[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]
Re: Antenna Advice pse.
- Subject: Re: [amsat-bb] Antenna Advice pse.
- From: Portsmouth Thomson G-net 841 226817 <portsmouth.thomson@xxxxxxxx>
- Date: Wed, 07 Oct 1998 11:08:42 +0100 (BST)
- Autoforwarded: false
- Disclose-Recipients: prohibited
- Hop-Count: 2
- In-Reply-To: <87hfxhwd22.fsf@TVR-LINUX.THEOS-Software.Com>
- Mr-Received: by mta ESDV01.MUAS; Relayed; Wed, 07 Oct 1998 11:08:42 +0100 (BST)
- Mr-Received: by mta ESDV01; Relayed; Wed, 07 Oct 1998 11:08:43 +0100 (BST)
- Mr-Received: by mta GCSCHM; Relayed; Wed, 07 Oct 1998 11:09:28 +0100 (BST)
- Sensitivity: Company-Confidential
- Ua-Content-Id: 11CA3AC82A00
- X400-Mts-Identifier: [;9842081107101998/A13409/ESDV01]
>> So i'm not sure i agree with their formulas entirely and
>>did alot of "cut and try" with NEC2 to come up with what i'm using.
>>KD6PAG
I used LPCAD24 software (developped by WB0DGF) to design my 130/1300 MHZ LPDA.
I used NEC4WIN (developped by VE2GMI) to draw azimuth and zenith patterns.
LPCAD24 gives an approx. gain of 7 DBi.
NEC4WIN gives 7.91 DBi.
Measured SWR is about 1.05 on 2m and 70 cm bands.
I did not test it on 23cm band.
Best DX was W4FJ on AO-10 (tx with LPDA, rx with turnstile).
The transceiver is an ICOM IC821H.
>> The problem i see with a broadbanded approach
>>is that, in urbanized areas, one may pick up alot of very high power signals
>>that are already pretty close to the amateur bands.
Leaving in a valley close to Paris, I'm lucky to have no direct visibility on
the
capital city QRM.
Cheers
Jean-Louis G/F6AGR
----
Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
AMSAT Home