Hi all,

 

I have a an 857d that has been exhibiting a couple of strange symptoms.

 

First it seems that perhaps some relay keeps getting stuck, as after some amount of normal operation (primarily cw or digital modes) the unit starts to get and stay hot in receive. It seems to be drawing about 200ma additional when this happens.

 

This also seems to be coupled with an increase in receiver noise on most (but not all) bands. It's most obvious on 17m and 15 m.

 

Power cycling the radio seems frequently get it out of this state but not always, as does running the relay cleaning process.

 

Has anyone else experienced these symptoms before?

 

Thanks,

Greg N1TR 

 

 

Another note in this in case anyone happens to see it, the additional 200-300ma draw in receive actually happens when the internal speaker output rises above some level, either due to increasing the RF gain OR increasing the audio level / gain. 

 

After that happens the extra draw persists until next power cycle OR until headphones are plugged into the head unit ,and the 8 volt regulator becomes quite hot after the draw increases. 

 

Any thoughts on which components may be involved in causing this to happen would be appreciated.

 

Thanks,

Greg N1TR