Multivoltage Limiter - Jim Limiter

[IN3IEX]

Hi Jim!  Your limiter is great.

http://amfone.net/Amforum/index.php?topic=22341.0

You can see from the simulations.
With three voltage levels it is very progressive. As soon as the waveform goes near zero it becomes stronger and stronger, but never makes a flat clipping.

The simulations are the same circuit with a progressive reduction of the number of diodes. To find which waveform is associated to a circuit just see the name of the waveform, that reports the resistor to which it is related.

Well done Jim!

[WD5JKO]

Georgio,

  Thank You for the kind words. I did that circuit a long time ago, hence the W4CJL stamp on the documents. This guy, Hoisey Hosington was the founder of SPAM.

   I will follow up later, but that circuit has evolved over the years into other rigs with working examples on my Retro-75 (posts here on amfone), and my Gonset G-76 (posts on amforever). These both used a single passive keep alive supply, but still employ the concept of negative cycle attenuation, instead of loading. The G-76 case using a tube modulator needed an additional diode and resistor to maintain the modulator P-P load impedance when the negative cycle is being attenuated.

Jim
WD5JKO