[Elecraft] K3 H-Mode Mixer Main & Sub RX plus other mods

[Geoffrey Mackenzie-Kennedy]

Hi Gian,

Did you find that your diplexer termination for the filters also prevented 
the changing input impedance of HAGC controlled amp Q1 from changing the 
Group Delay Variations of the filters, especially the narrower filters?

My apology for not replying to your last email, will explain off-list.

73,
Geoff
LX2AO



On May 14, 2012 at 21:57 +0200, Giancarlo Moda wrote:

<snip>


> Following K3 owners request, a mod relative to a diplexer termination fot 
> the xtal filters bank is available. This is made to reduce filters IMD due 
> to change of impedance of the
> HAGC Q1 amplifier.