[TenTec] ORION II and Elecraft P3 panadpter?

[Jim Brown]

On 4/29/2012 5:21 AM, David Perrin wrote:
> Can anyone redirect me to the location to pick off the i.f.? One side of the signal is ground which I have taken on the outside circuit trace around that area on the board.

Ground is not ground is not ground.  There is considerable inductance 
reactance at 9 MHz between where you're trying to pick up signal and the 
chassis. The RIGHT way to do this to run coax between where you're 
taking the signal to a chassis mounted connector,  connecting the shield 
to common on the circuit board close to where you've taken the signal. 
Then run to the P3 from that chassis-mounted connector.

If you open up a Ten Tec amp, you will see exactly this technique for 
both input and output.

73, Jim K9YC