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From: six@uhf.wireless.net
Subject: re: Dayton Johnson's 1296 double rhombic.
Date: Fri, 29 Nov 1996 19:14:59 -0500 (EST)

> >Hi,
> I don't know about the 23cm design but I do remember seeing a 70cm double
> rhombic described in 73's magazine around 1978 (+/- 1 year).This one should
> be the inspiration source for the 23cm antenna.Just one word:gain is OK to
> win gain contests but more important is G/T.For Rhombics G/T is very poor
> due to low efficiency (loss in terminating resistor),the very poor
> efficiency is OK on HF,but not on VHF/UHF.Noise temperature of the antenna
> is very high.So if you want a good antenna built something else.
> 73's Dom

What's G/T? Don't you mean front to back?

There aren't a lot of users in the 900 MHz. band in this area, so rejection of undesired direction isn't as important.

73

Bernie nu1s ------ Submissions: vhf@w6yx.stanford.edu Subscription/removal requests: vhf-request@w6yx.stanford.edu Human list administrator: vhf-approval@w6yx.stanford.edu