2. amps-preamps
  3. 155485-29485

Any Robertson Audio 4010 owners on Agon?

Hi, 

I was wondering if I can get some help. I recently purchased this classic Robertson 4010, which works great. 
However, I have noticed that it gets really hot after two hours , even when it is on only and you are not sending any signal thru it, the blue power on/off switch gets really hot to touch, is that normal, or shall I take it to have it properly checked out by a certified tech?
I am hoping someone here would throw some light on this. 

Many Thanks

Cheers 
audiomaster
rhljazz
1,250 posts
 
No experience with your amp, but on a product that old, it likely has a bulb in the switch instead of an LED.  The bulb will generate heat.  Another possible factor is the switch circuit.  The switch might be wired to full current rather than a relay circuit.  That will also make the switch warm.
roberjerman
4,319 posts
 
I too have a 4010. Presently in storage. Could be output stage bias drifting too high.
audiomaster OP
22 posts
 
rhljazz,

That is it, I am told by the original owner that amp has a bulb which generates lots of heat if left on for a long time.

Other then that, the amps sounds superb, super silent background,  smooth presentation, that perfect perfect detail, the tweeters "breath",  those bass notes that I thought never existed, that brilliant  control and timing of the musical notes, basically, all the musicians 'follow" the singer and play with him/her, my search for a power amp is over.

I would like to Thank once again to all of those who responded.

Cheers. 


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