[time-nuts] high rev isolation amps

John Ackermann N8UR jra at febo.com
Sat Mar 26 22:33:59 EDT 2016


When I looked at the Wenzel amps, they were extremely low noise, but the 
isolation was nothing to write home about.

On 03/26/2016 08:20 PM, John Miles wrote:
>
>> I'm looking for off the shelf connectorized amplifiers with very good
>> reverse isolation for doing things like intermod measurements (e.g. 2
>> signal generators followed by amps/pads into a combiner) and phase noise
>> measurements for a digital receiver.
>>
>> 1-100 MHz kind of frequency range..
>>
>> I've used ZFL-500LN (30dB gain, 27 dB directivity in the data sheet,
>> which I interpret as 57dB reverse) , ZX60-4016 (really more of a
>> microwave amp, and not so hot reverse wise.. 25 dB)
>>
>> I'm not particularly cost constrained, so a higher power amp (which also
>> reduces distortion products from the amp) followed by pads is always an
>> alternative.
>
> Lots of options at http://www.spectradynamics.com, also see the LNDA series at http://www.wenzel.com.
>
> -- john, KE5FX
> Miles Design LLC
>
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