Antique radios, Old Time Radios

KBC1

Country:	Europe		Brand:	Common type Europe tube
			Tube type:	Double Diode-Triode Audio Frequency

Tube ID = 829

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Identical to	KBC1 = DDT2 = TKBC1 = BDDT61
Similar Tubes	Other base: DDT2B; KBC1_UX6; KBC32
First year	Nov.1934 Ad for a model in Nov. 1934, Australia.
First Source (s)	Mar.1935 : Philips Bulletin # D24 Nov.1938 : Funk, Die Zeitschrift des Funkwesens 1938 #21
Successor Tubes	1940 DBC21 DAC21 DBC21_9pin

Base	Europe side contact base P (P8A) (Codex=Su)
Filament	Vf 2 Volts / If: 0.1 Ampere / -: Direct / -: Battery = /
Description	EE: An ad November 30th 1934 in "Radio & Electrical Merchant" Australia shows a battery console model 46 Challenger with KF2, 1C6, KF2, KBC1, B217 and B240. It is not unlikely that this model could not be delivered until the tube was on market in 1935. Many months before the official market introduction, some manufacturers get pre series examples to build circuits with them ... Text in other languages (may differ)
Tube prices	1 Tube prices (visible for members only)
Literature	Taschenbuch zum Röhren-Codex 1948/49


	KBC1: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus †

KBC1: My tubes
Anonymous 413 Collector

KBC1: Telefunken Werkstattbuch
Wolfgang Bauer

KBC1: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

Usage in Models	1= 1934 ; 7= 1935 ; 3= 1936?? ; 6= 1936? ; 34= 1936 ; 4= 1937? ; 35= 1937 ; 1= 1938? ; 38= 1938 ; 1= 1939?? ; 3= 1939? ; 37= 1939 ; 12= 1940 ; 5= 1941 ; 1= 1942 ; 1= 1946
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 189

Forum contributions about this tube
KBC1
Threads: 1 | Posts: 3

Hits: 395 Replies: 0 KBC1 (KBC1)
Stuart Irwin 08.Jan.12	1 KBC1 (KBC1) Hello, I notice that this valve is listed as being available from March 1936. However, I have an article from "Radio & Electrical Merchant" (Australia) dated 30/11/34 that mentions this valve. Please refer to the attachment. Any comments? Regards, Stuart Irwin
Ernst Erb 08.Jan.12	2 Base the same on KBC1 as we show for it? Dear Stuart Great find! You are by far the most active member in Australia and your colleagues can be thankful that you have done so much for an Australian radio catalog. Congratulations! I have made corrections for the tube (valve) but I'm not sure if it is the same base and base connections as here in Europe? Have you any idea how we can find out? It is naturally possible that the set could not be sold until March 1935 but circuit and chassis could have been made by using the usual pre-series tubes received ... Or that Australia was then the test market for that.
Stuart Irwin 09.Jan.12	3 KBC1 Base Dear Ernst, Thank you very much for your kind comments. The KBC1 was available only with the P base in Australia. The other European valves used in this radio were available with USA type bases in Australia but I can't say with absolute certainty that the ones included in the model 46 are so fitted. Some European P base valves were manufactured in Australia by Philips with octal bases fitted but these didn't come out until the late 1930s. They had a "G" suffix added; eg. KL4G. Regards, Stuart

KBC1
End of forum contributions about this tube

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