? for TS-570 owners

[KT4WO]

i have a ts-570 d/g and run on psk..i have heard the
fan run in the past..but..the last time i was on psk for awhile,, i put my hand on back of radio and it was
"el-scorch oh"(very hot)  
any word on fan or thermister failures
just got to hot...and fan never kicked in..
any ideas??
kt4wo@yahoo.com

[N3ZKP]

Are you running full power? That's probably your problem. turn the power down to 10 or 15 watts and the problem will go away. You don't need 100w for PSK.

Lon

[N3ZKP]

Sorry, I missed the questgion.

Don't know of any rash of failures, but anything is possible, especially if you have been running constant carrier modes at full power for extended periods of time.

[KT4WO]

was just running 25 watts as always,,,
never more...

[K0RFD]

I've never heard the fan come on when running PSK, but I have heard it come on running RTTY.  I assume this varies from individual rig to rig, but on mine it seems to come on pretty late.  If it comes on, I have only about 5 minutes or so before it starts folding back power (which it does for temperature just as well as SWR).

Basically, I think the temperature is set fairly high.

If the heat sink is getting hot, then maybe the heat sink is doing what it is supposed to do, sinking heat.  

I think there's a mod for getting the fan to come on sooner.  Instead of modding my radio, I just put a switch onto a 12v computer fan, wired it to my power supply, set it behind the radio, and I turn it on myself when I'm running lots of RTTY.