[RTTY] What should I expect from 3db improvement in SNR?

[Boyan]

I'm using ACOM2000A since 2005 at full power. It is on the floor behind the desk and air intake is ~10cm from the wall. Exhaust air never exceeded 90C even in hot summer days, no extra fans, no noise, no problems.
It sounds like advertisement, but it is truth.

73 Boyan LZ2BE/LZ8E

--- On Thu, 2/17/11, Phil Duff <na4m at arrl.net> wrote:

From: Phil Duff <na4m at arrl.net>
Subject: Re: [RTTY] What should I expect from 3db improvement in SNR?
To: rtty at contesting.com
Date: Thursday, February 17, 2011, 12:37 AM

On 2/16/2011 22:19, WS7I wrote:
> All I can echo here is that you need AIR, AIR, in the RF Deck in
> places they don't ever think about.  Like the solder melting out of a
> Henry tuning section. (Fixed that with more FANS.
>
> Most Amp's even Alpha's require more AIR.

Yep - running RTTY @ 1.5kw needs plenty of AIR.

This also means do not cram the amp back under a shelf and/or close to a 
wall.
The air intakes and exhaust need plenty of space to "breathe".

A key consideration of an amp for RTTY contesting that is often 
overlooked is the amp's power supply design - in particular the KVA 
rating of the power transformer.   Just because the RF deck has big 
honkin' tube(s) doesn't mean the power supply is up to the job over the 
long haul.

73 Phil NA4M


-- 
-. .- ....- --   -. .- ....- -- -. .- ....- --
Phil Duff
Georgetown, Texas
http://priceless.apduff.com
http://stockphoto.apduff.com

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