e. Ain’t classic computers fun sometimes...
>
>
> From: Paul Anderson
> Sent: Saturday, March 30, 2019 3:26 PM
> To: Charles ; General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: H786 power supply help wanted
>
>
> Hi Charles,
>
> The H786 was standard
On 03/30/2019 07:50 PM, Charles via cctalk wrote:
Update: I removed the H786 from the chassis, and set it up on the workbench
with loads on the +5 and +12.
No output. 320V across the half-bridge, but no +12 Startup. Found I had
forgotten to put a cliplead to the primary of the startup
To: Charles ; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: H786 power supply help wanted
Hi Charles,
The H786 was standard for the 11/23, BA11-N. The H7861 was for the 11/23+,
BA11-S and had afrw more amps of +5 volts.
I would start by looking at the electronic caps.
I have a few
On 3/30/2019 2:25 PM, Charles via cctalk wrote:
> I have a PDP-11/23+ and the power supply (H786) "last ran when parked" a
> year or so ago. But there's no DC output at all today, and the fans are
> running so there is AC power...
> I also have the original H7861 that came with it, which had a
Hi Charles,
The H786 was standard for the 11/23, BA11-N. The H7861 was for the 11/23+,
BA11-S and had afrw more amps of +5 volts.
I would start by looking at the electronic caps.
I have a few extras here but am pretty busy for the next week or so.
Paul
On Sat, Mar 30, 2019 at 2:25 PM Charles
I have a PDP-11/23+ and the power supply (H786) "last ran when parked" a
year or so ago. But there's no DC output at all today, and the fans are
running so there is AC power...
I also have the original H7861 that came with it, which had a blown chopper
transistor. I couldn't find anything else
