Different manufacturers used different numbering schemes.
C might mean "consumer" temperature range. Or it might not.
You can check each mfr's data sheet to see exactly what the letters
mean for that mfr.
With the 4000 series chips, the important thing is whether or not
you want a B (buffered) part. The original chips did not have a B
at the end, and were not "buffered" so they had less drive capability.
After some years, most parts were available in B versions, and those
are the parts you normally find. Also, Motorola added a "1" in front,
so another company's CD4008 might be their 14008, just to add to the
confusion. To make things even worse, later on, some of the 4000-series
parts were made in 5V-only versions with numbers like 74HC4017.
Many of the 4000-series parts are still available brand new, BTW,
from Digikey and Mouser, so you don't have to get them from ebay.
To minimize the wear and tear on the pcb, the preferred technique
for removing a chip is to cut the leads right at the body with small
"nippy cutters" or diagonals. Then remove the body and desolder
each lead by itself while pulling it out with tweezers. Then clean
both sides of the pcb with isopropyl, install an IC socket, and the
new chip. Best to use a socket as these old pc bds can't take a lot
of de-soldering without damage. If the new chips fails, you want to
be able to replace it without messing with the pcb traces again.
There may be special cases where you wouldn't want to use an IC
socket, like some kind of high-frequency chip, but most chips in an
analog synth should be fine in a socket.
--------------------------------------------
On Wed, 8/24/16, 7zlwncpbis4x22jwvkd4oc5hzu2njcsjeup42is6@yahoo.com [PolySix] <PolySix@yahoogroups.com> wrote:
Subject: [PolySix] Re: Trying to Restore a P6.
To: PolySix@yahoogroups.com
Date: Wednesday, August 24, 2016, 3:06 PM
The first thing I checked on IC 23 was the inputs,
and they checked fine, but will check them again before
purchasing a new IC. And the two outputs come within 2
thousandths of an ohm resistance of each
other.Do I need
a replacement with the exact suffix letters? I see 14011
BCPs on E-bay, whereas the chip in the P6 has only BP as the
suffix.
If any other
points I should check occur to you, please let me
know.Thanks again for the pointers. Very excited
that I may have a handle on this.