[600MRG] 630 first WSPR in Europe

[Edward R Cole]

Emory,

Wow with only a few mw EIRP reaching Europe is very impressive!

I use my K3 running under a mw to drive a surplus 
100w NDB that I picked up for $40 about 2011.  I 
removed the dual frequency xtal oscillator stage 
and just drive the BP filter with a capacitor and 
resistor.  The NDB has three stages of 
amplification.  I figure EIRP about 4w with the 
old inverted-L.  I will have to model the new tee 
design to determine its efficiency.  I'm going to 
load the 50-foot tower as a folded unipole which 
may shift the impedance from what the inverted-L had.

73, Ed

At 10:06 AM 1/3/2021, WM3M wrote:

>Ed,
>
>The amp with my K3 puts out 150 watts more or 
>less, its the original one sold by K5DNL.
>
>WSPR output last night was 200 mw from the 
>QRPlabs U3A.  So actual EiRP from the antenna 
>was maybe in the single milliwatts, my very 
>rough guess would be about 6 milliwatts EIRP.
>
>73
>
>Emory  WM3M
>On 1/3/2021 1:44 PM, Edward R Cole wrote:
>>Interesting description.  Sounds a little like 
>>my (proposed) 630m antenna.  I had a 130 by 43 
>>foot inverted-L but the support on one end was 
>>damaged and wires dropped to ground in 
>>November.  The support was my 50-foot tower 
>>but it will only be 30-foot when I get it back next spring.
>>
>>I decided on a 130-foot Tee antenna made from 
>>my 80 dipole, center supported on another tower at 40-feet and ends at 30-feet:
>><http://www.kl7uw.com/630m.htm>KL7UW 630m Topics
>>
>>Emory, how much RF power does your amp 
>>run?  How much power was used on the Europe shot?
>>
>>73, Ed - KL7UW
>>
>>At 08:28 AM 1/3/2021, WM3M wrote:
>>>Content-Type: multipart/alternative;
>>>Â boundary="------------1985EDD6B3DB4C5B00629832"
>>>Content-Language: en-US
>>>
>>>Set up here, antenna - it started out as a 
>>>double size G5RV from Antennas and More, they 
>>>are out of business.  Center line is 300 
>>>ohm heavy duty TV line, each side fed to 
>>>number 12 wire direct.  Tree fell and broke 
>>>center support rope last winter, so center of 
>>>antenna dropped to about 40 ft.  Feed line 
>>>is somewhat vertical and some 
>>>horizontal.  Both ends of the feed line are 
>>>tied together at the variometer.  Short 
>>>coax run to the variometer.  Ground side at 
>>>variometer is fed to ground wires, rods, no 
>>>real radial system, just several ground rods and wire connecting them all.ÂÂ
>>>
>>>I tuned the variometer about a year ago, 
>>>checked couple days ago with antenna analyzer, 
>>>it was still good.  So antenna set up is 
>>>nothing special, just used what I 
>>>had.  Someday will try to get center of 
>>>G5RV back up higher in tree, but not an easy job.
>>>
>>>In addition to the QRPlabs U3S, also have a K3 
>>>with 630 amplifier, will use it to try and make 2 way.
>>>
>>>73
>>>
>>>Emory  WM3M
>>>On 1/3/2021 11:17 AM, Gedas wrote:
>>>>
>>>>Congrats. What are you using for a transmit antenna?
>>>>
>>>>
>>>>Gedas, W8BYA EN70JT
>>>>
>>>>Gallery at <http://w8bya.com>http://w8bya.com
>>>>Light travels faster than sound....
>>>>This is why some people appear bright until you hear them
>>>>speak.On 1/3/2021 10:26 AM, WM3M wrote:
>>>>>
>>>>>Last night running 200 mw on my QRPlabs U3S 
>>>>>had my first report in Europe from MD.
>>>>>
>>>>>2021-01-03 07:00      WM3M   
>>>>>   0.475702      -30   
>>>>>   0      FM19kg      
>>>>>0.2      LA2XPA      JP33 
>>>>>     5892      34      2      1
>>>>>
>>>>>Now need to work on a 2 way with Europe.
>>>>>
>>>>>73
>>>>>
>>>>>Emory  WM3M
>>>>>
>>>>>
>>>>>
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>>
>>73, Ed - KL7UW
>>Â  http://www.kl7uw.com
>>Dubus-NA Business mail:
>>Â  <mailto:dubususa at gmail.com>dubususa at gmail.com
>
>73, Ed - KL7UW
>   http://www.kl7uw.com
>Dubus-NA Business mail:
>   dubususa at gmail.com 
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