Hello Lon,
Thank you for this information.
Are you able to provide a link to the Walmart page that has the switches you
used?
Thanks again.
Best regards,
Larry
WB6BBB
On Mon, 19 Dec 2022 10:32:37 -0600, K5jv <k5jv@kingwoodcable.com> wrote:
>Greetings to all,
>
> After a long search for a replacement for the push-button switches in
>my Alpha 78, I thought I had found them at, of all places, Walmart. You can
>not just go pick them up. You must order them online. After a three week
>wait, the switches finally arrived. They are the modern version for the
>Alpha switch, but not an exact replacement for the 50 year old switches.
>However, the internal switch contacts in the new switches are exact
>replacements for the contacts in the old switches. These new contacts appear
>to be silver ( at least in color) plated. The contacts in the
>old switches appear to be made of copper, or bronze, and, in my case, were
>badly pitted from nearly 50 years of use.
>
> The new push-rod will slide into the old switch body but will not larch
>properly. Two tiny contacts and springs are attached to the internal
>push-rod. The springs and contacts must be removed from the new push-rod and
>installed on the old push-rod. Do not cut any wires. Do not remove the small
>circuit board attached to the bottom of the switches. Just remove the
>meters. The entire switch assembly can then be unscrewed from the chassis and
>rotated up through the meter hole for relatively easy access.
>
> It is not an easy job, in fact, it was a very meticulous job for me.
>If I can do it at 81, you youngsters should have no trouble. It might take a
>little practice and I suggest you get a magnet on a stick to retrieve the tiny
>springs that will shoot all over the room. Be careful, the springs are
>magnetic, the contacts are not.
>
> The project is really worthwhile. After several hours of quite
>meticulous work, the multi-meter switches on my Alpha 78 works like new
>
>73 de Lon, K5JV
>281-795-1335
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