I think I have found a possible cause, but not too sure what to do about it
if I have.
I had to replace the 7812 regulator that supplies Vstart. The new one has an
output that seems to vary between 12.2 and 12.4V. The 7812 on the good PSU
outputs a steady 12.1V. I think that is enough to cause the
Looks like the one I used is an L7812CV, which has a looser tolerance. I am
going to have to order some tighter tolerance parts.
> -Original Message-
> From: Wayne S
> Sent: Sunday, April 30, 2023 7:42 PM
> To: Wayne S
> Cc: r...@jarratt.me.uk; General Discussion: On-Topic and Off-Topic
I saw a clip of this project on DW News:
https://www.memory-of-mankind.com/
They're recording works for posterity on ceramic tiles.
How's that for preservation?
--Chuck
I'm interested in recreating MMI application note AN-114 which describes
adding an sn74s516 mult/div/acc chip to a 68000. Unfortunately, I haven't
been able to find an sn74s516 in the couple of years I've been looking.
Does anyone have some they'd be willing to part with?
KJ
On Sun, Apr 30, 2023 at 8:08 PM Ken Seefried via cctalk <
cctalk@classiccmp.org> wrote:
> I'm interested in recreating MMI application note AN-114 which describes
> adding an sn74s516 mult/div/acc chip to a 68000. Unfortunately, I haven't
> been able to find an sn74s516 in the couple of years I'v
Can anyone tell me what I picked up at a NH hamfest this weekend for $20? I see
it says RL01/RL02. I have two RL02 drives and some platters. None of which I
have gotten around to trying. Other than a copious amount of pine needles, what
can this be used for? Or maybe the right question is, shoul
On Sun, Apr 30, 2023 at 8:47 PM W2HX via cctalk wrote:
> Can anyone tell me what I picked up at a NH hamfest this weekend for $20? I
> see it says RL01/RL02. I have two RL02 drives and some platters. None of
> which I have gotten around to trying. Other than a copious amount of pine
> needles,
Can you send clear images of the entire thing in one shot, open and
closed?And the ports.
BIll
On Sun, Apr 30, 2023 at 9:47 PM W2HX via cctalk
wrote:
> Can anyone tell me what I picked up at a NH hamfest this weekend for $20?
> I see it says RL01/RL02. I have two RL02 drives and some platte
It looks like a Turbo encabulator but it's missing the flux capacitor.
Sellam
On Sun, Apr 30, 2023 at 6:47 PM W2HX via cctalk
wrote:
> Can anyone tell me what I picked up at a NH hamfest this weekend for $20?
> I see it says RL01/RL02. I have two RL02 drives and some platters. None of
> which I
Spec sheet for the 7812 shows 2 versions - 4% and 2% tolerances. So the
voltages your measuring are within the 4% part. Maybe you do need the 2% one.
Sent from my iPhone
> On Apr 30, 2023, at 11:26, Rob Jarratt via cctalk
> wrote:
>
> I think I have found a possible cause, but not too sure w
The CT version is 4%, the ACT is 2%.
Sent from my iPhone
> On Apr 30, 2023, at 11:37, Wayne S wrote:
>
> Spec sheet for the 7812 shows 2 versions - 4% and 2% tolerances. So the
> voltages your measuring are within the 4% part. Maybe you do need the 2% one.
>
> Sent from my iPhone
>
>> On A
I need to order higher tolerance ones. However, I was wondering, would a
sensible strategy be to go through the ones that I have and find one that
outputs a voltage closer to the spec? Or would that just be storing up trouble
for the future?
Regards
Rob
> -Original Message-
> From: Ro
I have at least 5 in my stock. I could easily part with one or two. I would
rather trade rather than get cash. Do you have anything to offer in trade?
-Gary
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