[time-nuts] FE-5680A thermal management

Rex rexa at sonic.net
Mon Jun 15 15:41:46 EDT 2009


Nevermind.
I went back and looked again. The screws are a bit odd and sloppy 
tolerences, but a 1/16 inch allen wrench seems to work. I guess my 
memory from a couple years back was a bit off.

-Rex


Ed Palmer wrote:

> 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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>
>
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