The CHA WINDOM 40 antenna is designed for 40m, 20m & 10m. A tuner may be needed to tune the other bands between 80M and 6M. Power handling is 250W SSB. Built with the portable user in mind. Very light weight. Does not require an antenna tuner under normal circumstances. SWR is < 2:0 (Typically a 1:3 to 1:6 ) at about 35′ to 45′. The antenna SWR is influenced by the balun elevation, wires angle, feed-line length and structures proximity.
The following SWR chart shows the SWR curves of the CHA WINDOM 40 elevated at about 10′ of elevation and installed in an inverted “V” configuration. A RigExpert AA-520 and a 50′ long RG-8X coax cable were used. The SWR will be influenced by the antenna elevation, the angle between the two legs and by the coax length and type.
Antenna total length is 66′. Antenna wire elements are #16 proprietary stranded wire (short side is 22′ (6.7m) long and longer side is 44′ (13.4m) long). Built with a 5:1 250W SSB balun mounted on a polycarbonate plate. A 10’ of paracord 550 has been added at each ends of the antenna and another 20’ to secure the balun.
Specifications:
Frequency: 6M – 40M
Power: 100W CW or 250W SSB
RF Connection: SO-239
Weight: TBA
The antenna system consists of:
1 X CHA WINDOM 40
1 X ANTENNA PORTABLE POUCH
$165.00
More
The fourth annual AM Rally operating event will take place February 1 – 3 (UTC). The annual AM Rally encourages all operators to explore amateur radio’s original voice mode by showcasing the various types of AM equipment in use today,... Read more
![Amptec HF2015DX Amplifier [ Video ]](https://qrznow.com/wp-content/uploads/2016/06/13418697_274756909542928_7182125022279320675_n-90x60.jpg)
More
“Project Goodwill Kosovo” Celebrating Independence and New DXCC Status
A new on-the-air team is taking the reins at Z60A, as “Project Goodwill Kosovo” moves into its second week, with only 2 weeks to go until the actual 1... Read more
DX Alert App ( Mobile )
DX Alert App Instead of being connected to a DX cluster directly you can use DX Alert to monitor the cluster for you and get notifications on your pho... Read more
![Harbor Freight Solar Panel for Ham Radio [ Video ]](https://qrznow.com/wp-content/uploads/2016/05/8-2-13solar-006-190x122.jpg)
Harbor Freight Solar Panel for Ham Radio [ Video ]
As an easy introductory solar project I purchased Harbor Freight’s 45 watt solar kit for my ham radio use. Read more
500 mW on 7 MHz with the Wadetenna
Testing the Wadetenna on 7 MHz SSB. Only 500 milliwatts was used instead of the usual 5 watts. Contacts up to about 500km, mostly to portable stations... Read more
2015 Southwest Florida Regional Hamfest
2015 Southwest Florida Regional Hamfest Date: January 16 – 17 2015 Setup Jan 16th 0600 Gates open @ 1200 noon until 500 PM Setup Jan... Read more
Contest University – Puerto Rico Convention
Photo: NR5M Read more
New ! Yaesu FT-410
YAESU FT-410 features General Rx Frequency Range: 30 kHz – 30 MHz (operating) 160 – 10 m (specified performance, Amateur bands only) Tx Frequency Ra... Read more
Baluns : What They Do And How They Do lt
By Roy lV. Lewallen I’ve always been a bit bothered by balunst since I was never sure what they are supposed to dot let alone hotv they... Read more
FT8 Performance Secrets
“Neil investigates what really matters when you are aiming for the ultimate performance with FT8 and other digital modes. He demonstrates and ex... Read more