Front of the W684 intensity amplifier. This board converted the input TTL intensify pulse to the 62 volt signal needed to intensify a spot on the CRT. This board also support 8 levels of intensity through a 3 bit control signal. In units without the light pen the W682 board was used. It didn't support the multiple intensity levels but supported a single address line to allow control of two monitors from one point plot generator board set.
Feel free to contact me, David Gesswein djg@pdp8online.com
with any questions, comments on the web site, or if you have related equipment,
documentation, software etc. you are willing to part with. I am
interested in anything PDP-8
related, computers, peripherals used with them, DEC or third party, or
documentation.
