Search found 234 matches

by OldIsNew
Today, 01:26
Forum: Workshop
Topic: Removing, Disassembling and Cleaning NEC Blue Oval Switches
Replies: 5
Views: 331

Re: Removing, Disassembling and Cleaning NEC Blue Oval Switches

I've finished dissembling, cleaning and reassembling all of the the switches on the board, resoldered them and am now using the board. The switches are all working and feel good! This board was a mess when I got it with at least a third of the switches not working at all, and most of the rest feelin...
by OldIsNew
08 Nov 2019, 03:34
Forum: Workshop
Topic: Removing, Disassembling and Cleaning NEC Blue Oval Switches
Replies: 5
Views: 331

Re: Removing, Disassembling and Cleaning NEC Blue Oval Switches

As an update, I have tried gluing switches closed using JB Weld Plastic Bonder and it worked well. I tried both a dab of the plastic epoxy on the pegs before reattaching the top as well as dabbing some over the pegs after closing the tops and both methods have worked well. I have placed and pulled k...
by OldIsNew
04 Nov 2019, 04:07
Forum: Workshop
Topic: Removing, Disassembling and Cleaning NEC Blue Oval Switches
Replies: 5
Views: 331

Re: Removing, Disassembling and Cleaning NEC Blue Oval Switches

A side note on how the switches work. If you test continuity on the switch plate while out of the switch body, you will find the switch is closed. If you press on the leaf on the front of the switch (A in picture below) it moves the "T" contact on the back (B) off the contacts from the pins (C&D) an...
by OldIsNew
03 Nov 2019, 23:09
Forum: Workshop
Topic: Removing, Disassembling and Cleaning NEC Blue Oval Switches
Replies: 5
Views: 331

Removing, Disassembling and Cleaning NEC Blue Oval Switches

I recently picked up a NEC APC-H412 board with NEC blue oval switches that was in pretty rough shape. At least a third of the switches didn't work at all and the rest were rather scratchy. I figured this would be a good board to have a go at trying to desolder and clean the switches. Removal of the ...
by OldIsNew
30 Oct 2019, 20:34
Forum: Keyboards
Topic: IDENTIFY THE KEYBOARD thread
Replies: 3858
Views: 225367

Re: IDENTIFY THE KEYBOARD thread

Anything worth shelling out for in this picture? The green keys' colour (top right) is reminiscent of Cherry TA boards, but everything else about those board seems rather un-Cherry. Bottom right? On the top left, the F-XT is obvious, with a cheap (?) F-AT clone beneath it (possibly Alps or MX-clone...
by OldIsNew
30 Oct 2019, 04:04
Forum: Workshop
Topic: NMB Hi-Tek 111262
Replies: 2
Views: 1142

Re: NMB Hi-Tek 111262

I like it! That's a fun looking little board and I do love those switches.
by OldIsNew
30 Oct 2019, 02:20
Forum: Keyboards
Topic: Key Tronic Corp. Early '70s Keyboard
Replies: 14
Views: 1192

Re: Key Tronic Corp. Early '70s Keyboard

MightyFrame wrote: ↑
Well, I have found some new information on this keyboard...and immediately thought to share it here...

https://www.instructables.com/id/Fridge ... -Keyboard/


Dr-Smith.jpg
Dr-Smith.jpg (33.19 KiB) Viewed 400 times

What else can you say really?
by OldIsNew
28 Oct 2019, 04:44
Forum: Workshop
Topic: HP 2645A keyboard USB conversion
Replies: 1
Views: 375

Re: HP 2645A keyboard USB conversion

Nice work!
by OldIsNew
24 Oct 2019, 21:30
Forum: Workshop
Topic: Out with the old, in with the new.
Replies: 16
Views: 1689

Re: Out with the old, in with the new.

Nice!
by OldIsNew
22 Oct 2019, 22:55
Forum: Keyboards
Topic: what connector is this???
Replies: 5
Views: 870

Re: what connector is this???

