Search found 248 matches

by OldIsNew
13 Jan 2020, 18:35
Forum: Workshop
Topic: Converting fujitsu leaf spring keyboard
Replies: 5
Views: 1088

Re: Converting fujitsu leaf spring keyboard

Fwiw, I cracked one of these (Q503A) open to find it already had diodes in it. The diodes definitely help. It's really just a matter of tracing out the matrix then and doing a Teensy type controller replacement. I've done this on a Fujitsu N860-2500-T111 board and a Data General 6242-A. On the Fuji...
by OldIsNew
24 Dec 2019, 08:24
Forum: Other external
Topic: Great/Interesting Finds
Replies: 22929
Views: 1407277

Re: Great/Interesting Finds

Dear Santa... https://www.ebay.com/itm/APPLE-1-Original-1976-Computer-System-1st-Steve-Jobs-built-computer/174122590219?_trkparms=aid%3D777001%26algo%3DDISCO.FEED%26ao%3D1%26asc%3D20160801204525%26meid%3D3ea3335300774ae18fb38e5a14b50184%26pid%3D100651%26rk%3D1%26rkt%3D1%26itm%3D174122590219%26pmt%3...
by OldIsNew
21 Dec 2019, 04:28
Forum: Workshop
Topic: ES 110 conversion
Replies: 5
Views: 377

Re: ES 110 conversion

Very cool! Like the look with that case. Nice work!
by OldIsNew
17 Dec 2019, 01:05
Forum: Keyboards
Topic: Alps Appreciation
Replies: 3406
Views: 186646

Re: Alps Appreciation

I was recently able to pick up a NOS Zeos branded NTC KB-6251/2. Turned out to have pine white Alps. The switches feel VERY nice. A_box_SM.jpg B_boxlabel_SM.jpg B_boxlabel_SM.jpg D_backlabel_SM.jpg E_board_SM.jpg F_switch_SM.jpg I have another pine white Alps board that was moderately dirty. I opene...
by OldIsNew
03 Dec 2019, 07:09
Forum: Workshop
Topic: Another KeyTronic F&F with CommonSense
Replies: 9
Views: 513

Another KeyTronic F&F with CommonSense

I recently came across Sangdrax's very nice write up of his General Rad KT F&F board - 1983 General Radio / Gen Rad LM2 (vintage tall keytronic) - and figured it was about time I tried CommonSense with one of my F&F boards too. Sangdrax covered things nicely in his post so I'm going to be fairly bri...
by OldIsNew
02 Dec 2019, 16:19
Forum: Workshop
Topic: VT100 converter for QMK without an extra UART
Replies: 1
Views: 192

Re: VT100 converter for QMK without an extra UART

Very cool. Interesting background info too. I have a VT100 that I brute forced with a Teensy - it's nice to see approaches that actually keep the boards intact!
by OldIsNew
02 Dec 2019, 14:59
Forum: Keyboards
Topic: DTK SPK-101 Keyboard
Replies: 7
Views: 480

Re: DTK SPK-101 Keyboard

... The NEC, meanwhile: even I’d give retrobright a chance on that! ... The NECs do seem to end up looking like bananas! I do have a NEC H410E that I did retrobright: NEC_H410E_a.jpg NEC_H410E_b.jpg The H412 in the video was in really bad shape, very dirty with at least a third of the switches not ...
by OldIsNew
02 Dec 2019, 06:34
Forum: Keyboards
Topic: DTK SPK-101 Keyboard
Replies: 7
Views: 480

Re: DTK SPK-101 Keyboard

Thanks for the feedback everyone and interesting info Polecat, thanks! For sure can't make broad statements based on one board. I did open up and clean all the switches on both boards and the switches did clean up nicely on both. The sound of the white Alps is for sure hard to beat and they feel ver...
by OldIsNew
01 Dec 2019, 22:45
Forum: Workshop
Topic: Foam & Foil Mini Monster - Phase 2: Ideation
Replies: 22
Views: 713

Re: Foam & Foil Mini Monster - Phase 1: Autopsy

I will need new foam for the board. I'm not exactly sure what to use if I DIY it. For past projects I bought pre-cut foam disks off ebay, but they were very pricey. This time I'd rather just cut my own. I presume I can use leather punches for this. I really love the old tall stem KeyTronic F&F boar...
by OldIsNew
01 Dec 2019, 02:52
Forum: Keyboards
Topic: DTK SPK-101 Keyboard
Replies: 7
Views: 480

DTK SPK-101 Keyboard

I didn't know much about this board, but liked the look and so picked it up. The board's case is stamped 1990, and it turned out to have white Alps switches. It has an AT connector and works fine with an AT to PS2 adapter and a $7 PS2 to USB converter. 1_Orig_SM.jpg 5_open_SM.jpg 6_caps_off_SM.jpg 2...
by OldIsNew
23 Nov 2019, 20:27
Forum: Keyboards
Topic: Keyboard Firmwares: a survey of controllers and converters
Replies: 15
Views: 690

Re: Keyboard Firmwares: a survey of controllers and converters

Very interested in seeing more! Thanks for working on this, very helpful idea to put a run down on things in one place.
by OldIsNew
20 Nov 2019, 06:09
Forum: Gallery
Topic: SMK Reed switches
Replies: 4
Views: 488

Re: SMK Reed switches

Very cool find!
by OldIsNew
12 Nov 2019, 22:53
Forum: Workshop
Topic: Removing, Disassembling and Cleaning NEC Blue Oval Switches
Replies: 6
Views: 1059

Re: Removing, Disassembling and Cleaning NEC Blue Oval Switches

I'm really encouraged to see that there is new progress on repairing these boards. Some prior threads, including my own repair from 2015, are here ... Interesting info thanks for posting! I also don't really like the idea of gluing the switches. I only glued two as an experiment using JB Weld Plast...
by OldIsNew
12 Nov 2019, 01:26
Forum: Workshop
Topic: Removing, Disassembling and Cleaning NEC Blue Oval Switches
Replies: 6
Views: 1059

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: 6
Views: 1059

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: 6
Views: 1059

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: 6
Views: 1059

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: 3965
Views: 251423

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: 2214

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: 1846

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 1054 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: 950

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: 2990

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: 1577

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: 1328

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: 1546

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: 1546

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: 2061

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: 1206

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...

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