[Elecraft] VCO Alignment on K2 7109

[EMD]

Don,

I did as you suggested and now have the voltage set to 6 volts at 
4000kHz.  I will check each band as well.

Thanks for your help!

73,
Ed KE7HGA

On 6/4/11 10:51 PM, Don Wilhelm-4 [via Elecraft] wrote:
>   Ed,
>
> You seem to have run out of adjustment range on L30.
>
> You will have to change the turns spacing on T5 to produce a voltage at
> R30 that is within range.
>
> Since your R30 voltage is 8 volts, when tuned to 4000 kHz, tune to a
> lower frequency so that the voltage is something less than 8 volts.
>
> Once you have done that, alter the spacing on T5 to reduce the voltage
> even further - adjust until the voltage is at something like 5.5 volts -
> then adjust L30 to bring it up to 6.00 volts when tuned to 4000 kHz.
>
> Once the R30 voltage is set at 4000 kHz, check the ends of each band to
> be certain the voltage is within range for all bands.  If it is not, you
> may have a capacitor problem in the VFO Range Select area (ask about
> that problem specifically).
>
> 73,
> Don W3FPR
>
> On 6/4/2011 10:09 PM, EMD wrote:
>
> > All,
> >
> > I have mad it to page 64.  When I check the volts at R30 using my 
> DMM I get
> > 8 volts. I assume that the left side of R30 would be having the 
> front of the
> > radio facing me so the lead I tested was towards adjacent the side 
> panel.
> > It did drop to 7.5v but at that reading the L30 was at what appeared 
> to be
> > it's maximum travel limit toward the top of the can.
> >
> > I searched the reflector and have found that I have 4.0 volts at U6 
> pin 5.
> > I have 16 turns of red and 4 turns of green wire on T5.  When I 
> decrease the
> > frequency from 4000kHz the voltage does drop.
> >
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