[Lowfer] Antenna Analyser Mod?

[Cliff Sojourner]

Hi, I did exactly that on my '259. Added 940mH to the lowest range.

Yes the oscillator now ranges from 250 to 550 kHz. But it is not stable at all, typically wobbling +/- 2 or 3 kHz. So not reliable enough to tune up an antenna at say 474kHz.

So now I'm looking at putting something together using a synthesized oscillator. Plenty of example projects in QST and QEX recently.

On January 12, 2018 10:15:17 AM PST, KD7JYK DM09 <kd7jyk at earthlink.net> wrote:
>On 12/14/2015 06:19, John Bruce McCreath wrote:  So, just rambling 
>here.... Do I do a mod with one L or two? Should I use a rotary switch 
>with multiple L and a 50 Ohm calibrate position or just adjust what's 
>already there?
>
>Played with my '249 a few days ago, adjusting L1, a 33uH coil, only 
>allows me to get down to 1,590 KHz.  Hoping to get down to 500 KHz for 
>what I'm doing, but will probably add multiple inductors to see how low
>
>I can go as I need to really get into this unit to fix/replace a bad 
>band selector switch as well.
>
>Kurt
>
>
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