[Elecraft] KPA500 external mains switch

[Bob McGraw K4TAX]

Bill:

That is my general objective.   Having surge protector strips all over 
the house has not proven worthwhile.  On the other hand, the 
installation of whole house surge protection has proven to be much more 
successful.  This also takes care of switching transits cause by load 
balancing by the power company.

As to protection for lightning, that's a totally different approach and 
methodology.  Lightning rods installed on the house, all ground rods 
bonded together, copper plumbing to ground system, all services {phone, 
cable, TV antenna, satellite dish and etc} connected to the bonded 
ground system.

Still if there is a direct strike, as we have received, get ready to 
repair and replace some stuff.  Hopefully, the house is still standing.

73

Bob, K4TAX


On 1/18/2019 3:43 PM, Bill Johnson wrote:
> Bob, totally agree and this is exactly what I have.  Main breaker box, whole house protection.  Lightning is, of course, a whole different conversation when it comes to direct hits. Line spikes can wear out motors, take out weak power supplies, etc., which the suppressor will protect.
>
> 73,
> Bill
> K9YEQ
>
> https://wrj-tech.com/
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of Bob McGraw K4TAX
> Sent: Friday, January 18, 2019 10:30 AM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] KPA500 external mains switch
>
> I have a whole house surge protector installed at the Mains breaker panel.  Thus I find no need to have individual surge protection for any of the equipment locations in the QTH.   This takes care of microwave, range, furnace, washer, radios, TV's, entertainment systems, phone system and such.
>
> Not sure I like or agree with the idea of a separate mains switch.  If for remote purposes, remember when turning off the amp via the front power switch, one must allow the voltage to bleed down before shutting off the main power switch on the rear.  {Per the manual}  This would seem to be true with an external switch.
>
> I've assisted many hams with issue resolution only to find out they have and use a "big switch" or otherwise to shut down the station.  This IS NOT a good idea as many/most microprocessor circuits have provision to save data before shutting down equipment.  Thus if one uses a "big switch" it kills the DC source thus the processor does not have the opportunity to save the data status.   As to what's left......., sometimes scrambled data, and that's where the issues arise.
>
> 73
>
> Bob, K4TAX
>
>
> On 1/18/2019 10:11 AM, Macy monkeys wrote:
>> Is anyone in the US using a separate 220v external mains switch on their KPA500? I'm wondering where these are available. Or is anyone using a 220 v surge protector? Are these available for the NEMA 6-15 plug?
>>
>> John K7FD
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