[Pafgbt] Soldering new dipoles

[Karl Warnick]

Bob,

We have 20 kits, with one soldered already, so 19 remaining. Due to a 
design change, we have quite a few thin rods with the copper/gold 
plating. Should we went a few of the thin rods to you, or an entire kit 
perhaps?

Karl

On 1/22/2013 12:43 PM, Bob Simon wrote:
> Hi Karl,
>      Did you make any fixtures to hold the pieces in place during 
> soldering? If not, could you send drawings, so I could think about how 
> to support them?
>      I've had better luck soldering these type things on a hot plate, 
> rather than a torch.  In my experience, heating it up and doing all 
> the soldering in one session is better than doing each joint 
> separately.  I agree, a few test pieces would help.
> Thanks,
> bob..
>
>
> On 1/22/2013 2:30 PM, Dennis Egan wrote:
>> That's what I assumed but I saw some blackening on the picture and 
>> just wanted to check.
>>
>> We would like to do these, we are currently hung up on another job 
>> availability will improve in the next couple of weeks.  Are there any 
>> extra pieces that we could practice on?
>>
>> Dennis
>>
>> Bob Simon wrote:
>>>     The ones we've done here in GB were soldered with SN62. There 
>>> isn't much mechanical stress on these, so the softer solder works 
>>> fine.  Also, the lower melting point allows you to get on and off 
>>> the heat quickly, avoiding damage/discoloration to the gold-plated 
>>> brass.
>>> bob..
>>>
>>>
>>>
>>> On 1/22/2013 12:38 PM, Dennis Egan wrote:
>>>> Are these intended to be soldered with eutectic solder or silver 
>>>> solder?
>>>>
>>>> Karl Warnick wrote:
>>>>> Bob and all,
>>>>>
>>>>> Rick suggested last fall that the Green Bank machine shop could 
>>>>> assist with fabrication of the new dipoles. We've run into a snag 
>>>>> and could use some help. The soldering expert in our university 
>>>>> machine shop has retired, and the current staff have not been able 
>>>>> to achieve the quality in the soldering we need for the antennas 
>>>>> (see attached). Would it be possible for us to send the parts for 
>>>>> the remaining 19 dipoles to Green Bank for soldering?
>>>>>
>>>>> Karl
>>>>>
>>>>>
>>>>>
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>
>
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-- 
Karl F. Warnick
Department of Electrical and Computer Engineering
Brigham Young University
459 Clyde Building
Provo, UT 84602
(801) 422-1732





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