Electronics > RF, Microwave, Ham Radio

Teardown: Siemens Hilfssender (auxiliary transmitter), microwave tube based

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wkb:
On yesterday's hamfest over in Rosmalen (NL) I obtained a rather interesting piece of kit.  It calls itself Siemens Hilfssender. Or: auxiliary transmitter, built by Siemens of Germany.

It has a microwave tube, an adjustable cavity (from what I now know), it is built from silver plated brass, it weighs a ton and is testament to the proverbial Deutsche Grundlichkeit. I think it is for use around 2.4GHz (assuming I interpret the readout correctly that corresponds to the
tuning of the cavity).

I am really curious if one of the EEVbloggers has any clue what this puppy belongs to?  I also wonder about it having only one RF connection? Oscillator?  I cannot find a partnumber on the tube unfortunately.

wkb:
Partnumber badge

On the bottom the adjustmet axle, with the frequency readout scale

wkb:
on the side is a pickup for the RF sticking in the cavity (detailed picture follows)
The axle at the bottom allows adjustment of the cavity

wkb:
Screw-on cap for access to the tube

And the cap itself, with strong spring

wkb:
Once the cap is removed the tube socket becomes visible.

With the side cap on the cavity removed

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