[Tech-Assist] STL problem now critical

[Mike McCarthy]

The stabilizing arms are really critical on those longer feed points. If 
you don't have them, get them. The base flange alone is not sufficient 
to hold stable the feed point with wind and/or ice. If it's the one I'm 
thinking of, the feed point assembly is really nothing more than a 
milled section of heavy wall rigid coax with the mounting flange and 
stabilizing ring soldered to the outer. A pretty clever means to 
maintain and transform the impedance and drive the dish.

As I recall, the Teflon side is always up so water doesn't accumulate 
inside the insulated assembly.  That said, if there is a weep hole at 
the tip, moot point.

MM

On 3/28/2012 2:19 AM, Jerry Mathis wrote:
>
> On Tue, Mar 27, 2012 at 11:17 PM, RADIO DOCTOR<lylehenry at fastmail.fm>  wrote:
>> The P-9A96GN driven element is for an 8' grid dish and has an N
>> connector on it.  Some 8' and all 10' Anixter-Mark dishes I've seen have
>> three 'guys or struts' to hold the driven element in place in heavy
>> icing or big winds.  Seems that is what the extra flange would be for.
> Interesting question about the radomes. I don't know how they are 
> currently oriented. I always thought the radomes should point down, so 
> a leak around the radome wouldn't let water into the RF feed assembly. 
> Your information about the RF feed is the kind of info I was hoping 
> for. The model number on the RF feed does indicate it's for the 8' 
> dish, and now I know what the extra mounting flange is for. Still 
> hardly any comments about RF feed lengths or dish focal point. -- 
> Jerry Mathis