[Elecraft] Follow up on KX1 Field Ops

[Walter Underwood]

Electric fences can make a lot of RF noise.  --wunder, K6WRU

On Aug 22, 2013, at 10:38 AM, Bill Gerth wrote:

> Phil,
> 
> The electrical noise might have been a 12VDC to 120VAC inverter or perhaps a bug zapper.  Just a guess.
> 
> 73,
> BILL GERTH, W4RK
> Jefferson City, MO
> First Licensed 1954
> CWOPS #459
> 4 States QRP Group
> KX3 (S/N 112)
> 
> On Aug 22, 2013, at 12:23 PM, PHILIP GRAITCER <pgraitc at me.com> wrote:
> 
>> Last week, I asked for the group's help when I was in the field with a KX1 and an antenna that wouldn't tune. Here's my report.
>> 
>> I trimmed the 66' wire that I have used as an End Fed Half Wave (with other rigs and tuners) to 41 feet, added a 15 foot counterpoise, and the rig tuned just fine.
>> 
>> I was unable to do anything about the input voltage, since I lacked a coax jack that would have let me feed in 12 volts, instead of the internal 9v from the Lithium AA cells. So the power remained at about 1.8-1.9Watts. SWR was below 1.5, according to the KX1's display. I had left the 3S Lithium battery pack at home partly out of laziness, partly because of my fears of losing it in airport security.
>> 
>> I did make a few contacts, so - mission accomplished.
>> 
>> I did experience unusual QRM in a campgound in rural Montana on 40 meters. It sounded like a switching power supply - and it was across the entire band. Mostly steady, although it did stop now and then. I thought it might have been a generator from a nearby RV but couldn't hear one going. Any ideas what kind of electric interference that might be generated from nearby campers? There was a mix of RVs and tent campers at the campground. I was in a tent. 
>> 
>> Lastly, are there any mods to the KX1 that might get it to 5 watts if I put a 12v supply on it? I did the mod suggested by Elecraft, but the best I can get is around 4 watts with a 12V. I do get that on all bands.
>> 
>> I'm in upper Michigan this week. This time with my 12V 3S Lithium battery. Keep a listen out for me!
>> 
>> Thanks,
>> Phil, W3HZZ
>> ______________________________________________________________