Why I did not think of the little heat sinks the OC fanatics use is  
beyond me, thanks for the pointer.  That is a quick easy solution that  
does not require navigating digikey's byzantine online catalog.  I  
just cracked the thing open again and I see two jumper leads on the  
top side of the power supply PCB adjacent to the fan mount location.   
I'm guessing that is where Mike tapped the 12V, so I'll just bag an  
appropriate diameter quiet fan off newegg while getting the heat sinks  
and call it a day.

And yeah, I'm using the cooler is better theory, there is no  
particular genius at work here.  I had a heck of a time conjuring up a  
128D that wasn't a disaster and spending three months looking for a  
working one with all its parts to come along again is not an  
experience I care to repeat, esp since they are going for $200+ now  
when they occasionally appear on eBay.  I'll probably order some extra  
heat sinks and maybe a fan to integrate into my SX-64 as well, since  
that thing has cooked off two CIA's during it's life already.

Justin

On Jul 14, 2009, at 6:56 PM, Bil Herd wrote:

> You can get heatsinks and grease from Mouser and Digikey.  Zalman  
> makes kits of stick on sinks that may work also http://www.zalman.com/ENG/product/Product_Read.asp?idx=136 
>  (available at NewEgg) I assume that your just doing a "cooler is  
> better" concept and not designing for a certain temp drop/air flow  
> combination.
>
> -----Original Message-----
> From: owner-cbm-hackers@ling.gu.se [mailto:owner-cbm-hackers@ling.gu.se 
> ] On Behalf Of Justin
> Sent: Tuesday, July 14, 2009 6:49 PM
> To: cbm-hackers@ling.gu.se
> Subject: Re: Small heat sinks for 128D
>
> I should've been more specific, this is a metal case 128D aka 128DCR.
> I believe the plastic case 128D did ship with a fan.  There is a vent
> at the back of the chassis where the integrated power supply fan would
> have been were one included, and there are vents in the front allowing
> a front to back airflow.  There are even screw holes for where the fan
> would be mounted were it included.  I do not see a pin header or holes
> in the power supply PCB for where it would attach, so I was hoping
> someone else had done some reliability modifications along these lines
> and could recommend a fan and a minimally intrusive way of powering  
> it.
>
> I'd like to add heat sinks to the chips that get hot in combination
> with the fan given the age of the hardware and my intent to have it on
> a high duty cycle.
>
> Justin
>
> On Jul 14, 2009, at 6:34 PM, Bil Herd wrote:
>
>> So it shipped without a fan?  When we designed it in '84 we
>> specifically had intake vents on the front and had specified a small
>> (mitsumi?) fan.  They didn't release the D until after I was gone so
>> I don't know what all got added/deleted.
>>
>> Bil
>>
>> -----Original Message-----
>> From: owner-cbm-hackers@ling.gu.se [mailto:owner-cbm-hackers@ling.gu.se
>> ] On Behalf Of Justin
>> Sent: Tuesday, July 14, 2009 6:28 PM
>> To: cbm-hackers@ling.gu.se
>> Subject: Small heat sinks for 128D
>>
>> Does anyone have a recommendation for small heat sinks to use when
>> hardening a 128D and a place to get them?  I want to work over the
>> internals of my 128D, and perhaps install a small low noise fan, so
>> I'd be interested in recommendations on that as well.
>>
>> TIA,
>>
>> Justin
>>
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>>
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>>
>>
>>      Message was sent through the cbm-hackers mailing list
>
>
>       Message was sent through the cbm-hackers mailing list
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>
>
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