Re: RF Power #chat


Andrew Lenton
 

Thank for this: I will measure power before the filter, see if it similar to below.

 

 

73

 

Andrew

 

From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of SM7ETW Jan
Sent: 01 September 2017 23:16
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] RF Power #chat

 


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

 

 

 

 


This email has been scanned by BullGuard antivirus protection.
For more info visit www.bullguard.com

Join QRPLabs@groups.io to automatically receive all group messages.