Rig becomes hot

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HB9TUP
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Last seen: 2 years 9 months ago
Joined: 2012/05/11 - 20:44
Rig becomes hot

I tested WSPR yesterday on 20m and surprisingly noticed that after operating for one hour my rig (Kenwood TS-570DG) turns pretty hot on the back, although I run WSPR at only QRP 5W power. The tx/rx-ratio was a bit high at 50% tx/rx. However, we are talking about only 5W. The rig's fan was blowing for most of the time. I'm 100% sure that the nominal power was only 5W and not higher. I wonder if something is wrong with the rig's final stage of my seven year old rig.

Could anybody of you check if your rig also becomes hot around the final stage if you run WSPR for hours at 5W?