6AQ5
The 6AQ5[1] (Mullard–Philips tube designation EL90) is a miniature 7-pin (B7G) audio power output beam tetrode vacuum tube with ratings virtually identical to the 6V6 at 250 V.[2] It was commonly used as an output audio amplifier in tube TVs and radios. It was also used in transmitter circuits.[3] There are versions of this tube with extended ratings for industrial applications which are designated as 6AQ5A[4] (with controlled heater warm-up characteristic), and 6AQ5W/6005[5] or 6005W (shock and vibration resistant).
A push–pull pair is capable of producing at least 10W audio output power in class AB1.
Also, in some cases it was used as a vertical deflection output tube during the 1950s, being also rated for this purpose. For this application, 6AQ5-A was preferred. It was used for 70- and 90-degree picture tubes, but also in some early colour sets in the frame output.
Other close or equivalent tube types are: 6HG5, 6HR5, 6669, 6BM5, N727, CV1862 and the Tesla 6L31. The 6CM6,[6] like the Russian 6P1P (6П1П),[7] while electrically equivalent (up to 250 V anode voltage), have a 9 pin (B9A) base. Another similar, but not identical, amplifier pentode with a miniature 9-Pin base (B9A), used in consumer electronics was the 6M5.
See also
References
- ↑ Datasheet 6AQ5, General Electric Beam Pentode, June 1955, from tubezone.net
- ↑ Tomer, Robert (1960). Getting the Most Out of Vacuum Tubes. Photofact Publication. p. 97. Search this book on
- ↑ Busch, R.T. (October 1933). "The Amateur Emergency Network of the W.1.A. (Victorian Division)". Complete Australian Amateur Radio Magazine. Wireless Institute of Australia.
- ↑ Datasheet 6AQ5A, RCA Beam Power Tube, Nov. 1958
- ↑ Datasheet 6005/6AQ5W, CSF Tétrode a faisceaux dirigé, March 1957 (in French)
- ↑ Datasheet 6CM6, Sylvania Beam Power Pentode, Jan. 1956
- ↑ Datasheet 6П1П, CCCP Output Beam Tetrode, 1970 (in Russian and English)
External links
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