[Elecraft] NG0R - K2+K60XV+XV144/222/432 - Setup Issue #3

[John Hoaglun]

Maybe this notes in the K60XV errata apply to this issue:

2. Using TUNE mode with the K60XV and KAT2 installed: If the KAT2 is in
either of its autotune
modes (A U T O or A LT ), and you’re on a transverter band configured
for LP mode (Low Power, 0 dBm),
holding TUNE drops power to 0.2 milliwatts maximum. You can override
this behavior by holding
D I S P L A Y along with TUNE, or by selecting any KAT2 mode other than
A U T O or A LT in the menu.

3. KAT2 modification for use with K60XV LP mode: In some cases the LM358
op-amp on the KAT2
can load down the K60XV's low-power RF detector (at the emitter of Q2),
preventing the K60XV from
developing a full 0 dBm (1 milliwatt) signal at the transverter OUT
jack. To correct this, change R6 on
the KAT2 from 47 ohms to 470 ohms. This resistor is supplied with the
K60XV kit. R6 is on the bottom
of the KAT2 control board, and can be changed without removing the KAT2
module.


Maybe Item #3 is the answer.  Thoughts?  I might try this after dinner.

73

-- 
John Hoaglun
NG0R - EN25
http://www.hoaglun.com



On Sat, 2010-08-21 at 19:30 -0500, John Hoaglun wrote:

> Another follow-up note/question on the transverter topic....
> 
> On the K2+K60XV when I set the radio (tran1, tran2, tran3) each to
> LP1.00 would expect that I should see a maximum of 1mW of power
> available.
> 
> When I actually measure that IF line I am only seeing about .50mW and
> the radio is typically showing something like "P .42 LP".  
> 
> Q: Should approx 1mW really be available?
> Q: If so, shouldn't the radio show something like "P  1.00 LP" or
> "P .95 LP"  ?
> 
> I realize that I am likely battling several issues on my setup. But I
> am feeling like my LP is only running about 1/2 the drive into the
> transverter than I am expecting. Starting out with the drive level
> that you expect seems like an important step.  :-)  I have an empty
> house this weekend so I was hoping to get the transverters up and
> running.
> 
> 
> Please CC me direct as I am a digest user.
> 
> 73
> -- 
> John Hoaglun
> NG0R - EN25
> http://www.hoaglun.com
> 
> 
> 
> 
>