[time-nuts] Advice on 10 MHz isolation/distribution (Clay)

[Bob Camp]

Hi

It's the one that Bruce posted earlier. Actually it showed up as a double post for some odd reason. I opened the whole "hybrid" thing by referring to it.

Bob


On Feb 12, 2010, at 11:32 AM, life speed wrote:

> Message: 3
> Date: Thu, 11 Feb 2010 23:02:30 -0500
> From: Bob Camp <lists at cq.nu>
> Subject: Re: [time-nuts] Advice on 10 MHz isolation/distribution
>     (Clay)
> 
> Hi
> 
> I suspect your noise spike can be cured by a series R-C to ground from the junction of Q1 base, Q7 base and all the other stuff. Something is going to have to set a high frequency roll off. With no coils some combo of R and C is going to have to do it. 
> 
> You might also try returning all of the upper emitter resistor bypasses to ground rather than B+. Another alternative would be emitter to emitter bypass as shown on the JPL schematic. I'm guessing both would improve isolation in a real world circuit. 
> 
> Bob
> 
> Hi Bob,
> 
> Please provide a link to the JPL schematic.
> 
> Clay
> 
> 
> 
> 
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