[Coco] The chinese crt9128 works!

[Luis Antoniosi (CoCoDemus)]

well it's an old prototype pak that i'm reproducing.




On Fri, Oct 18, 2013 at 7:47 PM, chris <cralt at comcast.net> wrote:

> Hello,
>
> I must have missed the other threads about this card.
>
> Is this a project you guys are building or is this an old card? What is
> "osh park"?
>
> I have a coco2b and sIDE. I have a multi-pak on the way and would love to
> be able to use my coco as an 80col terminal!
>
> Thanks,
> -Chris
>
> On Oct 18, 2013, at 7:18 PM, Luis Antoniosi (CoCoDemus) wrote:
>
>  there is a mistake on the previous schematics I did. But the resistors are
>> all used.
>>
>> There is one resistor under the RCA connector. In this pic you can see one
>> of its end under the RCA:
>>
>> https://pbs.twimg.com/media/**BUpSDG7CQAAvxfJ.jpg:large<https://pbs.twimg.com/media/BUpSDG7CQAAvxfJ.jpg:large>
>>
>>
>>
>> On Fri, Oct 18, 2013 at 6:21 PM, Tormod Volden <lists.tormod at gmail.com
>> >wrote:
>>
>>  On Fri, Oct 18, 2013 at 11:58 PM, Tormod Volden wrote:
>>>
>>>> On Fri, Oct 18, 2013 at 4:21 PM, Luis Antoniosi (CoCoDemus) wrote:
>>>>
>>>>> I will proceed with the prototype in wire-up and they I will make few
>>>>>
>>>> test
>>>
>>>> cards. I'll be putting the card on osh park in case you guys want to
>>>>>
>>>> make
>>>
>>>> your own.
>>>>>
>>>>
>>>> Thanks for sharing this! Just looked at your design again. You are not
>>>> hooking up the intensity signal (INTOUT, pin 8), isn't that missing an
>>>> opportunity?
>>>>
>>>
>>> On what do you base the choice of resistor values (22 and 25 Ohm) on
>>> the output stage? The Disto design uses 470 Ohm to ground and 10 Ohm
>>> in series. On your PHB board I think I can see 220 (or 330?) and 15
>>> Ohm close to the output socket although I am not sure where in the
>>> circuit they are.
>>>
>>> Tormod
>>>
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>>>
>>>
>>
>>
>> --
>> Long live the CoCo
>>
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>
>
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