AVANTEK: YIG-Tuned Oscillator Part # ASF GHz. $ Buy It Now. or Best Offer. 2 watching. AVANTEK:Part #ASF YIG-Tuned Oscillator . Avantek: Avantek Octave Band Series YIG. Identifier avantek_Avantek_Octave_Band_Series_YIG. Identifier-ark ark://tk7g . I have a couple of AVANTEK YIG oscillators, models SF6- and AVM Both are 2 – 4 GHz units. None of the oscillators have their pins.

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Mystery YIG Oscillator

These do require a good amount of power, magnetic coils, etc, but provide stable and rather low noise output, and good modulation capability. Core element is a small YIG sphere, placed in a magnetic field. However, for the current unit under investigation from a GHz frontendtype S, 8. Knocking it with a small! Varying the coil current — no effect.

Current consumption on the 15 V rail is normal. Well, with all the basics checked, what to do with such hermetically sealed unit, other than using it to satisfy my curiosity about its internals.


Mystery YIG Oscillator – Doogie’s Blog

Hope to trace the defect to some specific part. This is possibly hig the side opening, which is usually welded shut, but can be avantsk up rather easily. To look inside, carefully removed the top weld seam on a lathe, and the you can pry the case open.

What you can see is pretty straightforward, despite all the gold wires. Voltage at the resistors is about 4. Also probed other parts of the circuit, with a thin wire, under the microscope.

The coil — rather, the coils. The thick wire is the main tuning coil, which accepts 0. This is for much lower currently but high bandwidth modulation.

All is sealed avantrk soaked with epoxy resin. Note the hand made labels which may explain the cost of these units if purchased new… looks like US style handwriting to me. Well, seems that fixing this is beyond what I can do here with the tools at hand. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment.


Micro Lambda, YIG oscillators, RF and Microwaves, UK

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A19 board, YTO unlock, bad precision trimmer s. Leave a Reply Cancel reply Your email address avanhek not be published. SimonsDialogs — A wild collection of random thoughts, observations and learnings.