Apple II

I'm in the process of collecting parts to assemble my Apple 1 NTI PCB and I started to think about a keyboard.   I remembered I had an old Apple II+ keyboard in storage so I pulled it out to look at it.   I didn't have my phone handy while typing this but I found an image on google.    The lower keyboard in this image is the keyboard I have.  The encoder chip on mine is labled: TK-10 5732.  To me this looks like an aftermarket keyboard, maybe from a clone, mainly do the removable cover on the caps-lock key, but I'm no expert.

Hey all,

My shiny new (38-year old) Apple //e has a faulty 80-column card. The self-test shows

RAM* 0 0 0 0 0 0 1 0

...indicating that one of the RAM chips is bad. The question is...which one? My desoldering skills are basic at best and I'd like to avoid removing more chips than necessary. Here's a picture of the board:

Hello everyone

I've solved my first problem on this Apple II Europlus i'm trying to repair ; it used to have a 14Mhz clock (!)

Changing a 74S in the clock generatin made it 1Mhz again, it tok a while to figure to right one as this was not the most obvious one (linked to phase 0) but another one, the 4 bit counter.

NOw I have some (pal) video output ; garbage. :(  I've read all topics on this forum about this kind of issue before posting :) Some points to broken links, which does not help.

all, 

Hope I can get some help from the group.

I am debugging a Drive ][ I have where the spindle appears to the running at about half speed.

I haver verified that

               the belt is not slipping

               the spindle (big flywheel) spins freely withe belt removed

               the motor spins freely when not powered

               Adjusting VR1 (to both end points) changes the speed, but never lets me the speed correct (not even close)