= 1939 ; 29= 1940 ; 2= 1941?? ; 27= 1941 ; 1= 1942? ; 4= 1942 ; 1= 1945? ; 4= 1946 ; 4= 1947?? ; 1= 1947
Número de modelos en Radiomuseum.org con esta válvula:80

Colección personal de

Aldo Patriarca (CH)
 
117z6g_sylvania_1.jpg

 
Contribuciones en el Foro acerca de este válvula
117Z6G
Hilos: 1 | Mensajes: 2
Entradas: 908     Réplicas: 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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