K3-Hardware agc mod and S-meter cal

[GW0ETF]

Have an early K3 here and have just done the hardware agc mod, spurred on by cqww ssb a fortnight ago :-)

Mod went super smooth but am wondering about the recommendation to recalibrate the s-meter; is it just a precaution or is the s-meter guaranteed to be out after the mod? Seems pretty close to me from a quick and dirty before/after check with a stable DDS signal source but don't have a proper calibrated sig gen to hand.

I'm not an 'S-meter slave' but wondered if I should check it when I have the opportunity....

73,

Stewart Rolfe, GW0ETF (K3 #145)
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[Dave, G4AON]

Stewart I have a fairly good signal generator and didn't give it a
second thought as to whether doing the HAGC mod to my early K3 (serial
80) would change the S-Meter. However, the meter does calibrate nicely
and is accurate when calibrated. I've not re-checked the calibration
recently, but for what it's worth these are my settings:

SMTR OF: 016
SMTR SC: 017
SMTR OK: OFF
SMTR MD: nor

73 Dave, G4AON
K3/100 #80
----------------------------------
Have an early K3 here and have just done the hardware agc mod, spurred
on by cqww ssb a fortnight ago :-)

Mod went super smooth but am wondering about the recommendation to
recalibrate the s-meter; is it just a precaution or is the s-meter
guaranteed to be out after the mod? Seems pretty close to me from a
quick and dirty before/after check with a stable DDS signal source but
don't have a proper calibrated sig gen to hand.

I'm not an 'S-meter slave' but wondered if I should check it when I have
the opportunity....

73,

Stewart Rolfe, GW0ETF (K3 #145)
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[drewko]

Did you post these settings a while back? I know someone did, because
I had copied them into my K3. Only, I have them reversed: 017 and 016
respectively for the first two. It would be interesting to see what
others who are able to do the calibration come up with for these
settings.

73,
Drew
AF2Z


On Sat, 08 Nov 2008 11:26:51 +0000, Dave, G4AON wrote:

>Stewart I have a fairly good signal generator and didn't give it a
>second thought as to whether doing the HAGC mod to my early K3 (serial
>80) would change the S-Meter. However, the meter does calibrate nicely
>and is accurate when calibrated. I've not re-checked the calibration
>recently, but for what it's worth these are my settings:
>
>SMTR OF: 016
>SMTR SC: 017
>SMTR OK: OFF
>SMTR MD: nor
>
>73 Dave, G4AON
>K3/100 #80
>----------------------------------

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