new owner looking for fuses.

[Don Wilhelm]

John,

I really hate to argue with the support folks at Elecraft (it may be a
matter of preference), but if I were you, I would follow the manual
recommendations.  Try fast blow first, and if they blow, use slow-blow.

The slow-blow will ride through voltage transients on your AC line, but
the fast-blow may not - so it all depends.

73,
Don W3FPR

On 7/15/2018 6:52 PM, John Clemmer wrote:

> Hello Don.  when I talked to the guy at elecraft, I am almost positive he said slow blow fuses.  In the manual' it says 3 AG fast blow.  Really confused here.  Looked at the power cord that Mike sent with the amp.  It's a 220 power cord.  Ordered a heavy duty 15 amp power cord today.  I have a 10 amp but don't think it is heavy duty like the guy said to use.
>
>
> Does elecraft have a way of ordering replacement parts or a source where they get their parts.
>
> KB4OIF
>
> John
>
>
>> On July 14, 2018 at 2:04 PM Don Wilhelm <[hidden email]> wrote:
>>
>>
>> John yes, 12 amp 240 volts will work fine.  The voltage rating for a
>> fuse is "any voltage up to the rated voltage".
>>
>> The manual statement to use "12A fuses for 115V" does NOT mean that the
>> fuses must be rated for 115V.
>>
>> 73,
>> Don W3FPR
>>
>>
>> On 7/14/2018 1:43 PM, John Clemmer wrote:
>>> Hello.  new owner of a KPA 500 and KAT 500.  Previous owner is a good friend of mine.  He had 220 in his shack. He had 6 amp fuses in it.    I have 110 and am looking hard for fuses for the KPA 500.  Manual says two 12 amp fuses for 115V.  tech said use slow blow ones.  Any suggestions.  Can't seem to find a forum for Elelecraft.  Will 12 amp 230 v work????
> John
> KB4OIF
> Proud Vietnam Vet
> Freedom is not free, someone paid!!!
> There would be no freedom without the military........
> In GOD, we trust.
>

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[Bob McGraw - K4TAX]

I always follow the manual.  What someone said is "hear say" in court.

For both 115V and 230V operation 3AG fast blow fuses are specified.  For
115V those would be 12 amp fuses.  For 230V those would be 6 amp fuses. 
And they should be rated at 250 volts.

Just be sure the Mains Voltage Settings on page 5 of the manual are
followed.  The KPA-500 comes from the factory with the transformer tap
set for 116V to 125V and 231V to 250V depending on selection on the fuse
block / power inlet at the rear.   There are other voltage ranges as
defined on page 8 of the manual.

73

Bob, K4TAX




On 7/15/2018 6:07 PM, Don Wilhelm wrote:

> John,
>
> I really hate to argue with the support folks at Elecraft (it may be a
> matter of preference), but if I were you, I would follow the manual
> recommendations.  Try fast blow first, and if they blow, use slow-blow.
>
> The slow-blow will ride through voltage transients on your AC line,
> but the fast-blow may not - so it all depends.
>
> 73,
> Don W3FPR
>
> On 7/15/2018 6:52 PM, John Clemmer wrote:
>> Hello Don.  when I talked to the guy at elecraft, I am almost
>> positive he said slow blow fuses.  In the manual' it says 3 AG fast
>> blow.  Really confused here.  Looked at the power cord that Mike sent
>> with the amp.  It's a 220 power cord.  Ordered a heavy duty 15 amp
>> power cord today.  I have a 10 amp but don't think it is heavy duty
>> like the guy said to use.
>>
>>
>> Does elecraft have a way of ordering replacement parts or a source
>> where they get their parts.
>>
>> KB4OIF
>>
>> John
>>
>>
>>> On July 14, 2018 at 2:04 PM Don Wilhelm <[hidden email]> wrote:
>>>
>>>
>>> John yes, 12 amp 240 volts will work fine.  The voltage rating for a
>>> fuse is "any voltage up to the rated voltage".
>>>
>>> The manual statement to use "12A fuses for 115V" does NOT mean that the
>>> fuses must be rated for 115V.
>>>
>>> 73,
>>> Don W3FPR
>>>
>>>
>>> On 7/14/2018 1:43 PM, John Clemmer wrote:
>>>> Hello.  new owner of a KPA 500 and KAT 500.  Previous owner is a
>>>> good friend of mine.  He had 220 in his shack. He had 6 amp fuses
>>>> in it.    I have 110 and am looking hard for fuses for the KPA
>>>> 500.  Manual says two 12 amp fuses for 115V.  tech said use slow
>>>> blow ones.  Any suggestions.  Can't seem to find a forum for
>>>> Elelecraft. Will 12 amp 230 v work????
>> John
>> KB4OIF
>> Proud Vietnam Vet
>> Freedom is not free, someone paid!!!
>> There would be no freedom without the military........
>> In GOD, we trust.
>>
>
> ______________________________________________________________
> Elecraft mailing list
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>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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