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Im a bit on the bad side with hittite right now, when i was working at the big M i didnt have any problems getting samples from them but now its not as easy , they want me to buy the samples but then

I have tried running those YTOs past 10 GHz, and what happens is that they just stop oscillating beyond a certain point (about 10.3 GHz as I recall). If you bolt the oscillator to a good thermal sink

thanks for the datasheet, unfortunatly it doesnt give a max current for the coil, the part i have says 8.5-9.25GHz it tunes to 8GHz @ 150mA however i dont know if this is acceptable for long term

They're equivalent to these Endwave parts, as far as I can tell: http://www.ke5fx.com/stellex/MiniYIG.pdf The YTOs themselves are nice parts, but the popular synthesizer boards that use them are

Does anyone has a detailed datasheet of the stellex permanent magnet YTOs that are commonly offered on ebay ? im especially interested in the max current the coil can take without frying. Im in the

Thanks John! Best George hour chasing

They are very likely Sealectro or MicroDot. If you email me a (small ) pic of both M and F, off list, I'll see if I can ID them. If they are gold plated with Teflon insulation between center and

If you can email me photographs, I'll compare them to what's in my 8443A. But it doesn't really matter. The only important one for your present purpose is A6W1, the one from the RF amp to the

I did call them GOOFY because that is what they are. They are goofy because I think the only place in the whole world they were used was the jacks and plugs for the cables of the connections between

I didn't call them goofy, David Hallam (the OP) did. You and I are referring to what's more commonly called "Hybrid-D" connectors. (From context, I judge that David Hallam is thinking of the SMB

Sealectro is a brand. They made SMA, SMB, SMC, and a number of other miniature coax connectors. They ALSO made a number of proprietary types in addition to the standards. As to 'goofy', do you mean

I said that two sentences later: "At narrow RBW settings, you have to fine-tune the TG to be exactly on frequency, that's the screwdriver adjustment on the front panel. Since you don't know that

ONLY, if the TG is actually putting out the same frequency as the SA is tuned to. I have an AIL 757 and TG. If the tracking control is not tuned right, the YIG in the SA's front end will be tuned to a

Take a look at the Wiltrons. The advantage is that the marker accuracy is independent of the GHz/Volt calibrations. In fact, I have a little home brew unit in a Tek TM-500 PI that does just that...

FWIW, do it over a tray w/ turned up edges. I just spent over an hour chasing small bits of an assembly because I ignored that precaution. Best, -John g47g wrote:

They did call them by an obsolete name, "selectro" (or was it "sealectro"?).

usually HP used SMC and SMB on the inside of most instrument, i havent seen anything special in any of the HP Gear Dan Rae <danrae@...> wrote: David C. Hallam wrote: David if you

David C. Hallam wrote: David if you do look for another one, try to find a later one with LED displays rather than nixie tubes, they are a little bit more reliable. But they are pretty easy to work

Thank you to all who replied to my request for help. I now understand more about the operation of this piece of test gear and also believe the solution to my problem is more complex than I originally

Thanks. I'll try to disassemble the unit, then I hope I'll see the reason of the failure. <microwaveengineer1968@...> wrote: cam in place is missing