[Heathkit] DX-60B Function Switch damage.

[Kenneth G. Gordon]

On 22 May 2021 at 14:42, Mark K3MSB wrote:

> 
> Hi Ken
> 
> Thanks for posting that.   I had not considered that failure mechanism -- I was fixated on inrush 
> current.
> 
> I had to install a snubber across the HV relay contacts in my BC-456 modulator a few years ago.   
> Years of use had caused significant damage to the relay contacts,  and it got to the point where 
> the relay contacts would arc and not disengage.     I put in the snubber, as recommended by Dave 
> AB5S, when I installed the new relay.
> 
> So, perhaps a snubber and inrush limiting resistor may be a good fix.

I would agree.

> 
> >>This past month, Electric Radio Magazine published a nomograph....
> 
> I immediately picked up the May issue off the table as I couldn't remember seeing such a graph,  
> and couldn't find it.   Looked twice.   With my reading specs on....
> 
> I then ran out to the mailbox in hopes the June issue was here......    No luck.
> 
> What issue Ken ?

April, Mark. Issue number 382, page 22, as an Editor's Note to the article entitled, "Putting 
the "ON" Back in Your AC Switch".

Ken W7EKB