Jim is talking about "power way up", 3-6db above legal limit.
73
Peter
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Roger (Sub1)
Sent: Sonntag, 30. Januar 2011 06:18
To: amps@contesting.com
Subject: Re: [Amps] I answered it.
On 1/29/2011 10:40 PM, DJ7WW wrote:
> It is more then likely that those on a city lot who crank their power
output
> way up will run into trouble with their neighborhood.
I shouldn't say this out loud as it might jinx the operation, but I've
run the legal limit or close to it for most of the years I've been
active. The "only" RFI complaint was about 10 years ago when my 50
watts into stacked 14's on 147.6 was getting into a neighbor's TV with
rabbit ears, out in his garage about 100 feet from the base of the
tower. I gave him a new TV antenna still in the box I had stored over
my garage. We put it up in the rafters of his garage and that was the
end of the RFI. Plus I had free beer and an invite to their parties.
I've had 2 different neighbors at that address since then and it's up
for sale again. What I fear is some one moving in with equipment that
either creates RFI or is susceptible to RF
73
Roger (K8RI)
> 73
> Peter
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of Jim Thomson
> Sent: Sonntag, 30. Januar 2011 04:13
> To: amps@contesting.com
> Subject: [Amps] I answered it.
>
> Date: Sat, 29 Jan 2011 16:06:56 -0500
> From: "Roger (Sub1)"<sub1@rogerhalstead.com>
> Subject: Re: [Amps] I answered it.
>
>> A well asked question. I didn't recall the original question.
>> First we are allowed only 200 Watts, so 3dB over a 100 Watt transceiver
> will not be noticeable.
>
> ### and ur typ 40m shorty 40m yagi is only 3 db as well..yet they work
very
> good. [ a full size 40m yagi is only 4.2 db].
> All these dbs' start to add up. Double the power output AND increase the
ant
> gain by 3db..and now you have 6 db..which is nothing to sneeze at.
> Now increase the height of the ant/shorty 40m..and the gain goes up some
> more. Now replace the 20 yr old junk coax
> with some 7/8" heliax, and you gain some more. [ 7/8" RFS brand heliax
is
> dirt cheap from davis RF].
>
>
>
> 3db is noticeable in many instances and may make the difference between
> getting through or not on a noisy band.
>
> ## IMO..who cares how one gets his ERP. Bigger ants and low power will
> work as good as smaller ants and more power,
> with the caveat that ant gain is useful on RX as well as TX... where as
the
> bigger amp only works on TX.
>
> ## In any event, once you are maxed out with ants, the bigger amp is all
> that's left. Most folks on city lots don't have room for
> 4 squares on 160/80/40m. imagine if you are maxed out on all bands for
> ants... then imagine what would be involved in trying to
> get another 3-6 db on ALL bands ! At that point, it's far more cost
> effective, simpler, to just crank the power output way up. One
> box, that has loads of gain..and works on all bands, isn't out in the
> rain/lousy wx, etc.
>
> later... Jim VE7RF
>
>
>
> 73
>
> Roger (K8RI)
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