alignment, part 2

[wd4lst]

I have a couple of questions about the second stage k2 alignment. First is the VCO -
Initially, I could only get the voltage at R30 down to about 6.3v with the vfo at 4Mhz. After diddling with t5 winding spacings, I was able to get the 6.0 with some wiggle room in the adjustment (L30 will adjust down to ~5.75v). With the 4Mhz  R30 reading set to 6v, the R30 voltage for 7.0Mhz was about 1.3v, with all others in range compliance.
In order to get the 7Mhz reading up to 1.6v, L30 was readjusted so that the 4Mhz reading is now 7.0v, with all other vco readings spanning from 2.44v to 4.54v. This does fall within the guidelines, but not comfortably.
Also, the BFO range was 3.88 kHz - again, sort of close to the minimum.
Does all sound ok, or is something marginal and going to haunt me down the road?
This having been said, after finishing the stage 2 steps, this guy sounds awesome on 40-wow!!
I was able to use my xg2 on 1uv with the AT1 in line at full attenuation. I'm fired up to move on and get this on the air!! Guess I am looking for a condidence check.
Thanks for any input.
-Pete
K1 2194
K2 5813 (in progress)


Pete Axson
WD4LST
17901 NE 18th Ave
Citra, FL 32113

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Don Wilhelm-3]

Pete,

While your VCO voltage range is within spec, it may be worthwhile to make
some checks of the capacitors in the VFO range Select area (see the
schematic for the capacitors).  The Schematic Key has a chart of the
capacitors that are used on each band.  Of particular interest is the value
of C72 for 80 meters.

If the L30 tuning range is either at the bottom or top of the slug travel,
you can adjust the turns of T5 to bring the tuning of L30 closer to the
midpoint.

Since your BFO range is just barely above the minimum, be certain that the
high and low frequencies are correct - that is more important than the
range.

Other than those checks, it sounds like you are good to go.

73,
Don W3FPR

> -----Original Message-----
>
> I have a couple of questions about the second stage k2 alignment.
> First is the VCO -
> Initially, I could only get the voltage at R30 down to about 6.3v
> with the vfo at 4Mhz. After diddling with t5 winding spacings, I
> was able to get the 6.0 with some wiggle room in the adjustment
> (L30 will adjust down to ~5.75v). With the 4Mhz  R30 reading set
> to 6v, the R30 voltage for 7.0Mhz was about 1.3v, with all others
> in range compliance.
> In order to get the 7Mhz reading up to 1.6v, L30 was readjusted
> so that the 4Mhz reading is now 7.0v, with all other vco readings
> spanning from 2.44v to 4.54v. This does fall within the
> guidelines, but not comfortably.
> Also, the BFO range was 3.88 kHz - again, sort of close to the minimum.
> Does all sound ok, or is something marginal and going to haunt me
> down the road?
> This having been said, after finishing the stage 2 steps, this
> guy sounds awesome on 40-wow!!
> I was able to use my xg2 on 1uv with the AT1 in line at full
> attenuation. I'm fired up to move on and get this on the air!!
> Guess I am looking for a condidence check.
> Thanks for any input.
> -Pete
> K1 2194
> K2 5813 (in progress)
>

--
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.432 / Virus Database: 268.16.3/614 - Release Date: 1/2/2007
2:58 PM

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com