[Milsurplus] RAK/RAL Muting

[Hubert Miller]

Assuming you’re already grounding the RAL’s antenna input, what about opening the cathode circuit of its RF stage?
That might still not do it: the signal to the detector still might be too loud or too weak for a pleasant sidetone.

In that case,  and if you want to avoid a separate RF gain control for transmit condition, i’d still provide for opening the

cathodes, to suppress any sidetone, and use an RF powered audio tone generator for your CW sidetone. Which could

be a single transistor affair, very simple. 

-Hue Miller 

 

>Hi Ken,

I was trying this on 160M with just 100W. I was hoping to monitor my sending on the receiver, but the oscillator seems to lock onto the transmit freq like typically happens with an overloaded regen. It instantly recovers. I've tried setting the regeneration both right at the edge of oscillation and way beyond that. No change. I've replaced a leaky mica, and a handfull of resistors. All of the oil filled caps are original. I'm using the original power supply and cable. There are a few holes in the back of the cabinet I could try sealing up.

Thanks,

Chris

 

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