[TenTec] Rhombics

[Dr. Gerald N. Johnson]

But then the transmitting antennas in the states might have been curtain 
arrays of dipoles with a mere 20 dB gain fed by 250 or 500 KW RF.

73, Jerry, K0CQ

On 12/7/2010 5:08 PM, James Duffer wrote:
>
> Sounds good, especially the rhombic.  I visited the  VOA (Voice of America) receive plant at Furstenfeldbruck (spelling?) Germany in the 60s.  They used curtain rhomibics (3 tiers) in a triple space diversity configuration with diversity receivers RCA and Racal the audio sounded like it was coming from a record.  Then then retransmitted it beaming it to other countries  in Europe/Africa
> Jim (wd4air)
>
>> Date: Tue, 7 Dec 2010 09:30:05 -0800
>> From: n4ydu at yahoo.com
>> To: tentec at contesting.com
>> Subject: Re: [TenTec] Rhombics
>>
>> The beverage is inefficient on both transmit and receive. However, you can make up for the inefficiency on receive with a preamp or matching network to take advantage of the directivity qualities (providing it is terminated or even bidirectional) of a beverage. This is not the case for transmitting.
>>
>> A rhombic would be a super antenna in terms of transmit and receive, especially if it was terminated and worked in just one direction. One could theoretically null out noise on the low bands. While some low band yagis exist, obviously the size and money involved isn't practical for the average ham. This is when a low cost beverage comes into play and can greatly enhance one's ability to receive.
>>
>> I use a short beverage on 160 and 80 (sometimes 40) as well as two pennant RX antennas we good results. It comes in handy during contests to null out strong signals the the NW and S that interfere with European signals. It cuts down on the fatigue factor as well.
>>
>> Beverages are used with success on the high bands at a handful of the multi-multi mega stations with success as well. I believe they are used as alternatives to cut down on potential interference from other transmitters within the station (especially in the case of two stations on the same band that are interlocked).
>>
>>
>> 73,
>>
>> Nate/N4YDU
>>
>> --- On Sun, 12/5/10, JOSEPH DAVIS<iloveantennas at dishmail.net>  wrote:
>>
>>
>> From: JOSEPH DAVIS<iloveantennas at dishmail.net>
>> Subject: Re: [TenTec] Rhombics
>> To: "Discussion of Ten-Tec Equipment"<tentec at contesting.com>
>> Date: Sunday, December 5, 2010, 6:09 PM
>>
>>
>
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