[RTTY] Re: Mark V RTTY Power Levels

[Thomas Giella KN4LF]

I have the Mark V Field and run 100 watts regularly on long RTTY QSO's using AFSK. Actually I can run the output up to 125 watts before I get any ALC action. With 100 watts and no ALC indication I get very clean reports. 

My Mark V Field cooling fan runs at 100 watts but not continuously or excessively and that output power level is not a problem here. I see these posts talking about their rig getting hot to the touch and the cooling fan running allot but that's never been an issue with my rig. 

I wonder how some may have their rig set up. What I mean by that is that my Mark V Field sits on the desk top totally open and exposed with no nearby objects to interfere with proper air flow.

Personally I think a hot to touch heat sink on the Mark V just demonstrates that it's doing it's job at dissipating the heat generated by the PA finals.

Just my .02!

73,
Thomas F. Giella, KN4LF
Plant City, FL, USA
Grid Square EL87WX
Lat & Long 27 58 31 44N 82 09 51 98W
kn4lf at arrl.net

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  ----- Original Message ----- 
  From: Jim Martin - MM0BQI 
  To: RTTY 
  Sent: Thursday, August 26, 2004 3:45 AM
  Subject: [RTTY] RTTY power levels


  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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