Yes, that's the one! Radio Shack catalog number 277-117. The IC
included in the kit was 74H103. Mine came already assembled when it showed
up in a box
full of parts I rescued from the local tech school when they closed up.
It is in rough shape. The builder decided to solder in sockets f
Radio Shack ASCII keyboard ?? Is that the one that doesn't have a RETURN
key (gotta use CTRL-M), but it does have a linefeed key ? I built a video
terminal with that in high school and was thrilled I could use a 300 baud
connection.
Switching to 74HC should reduce your power. I recall there was
Those B-7971 tubes cost between $10 and $12 at the time, which was 2000,
2001. There was an Ebay seller who sent them wrapped in newspaper.
OLD newspaper from 1968, 1970 era!I bought up a nice stock of them and
sockets. The plan at the time was that since my B-7971 display system
is of m
That's great! I remember seeing a picture or video that display - or one
very much like it.
I bought most of my B-7971 tubes between 2002 and maybe 2005, and I think I
paid $20-$30 each. A seller who seemed to have a LOT of them, would put
them into the shipping box in their original styrofoam
history is hard to find! I think they were on the order of $25 each in the
early 2000s. Although the inflation happened pretty regularly.
I was looking at some old posts from 2002, folks were discussing the
outrageous price of $800 for a box of 100 ZM-1040 tubes :)
On Saturday, May 25, 2024
How much were 7971's selling-for back in 2001, or whenever you got them ?
Today I see them around 200 USD; I paid 80 USD back in 2017 when I built my
8-tube clock.
Long ago, as in the 1970's, I think PolyPaks was selling surplus 2-tube
modules for 8 USD.
On Saturday, May 25, 2024 at 11:01:41 AM
