K3 Hardly any Output

[Thomas J. Hoedjes]

Hello

Turned my K3 on this afternoon only to find out it has only about 10 Watts output on full 120 scale..

reset, restored, nothing changed..

Did the whole alignment to find out that on all bands with the 5 watt tx alignment i can get any higher as 2.7 till 2.8  is goes up a very short time and comes back to 2.7
Tx Alignmnet with the Utility gave err txg error..

K3 was functioning 100% couple of weeks ago....

Also with the 3.11 fw

Any help??

PS this is the second K3 i have in hand with the same problem

Both i could not solve sofar...




73
 Tom                            mailto:[hidden email]


 

--
73's
 Tom                          mailto:[hidden email]

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[Dick Dievendorff]

Tom, please verify that CONFIG:KPA3 is "PA NOR".

Dick, K6KR


-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Tom (HB9DOD)
Sent: Thursday, May 14, 2009 7:59 AM
To: [hidden email]
Subject: [Elecraft] K3 Hardly any Output

Hello

Turned my K3 on this afternoon only to find out it has only about 10 Watts
output on full 120 scale..

reset, restored, nothing changed..

Did the whole alignment to find out that on all bands with the 5 watt tx
alignment i can get any higher as 2.7 till 2.8  is goes up a very short time
and comes back to 2.7
Tx Alignmnet with the Utility gave err txg error..

K3 was functioning 100% couple of weeks ago....

Also with the 3.11 fw

Any help??

PS this is the second K3 i have in hand with the same problem

Both i could not solve sofar...




73
 Tom                            mailto:[hidden email]


 

--
73's
 Tom                          mailto:[hidden email]

______________________________________________________________
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Please help support this email list: http://www.qsl.net/donate.html

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[Thomas J. Hoedjes]

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[Doug Turnbull]

I suppose we all like to improve what we have.  This is a road to progrsss   The folks at Elecraft have proven themselves to be first class engineers.   They must have done a worst case design and thermal analysis.   I would put some faith in them.   We can of course install a squirrel cage blower atop the K3 and most of the radio will stay close to ambient temperature but then the noise will rival the QRN on the bands.  Many electronic components are made to run at high temperatures.   A maximum junction temperature of 175C is not out of line.   Of course a heat sink gets hot but if the design is conservative enough then all is okay.   Start opening the sides of the case and RFI screenig will be reduced.   You are also likely to reduce the resale value of your radio.   Not that one would sell a K3.   This is just another take and questioning is part of what we should all do.

                 73 Doug EI2CN

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