Od: moon-bounces@moonbounce.info za uživatele jh1krc@syd.odn.ne.jp
Odesláno: 22. února 2007 21:57
Komu: moon@moonbounce.info
Předmět: [Moon] 8N1EME test transmission

Hi all.  

The Project BIG-DISH, a Japanese EME group, signing 8N1EME, already 
began the test transmission for RFI investigation and for the echo 
tests, Feb. 22.

In the morning, we had to adjust the feed position of the 144/432 
loop feeds by pulling the strings.   The marionette style feed 
support seems to be really effective for this temporary test site. 
The feed impedance was obtained appoximately 50 ohms 
( between 45 to 60 ohms) on each band. 

On 432 MHz, the receiver sensitvity was low at the beginnig.  
LNA oscillation at 400 MHz was detected with a spectrum analyzer.
By putting a series variable resister in the LNA power line, the 
LAN was stabilized.   The gain and NF might change a bit, but 
better than oscillation.  

After 0815 UT on Feb. 22, 8N1EME transmitted CW on 432.030 
MHz, 500 watts at TX, got the EME echo with 579 level, and had 
no TVI at neighbour house located about 100 meters from the antenna. 
Then SSB test followed to get a very roud and clear echo.  

Then we moved the frequency to 144. 084 MHz.  Soon after we 
got very good CW echo on the band also.  JH0MHE heard this signal 
and reports the signal was slightly stronger than HB9Q. 
SSB echo was also very clear on this band.  

1296 MHz antenna feed is stably installed in position.  It looks 
beautiful.  
Unfortunately we had a problem in the 500W HPA, and had to 
wait for the repair.  The HPA is now in the shack (under the 
antenna pedestal)  and originally is planned to install in the 
highere posision at the elevation axis level, approx. 25 meters 
from the ground.
Here in Ibaraki the weather is rainy now.  It is strictly restricted  
to go up onto the antenna pedestal by the KDDI's rules, specially  
in the bad weather (rainy/windy) and after the sun set.  
So we had to wait for the wether condition improves also.  

The government telecom officials will come and see the station 
this afternoon around 05-06 UT Feb. 23 (today!).

We will make an announcemet from time to time.  
Thank you.


Mike Watanabe, JH1KRC
Project BIG-DISH 2007






CW?SSB?????????????????????
144.084????

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