OK, Frank, nice job with the video -- it gives my DSL
connection a workout.
My opinion:
The Orion power meter shows the same kind of
fluctuation that I see on my unit. So that much is
probably "normal".
The DC current meter shows similar fluctuations, which
indicates that 1 or 2 Amps x 12 volts = 12-24 watts of
input power fluctuation is going _somewhere_.
This is probably nothing to worry about, because a
change of 2 watts out of 50 is still only 0.2 dB, 1/30
of an S unit. The question is whether this is a
normal "feature" of the Orion. I think it could be.
See http://www.doug-smith.net/digitalagc.htm for some
technical description of the TGC system. TT does not
specify the Tx output stability, so it's likely you
are actually measuring the normal fluctuations in the
TGC system. A few times 0.1 dB is not so bad -- you'd
never be able to measure it over a normal radio
circuit. It is inelegant, however!
73, Martin AA6E
--- I2DMI <i2dmi@contestvolta.it> wrote:
> Hi,
> Martin gave me a very good idea. I prepared a video
> showing my three
> S-meters: ORION - MFJ 993 - DAIWA (power supply I
> used for tests).
>
> You can see this video (or download the zip file) at
> this page
>
> <http://www.contestvolta.it/myorion/myorion.htm>
> http://www.contestvolta.it/myorion/myorion.htm
>
>
> I excuse me but the size is NOT small (15 seconds of
> film).
> I put three clips on the same screen to reduce the
> size of file, but ..
>
> I'll appreciate any comment on this problem.
> best 73 Frank I2DMI
>
>
> ------------------------------------
>
> Hi Martin,
> (sorry for English mistakes) hi!
>
> As "Power absorption" I mean the current the ORION
> requires for
> transmission.
> It is abt 23amps at 13.8 Vdc for 100W output power.
> It is abt 14amps at 13.8 Vdc for 50W output power.
>
> I'm sorry but the videos didn't start. I have Quick
> time software on this
> computer.
>
> In any case this is a very good idea. I'll prepare a
> video.
> In next message I'll write the web-address were the
> video is.
>
> 73 for now. Thank you for your help.
> 73 FRANK I2DMI
>
>
> ------------------------
>
> Frank,
>
> I don't know what you mean by "power absorption". I
> don't see such variations in power output on my
> analog
> meter. If you are using a digital meter, I would
> check the meter itself. Does it work stably on some
> other transmitter?
>
> For fun I have produced a couple of videos of what I
> see on my setup. You can go to
> < <http://www.aa6e.net/aa6e/orion_pwr.html>
> http://www.aa6e.net/aa6e/orion_pwr.html>
> <http://www.aa6e.net/aa6e/orion_pwr.html>
> http://www.aa6e.net/aa6e/orion_pwr.html for these.
> (Helps to have a fast Internet connection!)
>
> 73, Martin AA6E
>
>
>
>
>
>
> _______________________________________________
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> TenTec@contesting.com
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>
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