Old DEC Power Control 861C
icipasla at gmail.com
Sun Dec 27 12:29:42 CST 2009
Old DEC Power Control 861C Hi,
looks like I am not getting the posting in my e-mail but my messages do get
I found this replyto my previous message by Tony Duell
To follow-up, the 861C emits a crackling noise for the first few seconds (20
or so) and then I can hear a relay chattering (very noisy!).
Also the light on the front panel is flashing continuously (maybe that's
*>* On December 18, 2009, Normand Fisher wrote:
*>* > Hi Mike,
*>* > I have an old 861C (and a 874A) which are very noisy and trigger off
*>* > after a short period under load. Would you, by chance, have a copy of
*>* > the schematics?
*>* > Or matter of fact any knowledge as to the cause of noise(old capacitors?
*>* > ...).
*>* Your best bet wouls be to post to Classiccmp Classiccmp mailing list at
*>* cctalk at classiccmp.org.
The DEC power cotnrollers are _very_ simple inside, and you don't really
need tjhe printsets to repair them.
I am not sure I understand the fault description. In particular, what
sort of noise (hum, chattering relay?). And what do you mean by 'trigger
off'. Do you mean the contactor drops out, or the breaker trips, or what?
Let me know exactly what happens and I might be able to help.
More information about the cctech