I have a very similar board, a Fujitsu N860-2500-T111. Similar type connector. I couldn't find any existing protocol converter then (and am not aware of any currently) and so ended up doing a controller replacement using the Teensy2.0++. I posted more details including the keyboard matrix and the IC...
by OldIsNew
20 Oct 2019, 05:08
Forum: Workshop
Topic: Chyron 4046 (Super Scribe) Keyboard, Xwhatsit USB
Replies: 3
Views: 717

Chyron 4046 (Super Scribe) Keyboard, Xwhatsit USB

I love big old boards, and this qualifies. It's a sibling of the Chyron 4044 as reviewed by Chyros. The 4044 has three additional keys to the left of the alphas. The PCB in this board has the pads and traces and the PCB frame has openings for these keys, but alas, the front of the case does not. It'...
by OldIsNew
13 Oct 2019, 20:45
Forum: Workshop
Topic: Perkin-Elmer 7300 Clean Up and Teensy
Replies: 3
Views: 839

Re: Perkin-Elmer 7300 Clean Up and Teensy

Lookin good, btw, how heavy are these switches? Those in my TI Terminal are very light Thanks! I'd say the switches on this board are on the heavy side. They do actuate pretty high up but feel fairly heavy when bottoming out. Swabbing on a plastic safe silicone spray lube did help with the famous s...
by OldIsNew
12 Oct 2019, 20:39
Forum: Workshop
Topic: Perkin-Elmer 7300 Clean Up and Teensy
Replies: 3
Views: 839

Perkin-Elmer 7300 Clean Up and Teensy

I thought this was an interesting looking board. The switches are Hi-Tek High Profile, but I figured what the heck. Couldn't find any date stamps. orig_SM.jpg back_orig_SM.jpg Case_label_SM.jpg Opened it up. A very roomy, mostly empty case. open1_SM.jpg PCB: Front_Keys_SM.jpg KeysOff_SM.jpg PCB_back...
by OldIsNew
09 Oct 2019, 22:02
Forum: Workshop
Topic: Best replacement foam for keytronic foam and foil switches
Replies: 11
Views: 1349

Re: Best replacement foam for keytronic foam and foil switches

I've replaced the pads on a number of boards with polyurethane cushion foam, a Mylar emergency blanket and Elmer's Craft Bond glue. It's a softer foam and I personally like the feel. I've done 7 or 8 boards now using about half of one of the two foam pads that came in the $11 package I bought and ma...
by OldIsNew
07 Oct 2019, 20:14
Forum: Workshop
Topic: Another Data General 6246-A
Replies: 1
Views: 628

Another Data General 6246-A

I picked this up a while ago and finally got around to working on it. I've seen some others on here and thought they looked pretty cool. This one is also a Fujitsu 3rd gen leaf spring, so hopefully that means they all are. It was in pretty good shape. Case_Front_Orig_SM.jpg Case_Back_Orig_SM.jpg Ope...
by OldIsNew
03 Oct 2019, 06:39
Forum: Other external
Topic: Great/Interesting Finds
Replies: 22745
Views: 1328436

Re: Great/Interesting Finds

Keytronic Magnetic Reed (?) https://www.ebay.com/itm/Dynapath-CNC-Keyboard-for-System-5CM-Control/311841917766 Yes it should be, I picked one up a while back: https://deskthority.net/viewtopic.php?f=2&t=17582&hilit=keytronic I think I paid about $20. Though this one looks really nice, the asking pr...
by OldIsNew
27 Sep 2019, 02:46
Forum: Keyboards
Topic: NEC APC-H410E Keyboard
Replies: 0
Views: 1219

NEC APC-H410E Keyboard

Nothing new, but I picked up this board for not a lot and really like it. I saw that Brutal posted a nice write up of his NEC APC H-412 restoration ( https://deskthority.net/viewtopic.php?f=2&t=22609 ) just last month. I don't see much difference between the boards other than my H410 AT connector is...
by OldIsNew
19 Jan 2019, 04:27
Forum: Workshop
Topic: Sperry UTS-400 Cleaning and Conversion
Replies: 17
Views: 1394

Re: Sperry UTS-400 Cleaning and Conversion

It looks like I've lost a disk because there are only 112 here, but there are 113 keys. I guess I can just find some thin plastic packaging and punch a new one out of it. No big deal... I also started to clean the traces on the PCB. I used 91% isopropyl and cotton swabs, but it doesn't look like it...
by OldIsNew
11 Jan 2019, 02:35
Forum: Keyboards
Topic: IDENTIFY THE KEYBOARD thread
Replies: 3858
Views: 225367

