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Entry  Mon May 2 21:14:55 2011, kiwamu, Update, Electronics, too loose Heliax connectors on 1Y2 rack DSC_2982_ss.jpgDSC_2984_ss.jpg
    Reply  Mon May 2 23:29:57 2011, Suresh, Update, Electronics, too loose Heliax connectors on 1Y2 rack 
    Reply  Tue May 3 17:19:25 2011, kiwamu, Update, Electronics, Heliax connectors on 1Y2 rack : tightened 
Message ID: 4601     Entry time: Mon May 2 21:14:55 2011     Reply to this: 4602   4618
Author: kiwamu 
Type: Update 
Category: Electronics 
Subject: too loose Heliax connectors on 1Y2 rack 

I found that all the Heliax cables landing on the bottom of 1Y2 were too loose.

Due to this loose connection the RF power at 55 MHz varies from -34 dBm to 3 dBm, depending on the angle of the Heliax's head.

DSC_2982_ss.jpg

 

The looseness basically comes from the fact the black plate is too thick for the Heliax cable to go all the way. It permits the Heliax's heads to rotate freely.

What we should do is to make countersinks on the black plate like this:

DSC_2984_ss.jpg

 

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