The EH-antenna is offered as a compact, efficient short antenna. The user reports about this antenna are very varying, from enthusiastic to unusable. Therefore, I was interested since long time to perform a comparison test of the RoomCap with this antenna. On Nov 30, we could do that.
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The EH-antenna is offered as a compact, efficient short antenna. The user reports about this antenna are very varying, from enthusiastic to unusable. Therefore, I was interested since long time to perform a comparison test of the RoomCap with this antenna.
On Nov 30, we could do that. We installed both antennas in a free camp and tested exhaustively on m. In contrast, the RoomCap can be used in the full band from 1. This problem complicated the testing somewhat, as we had to ask the remote stations to change the QRG to 1. The comparison tests began at Until then we had 11 test contacts, and Andy said, that further QSOs do no longer change the result.
The result was clear. In each contact the antennas were changed many times, and the remote operators were asked to measure the signal difference. All stations reported that the EH antenna is significantly weaker, and they reported signal differences beween 2 to 4 S points.
The averaged signal difference was 3 S points. Some stations were unable to measure the signal difference, as the signal of the EH antenna was not readable. The test showed, that it is possible to make contacts with the EH antenna, however the signal strength in comparison to the RoomCap antenna is about 3 S points weaker. This "good result" is obtained only, if the antenna is operated within 20 KHz of the resonant frequency.
If the antenna is used outside this frequency range, an additional signal loss of 1 S point and more is to be expected
ROOMCAP ANTENNA PDF DOWNLOAD
On August 12th. August we made the first antenna test on a building with clay tile roofing and wooden understructure. The R was monted on a mast on top of the roof, abt. The test was conduted on 40 m band. Both antennas decoupled from each other and connected to the same transceiver via a coax switch. Here follows the QSOs with the received reports: Remote stn.
Red Wave Radio
Zolojinn Right now I cannot link roomcap antenna your site. We intended to conduct at least 10 contacts on 40 m and afterwards to perform a test on 20 m during one hour Another senario is that when the person analyzing the antenna reports less than spectacular results — results that agree with standard antenna theory — the antenna roomcap antenna will claim that the antenna was constructed improperly. August we made roomcap antenna first antenna test on a building with clay tile roofing and wooden understructure. It initially endorsed or at least highlighted many hoax antennas. One thing I can reveal here: The neighbour returned from vacation and was disturbed by rooomcap antennas.
You should know that, if you have read the homepage of the antenna. If you really want to know how it works, and you want be be the owner of such antenna, you may obtain the construction guide. Someone else sent a link to an EH antenna as the answer. I guess they were wrong. Right now I cannot link to your site. For some reason, I am unable to send email to your address, I think it has something to do with spam filters. I get this periodically as someone on bellsouth sends a message to a spam trap and the entire ISP is blocked.