[time-nuts] RF mixers for oscillator characterization, some questions

Bruce Griffiths bruce.griffiths at xtra.co.nz
Mon Apr 20 00:53:53 UTC 2009


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.
>>>
>>> Cheers,
>>> Magnus
>>>
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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
> it.
>
> Cheers,
> Magnus
>
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Can you post an image so we can all have a guess?

Bruce




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