The 12BE6 is a heptode or pentagrid valve. The heptode is classically pins, is 47 mm tall. References: Datasheet &. Type 12BE6 was first introduced in 12BA6. 12BE6. Page 1. !! C. CE ELECTRONICS. 12BABE6. – DESCRIPTION AND RATING. BA6. 12BA6 Remote-Cutoff Pentode. The 12BA6 is a. electron Tube Data sheets – 1. 12BE6, General Electric, H, ( bytes). 12BE6, Brimar, H, ( bytes). 12BE6 photo, RCA (RC30).

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Once again, the problem of coupling between the circuits would be ever present. A major advantage was that by using grid 1 as the signal input grid, the device was more sensitive to weak signals. Collection of Massimo Pedrina I. List of vacuum tubes List of tube sockets. Thanks for the reference to the 12SG7 pentode.

Collection of Werner Sticht D. The use of a pentode would seem an unlikely choice for a frequency converter because it only has one control 12b6.

12BA7 to 12BE6 or 12SA7

One triode operated in a conventional oscillator circuit. The contrast in cutoff voltages you report illustrates clearly the different AGC action for these two tubes. Instead of the 12SK7. The pentagrid converter is a type of radio receiving valve vacuum tube with five grids used as the frequency mixer stage of a superheterodyne radio receiver. All the ingredients for the pentagrid were now in place. The difference in performance between the two tubes was not as obvious as it was with 12BA7 vs 12SA7 pentagrid mixers mentioned above, despite a two-to-one ratio in transconductances in the pentodes.

Views Read Edit View history. Thanks for the information of the measured voltages. Because grid 2 was a ‘leaky’ anode in that it allowed part of the modulated electron stream through, the oscillator was coupled into the mixing section of the valve.

Collection of Aldo Patriarca CH. The conversion diagrams show a fairly straight-forward method of wiring up socket adapters. Please help to improve this article by introducing more precise citations. At least one reference claims that the bi-grille was self-oscillating, but this has not been confirmed.


I compared reception for three different stations:. In the UK, the five grids operated thus. Besides this they datasyeet direct replacement. Also keeping the oscillator signal out of the antenna circuit was difficult. Collection of Otto Frosinn D. However, the Ferranti company of Great Britain entered the valve business with the first known UK-produced pentagrid, the VHT4late in though it must have been in development, and would certainly have existed as a prototype well before 12be66 time.

Collection of Martin Steyer D. A cursory look through European Hexode-Triode frequency converters shows a range of conversion transconductanc between uS and uS.

I was a bit surprised with the results. List of vacuum tubes. Following pressure from the UK manufacturers, the BVA were compelled to relax the rules and the UK started to adopt triode-hexode mixers. The idea was to produce a single valve that not only mixed the oscillator signal and the received signal and produced its own oscillator signal at the same time but, importantly, did the mixing and the oscillating in different parts of the same valve.

It is known that Donald G.

12BE6 @ The Valve Museum

The novel part about the design was dagasheet grids 2 and 3 were constructed as beam-forming plates. For other types of frequency converters please, see Frequency mixer. The clever bit was that the X41 was a direct plug-in pin-compatible replacement for the MX This article includes a list of referencesbut its sources remain unclear because it has insufficient inline citations.

The device had no suppressor grid. You reach this tube or valve page from a search after clicking the “tubes” tab or by clicking a tube on a radio model page. The cathode is tied to the suppressor grid.

I looked for the same type of log scale plot that was used in the 12SK7 data sheet, in the data sheets of the other tubes, but could not find any. The reasons were to differ from the UK to America. The first devices designed to change frequency in the manner described above seem to have been developed by the French, who simply dtasheet two grids into what would otherwise have been an ordinary triode valve the bi-grille.


The pentagrid converter in either guise operated extremely well, but it suffered catasheet the limitation that a strong signal was able to ‘pull’ the oscillator frequency away from a weaker signal. It was used on the Hallicrafters Echophone Wikimedia Commons has media related to Pentagrid.

One UK company, MOVsuccessfully enforced the cartel rules against the German Lissen company in when they attempted to market a radio in the UK which had the triode-hexode mixer. Some of the extra current in this radio dayasheet from the 35L6 pentode pair used in parallel at the output.

Grid 2 functioned as both a screen and the oscillator anode; in datasheet case the grid wire had to be present to provide the screening.

The 9 pin socket of the 12BA7 even fits very nicely inside bakelite plug. One company, Osrammade an ingenious move. Some manufacturers that had adopted the autodyne mixer converted some, if not all, of their designs to pentagrid mixers.

TDSL Tube data [12BE6]

July Learn how and when to remove this template message. It resulted simply from the addition of an extra screen grid to the UK version of the pentagrid heptode. The hexode six-electrode was actually developed after the heptode or pentagrid. Best regards, Jose Vigil ell. The pentagrid was part of a line of development of valves that were able to take an incoming RF signal and change its frequency to a fixed intermediate frequencywhich was then amplified and detected in the remainder of the receiver circuitry.