¿ªÔÆÌåÓý

  1. BITX20
  2. Messages
Single Messages Topics Expanded Polls

Re: Right-sided relay harmonic attempted fix for v3/4 ubitx

 

Gordon,

These spurs start from 0Hz and move up at the rate of 5x, 4x, 3x of the amount the display
changes with center is at multiples of 2.5MHz. Example 15Mhz everything almost vanishes
but at 14Mhz you will get spurs at 3Mhz, 4MHz and 5Mhz on either side of 15MHz.

At some points of the HF I get strong spurs between 0 and 5Mhz.. :-(

2.5Mhz is a common denominator somehow. The max spur spread occurs at 1.25MHz on
either side of these homing points.

Raj

At 29/08/2018, you wrote:

Is there some series resonance in the 80 meter LP filter at 24 MHZ, or why is that one harmonic so much stronger than others? Anyone have an answer?

Thanks,
Gordon
Join [email protected] to automatically receive all group messages.