XV-144 bandwidth

[srife]

        I have a question about setting up the K2 "RF" value in the menu
setting "trans2" for the XV-144. The K2 manual nor the XV manual state
anything about a specific setting. On initial power up the K2 freq readout
was indicating 38xxx.xx. I went in the "trans2" settings and set the "RF"
setting for 145, the center of the band. Is this correct? And after setting
the RF value, I still had to do a direct entry of 145000 to get the readout
on the K2 to indicate this frequency.

        I am confused by all this. Can someone clue me in on the procedure
to set the RF value correctly? And do I need to go back through the
alignment again? I noticed that the power starts dropping off around 144200
at the low end, and 145500 at the top end of the band. Shouldn't I get full
out put across the bandwidth of the unit? I feel like I have set it up
improperly and am not getting best performance. I get full power out at the
center of the band, and I have it set back to 10 watts maximum out to drive
my old Mirage B1016 amplifier.

        Also, as I tune toward the band edges, the gain seems to diminish as
indicated by a loss of noise from the speaker.

Stan Rife
W5EWA
Houston, TX
K2 S/N 4216
 

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[Michael Jensen]

Hi Stan

If i have got it right in my setup, that seems to work ok in the VHF contest
in Denmark, you need to specify what the K2 display should show when the K2
are on the freq you have setup in IF setting. Ie if 28 Mhz are set in IF
setting and and 144 in RF setting. The K2 will show 144 when running at 28
MHz to/from the XV144. That is how mine are set up.  Spec on XV144 say input
freq from 28-30 Mhz.
The rolloff you see is not new to me. I have had fun with that as well. I
have asked here some time ago. Clearly the issue are the preformances of the
28 Mhz band. If you check there you will proberly see the freq roll off as
you approach 29 Mhz Or in my case quite much before that. As I understood
from the answers here. That is quite normale.

Br

Michael








----- Original Message -----
From: "Stan Rife" <[hidden email]>
To: <[hidden email]>
Sent: Wednesday, November 22, 2006 5:05 AM
Subject: [Elecraft] XV-144 bandwidth

> I have a question about setting up the K2 "RF" value in the menu
> setting "trans2" for the XV-144. The K2 manual nor the XV manual state
> anything about a specific setting. On initial power up the K2 freq readout
> was indicating 38xxx.xx. I went in the "trans2" settings and set the "RF"
> setting for 145, the center of the band. Is this correct? And after
> setting
> the RF value, I still had to do a direct entry of 145000 to get the
> readout
> on the K2 to indicate this frequency.
>
> I am confused by all this. Can someone clue me in on the procedure
> to set the RF value correctly? And do I need to go back through the
> alignment again? I noticed that the power starts dropping off around
> 144200
> at the low end, and 145500 at the top end of the band. Shouldn't I get
> full
> out put across the bandwidth of the unit? I feel like I have set it up
> improperly and am not getting best performance. I get full power out at
> the
> center of the band, and I have it set back to 10 watts maximum out to
> drive
> my old Mirage B1016 amplifier.
>
> Also, as I tune toward the band edges, the gain seems to diminish as
> indicated by a loss of noise from the speaker.
>
> Stan Rife
> W5EWA
> Houston, TX
> K2 S/N 4216
>
>
> _______________________________________________
> 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
>
>

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