[time-nuts] FE-5680A thermal management

Ed Palmer ed_palmer at sasktel.net
Mon Jun 15 11:28:35 EDT 2009


No.  I have one and it's very appropriate for a piece of Time-Nut 
equipment.  They're Allen screws.  :-)

Ed

J. L. Trantham wrote:
> They look like Torx Screws.  Not so?
>
> Thanks,
>
> Joe
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Rex
> Sent: Monday, June 15, 2009 2:33 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] FE-5680A thermal management
>
>
> Hal Murray wrote:
>
>   
>> Leigh at WA5ZNU.org said:
>>  
>>
>>     
>>> For reference, Ridge Equipment has a photo of one of this year's crop 
>>> of  FE-5680A mounted to a large aluminum plate. 
>>> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=330233071735
>>> http://i43.tinypic.com/126cpcp.jpg
>>>    
>>>
>>>       
>> Is that an aluminum plate or the top side of a PCB used as a heat sink?
>>
>> To me, the first picture looks green/FR4 around the edges. (and a 
>> stripe on
>> the left)
>>
>>  
>>
>>     
> Yes, that is a portion of the board I described in an earlier message. 
> The board is thick fiberglass plated heavily on both the top and bottom. 
> The board in the picture has been cut both above and below the 5680A. 
> The plating ended about where the lower cut is, but the plating 
> continued farther above the top of the unit in the picture. My earlier 
> message gave the dimensions.
>
> One minor note about this board. The screws holding the 5680 to the 
> borad were an unusual type. I can't remember, I think they may have been 
> a square drive. They were difficult to remove as I had no proper tool to 
> unscrew them. I think I made something from steel rod to start them 
> losening.
>
>
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