[Premium-Rx] Source For Mackay Parts??

[Bob Milne]

Hi John,

Thanks for the excellent tips. I wish my hands were as steady and my
eyes as good as they were 20 years ago.

Regards....
....Bob

On Mon, 04 Aug 2003 02:16:11 -0400, you wrote:

>Bob Milne wrote:
>
>> HI All,
>>
>> While it was powered off, but still connected to the AC line, my
>> prized MSR5050A decided to start a fire on its power-supply board. In
>> fact, it burned a 1/4-in hole all the way through the pc board.
>
>Sorry to hear it. I've had similar problems with other gear. It is possible to
>repair PCB's with holes. It takes patience and some time.
>
>If the hole is fairly small, clean the edges carefully down to new glass epoxy,
>put a piece of tape on one side (slightly dimpled in)  and fill the hole with
>high quality, 2 part epoxy (such s Hysol Epoxy-Patch). Do NOT use 5 minute stuff
>or 1 part. It may take two or three iterations to get something that is level.
>Don't overfill. A Dremel tool helps.  If the hole is big, cut a piece of scrap
>board and epoxy it in the hole as above.
>
>When it is all well hardened, you can drill holes as necessary and use adhesive
>backed copper foil to repair the traces. I removed the adhesive with acetone and
>epoxied the copper down to the board. Also, through plated holes can be repaired
>with eyelets.
>
>The repair will not be perfect, but will last a very long time if done
>carefully. I have some DG computer boards that I repaired 20+ years ago, and
>they are still fine. Not pretty, but well worth it at $6000/ board.
>
>-John