Re: Replacement for Foam Filter for PDP 11/24

> On Sep 4, 2021, at 10:42 AM, Rob Jarratt via cctalk > wrote: > Another query. The foam filter that sits in the front of my 11/24 CPU is > clearly badly degraded and needs to be replaced. What do people replace this > kind of stuff with? I guess it mustn't be too fine, this mesh seems quite >

Replacement for Foam Filter for PDP 11/24

Another query. The foam filter that sits in the front of my 11/24 CPU is clearly badly degraded and needs to be replaced. What do people replace this kind of stuff with? I guess it mustn't be too fine, this mesh seems quite coarse. https://rjarratt.files.wordpress.com/2021/09/1124-front-panel-2

Re: VAX4000 VLC diagnostics/console

On 9/4/21 8:02 AM, Jay Jaeger via cctalk wrote: Also, I see that version 1.0c of the open source  Blue Pill version has a fix that involves TERMPOWER: "Fixed issue with external power and TERMPOWER". there is also a development discord for these little scsi adapters https://discord.gg/kx2Kybx2

Re: Capacitors on M8722 Board

On 9/4/21 4:34 AM, Rob Jarratt via cctalk wrote: I have a PDP 11/24 which I hope to power up soon. The last time it had power I noticed a bit of a burning smell which I failed to track down. However, I did notice one capacitor on a memory board has a strange appearance, almost as if there is some

Re: VAX4000 VLC diagnostics/console

> On Sep 4, 2021, at 6:34 AM, emanuel stiebler via cctalk > wrote: > > On 2021-09-04 08:30, Antonio Carlini via cctalk wrote: > >> "Digital Diggings" couldn't get BlueSCSI to work on either VAX or Alpha: >> https://www.youtube.com/watch?v=zFEh7owqHxU&t=36s. >> That's a pity as it's much chea

Re: VAX4000 VLC diagnostics/console

On 9/4/2021 5:44 AM, Adrian Graham wrote: On 4 Sep 2021, at 02:42, Jay Jaeger via cctalk > wrote: On 7/14/2021 12:32 PM, Adrian Graham via cctalk wrote: VT100 to the rescue, the VLC is fine talking to it so now I'm wondering why my old faithful hardware UART in

Re: VAX4000 VLC diagnostics/console

On 2021-09-04 08:30, Antonio Carlini via cctalk wrote: > "Digital Diggings" couldn't get BlueSCSI to work on either VAX or Alpha: > https://www.youtube.com/watch?v=zFEh7owqHxU&t=36s. > That's a pity as it's much cheaper than SCSI2SD. OK guys, but please compare that to costs for SCSI drives (plea

Anyone Have the H9642 Enclosure Maintenance Manual EK-187AA-MG

I have looked on Manx and on Bitsavers and I don't see it there. Thanks Rob

Re: VAX4000 VLC diagnostics/console

On 04/09/2021 02:42, Jay Jaeger via cctalk wrote: On 7/14/2021 12:32 PM, Adrian Graham via cctalk wrote: VT100 to the rescue, the VLC is fine talking to it so now I'm wondering why my old faithful hardware UART in this PC I'm typing on now has let me down. The BlueSCSI appears as 7 devices th

Re: VAX4000 VLC diagnostics/console

> On 4 Sep 2021, at 02:42, Jay Jaeger via cctalk wrote: > > On 7/14/2021 12:32 PM, Adrian Graham via cctalk wrote: >> VT100 to the rescue, the VLC is fine talking to it so now I'm wondering why >> my old faithful hardware UART in this PC I'm typing on now has let me down. >> The BlueSCSI appea

Re: Capacitors on M8722 Board

On Sat, Sep 4, 2021 at 10:35 AM Rob Jarratt via cctalk wrote: > I lifted it to measure its capacitance and ESR. It measures about 80uF and With a lot of capacitance meters, a leaky capacitor will read high. So that may explain why it's reading 80uF > the ESR seems OK. I am unsure whether to rep

Capacitors on M8722 Board

I have a PDP 11/24 which I hope to power up soon. The last time it had power I noticed a bit of a burning smell which I failed to track down. However, I did notice one capacitor on a memory board has a strange appearance, almost as if there is some corrosion under the surface, it doesn't seem to be