[time-nuts] RF mixers for oscillator characterization, some questions
magnus at rubidium.dyndns.org
Mon Apr 20 01:15:23 UTC 2009
Bruce Griffiths skrev:
> Hej Magnus
> Magnus Danielson wrote:
>> Hej Bruce,
>> Bruce Griffiths skrev:
>>> Hej magnus
>>>> Yes. But looking more closely on them, they look like RF chokes, such
>>>> that common mode is suppressed. Having an RF choke there, loading it
>>>> with a resistor seems reasonable, as it needs to be loaded even for
>>>> lower frequencies to be useful.
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>>> Do you mean a common mode choke with a common mode termination or
>>> perhaps a Guanella balun?
>> It's a common mode choke. I had to look very careful at the windings.
>> What I think is resistors could also be inductors, but I kind of doubt
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> Can you post an image so we can all have a guess?
It's not that easy to get everything into one picture, sveral is needed,
besides the fact that the PCB is double-sided. The cores is fairly smal
and the rubber fittings that holds them makes it harder to take a good
photo. It takes time to make quality photos that is useful for the purpose.
I'll see what I can do, but I think I would prioritze other things.
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