[Elecraft] KPA500 Power In Digital Modes

[Eric Norris]

As others have said, check your jumpers, and especially any barrel or elbow connectors you bought at a hamfest.  They are junk.  I learned the hard way that paying through the nose for good connectors, like Amphenol, is cheaper than buying a new 3CX800 tube, and saves hours of frustration.   Save them for QRP--that's all they are good for.

73

Eric WD6DBM

Michael Eberle <mteberle at mchsi.com> wrote:

>Yes, I suppose something may just need a slight adjustment.  It just 
>frustrates me when things don't work like I expect them to.  I was 
>always afraid to run JT65 at more than 80-100 watts until I saw this 
>post.  Started trying higher power while keeping a close eye on the 
>temp.  No faults on any band but 6M if it gets much over 200 watts (8 
>watts drive).  It seems to be running 450 watts easily on 160M.
>
>On 11/11/2014 5:44 AM, Eric Norris wrote:
>> Don't do it!  If you can't get an answer here, contact Elecraft support.  Your KPA500 will work great on 6m once you get this issue resolved.  Mine runs at 600w on 6m meteor scatter using FSK441 30 seconds on, 30 seconds off, for hours on end, hitting 65C but soldiering on without complaint.  That would leave my former dual 3-500Z amp squeaking from the freaking.
>>
>> 73
>>
>> Eric WD6DBM
>>
>> Michael Eberle <mteberle at mchsi.com> wrote:
>>
>>> On 11/10/2014 5:56 PM, mcduffie at ag0n.net wrote:
>>>> On Mon, 10 Nov 2014 09:34:09 -0800, Jim Brown wrote:
>>>>
>>>>> During KPA500 beta, I was loaned one for a major RTTY contest weekend
>>>>> and told to run it "with all the lights lit." I did, and it worked fine.
>>>>> In the 3-4 years I've owned one, I regularly run it at full power in
>>>>> digital modes on all bands, 160-6M. When it gets warm, the fan speeds
>>>>> up, but it continues to put out full power. This includes digital modes
>>>>> like FSK441 and JT65A on 6M, and lots of RTTY on the HF bands.
>>>
>