[time-nuts] Double balanced mixer question

[Richard (Rick) Karlquist]

Are you filtering out the 10.000001 MHz image?

Rick N6RK

On 7/23/2020 11:01 AM, cdelect at juno.com wrote:
> Hi,
> 
> I'm feeding 5.0 MHZ and 5.000001MHz into an HP10514A mixer.
> 
> A buffer and a 12dB attenuator feed each input and a 50 Ohm buffer amp
> (10Mhz) is on the output.
> 
> I get a nice sine output but get the 1Hz as amplitude variations.
> 
> Playing with input levels I can minimize the variations but the best I
> can get is a 3.2 V P-P with a .4 V P-P amplitude modulation.
> 
> Are there mixer schemes I can use that will eliminate the amplitude
> variations?
> 
> Cheers,
> 
> Corby
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