Re: Fix for Spurs and Harmonics on V3 Board

Curt
 

Dale

Yes remnants of many experiments here on this list. Those axicom relays may get your harmonics compliant or very close. Watch pinouts before you put them on the underside, they should work okay on top side. Some added the shielded inductors on the 45 MHz crystal filters, and obtained lower mixer spurs in conjunction with those axicoms. The v5 LC filter did nothing to improve mixer spurs on my v4.

That trap idea was difficult to tune even with a spectrum analyzer, so hence came the shielded inductors.

Curt

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