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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From Wikipedia, the free encyclopedia. It would therefore have been quite impossible to prevent the signal from one grid coupling out of the other.
Re-registered in June with the same cathode-heater insulation. This page was last edited on 18 Marchat The American Federal Communication Commission FCC started requiring radio manufacturers to certify that their products avoided this interference under Part 15 of their rules. Best regards, Jose Vigil 12ge6.
It would have been interesting to superimpose the transconductance curves for the various pentodes. Collection of Massimo Pedrina I.
Since the oscillator circuit was more or less self-contained, good feedback for reliable oscillation across the frequency range was easy to obtain. Grid 2 functioned as both a screen and the oscillator anode; in this case the grid wire had to be present to provide the screening.
In other words, all the current into the radio must pass through the 6SB7Y heater. The cathode was connected to a secondary coil on the oscillator coil and thus coupled the oscillator into the pentode mixer section, the signal being applied to grid 1 in the 12bee6 manner. About the use in a medium wave set such as the Emerson 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.
Collection of Werner Sticht D. Some of the extra current in this radio comes from the 35L6 pentode pair used in parallel at the output.
electron Tube Data sheets – 1
List of vacuum tubes List of tube sockets. Thus the grid configuration was grid 1, signal input; grids 2 and 4 screen grids connected together – again, dayasheet internally and grid 3 was the oscillator input.
All the ingredients for the pentagrid were now in place. Also keeping the oscillator signal out of the antenna circuit was difficult.
12BA7 to 12BE6 or 12SA7
Views Read Edit View history. One triode operated in a conventional oscillator circuit. The device had no suppressor grid. However, the UK device is different from its American counterpart. Dataseet company, Osrammade an ingenious move.
Thanks for the reference to the 12SG7 pentode. I started on the 12SG7 tube page and followed some of the radio links. The Americans appeared to be driven by the desire to produce a low-cost ‘every expense spared’ datassheet which was to lead to the All American Five. For about the same plate and screen voltages, the cut off grid voltage is almost three times larger on the 12SK7.
Collection of Danko Tkalec HR. The improvement for both radios was also quite obvious to my ears. The use of a pentode would 12b6 an unlikely choice for a frequency converter because it only has one control grid. It resulted simply from the addition of an extra screen grid to the UK version of the pentagrid heptode.
Collection of Ottmar Rollmann D. The pulling effect had a beneficial side effect in that it gave a degree of automatic tuning. Please help to improve this article by introducing more precise citations. Collection of Patrice Zeissloff F. I will try it when I have a 12BA7. Wikimedia Commons has media related to Pentagrid.
12BE6 @ The Valve Museum
The clever trick to supply the additional current for the 6SB7Y heater is to wire it’s heater in series with the other heaters, as well as in series with the rectifier path. Mullard’s ECH81 became popular with the move to miniature nine-pin valves. The Mullard ECH35 was a popular choice.
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. Grid 4 screened this from the anode, and grid 5 was a suppressor grid to suppress secondary emission. Retrieved from ” https: The reasons were to differ from the UK to America. Capacitor types Ceramic resonator Crystal oscillator Inductor Parametron Relay reed relay mercury switch.
In the UK, the five grids operated thus. It has a clear advantage for weak signals. Some manufacturers that had adopted the autodyne mixer converted some, if not all, of their designs to pentagrid mixers.
The 12SG7 was often used as the RF preamp in some designs: The UK manufacturers were initially unable to use this type of mixer because of the BVA prohibition on multiple structures and indeed unwilling to use separate valves because of the levy. The pentagrid proved to be a much better mixer.