[MRCA] WS-19 Modulation

[mstangelo at comcast.net]

Ray,

Good luck with the WS-19.

That was my first surplus set. My uncle bought the package from a department store after the war and stored it in the attic of our house. My grandmother owned the house at that time.

In the 1960's my cousin and I were teens so my uncle took it down and gave it to his son. It was a complete package with the transceiver, dynamotor, variometer, antenna, mic/headphone sets, junction boxes and cabling.

My cousin was more interested in audio that radio so I traded a tape recorder to him for the WS-19.

By that time we moved into our own home on Long Island and set it up in a barn on the property. I had a heck of a time building a power supply robust enough to run the dynamotor. I remember the rectifier diodes exploding as the dynamotor started running. I eventually got it running by hooking it up to the battery in my father's car.

Anyway the tuning was tricky and I eventually traded it for command sets which were lighter and had finer tuning.

Good luck with the set. I remember there was a capacitor in the dynamotor so don't forget to check that cap if you intend to power  the set with the dynamotor.

Mike N2MS



> On 06/09/2025 10:02 AM EDT Ray Fantini via MRCA <mrca at mailman.qth.net> 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