IBM 3104 Display Terminal

seebart · 28 Dec 2014, 15:32

nothing new here this keyboard is in our wiki and I´m sure it has been covered here at some point.This has been sitting in my basement since I bought it this year with in a mini group buy with halvar and andrewjoy. I have some time now so I decided to take a look inside. Obviously this has been used in a commercial setting, the sticker on the bottom case reads "WGZ Düsseldorf" which is a bank.I´m not sure if that is corrosion on the plate or what it is and how to deal with it.Oddly the pcb looks fine.I tried saving the mat, no chance. I will have to make a replacement. I love the fact that the terminal manual comes with the keyboard and has it´s own compartment. A small sticker on the inside of the 3178 Keyboard WSE Maintenance Information. The overall feel of this Model F is more AT than XT.

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Halvar · 28 Dec 2014, 23:47

I don't know what it is either, but it looks like a similar kind of corrosion to what we had on the beam spring keyboards from the same seller. I haven't opened my F boards from this seller that you proxied to me yet, but I'm not surprised.

andrewjoy · 29 Dec 2014, 00:27

mine was not that bad, the back was ok almost clean but the top plate was like this, i however had a spare top plate

seebart · 29 Dec 2014, 11:20

this is a situation where household cleaning utensils will not get the job done. Time for Mr sandpaper to join the project:

Halvar · 29 Dec 2014, 12:25

If you want to walk the chemical way: some acid, for example vinegar, will get the job done, too.

seebart · 29 Dec 2014, 14:06

Yeah thanks for the tipp. I went the manual way on the plate, quite a tough job sanding this by hand! I think I'll go the chemical way with the barrel.

Muirium · 29 Dec 2014, 14:07

Yup, don't scratch it up much! I used Hammerite Rust Remover Gel to tackle my beamspring from this guy. It's powerful, and will eat through plastic so watch out with that too. You don't need very much of it though, and it's way less work than getting busy with scratchy stuff. You can leave that to wherever gel or vinegar is too risky to use.

seebart · 30 Dec 2014, 16:44

so I got the barrel looking somewhat clean. I soaked in vinegar and did a little sanding. I´ve been reading the Replacement Foam Mat for IBM Model F Keyboards? thread since I need to cut a replacement mat or try those o-rings, which I find an quite interesting option.

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Khers · 30 Dec 2014, 16:45

Looking nice, seebart! O-rings for model Fs does indeed sound interesting! Care to share a link?

seebart · 30 Dec 2014, 16:47

Khers wrote: ↑Looking nice, seebart! O-rings for model Fs does indeed sound interesting! Care to share a link?

you mean links to buy some? I meant our own thread here:

http://deskthority.net/keyboards-f2/rep ... ment%20mat

btw I am not very knowledgeable about IBM Terminal caps but I don´t recall ever seeing a legend like this:

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Khers · 30 Dec 2014, 17:03

Sorry, got a bit too excited at the thought of using o-rings as a foam mat replacement for a model F, so I didn't quite read your post carefully enough!

seebart · 30 Dec 2014, 17:04

well fellow users here have tried apparently as you can read in the thread. Seems to work. I think that´s a little exciting.

Khers · 30 Dec 2014, 17:06

Yeah, I browsed the thread quickly and it seems that the issue is finding soft enough o-rings.

seebart · 30 Dec 2014, 17:08

right I might ask them how it works before buying some. Cutting a mat should not be that difficult, more so choosing the right material and the correct thickness of the foam.

Another thing I just noticed now: no feet on this keyboard! Look at my picture of the bottom case. There are some holes in that area where the feet would be.

Redmaus · 01 Mar 2015, 06:46

This keyboard has a huge controller board! The blue switch would be useful if you wanted to have a piezo clicker and wanted to use it as a on/off switch.

I also found this incase someone wants this keyboard:

http://www.recycledgoods.com/ibm-564099 ... board.html

seebart · 01 Mar 2015, 12:28

Yes the controller is big on this one. I'm still looking for the right foam for a mat.

Firebolt1914 · 01 Mar 2015, 16:00

From what I've heard, the blue switch initiates a quieter click. Is that true, or am I thinking of another keyboard?

seebart · 01 Mar 2015, 16:40

Firebolt1914 wrote:From what I've heard, the blue switch initiates a quieter click. Is that true, or am I thinking of another keyboard?

Since I've never had mine in operation I can't tell you but as you can see in my picture there are letters next to the switch, so it could be a upper lower case function.

On another note look how nice the IBM badge is on this one. Redmaus where are you?[emoji6]

Muirium · 01 Mar 2015, 16:51

seebart wrote: ↑so it could be a upper lower case function.

It is. Flip the switch, and the display goes all caps. It's not a caps lock in the ordinary sense but something deserving a big blue switch away from the keyboard!

As for boards that change their volume by a switch, Firebolt, perhaps you're thinking of solenoids or beepers? I'm all but certain there are no dyncamically configurable switch mechanisms in old boards, so instead such matters were about adding extra sound rather than removing it.

Firebolt1914 · 01 Mar 2015, 18:00

Guess I was thinking of something else, thanks for the info

Redmaus · 01 Mar 2015, 18:27

seebart wrote: ↑

On another note look how nice the IBM badge is on this one. Redmaus where are you?[emoji6]

[/quote]

Oh my... Is that the 2cm size one or the Inch size badge?

How did you make the photo like that? What camera do you Use?

seebart · 01 Mar 2015, 18:32

That's the one inch badge. For super close ups like that my nexus 5 camera is actually not too bad.

Redmaus · 01 Mar 2015, 20:59

seebart wrote: ↑That's the one inch badge. For super close ups like that my nexus 5 camera is actually not too bad.

That is a really nice picture, especially for just a phone camera.

I have some pictures, taken from a model M 122 key bolt mod that I am working on. Should I start a separate thread? or just share them here?

elecplus · 02 Mar 2015, 00:29

Those feet, I have them here. The foam looks like what is in the old Selectric typewriter. It is like the foam used in aquarium tanks as filter material; not quite as dense as the sound proofing foam.

seebart · 02 Mar 2015, 08:15

Redmaus wrote:
seebart wrote: ↑That's the one inch badge. For super close ups like that my nexus 5 camera is actually not too bad.
That is a really nice picture, especially for just a phone camera.

I have some pictures, taken from a model M 122 key bolt mod that I am working on. Should I start a separate thread? or just share them here?

Either way is fine with me, but starting your own thread would be better.

So you've got those feet for sale elecplus?

elecplus · 02 Mar 2015, 17:54

Feet and foam

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seebart · 02 Mar 2015, 17:57

thanks for the pictures, give me some time and I´ll get back to you. I am definitely interested though!

Redmaus · 02 Mar 2015, 20:30

Here is a pic I liked from the back a Model M 122 key Membrane plate

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Here is a close up of the membrane

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Neat Logo Close Up

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I only edited the light settings on the membrane image, the rest I left alone only to resize in order to be able to upload.

I have a lot of neat model M hammer pictures too, if anyone wants to see those.

seebart · 02 Mar 2015, 20:37

Nice pictures Redmaus, that membrane plate picture might be header material.

Halvar · 02 Mar 2015, 20:51

Yes, I had the same thought when I saw this. On the other hand, let's not get into the business of celebrating membranes, the cheapos of the keyboard world!