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yamanx1 Profile
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Registered: 09-2007
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Sirio SD27 dipole


Vertical or horizontal 11m dipole

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 SD-27 Dipole


Sirio SD-27 Dipole CB/10m Antenna

• CB Base station antenna
• High power handling capability
• Factory tuned at mid-band
• Whip equipped with waterproof jointing sleeve
• Made of aluminium alloy 6063 T-832

Electrical Data
• Type: Dipole
• Frequency range: 26-28 MHz
• Impedance: 50O unbalanced
• Radiation (H-plane):
Horizontal mounting: Directional
Vertical mounting: Omnidirectional
• Polarization: horizontal
• Gain: 0 dBd, [sign in to see URL] dBi
• Bandwidth at [sign in to see URL]. 2:1: 3750 KHz
• [sign in to see URL]. at res. freq.: = 1.1:1
• Max. power:
1000 Watts (CW) continuous
3000 Watts (CW) short time
• Feed system / position: Gamma match / center
• Connector: UHF-female
 
 

Last edited by yamanx1, 18/Nov/2008, 9:59 am


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By all means think yourself big, but never think others small.... R.F.Scott
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26fb010 Profile
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Re: Sirio SD27 dipole


use them horizontal for better results..
7/Jan/2009, 1:18 pm Link to this post Send Email to 26fb010   Send PM to 26fb010
 
W2RLH Profile
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Re: Sirio SD27 dipole


For anyone interested in using this antenna, see my review on a terrific bargain antenna.

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5/Sep/2009, 1:27 am Link to this post Send Email to W2RLH   Send PM to W2RLH
 
topbuzzuk Profile
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Big Cheese
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Re: Sirio SD27 dipole


thats a very good review, well written. top job emoticon

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5/Sep/2009, 7:04 am Link to this post Send Email to topbuzzuk   Send PM to topbuzzuk Yahoo
 
crimso Profile
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Re: Sirio SD27 dipole


Not exactly sure why they need a Gamma match on this antenna, but used horizontally they make semi decent rotatable antenna.
5/Sep/2009, 5:36 pm Link to this post Send Email to crimso   Send PM to crimso
 
26fb010 Profile
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Re: Sirio SD27 dipole


yes, i also wondered "why the gamma match"?
its probably because it confuses CBers and looks intelligent so they can hype the price!!
7/Sep/2009, 5:53 pm Link to this post Send Email to 26fb010   Send PM to 26fb010
 
rich 26fb456 Profile
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Re: Sirio SD27 dipole


i have one of these antennas! but never used it its still in the box! may be i should try it?? i was also puzzled at the gamma match! all i can think off is it makes it quicker to tune you dont have to keep sliding the sections in and out to tune for chosen frequency? just move the gamma match!! 73s.
8/Sep/2009, 3:42 pm Link to this post Send Email to rich 26fb456   Send PM to rich 26fb456
 
56ww Profile
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Re: Sirio SD27 dipole


Hi,
Rich is right about that, and dipole is near 75 ohm but works great whit 50 and also antenna high will change matching point
73'mike
8/Sep/2009, 6:07 pm Link to this post Send Email to 56ww   Send PM to 56ww
 
rich 26fb456 Profile
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Re: Sirio SD27 dipole


hi mike! not sure if your the mike i spoke to the other week?? on the band i think it might be??? nice to see you on here! i think the dipole is a very underated antenna! they have been used as a bench mark for other antennas gain for years+years! i also think the dipole is probably the best value as well !! with its horizontal/vertical options! you could almost say two antennas in one!! 73s.
9/Sep/2009, 2:43 pm Link to this post Send Email to rich 26fb456   Send PM to rich 26fb456
 
29fb002 Profile
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Re: Sirio SD27 dipole


The SD27 is very much like the element of a sy27 3 or 4.
I had the sy27-4 and it broke , so i used the element fof / mobile dx.
Works good on flat side.

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Yaesu Ft 1000Mp MkvV (200 w) ,Moonraker 4,Create RC5, MFJ949E ,W2IHY 8band and eqplus , t-bone studio mic.
WKS 100 for AM day

Yaesu Ft857D - KL 400- K40 or dipole (mobile)
10/Sep/2009, 12:58 am Link to this post Send Email to 29fb002   Send PM to 29fb002 Blog
 


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