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The 6BN6, An Amazing Little Mixer – Grayson Evans's ...
https://kj7um.wordpress.com/2020/12/05/the-6bn6-an-amazing-little-mixer/
The audio output dropped off to 0.5 Vpp when the IF level dropped below about 0.05 Vpp. I ran the test at an IF of 1 MHz, 5 MHz, and 10 MHz, with 2 kHz spacing and the results were exactly the same. There is no performance …
THE 6BN6 GATED BEAM TUBE - Radio Museum
https://www.radiomuseum.org/forumdata/users/5100/6BN6_part2_sw.pdf
The 6BN6 Gated Beam Tube Part 2 Digitized 08/2007 by Thomas Günzel für www.radiomuseum.org current completely. Since the beam current is of constant amplitude, switching of that current away from the plate circuit by making either of the negative causes the current in the accelerator circuit to increase, yielding a negative transsconductance
6BN6 The Original - Part 1 - Radio Museum
https://www.radiomuseum.org/forum/6bn6_the_original_part_1.html
The f-m detector circuit used in connection with the 6BN6 goes back to a very similar circuit invented in 1936. At this early date, I. Zakarias2 proposed the use of a pentagrid tube for f-m detection. The signal was applied to the first control grid and a resonant circuit was connected to the second one, driven by space-charge coupling.
6BN6 @ The Valve Museum
http://www.r-type.org/exhib/aaa0277.htm
6BN6. Type 6BN6 is a late 1940s 'gated beam' FM discriminator. The envelope appears to contain two or three electrode systems, but close examination reveals that there is only one heater/cathode assembly, seen on the left. The ribbon of electrons that are formed (the beam) is guided across the width of the valve to the cavity (anode) on the ...
The Gated-Beam Valve
http://www.r-type.org/articles/art-152.htm
Fig. 4. Practical circuit with component values for the 6BN6 valve. As before, the desired audio signal can be recovered by means of an integrator or low-pass filter. Appropriate choice of low-pass filter components can provide simultaneous de …
FM Tube radio design | diyAudio
https://www.diyaudio.com/community/threads/fm-tube-radio-design.127487/
From there, it goes to a 6BN6-based limiter+quadrature detector to extract the audio signal which goes to power amp (or the LA3361 stereo decoder) and also fed back to the front end's AFC input. So as you can see, basically i want to …
Radio Road - Audio Asylum
https://www.audioasylum.com/cgi/vt.mpl?f=tuner&m=12838
I recently bought new tubes for my H-K F50Xk FM tuner to do an alignment. During warm-up the unit caused a loud crash in the audio then smoke curled out of the tuner chassis. A B+ supply resistor to the plate circuit of the 6BN6 IF amp/limiter stage was fried.
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