[hpsdr] Mounting Munin T1 & T2??

[Robert Lorenzini]

I don't think I'm following you. The leads on the drivers should stick 
up above the board before they are trimmed.
I trashed the mounting spacers. Mounted all the transistors to the heat 
sink, shimmed up the board until every
thing was level and then made new spacers (tubes) and used a screw 
through the board to the heat sink. You
want to avoid any strain on the board.

Bob


On 12/24/2013 01:09 PM, John wrote:
>
> Hi Bob,
>
> I don't think that document applies in my case.  With the transistors 
> I got with my kit, and with the four board mounting spacers made so 
> that the tops of the transistor flanges are flush with the top of the 
> circuit board, the other transistors leads are way above the level of 
> the top of the board.
>
> John,  WoGN
>
>
> At 01:35 PM 12/24/2013, Robert Lorenzini wrote:
>> On 12/24/2013 11:25 AM, John wrote:
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>>
>>>
>>> Transistors T1 and T2 in my Munin kit are made with the two thin 
>>> leads a considerable distance above the top of the mounting flange.  
>>> When the four corners of the circuit board are spaced so that the 
>>> two thin transistor leads are flat against the pads on top of the 
>>> board, there is considerable distance between the bottom of the 
>>> copper straps and the top of the transistor flange. As transistor 
>>> hardware is tightened the board starts to bend and the transistor 
>>> leads lift above the pads on the circuit board.
>>>
>>> Has anyone else had this problem and, if so, how did you make it work?
>>
>> Your going to need to make custom spacers.
>>
>> http://k9ivb.net/munin2/Mounting_The_RD100HHF1.pdf
>>
>> Bob - wd6dod
>
>
>


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