[time-nuts] Racal Dana 9478 frequency distribution system with option 04B high stability oven (5x10^-10/day aging rate).

Dr. David Kirkby drkirkby at kirkbymicrowave.co.uk
Sun Nov 4 09:05:44 EST 2018


On Sun, 4 Nov 2018, 11:51 David C. Partridge <david.partridge at perdrix.co.uk
wrote:

> FWIW it is trivial to modify these video distribution amps for 50 ohm
> output - you just need to change the output resistors form 75 ohm to 50 ohm
> on the board after the op-amp.
>
> David
>
Three was a discussion about the particular video amplifier here some years
back, as they were on eBay and someone on this list made us aware of it.

Part of the discussion was converting to 50 ohms, but someone pointed out
it was pushing the limits of the op-amp.

But I don't like the form factor of the unit either.

I have for some time looking for another distribution amplifier, but I was
offered this at £150 including delivery. I think I will take it.

Dave.


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