Re: Low Power on 40 meters


Ray Maxfield
 

Are these Test Results into a GOOD Dummy Load ???

Ray WA6VAB.  K3 #2834

 

Sent from Mail for Windows 0

 

From: Mike Flowers
Sent: Saturday, July 4, 2020 7:55 AM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Low Power on 40 meters

 

Hi Dick,

 

What does the K3 report as its input VDC during TX on these bands?

 

I had some issues and when I checked that voltage it was low, so I removed some lossy DC supply line connectors and adjusted my power supply voltage a bit.   All my issues were corrected.

 

Worth a check …

 

- 73 and good DX de Mike, K6MKF, NCDXC Secretary

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of McClain Richard
Sent: Saturday, July 04, 2020 07:50
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] Low Power on 40 meters

 

I have an old K3 which has low power on 30, 40 and 60 meters. See chart below.

Other bands are OK. The TX Gain calibration did not fix it.


The K3 PWR knob was at full clockwise with display showing 110 watts for all data shown in chart.

Measurements were done with old Heath HM-102 analog meter. Not accurate, but relative measurements.

Any suggestions to get 40 meters level up to 100 watts?

 

73,

Dick, KD4S

 

BAND

POWER

After
TX Gain Calibration POWER

160

100

100

80

95

100

60

70

75

40

75

80

30

75

90

20

110

125

17

110

60

15

120

125

12

120

125

10

100

125

 

 

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