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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Datashwet was a bit surprised with the results. The Mullard ECH35 was a popular choice. One company, Osrammade an ingenious move. The manufacturer’s information also notes that the valve’s high performance comes at a cost of a high heater current of mA — double that of more conventional types. Potentiometer digital Variable capacitor Varicap.

Although technically a four-component electrode device, neither the term tetrode nor the tetrode valve as it is known today had yet appeared. Thanks for the information of the measured voltages.

12BA7 to 12BE6 or 12SA7

I started on the 12SG7 tube page and followed some of the radio links. The pulling effect had a beneficial daasheet effect in that it gave a degree of automatic tuning.

They are pins 3 and 5 that in some sets are short circuited. The cathode was common to both sections of the valve. InPhilips invented a technique of adding yet another grid to combat the secondary emission that the tetrode suffered from. The specified conversion transconductance for these three pentagrid converters is as follows: Further, they dictated that not more than one electrode structure could be contained in a single envelope which would have evaded the royalty – at least in part.

It is correlated with the characteristics of the General Electric data sheet that I overlooked.

Instead of the 12SK7. Besides this they are direct replacement. In some designs, a suppressor grid was added to produce yet another heptode design. The 7pin plug for dxtasheet 12BABE6 socket adapter is hard to find. InEdwin Armstrong used only triodes when he invented the superheterodyne receiver.


The 9 pin socket of the 12BA7 even fits very nicely inside bakelite plug. Collection of Christian Schaufelberger CH. The octal plug is very easy to reclaim from a dead octal tube. It has a clear advantage for weak signals. Collection of Ottmar Rollmann D. In North America, the only octode manufactured was the 7A8. This scheme works so well that a 68R resistor was wired in parallel with the 6SB7Y heater to shunt away some 90mA of excess current.

In America, the configuration was different. 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 conventional manner.

electron Tube Data sheets – 1

List of vacuum tubes List of tube sockets. The novel part about the design was that grids 2 and dwtasheet were constructed datashet beam-forming plates. Another triode acted as datasgeet mixer by coupling the oscillator signal into the mixer’s cathode and the received signal to the grid. Collection of Aldo Patriarca CH. Designed for low-cost AC radios, the device was deliberately designed datashet allow strong signals to pull the oscillator without the risk of radiating the oscillator signal from the aerial.

By using this site, you agree to the Terms of Use and Privacy Policy. I compared reception for three different stations:. It would therefore have been quite impossible to prevent the signal from one grid coupling out of the other. Some of the extra current in this radio comes datasjeet the 35L6 pentode pair used in parallel at the output. Grid 4 screened this from the anode, and grid 5 was a suppressor grid to suppress secondary emission. Some manufacturers that had adopted the autodyne mixer converted some, if not all, of their designs to pentagrid daatsheet.

Adding the suppressor allowed Sylvania to lower the current of the 6. Introduced by Sylvania in and used mostly by Philcothis valve was the product of adding a suppressor grid to type 7B8which was the loctal version of type 6A7.


I managed to wedge the original 12SA7 in the lower left corner of the case. Other candidate pentodes with a compatible octal pinout and remote cutoff might be: 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.

Collection of Danko Tkalec HR. Wikimedia Commons has media related to Pentagrid. This was done in such a way that Philips claimed that the oscillator electron beam and the mixer electron beams were separated as much as possible datadheet thus the pulling effect was minimised.

Collection of Emilio Focosi I. A cursory look through European Hexode-Triode frequency converters shows a range of conversion transconductanc between uS and uS.

Hot rodding AA5 radios

This allowed Philco to use this valve fatasheet every line of radio throughout the s. The invention of the tetrode demonstrated the idea of screening electrodes from each other by using additional earthed grounded grids at least, as far as the signal was concerned. Collection of Peter Steffen CH. Collection of Karlheinz Fischer D.

It is clear that there is a significant difference in AVC response of these two tubes.

By making the mixer self-oscillate, the necessity of providing a separate oscillator valve is avoided. Thus the grid configuration was grid 1, signal input; grids datasyeet and 4 screen grids connected together – again, usually internally and grid 3 was the oscillator input.

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