How to install Qbone?

[Robert Myers]

I'm having difficulty with installing Qbone into my 11/83's BA23 bsckplane.  For some reason, no matter how much pressure I put on the handles, it won't go into the backplane slots.  Is there a trick to doing this?  I can wiggle grant continuity boards into the slots, but there isn't any wiggle room for the 4-wide board.

[Mark Matlock]

Robert, 

      I’ve had some trouble in the past seating QBones into certain backplanes. The widths of the four edge connectors that slide into the back plane are really tight.

    I took a grant card that easily slipped into the back plane and measured the width of the connector with a digital micrometer. The QBone fingers were a few thousands wider than the grant card fingers. I then took a flat file and very carefully filed the side of the connector watching to not remove more of the circuit board material than absolutely necessary. Not all of the 4 connectors may need anything removed. The micrometer measurement can guide you on where things are too tight.

It helps if you have a backplane that is not in a chassis to better see where the edges are rubbing. Eventually, I was able to get the fingers to slide in without a huge amount of force.

   Also, if you have some “Deoxit” to spray on the fingers that can help to provide a bit of lubrication as well as improving the electrical connection. Sometimes a backplane has some minor oxidation on the contacts that make the insertion more difficult as well as possibly poor connection.

Best,

Mark

On Mar 5, 2024, at 3:18 PM, 'Robert Myers' via UniBone <uni...@googlegroups.com> wrote:

I'm having difficulty with installing Qbone into my 11/83's BA23 bsckplane.  For some reason, no matter how much pressure I put on the handles, it won't go into the backplane slots.  Is there a trick to doing this?  I can wiggle grant continuity boards into the slots, but there isn't any wiggle room for the 4-wide board.

--
You received this message because you are subscribed to the Google Groups "UniBone" group.
To unsubscribe from this group and stop receiving emails from it, send an email to unibone+u...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/unibone/dc655445-dc54-46e2-9403-8c2b5d2642d2n%40googlegroups.com.

[Steven Hirsch]

On Tue, 5 Mar 2024, Mark Matlock wrote:

> Robert,       I’ve had some trouble in the past seating QBones into certain backplanes. The widths of the four
> edge connectors that slide into the back plane are really tight.

>     I took a grant card that easily slipped into the back plane and measured the width of the connector with a
> digital micrometer. The QBone fingers were a few thousands wider than the grant card fingers. I then took a flat
> file and very carefully filed the side of the connector watching to not remove more of the circuit board
> material than absolutely necessary. Not all of the 4 connectors may need anything removed. The micrometer
> measurement can guide you on where things are too tight.

>
> It helps if you have a backplane that is not in a chassis to better see where the edges are rubbing. Eventually,
> I was able to get the fingers to slide in without a huge amount of force.

>
>    Also, if you have some “Deoxit” to spray on the fingers that can help to provide a bit of lubrication as well
> as improving the electrical connection. Sometimes a backplane has some minor oxidation on the contacts that make
> the insertion more difficult as well as possibly poor connection.

I'll remember this for next around. Those with sensitive natures should
avert their eyes, but my solution for inserting the QBone involves laying
a short length of 1x2 pine against the outer edge and tapping with a
rubber mallet. If you are careful it will apply force only to the board
and not the BBB.

>
> Best,
> Mark
>
> On Mar 5, 2024, at 3:18 PM, 'Robert Myers' via UniBone <uni...@googlegroups.com> wrote:
>
> I'm having difficulty with installing Qbone into my 11/83's BA23 bsckplane.  For some reason, no
> matter how much pressure I put on the handles, it won't go into the backplane slots.  Is there a
> trick to doing this?  I can wiggle grant continuity boards into the slots, but there isn't any
> wiggle room for the 4-wide board.
>
> --
> You received this message because you are subscribed to the Google Groups "UniBone" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to
> unibone+u...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/unibone/dc655445-dc54-46e2-9403-8c2b5d2642d2n%40googlegroups.com.
>
> --
> You received this message because you are subscribed to the Google Groups "UniBone" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to
> unibone+u...@googlegroups.com.
> To view this discussion on the web visit

> https://groups.google.com/d/msgid/unibone/1C6D7AB9-B179-4E93-A6CE-02797C628124%40matlockfamily.com.
>
>

[Joerg Hoppe]

Same here. I feel the QBUS contact springs much stronger than UNIBUS
flip chip slots.

Had in fact to "hammer" QBone into my uVAX too ...

Joerg

[Steven Hirsch]

On Wed, 6 Mar 2024, Joerg Hoppe wrote:

>> I'll remember this for next around.  Those with sensitive natures should
>> avert their eyes, but my solution for inserting the QBone involves laying a
>> short length of 1x2 pine against the outer edge and tapping with a rubber
>> mallet.  If you are careful it will apply force only to the board and not
>> the BBB.
>
> Same here. I feel the QBUS contact springs much stronger than UNIBUS flip
> chip slots.
>
> Had in fact to "hammer" QBone into my uVAX too ...

Now I feel relieved. Didn't want to be seen as treating the QBone in a
barbaric manner!

[Robert Myers]

guess I''m going to home depot to get some wood and a rubber mallot...:-)

[Robert Myers]

For those of you that have done this -- did you put the wood on the handle(s) and tap it, or on the board between the handles?

I picked up a rubber mallet and a couple of 1" x 2" pieces of wood today and want to know how to proceed.

[Tony Smith]

https://seshpsychedelicstore.com/                                                                                                                                                                                                                                            How is LSD used?
LSD is usually swallowed or dissolved under the tongue, but it can also be sniffed, injected or smoked                                                                                                                                                                                                                                                     https://seshpsychedelicstore.com/                                                                                                                                                                                                                                                 LSD belongs to a group of drugs known as psychedelic when small doses are taken, it can produce mild changes in perception, mood and thought. Larger doses may produce visual hallucinations and distortions of space and time.                                                                                                                                                                    https://seshpsychedelicstore.com/                                                                                                                                                                                                                                 Sometimes, Buy LSD can actually be other chemicals such as or the 2C family of drugs (part of the new psychoactive substances these can be quite dangerous, as their quality is inconsistent. Taking too much of these other substances can be fatal with a number of deaths having been reported                                                                                                                                                                                                                                                         The most common form is drops of LSD solution dried onto gelatin sheets, pieces of blotting paper or sugar cubes, which release the drug when swallowed. LSD is also sometimes sold as a liquid, in a tablet or in capsules.                                                                                                                                                                                                                                                https://seshpsychedelicstore.com/