[Test-Equipment] HP 8640B Broken AM Modulation Switch

[Mark Donaldson via Test-Equipment]

I've done it before. It took quite some time to locate a donor switch, finally got one from a hangar queen 8640 that a friend of mine had, they are not easy to come by because they are often broken and are in big demand. Locating one is half the battle, installing it is a miserable job. I would not want to have to do it again.
Mark WA1QHQ 

     On Wednesday, November 19, 2014 11:56 AM, Pete Lancashire <pete at petelancashire.com> wrote:
   

 Does the switch it self still work ? If so I've in the past fabricated
and then epoxied a new piece. Did it for one of the HP pulse
generators that used the same design switch. Maybe ask on the Yahoo
Agilent/HP group. -pete

On Wed, Nov 19, 2014 at 8:18 AM, Barry <n4buq at knology.net> wrote:
> Anyone have any suggestions on how to fix a broken AM modulation switch on an HP 8640B?  I'm looking at one that has that problem on eBay and was wondering how hard it is to find a replacement part.  I know these are fragile points and many have been broken over the years.  I'm also figuring there are few if any NOS replacement parts so not sure if I want to take a chance on this or not so was was wondering what others have done for this.  Time for a 3D printer?
>
> Thanks,
> Barry - N4BUQ
>
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
Test-Equipment mailing list
Home: http://mailman.qth.net/mailman/listinfo/test-equipment
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Test-Equipment at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html