[600MRG] KU4XR Maiden Voyage on 630 meters

[Edward R Cole]

If you don't have a scope then a diode and milliameter will suffice 
as RF ammeter IF you have or make a step-down transformer (toroid 
works).  That is all that my NDB transmitter has.  Of course the 
transformer is matched for the output Z of the amplifier.  I run the 
50-ohm tap into coax and match the loading coil at other end.

I do have a couple scopes so able check readings into 50-ohm load.

I run 1.4 RF amps which is equivalent to 98w.

73, Ed - KL7UW
Still working on my UHF stuff that keeps the inverted-L on the ground 
until array is raised by winch (Hazer Lift).

At 01:01 PM 2/17/2018, Ken Roberson via 600MRG wrote:
>Andy
>Good to hear that ur getting on 630M , If I can help let me know.
>You need a scopematch and some kind of O-Scope
>Check my web - site for info on the O-Scope that I use with scopematch.
>Ken K5DNL
>
>www.k5dnl.com
>
>
>On Saturday, February 17, 2018, 1:55:51 PM CST, Andy - KU4XR via 
>600MRG <600mrg at mailman.qth.net> wrote:
>
>
>Greetings all:
>
>I have begun transmitting WSPR on 630 meters today .. as of this 
>post, I have made 8 transmissions and the
>transmit converter has not exploded .. It is doubtful that I will 
>have any receptions during daylight, but hoping that
>nighttime will yield results.. In short detail, the TPO is 20 watts 
>( best guess - wattmeter shows 30 watts ) into the
>loading coil , I know I can connect a DVM inline and measure PA 
>Current, and I will at some point soon ..
>I checked SWR function with a dummy load to be sure the FWD/REF 
>section showed something close..
>The SWR showed 1.1 on the dummy load .. When I connected to the 
>loading coil; I was surprised to only
>need to move a couple of turns on both the matching, and loading 
>ends of the coil, and the meter is showing 1.2 :1
>whether I can trust that or not I don't know, but, it is all I have 
>to use .. I ain't walkin off and leavin it !! still afraid it
>might explode on any transmission . I really didn't think I would 
>get this far along, so; I'll see how it goes..
>
>73 all:
>
>Andy - KU4XR
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73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubususa at gmail.com 
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