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 third public test of FT8 DXpedition Mode on May 5 is being called a success. The goal of the exercise was to simulate a rare DXpedition pileup on FT8 by having many stations (“Hounds”) calling and trying to work a designated pseudo DXpe... Read more
![Carribean Emergency Response – Update [ IARU ]](https://qrznow.com/wp-content/uploads/2017/09/OK-90x60.jpg)
More
Amateur radio provides critical communications when all else fails
Luke Moretti, News 4 Reporter BUFFALO, N.Y. (WIVB) – A catastrophic blackout could takeout modern modes of telecommunications. And that could spell bi... Read more
ARRL DX Bulletin #11
DX News — ARRL DX Bulletin #11:ZCZC AE11 QST de W1AW DX Bulletin 11 ARLD011 >From ARRL Headquarters Newington CT March 19, 2015 To a... Read more
India Gains Three New Bands, Sweden Gets Permanent 60-Meter Access
Radio amateurs in India Radio amateurs in India now have access to three new bands. India’s Ministry of Communications’ Department of Telecommunicatio... Read more
New All-band SSB/CW Micro BITX Now Available
“HFSignals.com now offers the uBITX (micro BITX) HF radio, an all-band QRP rig that operates both sideband and CW, for the truly remarkable pric... Read more
Radioddity GD-55 Plus UHF 400-480MHz Waterproof DMR Digital Radio,10W with 2800mAh Battery Mototrbo Dual Time Slot (Tier I&II)
Brief introduction for Radioddity GD-55 Plus, A Practical DMR GD-55 Plus Differentiating Factors 10W High Power IP-67 Waterproofed Mototrbo Tie... Read more
Germany on 70 MHz in 2019
German radio amateurs may operate from their home with all modes in the frequency segment 70.150 to 70.200 MHz from now (19 december) until the end of... Read more
Rfinder for Visually Impaired on Android
Rfinder Tom W3ZX, a visually impaired ham gives a great demo on Android using TalkBack for the visually impaired. See More: http://www.rfinder.net/blo... Read more
Netherlands Radio Amateurs Face Fee Increases
While US radio amateurs face the possibility of a $50 application fee, some countries have been imposing license fees for some time now. Netherlands I... Read more
9G5SP Ghana
Piotr SP3UQE will be active from Ghana, starting 15 September 2015, as 9G5SP. QSL via home call. Source: Read more
The K7RA Solar Update
Over the past week, on Monday, October 21, 10.7 cm solar flux sunk to possibly the lowest level in recorded history. Solar flux was 64, which is even... Read more