Re: RF Power #chat


Andrew Lenton
 

30M has high loss too:

 

Looks like the lower frequency LPF have a bit more loss!

 

 

From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of Andrew Lenton
Sent: 02 September 2017 16:26
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] RF Power #chat

 

15 M LPF response:

 

Looking ok.

 

 

73 Andrew

 

 

-----Original Message-----
From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of g4sra via Groups.Io
Sent: 02 September 2017 13:44
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] RF Power #chat

 

They look like dBW figures ?

 

On 01/09/17 23:16, SM7ETW Jan wrote:

> The following is my U3S *without any LPF* , bias adjusted to keep overtones down.

> The overtone values are dB down from main carrier.

>

> U3S  all values in dBm

> Frequency kHz Power out dBm 2nd overtone 3rd overtone 4th overtone 5th  

> overtone

> 137 22.6 -29.1 -8.9 -36.7 -14

> 475 23.6 -27.6 -9.4 -33.1 -14.1

> 1900 23.8 -35.5 -9.66 -39.8 -18.2

> 3600 23.9 -36.8 -9.9 -37.5 -14.6

> 5300 23.6 -36.5 -9.6 -35.1 -14.6

> 7100 23.9 -34.3 -10.1 -32.2 -15.1

> 10130 23.8 -30.8 -10.2 -26.8 -15.6

> 14100 23.5 -25.9 -10.4 -22.5 -22.3

> 18100 23.4 -22.9 -10.7 -19.2 -25

> 21100 23.2 -20.6 -11.2 -19 -26.9

> 25000 23.2 -17.6 -13.0 -19.7 -39.2

> 28500 23.1 -15.5 -15.3 -21.6 -39.1

> 50100 21.3 -17.3 -36.3 -28.3 -21.3

> 70100 18.8 -17.8 -23.8 -24.8 -18.8

> 145000 10.8 -13.3 -25.8 -10.8 -10.8

> 200000 9.1 -9.1 -9.1 -9.1 -9.1

> 220000 6.2

> 230000 8

>

 

 

 

 

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