[time-nuts] REF osc distribution.

[Rex]

A couple links on what Bob is referencing:

http://www.ko4bb.com/~bruce/IsolationAmplifiers.html

http://www.ke5fx.com/norton.htm


On 9/5/2012 9:46 AM, Bob Camp wrote:
> Hi
>
> There are a number of discrete transistor buffers that have very good
> isolation and short term stability / phase noise performance. I'd take a
> look at the one from the NIST papers and Bruce's more modern re-design.  All
> are in the archives. http://tf.boulder.nist.gov/general/pdf/498.pdf is a
> pretty good place to start.
>
> Mostly what they do is to run a common emitter amplifier followed by several
> common base amplifiers. They may or may not follow that with a buffer. Each
> channel gets a separate string of amplifiers. All the common emitter amps
> are driven in parallel by the reference source.
>
> The transistors used are normally cheap stuff like the 2N3904. Except for
> the power supply nothing in the circuit costs much. None of it is hard to
> find.
>
> Bob
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Rui Martins
> Sent: Wednesday, September 05, 2012 10:19 AM
> To: time-nuts at febo.com
> Subject: Re: [time-nuts] REF osc distribution.
>
> Bob and Paul,
>
>
>
> I have at moment 6 equipment's maximum which I want sync with 10MHZ only.
>
> The video distribution is an idea but the kit from Ve2zaz have other way but
> the problem is the isolation.
>
> I have 2 independent Nortel GPSTM but I don't need redundancy for the job.
>
> G3ruh and ve2zaz Kits and rubidium oscillators only for analyzing the data
> and compare.
>
> I will use one of them with a doubler to get 20MHZ for driving a transceiver
> (Crazy huh).
>
> Any ideas will be considered.
>
>
>
> Regards
>
>
>
> CT1EBH
>
> Rui Jorge Martins
>
> Proudly user of FT-ONE, FT-980, FT736R, FT726R, FT-2000 and FL-7000
>
> 73!
>
>
>
>