Re: [Repeater-Builder] db comparisons

[russ]

One big question? Is every thing rated the same? I.E.: dbd? Not mixed and matched I.E.: dbd/dbi and yes even dbc<smile> 73 Russ, W3CH   ----- Original Message ----- From: Mathew Quaife To: Repeater-Builder@yahoogroups.com Sent: Sunday, August 29, 2004 8:56 AM Subject: Re: [Repeater-Builder] db comparisons Well since were tossing cents here, no 3DB will not give you twice the range, and I will tell you why.  I have two antenna's here at the shack, one is a 3 DB gain and the other a 6 DB gain, in preperation of changing the tower for the repeater, I set the repeater on the 3db gain antenna, and no difference, maybe a mile or two.  What is even harder for guys to understand, the 6 DB was at 65 feet and the 3db is only at 45 feet.  SO even the 20 feet in height did not make a difference.  To see a difference, I would have to double the height of the antenna, and that would not double the gain in distance because now I have additonal cable and a different ground pattern.  If you want distance, I have to agree with most other Hams, use remote receiver sites.  Just my two cents worth, I'd give more, but I am in the poorest county in the state of Indiana.   Mathew   An old adage given to me by an old timer 20 or 30 years ago is worth mentioning here (I think), "Doubling the height of the antenna reaps you more benfits in terms of range than squaring the output power (ERP)". my 2 cents to the discussion mch wrote: No, it won't. 3dB will give you 1 s-unit increase and slightly more range, but nowhere near double. Joe M. ian wells wrote: just a quick question can anyone give a idea of difference of range when swaping a 6db base ant to a 9 db ant. would it be close to 2x the range in kms Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ Yahoo! Groups Links To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/   To unsubscribe from this group, send an email to: [EMAIL PROTECTED]   Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.