Re: AD561JN DAC compatibility

The one that was there originally was 8101. The defective replacement 561J is 8146. The JN is 9623.

On Nov 30, 2012, at 5:19 AM, Bill Karkula <sociableone@gmail.com> wrote:

> What is are the date codes for the two devices? I'm curious to know if they
> are young or NOS.
>
> Bill
>
> -----Original Message-----
> From: owner-vectorlist@vectorlist.org
> [mailto:owner-vectorlist@vectorlist.org] On Behalf Of Ian Eure
> Sent: Friday, November 30, 2012 12:14 AM
> To: vectorlist@vectorlist.org
> Subject: Re: VECTOR: AD561JN DAC compatibility
>
> Following up on this, I got around to swapping the bad DAC on this Asteroids
> board. Here it is running the AD561JN on the X circuit:
>
> http://i.imgur.com/4bA9x.jpg
>
> I believe this is perfectly acceptable. I also purchased an AD561J to
> compare against, but unfortunately it appears to be defective, with
> instability on the far right edge of the image: http://i.imgur.com/q8LH0.jpg
>
> The only thing I note with the JN vs. 561J is that the JN seems to output a
> somewhat smaller image, though it is correctable with the X trimmer pot, and
> could be due to differences from one production run to another.
>
> On Oct 30, 2012, at 7:37 AM, Ian Eure wrote:
>
>> Interesting. Well, I found a source for some cheap AD561JN chips, and I
> have a PCB that needs a new X DAC.
>>
>> I bought one of each, so I'm going to socket the bad location on this
> board and try both.
>>
>> On Oct 30, 2012, at 1:32 AM, Andrew Welburn <andy@andysarcade.net> wrote:
>>
>>> Yes, however i have found thet the plastic versions can be a little
> 'noisier' ie, adding spikes to vectors. This might have just been the
> particular one or two that i have seen, but i've had to replace plastic ones
> with cermaic to fix problems before.
>>>
>>> Andrew Welburn
>>> http://www.andys-arcade.com
>>>
>>> On 30/10/2012 05:47, Ian Eure wrote:
>>>> Has anyone used an AD561JN in a vector board successfully? I poked
> around the datasheet, and it looks like the only difference is that JN uses
> a plastic housing instead of the ceramic used by the JD chips. They're rated
> the same in every other regard, so I assume they will work the same, but I
> thought I'd ask to see if anyone has done it.
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Received on Sat Dec 1 10:37:09 2012