[Elecraft] #4472 transmitter setup problem.

[W3FPR - Don Wilhelm]

Jerry,

The variation in power when holding TUNE is not unexpected - it is due to 
the transmit ALC settling out.  Yes, the power out is just what the display 
says, but it will settle down after several presses of the button.  Not 
something to be concerned about.  In normal operation, the power out will 
settle down after an initial dash (or about 3 dots) - the ALC resets after a 
power request change or after a band change.

The real concern should be the low power output and the HI CUR indications.
Check T1, T2 and T4 carefully for the correct number of turns.  The 
secondary winding on T1 and T2 should look just like the diagram in the 
manual - this is especially true for T2.  Also, T2 should be mounted a bit 
above the board for best performance on the higher bands - 1/16 to 1/8 inch 
is fine, and yes the leads will support it just fine.

If you continue to get HI CUR indications, also check the Low Pass Filter - 
check the capacitor values and especially the toroids for the correct number 
of turns.  When counting turns on a toroid, remember to count the turns 
going through the center of the core - you can easily be off by one turn if 
you count the loops on the outside.

Finally, check soldering, then recheck soldering, and when that is complete, 
double check the soldering!!!

73 and Happy Thanksgiving,
Don W3FPR

----- Original Message ----- 

>I am now doing my transmitter alighment, page 75,  and have a have run into 
>a problem with it.
>
> On 40 meters when I set the power to 2 watts and press and hold the tune 
> button the power out shown is abt 2.5 on the first hold of tune,  if I do 
> it a second time it comes up abt 2.6 and then if I do it a third time it 
> comes up correct about 1.9.   The cycle contines, it seems that about 
> every three times I press tune I get 1.9.
> The same goes for 5 watts ( 5.8, 6.0 and 4.9) and 10 watts (11.2, 11.4, 
> 9.8).
> The currents look ok,   2 watts @ 1.28a,   5 watts @ 1.7a and 10 watts @ 
> 2.2a (give or take a little depening on the power out.
>
> On 80 meters it's doing  the same.
>
> On 20 meters 2 watts is doing the same, but I get hi current  5 watts and 
> above.
>
> On 15 meters Hi curret on  all 2, 5 and 10  watts.
>
> On 10 meters , the same but here I get max out of only 4.9 watts.
>
> The rf out looks good on a scope.        Dummy load is ok,  SWR 1:1. 
> I've had a few cw contacts so far.    It's a basic K2.
> Has anyone comes across and any ideas?
>