[RTTY] re: RTTY power levels

[A.J. Cioffi]

50 watts for a 1000MP is where you should be.  I think it says that in the
owner's manual.  It's not meant to be run at 100 watts.  The last radio I
had that was capable of full duty cycle was an Icom 751A; and it even stated
that in the manual.  Certainly you can try creeping up to 70 or 80 watts at
the risk of the "Big Bake".  Then again is it worth the extra 30 watts?  I'd
use an amp and run the rig at 10 or 15 watts and let the amp do what it was
designed to do.  Just a suggestion.  See ya in the next contest.

Tony - N2KI
SYSOP - N2KI DX CLUSTER
dxc.n2ki.com:7300
RF Gateway 145.650
Website: www.n2ki.com
DX Spoken Here


> -----Original Message-----
> From: rtty-bounces at contesting.com [mailto:rtty-
> bounces at contesting.com] On Behalf Of f6irf at free.fr
> Sent: Thursday, 26 August, 2004 05:29
> To: rtty at contesting.com
> Subject: [RTTY] re: RTTY power levels
> 
> [RTTY] RTTY power levels
> from [Jim Martin - MM0BQI]
> 
> Hi Jim,
> Good question...
> 
> Depends if you are doing mainly S&P or CQ'ing... the duty cycle is not the
> same
> at all...
> The worst being CQ'ing for a while without reply ie 12s CQ message / 3
> seconds
> RX ... that's 80% overall duty cycle.
> In S&P, the duty cycle is much lower,let say only 20% or less and many
> transceivers  will cope with it without problem... (that's equivalent to
> CQ'ing
> in SSB).
> Other factor are too be considered, like ambient temperature (not the
> same if
> you are at peter-1st under a tent, or in XU without AC...).
> Also if you have a spare tranceiver... or if you can CQ in alternance with
> one
> or another (ie SO2R).
> In general additional fans will help: ie on the 706 I used before, 25W was
> the
> decent max for CQ'ing, going up easily to 60 with a simple flat fan
> blowing on
> the PA radiator...
> 
> Don't know for the FT1000, but personaly with my PROII I would not try
> CQ'ing
> for extended period at more than 50W... for search and pouncing, full
> power is
> no problem...
> But it is more a matter of personal feeling and general behavior. It may
> survive
> long CQ periods at full power, but I don't take the risk...
> (I also know hams who systematicaly blow-up something at each
> contest...)
> 
> 73's Patrick
> 
> 
> to:  "RTTY" <RTTY at contesting.com>
> Subject:  [RTTY] RTTY power levels
> From:  "Jim Martin - MM0BQI" <MM0BQI at blueyonder.co.uk>
> Date:  Thu, 26 Aug 2004 08:45:04 +0100
> List-post:  <mailto:rtty at contesting.com>
> 
> I am running an FT1000MP Mk5 at 40w output during rtty contests and the
> fan
> runs almost constantly and it gets hot. My understanding of the MP
> manual is
> that I can run it at 100w out for long periods but I am not too keen to do
> his! The second radio, IC7400 runs much cooler at 40w.
> I see from lots of posts that operators are running 100w output from
> standard rigs with great success and no damage, some guidance on this
> would
> be appreciated!
> Thanks
> Jim  MM0BQI
> 
> 
> 
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