DEC Equipment Wanted/Needed

[BitWiz]

H952-B (A-PL-H952-B-0) Stabilizers for H950/H960 Rack (the little feet that attach to the bottom of the rack to help keep them for toppling over when something pulled out.
FAN interface block for H950H960 rack to plug the top fan into.
DECTape Empty take up spool
DECTapes
-15V & +5 or +10V power supply for TU56
PC04 Paper Tape Reader/Punch
M840 Controller for PC04
TD8E (M868) or TC08 DECtape controller
RX28 (
Interrupt Time board (M883 or M883 or M8330 or M860) for use with Multi-OS or TSS-8
M933 boards/cables to connect the RK05 to the RK8E controller

 

[SteveG]

I can help if you need an RK05 Unibus Ribbon cable (see photo)

 

[BitWiz]

I can help if you need an RK05 Unibus Ribbon cable (see photo)

Steve,

Thank you for the offer. The cable I am looking for goes from the drive to the RK8E controller. It has "Berg" insulation displacement connectors on one end and a flip chip board on the other end.

 

[SteveG]

How many pins and what width. Here is a selection of DEC ribbon cables that may help.

 

[BitWiz]

The two cables are 40 pin ribbon cables terminated on one end with dual in line (2 rows of 20 pins) insulation displacement connectors. The other end is connected to the board as shown above.

Thank you.

 

[SteveG]

Two of the ribbon cables in the photo have 40 pins the larger one has 50 pins.

 

[BitWiz]

If I make some of Roland's M933 boards than I can use 40 pin ribbon cable with "berg" connectors on both ends.

 

[SteveG]

What width are the plugs you need?

 

[BitWiz]

What width are the plugs you need?

Here is a drawing of the cable:


The drawing for the pinouts:

 

[BitWiz]

 

[SteveG]

I can see the length but not the width in the drawings above. NB. in the cables I have the outer pins are Approx 2”apart.

 

[BitWiz]

The pins are on 0.100" centers.

https://www.digikey.com/en/products/detail/3m/4640-6001/138332 the female counter part for this.

 

[SteveG]

Looks good then 20 x 0.1 = 2

Do you want me to check the lengthen of the ribbon cables?

 

[BitWiz]

Steve,

I'm sorry but I'm a bit confused here. Do you have an M933 cable or do you have the parts to make one or am I just confused?

 

[SteveG]

I have 2 ribbon cables that look correct. I have no idea what part number they had/have.

 

[tradde]

Pictures would help. Your first picture above is just a Unibus connector cable. Not sure what the 2nd set are.

 

[BitWiz]

Pictures would help. Your first picture above is just a Unibus connector cable. Not sure what the 2nd set are.

Here is a picture of Roland Huisman's board that uses IDC connectors on both ends (note the DEC board as the cables soldered directly to the board [the first pic I sent you)]

 

[SteveG]

The 1st cable is about 10 ft long. The connectors look slightly different to the ones in your picture.

The 2nd cable is shorter about 6 ft long. NB. The connectors do not have location lugs hence the “This Side Up” paper label.

Photo:-

 

[BitWiz]

What is on the other end of the cables or are they terminated with the same connector on both ends?

 

[SteveG]

You can see both ends of the ribbon cable in the photos the rest of the ribbon cable is just a loop of lengths 10ft and 6ft respectively.