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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The reasons were to differ from the UK to America.
Collection of Werner Sticht D. In these circuits, the suppressor grid 3 acted as the oscillator grid, and the valve operated in a similar manner to a true pentagrid.
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Grid 4 accepted the incoming signal with the remaining two grids, 3 and 5 connected together usually internally which acted as screen grids to screen the anode, grid 4 and grid 2 from each other.
Although not strictly a pentagrid in that it has more than five gridsthe octode eight-electrode nevertheless operates on the pentagrid principle. In the case of the Hallicrafters, the cutting edge of this set was to be a very good short wave receiver at very low cost. Click on these thumbnails for wiring detail: The American devices although having no secondary emission due to the suppressor grid, nevertheless were able to get the required non linearity by biasing the oscillator such that the valve was overdriven.
Replaced by 12BE6A, characterized by controlled warm-up time, for series string heater operation.
Pentagrid converter – Wikipedia
Best regards, Jose from To datqsheet the Author because you find the post helpful or well done. My method to deal with this difference in capacitance is a short procedure: Grid 3 accepted the incoming signal. The All American Five was to use a pentagrid converter from when it first appeared inright up until valves became obsolete when transistors took over. One of the things I enjoy when repairing my tube radios, is getting them to perform 1b2e6 well as they can.
This allowed Philco to use this valve in every line of radio throughout the s. This was exploited in providing the non linearity necessary to produce good sum and difference signals.
RCA mi from It resulted simply from the addition of an extra screen grid to the UK version of the pentagrid heptode. They used a 12SG7 at the IF amp.
electron Tube Data sheets – 1
Besides this they are direct replacement. Another triode acted as a mixer by coupling the oscillator signal into the mixer’s cathode and the received signal to the grid. Designed for low-cost AC radios, the device was deliberately designed to allow strong signals to pull the oscillator without the risk of radiating the oscillator signal from the aerial. The 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.
In America, the configuration was different. The Mullard ECH35 was a popular choice.
12BA7 to 12BE6 or 12SA7
Early examples had difficulty oscillating across the frequency range because the oscillator feedback was via the first intermediate frequency transformer primary tuning capacitor, which was too small to give good feedback.
Collection of Karl – Heinz Bossan D. The pulling effect had a beneficial side effect in that it gave a degree of automatic tuning.
This was known as the autodyne mixer. The cathode is tied to the suppressor grid.
The device had no suppressor grid. The improvement for both radios was also quite obvious to my ears. I made a casual measurement of the performance improvement with the Teletone with a Datashedt measurement of the AGC line: It has a clear advantage for weak signals.