dgmin...@mediacombb.net said:
> The 1820-0313 is a Fairchild 931HC or Motorola MC931G DTL clocked flipflop.
> I think if you toy with a TTL or CMOS JK-flipflop; it should work with no
> issues. The only caveat would be the 4.2V Vcc. The DTL logic was spec'ed
> to run at 5V, same as TTL, but
I would look at using a 74HC series flip flop. Runs down to 2V.
Or perhaps the ECG or NTE 9093D (an ECG-9093D is $1.25 on Ebay). It's a dual
flip flop. You would need to check if the J and K inputs are usable in the
5065A. I think it only has one pin per J/K and the 931G has two AND'd
Poul-Henning Kamp wrote:
In message <1580810140.741428.1494966823...@mail.yahoo.com>, Ulf
Kylenfall via time-nut s writes:
That the 1820-0313 is unobtanium I can understand.Has anyone created
an equvalent based on discretesor is there a suitable SMD "single"
flip-flop like single
In message <1580810140.741428.1494966823...@mail.yahoo.com>, Ulf Kylenfall via
time-nut
s writes:
>That the 1820-0313 is unobtanium I can understand.Has anyone created
>an equvalent based on discretesor is there a suitable SMD "single"
>flip-flop like single gatesthat could be suitable?
Hi
If you approach this as “restoring a classic car”, then you repair the beast.
From a practical standpoint, looking at the
schematic and what’s in the divider setup ….. it looks like a < $2 PIC or ($3
STM32 board ) would replace almost
everything there. That’s not quite accurate, but it’s
Starting to trouble-shoot some of the 5065A circuitryI saw that the
(mechanical) clock drive flipflop IC1of the digital divider ass:y A16 is
behaving very strange.
All of the voltage regulator circuitry in this ass:y is working,providing 4.2V
and so on, but IC1 and the two transistorsQ11 and
