[RTTY] Key down & 50% power

[Don Hill AA5AU]

When I bought my first Icom IC-751A, I was concerned about running it at full power on FSK so I called the factory and they said
"Yes you can run it at full power in the FSK mode because we designed it for that!".

The only rig I backed the power down a bit on was my Drake TR-4C after I ran the finals down the first time running it at 140 watts
output AFSK.

73, Don AA5AU
http://www.aa5au.com
http://www.rttycontesting.com 

-----Original Message-----
From: rtty-bounces at contesting.com [mailto:rtty-bounces at contesting.com] On Behalf Of Jeff Blaine
Sent: Wednesday, August 24, 2011 5:20 PM
To: pcooper at guernsey.net; rtty at contesting.com
Subject: Re: [RTTY] Key down & 50% power

Phil's comments about this recommendation being rig specific is right on the money.  That kind of general blanket statement is very
misleading, in the same way the PSK setting guidelines of no ALC = quality is really rig specific.

Yaesu's official recommendation (at least what they publish in the manuals) is to run at reduced power if the transmission lasts
"for more than a few minutes."  I never could understand that - but since I mostly contest or DX chase on RTTY, I don't send long
transmissions.  Never had a problem with the 2K or 5K.  Maybe I'm just living lucky?

73, Jeff ACØC
www.ac0c.com

-----Original Message-----
From: Phil Cooper
Sent: Wednesday, August 24, 2011 2:22 PM
To: rtty at contesting.com
Subject: Re: [RTTY] Key down & 50% power

Hi all,

Gedking (at) aol.com wrote:
Never run more than 50% power on RTTY It's like putting a Brick on your CW KEY

I guess that is a good general rule, but it does NOT apply to ALL radios!
When I used an IC756 and then an IC756Pro, I ran them at 100 watts in almost all contests.
They never got hot, and never faltered at all. I believe they were designed to run flat out on RTTY, so it was not a problem.
That is not the case for many Yaesu rigs though, which do need to be run at half-power.

I now have an IC7800, and I run that at half-power, not because it can't handle the full 200 watts, but mainly because I don't need
to run it flat out, but also because many contests have a low power section which is limited to 100 watts.

73 all

Phil GU0SUP






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