[time-nuts] Distribution amplifier for 10MHz and 1 pps

[Stephan Flor]

I modified a analog video distribution amp.  Worked well. Changed the impedance by changing resistors at the outputs. I put my True Position GPSDO in the case, along with a power supply and microcontroller, and LCD display. I used the R-G-B outputs for 10MHz, and the digital audio for the 1PPS outputs.  I have eighteen 10 MHz outputs, and six 1 PPS output.  I used a EXTRON DA RGB/YUV SERIES WIDEBAND DISTRIBUTION AMPLIFIER DA6 YUV A,  it was $20 on Ebay. Works good. I can synchronize all my instruments. I think having more outputs than you need leaves room for future expansion.Steve
    On Saturday, March 16, 2019, 2:04:17 PM MST, Attila Kinali <attila at kinali.ch> wrote:  
 
 On Sat, 16 Mar 2019 18:01:36 +0000 (UTC)
Taka Kamiya via time-nuts <time-nuts at lists.febo.com> wrote:

> But how do I do this on 10MHz side?  I'd like to have minimal distortion 
> (sine wave) and high isolation.  I acquired a few signal splitter and 
> monolithic amplifiers.  Split first and amplify?  Amplify first and split?  
> Remember it's only 2 to 3 channels.  Amplifier module has too much gain, so 
> I'll probably have to use attenuators.

Amplify - split - amplify.

The first amplifier is there to compensate for the loss of the splitter.
You might want to add additional attenuators between the splitter
and the output amplifiers for increased isolation between channels.

> Have anyone run into this kind of thing?  Is there an existing design?  
> Anything anyone would like to share?

Anders Wallin has a design that seems to work very well:
http://www.anderswallin.net/2017/01/frequency-distribution-amplifier-2017-01/
(His blog is worth watching, he does some very nice electronics)

            Attila Kinali

-- 
<JaberWorky>    The bad part of Zurich is where the degenerates
                throw DARK chocolate at you.

_______________________________________________
time-nuts mailing list -- time-nuts at lists.febo.com
To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.