Balun for 450 ohms balanced antenna to 50 ohms co-axial. 9:1 W2FMI Jerry Sevick

Unsold See similar items $104.50 Buy It Now, eBay Money Back Guarantee
Seller: linwei624 ✉️ (731) 100%, Location: Tustin, California, US, Ships to: US & many other countries, Item: 282317703889 Balun for 450 ohms balanced antenna to 50 ohms co-axial. 9:1 W2FMI Jerry Sevick.

CWS  9:1 Balun Current Type Jerry Sevick W2FMI Series

High Power Powder Coated  Core 9:1 ratio; 450 balance antenna to 50 ohms co-axial; 1.5 - 30 Mhz.; Weatherproof box.

Specifications:

Frequency Range:  1.5 - 30 MHz

Ratio: 9 :1

Termination Impedance (Ohms): 450  balanced

Termination Location:  Top

Termination Type: High Voltage   Ceramic feed through

Enclosure Type:  Weatherproof box. Can widthstand rain, snow, sun, etc

Enclosure Material: Anodized Aluminium  Metal

Core Type:  K-Type High Power Ferrite core

Power Handling (CW/SSB):   1 kW / 2 kW

Enclosure Height: 6.25  in. (6.8 inch with flange)

Enclosure Width:  3.80 in.

Enclosure Depth: 3.60  in.

Lowest Band of Operation:   200 meters

Highest Band of Operation:  10  meters

Antenna Mounting Type:  Antenna wires

Details:

Custom K type core is used to obtain the widest bandwidth.  Typically insertion loss is less than 0.2 dB. Highest voltage breakdown ratings. BALUN is " Current" type Anodized  Aluminum case with SO 239 connector and 2 ceramic feed through post as outputs.

Application:

1. Use W2FMI 9:1 balun to matching 50 ohms cable to a balanced load of 450 ohms

2. Use 2 of these baluns when a 450 ohms ladder line or twin leads is used to replace long runs of coaxial cable. The co-axial cable has more loss at frequencies above 14 mhz as compared to ladder lines. Install one balun on each ends.

3. Be careful when using the 9:1 balun as the terminations can cause the impedances even though the feedline maybe 450 ohms. 

For example, a center fed half wave dipole, the impedance could be from 50 ohms to 4000 ohms. Also if the center fed dipole is a full wave long, the balun could be seeing impedance of less than 50 ohms to as high as 10K ohms depending on the length of the transmission line. 

  • Condition: New
  • Type: Balun (9:1)
  • Brand: CWS
  • MPN: BAL-450
  • Model: W2FMI 9:1 Antenna Matching Balun
  • Country/Region of Manufacture: United States

PicClick Insights - Balun for 450 ohms balanced antenna to 50 ohms co-axial. 9:1 W2FMI Jerry Sevick PicClick Exclusive

  •  Popularity - 3 watchers, 0.1 new watchers per day, 30 days for sale on eBay. High amount watching. 0 sold, 2 available.
  •  Best Price -
  •  Seller - 731+ items sold. 0% negative feedback. Great seller with very good positive feedback and over 50 ratings.

People Also Loved PicClick Exclusive