[1000mp] Very Hot Final Heatsinks

[Bill Axelrod]

Norm,

     One data point.  I have had my Mark V for about 4 or 5 years so far. 
On mine, the heat sinks get warm to the touch (I guess toasty is a good 
term) but never too hot to touch.  This has been constant since I got it and 
is based on CW operation at 200W and RTTY operation at 100 watts.

73...   Bill K3WA

----- Original Message ----- 
From: "Norm Bryant" <normbryant at charter.net>
To: <1000mp at mailman.qth.net>
Sent: Sunday, November 27, 2005 9:26 PM
Subject: [1000mp] Very Hot Final Heatsinks


>I purchased a new Yeasu FT-1000MP Mark-V in February of this year. The 
>radio has seen almost ten months of service. The final heatsinks have 
>always seemed to run extraordinarily hot but, just recently, I began using 
>PSK-31 mode. After a normal on/off QSO that went for approximately ten 
>minutes during which the cooling fan came on almost immediately, I measured 
>a heatsink temperature of 143 degrees on the second heatsink from the 
>outside. This is too hot to touch, and seems to me to be way out of line 
>with safe operating parameters. The Yaesu technical folks said they do 'get 
>a little toasty', but that has done little to convince me that this radio 
>is operating safely. In PSK, I'm usually running about 20-25 watts out. I 
>always stay on top of the SWR with both the built in meter and a secondary 
>meter. Cooling fan comes on within 30 seconds of beginning a transmission. 
>Output is solid, and signal reports are good. But, as far as I'm concerned, 
>anything that gets this hot should have been labeled with a 'cautio
>
> Is this a normal operation parameter for the 1000MP?
>
> Thanks,
> Norm
>
> ______________________________________________________________
> 1000mp mailing list
> Home: http://mailman.qth.net/mailman/listinfo/1000mp
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:1000mp at mailman.qth.net
>