AT-11 not working

---------

From: Jeff M. Gold (JMG@tntech.edu)
Date: Sun Feb 16 1997 - 12:55:09 EST


> boy.. I about give up
>
> was real careful building the AT-11. check everything a number of
> times both before and after building it.
>
> when I power it on, seems like all the relays active. seems to be
> using about 250 ma or so.. but really can't tell.. then the relays
> go for about 2-3 seconds..then turn off and it seems to be drawing
> about 400 ma at that point.
>
> I tried disconnecting all the mods . still same.. same with 14 pin
> connector connected or not.. can't find any solder bridges.. used
> a high power magnifying glass. can't find any parts in wrong..
> pulled out one relay transistor.. it is fine.. they all measure
> ok.. pulled out U2? the near the processor.. still same thing even
> with it out of the board.
>
> any suggestions?
>
> help will be VERY appreciated.
> thanks
>
> Jeff


Search QRP-L Archives

[ QRP-L Archive | ]
[ 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 ]

---------

This archive was generated by hypermail 2b29 on Fri Jun 02 2000 - 11:33:00 EDT

kd4ab@kd4ab.org