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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I made a casual measurement of the performance improvement with the Teletone with a DC measurement of the AGC line:. 12ne6 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. Potentiometer digital Variable capacitor Varicap.
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 these circuits, the suppressor grid 3 acted as the oscillator grid, and the valve operated in a similar manner to a true pentagrid. Capacitor types Ceramic resonator Crystal oscillator Inductor Parametron Relay reed relay mercury switch.
The pulling effect had a beneficial side effect in that it gave a degree of automatic tuning. The Americans appeared to be driven by the desire to produce a low-cost ‘every expense spared’ design which was to lead to the All American Five. The 9 pin socket of the 12BA7 even fits very nicely inside bakelite plug. I will take a close up photo of the dial to upload at the model page. Perhaps with nearby stations the crossover distortion is a problem. Some of the extra current in this radio comes from the 35L6 pentode pair used in parallel at the output.
12BA7 to 12BE6 or 12SA7
The conversion diagrams show a fairly straight-forward method of wiring up socket adapters. In order to distinguish between the two versions of the heptode, manufacturers data often describes them as “heptode of the hexode type” for a heptode without a suppressor grid, and a “heptode of the octode catasheet, where a suppressor grid is present. I managed to wedge the original 12SA7 in the lower left corner of the case.
Antique radios, Old Time Radios. 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.
Also keeping the oscillator signal out of the antenna circuit was 12bs6.
The clever bit was that the X41 was a direct plug-in pin-compatible replacement for the MX Datasheeg 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. Collection of Aldo Patriarca CH. Retrieved from ” https: Views Read Edit View history. For about the same plate and screen voltages, the cut off grid voltage is almost three times larger on the 12SK7.
Although technically a four-component electrode device, neither dahasheet term tetrode nor the tetrode valve as it is known today had yet appeared.
Pentagrid converter – Wikipedia
The improvement for both radios was also quite obvious to my ears. Collection of Danko Tkalec HR. Datashewt first devices designed to change frequency in the manner described above seem to have been developed by the French, who simply put two grids into what would otherwise have been an ordinary triode valve the bi-grille.
Quantity of Models at Radiomuseum. In other words, all the current into the radio must pass through the 6SB7Y heater.
Transconductance for the 12SG7 is umhos. Frequency mixers Vacuum tubes.
12BE6 Datasheet, PDF – Alldatasheet
The 12BA7 gives twice the conversion transconductance of the other tubes. You even can look up radio models with a certain tube line up.
This was dqtasheet in such a way that Philips claimed that the oscillator electron beam and the mixer electron beams were separated as much as possible and thus the pulling effect was minimised. 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. The use of a pentode would seem an unlikely choice for a frequency converter because it only has one control grid.
The device had no suppressor grid. 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.