“Off the Shelf” Regen Receiver

  Рет қаралды 620

SolderSmoke

SolderSmoke

Күн бұрын

Walter KA4KXX spotted an error in the schematic of my 2014 "Off the Shelf" regen receiver: The source resistor on the MPF-102 should be 2200 ohms, not 2.7 ohms. See:
soldersmoke.bl...
Walter's e-mail caused me to take this old receiver off the shelf. In this video you can listen to it in action on the shortwave broadcast bands. In a second video I put it on the 40 meter ham band and listen to some SSB.

Пікірлер: 6
@propagating-radio
@propagating-radio 4 ай бұрын
You’re an RF wizard Bill. I’m always amazed with what you build.
@Circuit6040
@Circuit6040 4 ай бұрын
So Bill, was the error only on your Schematic, or did you actually have a 2.7 ohm resistor wired in? 73 - Rick - N3FJZ
@soldersmoke
@soldersmoke 4 ай бұрын
Rick: It was a schematic error, as Walter suspected. Upon inspection (after taking it off the shelf!) I found a 2.2 k ohm resistor (red-red-red) from source to ground. 73 Bill
@trcwm
@trcwm 4 ай бұрын
Nice Bill! How was the performance before the resistor swap? 73 de PA1DSP
@soldersmoke
@soldersmoke 4 ай бұрын
There was no resistor swap -- the error was just a mistake in my drawing of the schematic. I always had a 2.2 k ohm resistor at the source. 73 Bill
@trcwm
@trcwm 4 ай бұрын
@@soldersmoke could it be that the 560 ohm base-gnd resistors of the two AF AMP transistors are actually 5k6? The biasing doesn’t work with 560 ohm. 🧐
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