BA11 power filter

Chris Zach cz at
Wed Jun 2 08:13:01 CDT 2021

Really? There is a 10a fuse in a round holder on the back of the rack, 
right by the plug input. Swapping the H786 power supply with another one 
results in a working unit for me, so I don't think the problem is in the 
power switch box.

Maybe you have a BA11-M? Is it a 4 slot chassis or 9?


On 6/2/2021 6:48 AM, Steve Maddison via cctalk wrote:
> On Tue, 1 Jun 2021 at 23:39, Chris Zach via cctalk
> <cctalk at> wrote:
>> Interesting: I just tried firing up a pair of BA11-N's to see if they
>> work. One blew the fuse in that block in the back and I thought it was a
>> shorted PS but the PS input caps are not shorted. I'll check to see if
>> the filter capacitor in that spot is shot.
> That is also interesting to me, that you have a fuse in there or even
> any visible components other than switches. Maybe they opted for more
> discrete components in other variations of the chassis (I can't
> actually find the BA11 designation on mine). My actual PSU also seems
> to be unscathed although I have not checked it thoroughly as yet.
> -Steve

More information about the cctalk mailing list