[Johnson] Viking Invader Exciter Output - happy ending

Thu, 6 Feb 2003 12:25:33 -0800 (PST)

Scott,

 Thanks for data - that was the info I needed. 

 I already had done an "alignment" per the manual. I wasn't all that impressed
by the instructions. Kind of vague in all the wrong places. Especially on T2
with references to voltage which as far as I can tell are practically
meaningless in conext of actually getting the radio working. 

  However, even at 30 watts, the audio in USB,LSB and DSB sounded good. But the
power was still the issue.

  I checked all the tubes after the balanced modulator - again. All good.

 Stumped, I hooked the exciter output to a dummy load, powered it up and
decided to take a dive.

  Powered the unit up in CW on 80, still 30 watts out. I tweaked the top core
on T2 - up it shot to 60+ watts. I then turned the unit on the its side and
peaked the bottom core - bang! up to 110 watts it shot. I did'nt think the
plate meter would ever move over that far!

  I'll go back and check ineraction on the other bands but for right now I got
it where it needs to be.

 TNX AGN 
 73
 de KA4JVY
 Mark

--- Scott Prather <[email protected]> wrote:
> Mark-I have an Invader 200, not the 2000, and after an alignment it easily
> puts out 100W on all bands but 10, where it drops to 80W or so.  Check the
> output power on 40 M.  If it's considerably higher than on 80, the most
> likely cause is alignment of the inductors used for exciter tuning (there's
> a step in the alignment that verifies this adjustment on 80M).  When I first
> bought my Invader 200, the output was about 3 dB lower on 80M than on the
> other bands.  If you go through an alignment, I highly recommend that you go
> through the entire procedure in the order listed in the manual.  Some of the
> adjustments interact more than you might expect.
> 
> Scott
> N7NB
> 
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Mark Foltarz
> Sent: Tuesday, 04 February, 2003 08:46
> To: [email protected]
> Subject: [Johnson] Viking Invader Exciter Output
> 
> 
> 
> 
>   Wondering if anyone has measured the output power of the exciter in a
> Viking
> Invader 2000.  I measure about 30 watts out CW on 80 meters. A little low?
> 
>  TNX
>   de KA4JVY
>  Mark
> 
> 
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