[time-nuts] Distribution amp - Use a video amp unit ?

[Dave M]

> I need a distribution amp for my Tbolt , with 6..8+ outputs
>
> The TAPR-1 is NA , and the successor status is ???.
>
> I need it for distributing 10Mhz ref-clock to Counters
> (HP,Racal,Phillips), a Rigol Sig-gen & maybe Oscilloscopes etc.
>
> It's for "better than ocxo/hobby use" , and not Tnut (ps accuracy).
>
> I have seen suggestions for using a video distributiution unit.
> But in my part of the world (EU) , there isn't a lot on "eby".
> I have seen some RGB amps , and was wondering if i could use those ?
>
> Could i use a 1:6 RGB unit for : Tbolt on R , FEI-5680A on G  - and
> ?? on
> B ?
>
> I'm not experienced (yet) in the analog domain.
>
> If i go (simple diy) Would this one work  (also wo. the trafo's) ?
> http://www.oz9fw.dk/PDF%20files/rubidium.pdf
>
> I do have some trafo's on an old 10Mhz 8-chan Hub , that i might be
> able
> to salvage if needed.
>
> Thanx for any input/hints
>
> CFo - T-Nut beginner Denmark.

I have a couple Extron ADA-3-80 RGB video distribution amps that I use for 
10 MHz distribution, and they work well for me.  I send my 10MHz standard to 
a number of bench instruments, which seem to be quite happy with it.  They 
are 75 ohm units (for video); you can use them as-is or change the source 
resistors inside the unit to 50 ohms if you wish.  Gain is switchable 
between 1:1 and 1:0.7.  The gain is somewhat adjustable.internally.  Noise 
is pretty low.
They come up on ebay fairly frequently, and at reasonable prices.  Didier 
(KO4BB) has a page describing his experience with the Extron unit at 
http://www.ko4bb.com/ham_radio/Extron_3_80/.

Cheers,
Dave M
A woman has the last word in any argument. Anything a man says after that is 
the beginning of a new argument.