[Milsurplus] Opening HC-6 cans ?

[Bob kb8tq]

Hi

The wire leads are attached with conductive epoxy (often H-20E). It will 
dissolve in the same ammonium bifluoride solution you use to take off
the plating. 

Bob


> On Sep 20, 2019, at 12:41 PM, David Olean <k1whs at metrocast.net> wrote:
> 
> I was under the impression that the quartz crystals in HC-6/U holders were attached by plated metal right on the blank. If this is true, you will have a harder time grinding as the metal will have to be removed first.  Then how do you re attach the small wires after grinding.  I guess I need to open an HC-6/U and find out for sure!  What was the problem with the 100 watt iron?  I suspect that the can was crimped onto the base and then sweat soldered under a vacuum, making removal a serious chore for a human with only two hands. 
> 
> In servicing comm gear with dead crystals back in the "old days", I often noted that heating the xtal can with an iron would make it start up again.  That was one way to localize the problem.  Moisture related?
> 
> Dave K1WHS
> 
> On 9/20/2019 4:21 PM, Hubert Miller wrote:
>> I found, or i should say rediscovered, a bunch of HC-6 rocks that i removed from a 1950s Collins VHF air transmitter i scrapped some years back. This set apparently used a crystal mixing scheme to generate the VHF  channels. There's abt 20 right in the 80m voice band but they all end on odd numbers like 3833.3 kHz. I would like to harvest the blanks and mebbe grind them to more popular defined channels like 3885. I recall in the past my attempts to open the soldered ones using a 100 watt iron didn't work. Maybe cutting them open? Some are not soldered anyway. What use: jeweler's blade coping saw? Dremel ? What think you ?
>> -Hue
>> 
>> 
>> 
>> Sent from my Verizon, Samsung Galaxy smartphone
>> 
>> 
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus <http://mailman.qth.net/mailman/listinfo/milsurplus>
>> Help: http://mailman.qth.net/mmfaq.htm <http://mailman.qth.net/mmfaq.htm>
>> Post: mailto:Milsurplus at mailman.qth.net <mailto:Milsurplus at mailman.qth.net>
>> 
>> This list hosted by: http://www.qsl.net <http://www.qsl.net/>
>> Please help support this email list: http://www.qsl.net/donate.html <http://www.qsl.net/donate.html>
>> Message delivered to k1whs at metrocast.net <mailto:k1whs at metrocast.net>______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to kb8tq at n1k.org

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20190920/76fe54c1/attachment.html>