jason kit wobbulator W11

[CambridgeWorks]

I also have this wobhulator, as yet unused since purchase maybe 10 years ago.
Any info would be appreciated.
Thanks, Rob

[Ed_Dinning]

Hi Rob, I think this kit was covered in the Radio Constructor, in the 50's/ 60's and may even have featured on the cover

Ed

[CambridgeWorks]

Thanks Ed, will need to do a trawl when I have time on my main pc.
Rob

[Refugee]

I can remember there being a number of projects in several magazines in the mid 1970s.
They will not be the exact one you are looking for but may help.

[Mike Watterson]

And if all else fails and you have about €1200 to spare:
RIGOL DSA815-TG Spectrum Analyzer, 9kHz-1.5GHz, DANL: -135dBm, Phase Noise: -80dBc/Hz@10kHz Offset, RBW 10Hz, 1.5GHz Tracking Generator.

I gave away my wobbulator after I got it. If you set span to 0Hz the TG is a 19 kHZ to 1.5 GHz signal generator with 0 to -20dB level in 1dB steps. I have an external 0-70 dB attenuator that does 10dB steps. Obviously the TG is the "wobbulator" bit and the spectrum analyser means no detector needed. It also works as an AM or FM radio receiver with a headphone socket. The 3.2 GHz model is twice as expensive.

I did have an HP141T spectrum analyser that had plugins up to 10GHz, but it died I found the lack of a TG with it (though HP did have one for it), so I made a wide band noise generator using a zener, high pass filter to get it flattish and a cheap MAR6+ MMIC, all on stripboard. It's useful from several MHz to 900 MHz to see a filter, IF, or radio responcse using any spectrum analyser.

Years ago I made a basic fake one using a TV tuner from 42 MHz to 862 MHz, but the €15 USB TV sticks will do about 42 MHz to 1.2GHz at about 7 or 8 bits. Now people are selling more dedicated SDRs cheap that will work: "SDR Receiver Software Defined Radio SDR Radio Receiver 10KHz Up to 1GHz 12-Digit Full Band" about €38 inc shipping. I'm tempted to see what it's like using my noise generator instead of a tracking generator, which it can't easily use.
https://www.amazon.de/-/en/dp/B0BXSYK8P2/

I hope you find the Jason info, but there are other options now for aligning or testing filters.