Sirio 2745

[twa77]

I just got a 2745 sirio 1/4 wave ground plane. It looks similar to the m400 except it doesn’t have the three little radials halfway up the radiator. It also doesn’t have the plastic braces on the ground radials. The mounting hub fits over a 1-5/8 mast. In bought an exhaust adapter and welded it on the end of a radio shack 1-1/4 mast. I will get my new coax Monday (LMR400) and hope to have up next week sometime. It gets windy here so I wanted something a little more low profile than my imax. I have an analyzer and will report back with results once erected. Should end up roughly 30 feet up in the air.

 

[twa77]

Here is the modified mast and hub which fits nice and snug.

 

[barefootindian]

Results look well, hope it works out for you

 

[twa77]

I got antenna up. Tuned out towards top of cb band at 103 inches 50 and zero ended up at 27.5

 

[twa77]

Oops forgot the pics

 

[twa77]

Band was quiet this afternoon didn’t get a chance to try yet. Hopefully some skip will roll in one of these days.

 

[86lidewell]

I have the SIRIO m400 starduster. It's a great antenna. I think you will be happy.

 

[86lidewell]

Also, just got a crazy storm here in N Texas. It still up there.

 

[86lidewell]

If-en it does wind load break, this is where it will:


There's a pressed in and glued brass pin that goes up inside the bottom of the vertical and high wind forces can cause the leverage of that long tube to break right there at the top of that pin. FEAR NOT! It's an easy fix. Ask me how I know...

Alternately, you could slip a piece of heavier aluminum tubing over it before you set it up.

 

[twa77]

I looked at that one too. What are the 3 little radials on the radiator. I thought maybe it was snake oil for a basic 1/4 wave. But maybe it adds audio gain.

 

[86lidewell]

Those are secondary ground planes. They assist in the "lift-off" of people like me's wallets out of the hip pocket.

 

[twa77]

Ha good one

 

[undertaker]

86lidewell I have one new in the package. But I don't understand the metric measurements... I would like to be able to put it together shit I'm old!!!

 

[twa77]

Divide mm by 25.4 = inches

ex. 2620mm /25.4=103.14 inches

 

[twa77]

Got into Tennessee from South Dakota today. First dx contact of this antenna