Interesting. I have one does it emulate a kw11? Can it keep the date and time 
between reboots? 

On May 2, 2025 3:44:14 PM EDT, Ethan Dicks via cctalk <[email protected]> 
wrote:
>On Fri, May 2, 2025 at 11:53 AM Jonathan Chapman via cctalk
><[email protected]> wrote:
>> > Is the KWV11-C card the best option for that or are there other options? I
>> > have looked around a bit and have seen some other RTC boards but don't 
>> > know if they
>> > would work.
>>
>> There are third-party options that are KW11 compatible and generally have 
>> more features. They're also usually nearly free when you find them! Beware 
>> of battery damage, many had a NiCd cell or pack mounted on the PCB.
>
>I have a Grant Technologies 306A/307 I found in a MicroPDP-11/53 I
>bought a few years back.  Yes... NiCd damage under the battery,
>fortunately very minor.
>
>-ethan

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