[Moon] Focal point question.

[Steve Gross-N4PZ]

Thanks Craig

Strange. Seems it has something to do with the actual focus happening inside the pipe. Mine is 5 cm farther out on 13 than 23 cm. I tried to double and triple check it and that's not my error as far as I can tell.

A bit puzzling.

73

Steve N4PZ


________________________________
From: craig <cats at amplex.net>
Sent: Wednesday, May 10, 2017 9:24 AM
To: Steve Gross-N4PZ
Subject: Re: [Moon] Focal point question.

Steve :

I noticed that on my 5.6m antenna. The 2304 location was different than the
432, 902, and 1296 positions. Just figured that it was an anomaly of the
dish.

Craig, N8DJB/4


-----Original Message-----
From: Steve Gross-N4PZ
Sent: Monday, May 08, 2017 1:22 PM
To: "'freetalk moonnet'"
Subject: [Moon] Focal point question.

Hello All

I have a 4.9 meter dish. I have two ve4ma feeds one for 1296 and one for
2304. I find the focal point for the 2304 feed to be about 5 cm farther from
the dish than the 1296 feed. With or without the choke it is the same. I am
not a newcomer as  have been building and using dishes both commercial and
HB for 40+ years. I am puzzled.

Help.

Steve N4PZ
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