[Milsurplus] WS-19 Modulation

[bruce macmillan]

To increase the level of modulation the control unit #10 was designed. 
It goes between the set and the first regular control box. It uses the 
intercom amplifier to increase microphone levels. Although the #10 is  
not very common other people have modded regular boxes as a substitute. 
The No. 10 Control box is easy to replicate, just a switch and a few 
resistors. All it does is switch the output of the amp circuit into the 
mic circuit. It requires no mods to the set itself.

Bruce  M0SOE

On 09/06/2025 15:02, Ray Fantini via Milsurplus wrote:
>
> Picked up a WS-19 at Hamvention, it’s a basket case so have no 
> problems doing some modifications to it. Started by removing the VHF 
> set and am now in the process of replacing tons of capacitors and lots 
> of the old brittle wiring.
>
> The goal is to end up with a another low power AM transceiver that I 
> can run at events.
>
> In addition to the VHF junk that's been removed they also had an 
> intercom audio amplifier in the set and have been thinking of using 
> that to drive a speaker or better yet as a modulator for the 807 in 
> the PA. The existing circuit uses a grid modulation system but 
> wondering if anyone ever used the 6V6 in the intercom amplifier to 
> modulate the 807 as a plate modulated transmitter? figure maybe I can 
> find an old tube CB that I can take the modulation transformer out of.
>
> Ray F/KA3EKH
>
>
>
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