[Elecraft] K144XV

[Harry Yingst via Elecraft]

I just tested mine into a dummy load
at 144 I get 7 watts and 148 I get 8 watts





      From: Edward R Cole <kl7uw at acsalaska.net>
 To: Elecraft at mailman.qth.net 
 Sent: Friday, October 3, 2014 1:30 PM
 Subject: Re: [Elecraft] K144XV
   
Harlan,

I was waiting to see if anyone from Elecraft would respond before 
replying.  I use a different transverter for 2m but the situation is 
the same using the K3.  RF output appears to drop quickly above 
30-MHz when in the transverter mode though receive seems functional 
to 32-MHz enabling receiving the entire 4-MHz 2meter band.

At 146.52 (K3=30.52 MHz) my 50w 2m transverter will only output 8w 
because drive drops to minimum.  This is too low for me to operate in 
the FM repeater sub-band of 2m as all but one repeater are > 65 miles 
from me.  Typically takes 25w to have a full-quieted signal thru 
these repeaters.

 From what I understood in communication with Elecraft this is a 
hardware limitation with no fix.  That is the bad news.

The good news is the KX3 suffers no power drop off over the whole 
2meter band with the new 2M module.  3w drives my "little" RFS 2-23 
amp to 30w which is adequate for my FM needs.

If I need more power the 30w drives my RFC 2-317 to 150w, and if that 
is not enough 55w out of the RFC 2-317 will drive my 8877 to 
1400w.  Of course I do not use the 8877 with repeaters else they 
"melt down" :-)  I usually run my K3 with the 8877 via the 50w 
transverter for ms/eme.

73, Ed - KL7UW

-----------------------
Subject: [Elecraft] K144XV
Message-ID: <tpinkyybba4q901cgs6do76g.1412293242257 at email.android.com>
Content-Type: text/plain; charset=utf-8

Finally got around to installing this in my K3.
There seems to be a large difference in output power vs input power 
when transitioning across the 146.000 threshold. ?
Below 146, 0.5mW drive gives 6 out. Above 146 it only gives 2 out. 
And swr does not change. Ideas?

Harlan
NC3C


73, Ed - KL7UW
http://www.kl7uw.com
    "Kits made by KL7UW"
Dubus Mag business:
    dubususa at gmail.com

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