[Elecraft] Low Power on 10 Meters

[Don Wilhelm]

Dave,

That is an excellent method of achieving a 1:1 SWR with an unknown (or 
questionable) dummy load.  Thanks for the reminder.  Just be aware that 
the SWR=1 condition is frequency sensitive - the tuner must be retuned 
if the frequency or band is changed.

73,
Don W3FPR

David Wilburn wrote:
> If all else is well, then consider how you are measuring it.  As Don has 
> pointed out before, the internal power meter expects a 50 ohm load. 
> After trying several configuration that showed 6w on 10m, I checked the 
> dummy loads.  All three were showing 1.2 swr with an analyzer.  I then 
> connected to my MFJ-949E with internal dummy load, and I connected so 
> that the manual controls were in line, and adjusted for minimum SWR 
> while hitting the tune button.  When I did this and used the internal 
> power meter, it showed 12w.
> 
> None of my measurement setups were perfect, I was mainly looking at the 
> spread of the readings.  But when I used the setup described above, all 
> my readings, on all bands, were above 12w.  When read with external 
> power meters, they fluctuated quite a bit more.
> 
> David Wilburn
> dave.wilburn at verizon.net
> K4DGW
> K2 #5982
> 
> 
> William M. Spaulding, SR wrote:
>> Folks,
>>
>> I'm having a real struggle getting 6 to 7 WATTS on 28 Mhz while all 
>> other all other bands come up with a number well in excess of 10 Watts.
>>
>> Has anyone experienced this problem and was able to solve it?  I'm 
>> suspecting low pass filters that are not coordinated to the 10 Meters 
>> Caps, if you can get my drift. I can't come up with a reason for 
>> this.  In fact, it may make 10 Meters useless for some modes.
>>
>> Help?
>>
>> Bill
>> NA7Y
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