Re: IDENTIFY THE KEYBOARD thread

JP! wrote:
10 Jan 2019, 21:55
I've seen this switch somewhere before but not in person. I love how thick those keys are though.
Interesting board - it looks similar to a Televideo board but different enough that don't know! Does look like Futaba switches - like the Televideo.

jp1.jpeg
jp1.jpeg (119.38 KiB) Viewed 1463 times
Televideo_804_small.jpg
Televideo_804_small.jpg (317.16 KiB) Viewed 1463 times
by OldIsNew
10 Jan 2019, 01:56
Forum: Keyboards
Topic: So I broke my Model M by cleaning it...
Replies: 11
Views: 1017

Re: So I broke my Model M by cleaning it...

High time you tackled a bolt-mod. Strip it completely apart and dust off / wipe down / and/or scrub with soapy water each individual part and put it all back together using the sandy55 method. Considerable work but that is the ultimate upgrade to a Model M... Sorry for your troubles! But for sure i...
by OldIsNew
09 Jan 2019, 04:57
Forum: Workshop
Topic: [Help] How do you guys trace a keyboard PCB that has diodes?
Replies: 3
Views: 504

Re: [Help] How do you guys trace a keyboard PCB that has diodes?

What I've typically done is hold one of the multimeter probes on the leg of the diode leading to the controller components, instead of the switch terminal - that way can still use the continuity testing mode with the beep, rather than having to worry about the polarity and watching the multimeter sc...
by OldIsNew
05 Jan 2019, 00:32
Forum: Workshop
Topic: Sperry UTS-400 Cleaning and Conversion
Replies: 17
Views: 1394

Since the original foam on the boards I have was mostly degraded, it's hard to be certain, but from what I can tell, it does seem to be a fairly soft open cell foam. I've been using an open cell polyurethane foam with good results. The keys are, of course, linear and the majority of the force felt w...
by OldIsNew
04 Jan 2019, 03:16
Forum: Workshop
Topic: wcass' Compact SSK: a review, reverse engineer, teardown, geek-out.
Replies: 45
Views: 3550

Wow. What else can you say but nice!!
by OldIsNew
02 Jan 2019, 04:34
Forum: Workshop
Topic: Sperry UTS-400 Cleaning and Conversion
Replies: 17
Views: 1394

There is a clear plastic disk under the foam that snaps into place under clips on the white plastic slider portion of the switch. What I have been doing is using a tooth pick or small jewelers screwdriver to pop the disk/foam/foil sandwich out of the slider. I clean the disks in IPA and reuse them. ...
by OldIsNew
30 Dec 2018, 20:02
Forum: Workshop
Topic: Sperry UTS-400 Cleaning and Conversion
Replies: 17
Views: 1394

Yea vintage KeyTronic F&F, nice. I love these boards, though they've gotten a bad rap - I think because of the short stem version which is awful- but I think the tall stem "vintage" boards are really nice. If you want to convert it to use on a Windows PC it's not difficult, but can be tedious. I've ...
by OldIsNew
29 Dec 2018, 07:11
Forum: Keyboards
Topic: Anyone in Italy? Go rescue those beams man!
Replies: 41
Views: 2604

You get the supermodel(s) after the beamsprings are rescued. Deal? If you can restore those beamers to working condition those supermodels will be bashing down your door (that's how it works in my mind anyway.) Fine. I was just trying to help but I can see it's not appreciated! So don't fly me to I...
by OldIsNew
29 Dec 2018, 05:24
Forum: Workshop
Topic: Sperry UTS-400 Cleaning and Conversion
Replies: 17
Views: 1394

Oh that's a nice board! It looks similar to a DEC VT100 Hi Tek board - but is it KeyTronic F&F ? If so, its fairly straight forward to do. Or if its a Hi Tek high profile like the DEC VT100, it's still not hard but takes a different approach. Would be happy to try to help if I can.
by OldIsNew
29 Dec 2018, 04:54
Forum: Keyboards
Topic: Anyone in Italy? Go rescue those beams man!
Replies: 41
Views: 2604

And another 5 grand so you can have an Italian super model escort. ;) I love the idea of saving these keyboards, but realistically they are completely trashed. In that condition they are just scrap metal. No mike5787! Keep your eyes on the prize! Mr. Nobody is right! With just that little extra mon...

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