[time-nuts] IC for 1 PPS Output

Normand Martel martelno at yahoo.com
Fri Apr 7 06:59:40 EDT 2006


Even more "El cheapo" (and also more ailable from your
spare parts drawer):

A fast hex inverter (74F04/74HCT04 etc...) wired in a
1-5 configuration (one input inverter driving five
output inverters) and then having each of the five
output inverters driving a separate 240 (or 220) ohm
resistor (keep the leads short). Then, simply connect
the five 240 ohm resistor unused leads together and
BINGO! You have a 50 (ok, 48 ohm!!!) driver! And
having 240 ohm to drive, the inverters are not
overloaded.

73 de Normand VE2UM


--- "Hans H. Jucker" <hhjucker at ggaweb.ch> wrote:

> Dear Robert
> 
> You can either drive from A to B with the world
> finest German Maybach car
> or also with a British Mini Cooper. May be the
> SN74128 50ohms coax-cable
> driver is rather matched for this simple application
> !
> 
> Regards
> 
> Hans
> 
> 
> 
> 
> 
> _______________________________________________
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> time-nuts at febo.com
>
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> 


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