Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: SIRIO SY27-4 reviews ?  (Read 3113 times)
KD0TLI
Member

Posts: 42




Ignore
« on: December 01, 2012, 09:10:44 PM »

This is an attractive antenna for the price (about $150 + shipping).
Anyone have experience with them ?

SIRIO SY27-4     Its a 10 meter beam.
Logged
KB4QAA
Member

Posts: 2295




Ignore
« Reply #1 on: December 01, 2012, 09:55:08 PM »

No, it's an 11meter beam for 27Mhz.

*My recommendation is to buy a 10m antenna designed for ham use from one of the reputable American manufacturers e.g. MFJ, Cushcraft, M2, etc.   Good luck trying to get service from this Italian company; and your warranty is void with the first cut you make to modify it.  *my opinion.  shrug*

If you want to use it on 10m you will have to shorten all the elements and retune it.  There is a copy of a factory letter with suggested formula dimensions (but no guarantee) on the internet.

http://www.worldwidedx.com/amateur-radio-antennas/127562-need-info-how-modify-sirio-sy27-4-10m-2.html

Quote
Electrical Data
-    Type:
  SY 27-3: 3 element Yagi antenna
  SY 27-4: 4 element Yagi antenna
-   Frequency range:
  SY 27-3: 26.1-27.7 MHz @ SWR ≤ 2
  SY 27-4: 26.9-27.5 MHz @ SWR ≤ 2
-   Impedance: 50Ω
-   Radiation (H-plane): directional
-   Polarization: linear horizontal
-   Gain:
  SY 27-3: 8.5 dBd, 10.65 dBi
  SY 27-4: 11 dBd, 13.15 dBi
-   Bandwidth @ SWR ≤ 2:
  SY 27-3: ≥ 1800 KHz
  SY 27-4: ≥ 600 KHz
-   SWR @ res. freq.: ≤ 1.2
-   Max. power:
 1000 Watts (CW) continuous
 3000 Watts (CW) short time
« Last Edit: December 01, 2012, 10:00:44 PM by KB4QAA » Logged
KA7NIQ
Member

Posts: 255


WWW

Ignore
« Reply #2 on: December 18, 2012, 12:24:29 AM »

This is an attractive antenna for the price (about $150 + shipping).
Anyone have experience with them ?

SIRIO SY27-4     Its a 10 meter beam.

There are hundreds of Hams using the 4 element Sirio "CB Beam" on 10 Meters, with great results!
The 4 element Sirio "CB Beam" was designed for the middle of the 11 meter band. (CB Channel 20)
That is 27.205 mhz
You simply take 27.205 and divide it into 28.5, and you will get a number like .97 percent.
Then, take that ratio, and multiply all spacings and element lengths by it, to get the new dimensions for the 10 meter band.

Logged
KB6HRT
Member

Posts: 100




Ignore
« Reply #3 on: December 23, 2012, 08:10:14 AM »

If you are going to use the antenna for a small portion of the 10 meter  band it will work, but a better choice would be an A99
if you want to use a vertical antenna, its way more broad banded and can be used on 10-11 -12 -15 - and 17m with the antenna
tuner used in most HF radios with good results an cost 2/3 the cost and has about the same wind load...........KB6HRT
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!