Эксперт Электроникс - Expert Electronics - Topic: SunSDR2 DX Low Power Output (1/1)

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TOPIC: SunSDR2 DX Low Power Output

SunSDR2 DX Low Power Output 24 Nov 2023 19:41 #1

ng7e OFFLINE Posts: 14 Thank you received: 3	I'm unsure if this is happening to anyone else or only me. When i TX, it usually get about 54w of power output with an SWR of about 1.51:1. I'm running Expert SDR2 version 1.3.1 Update 11.
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SunSDR2 DX Low Power Output 25 Nov 2023 00:25 #2

LA1IO OFFLINE Posts: 13	Have you tried against a 50 ohm dummyload? 73 LA1IO
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SunSDR2 DX Low Power Output 25 Nov 2023 03:55 #3

ng7e OFFLINE Posts: 14 Thank you received: 3	Not yet.
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SunSDR2 DX Low Power Output 25 Nov 2023 12:44 #4

tomas OFFLINE Posts: 44 Thank you received: 3	Hi, do you use the tuning function from SDR or something else to drive your load? Checked driver level? Input power to the radio,, i.e. voltage and current?
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SunSDR2 DX Low Power Output 25 Nov 2023 13:37 #5

lz2aov OFFLINE LZ2AOV-M0AOV-TA4ZN Posts: 32 Thank you received: 5	As you can see NO ONE has any idea how or what you are doing to get the 56.3watts so something you could do which might help you get some real HELP is VIDEO what you are doing and stick it on YOUTUBE so then you might get some real help to get sorted, LIFE is easy when you have friends and can see what you are talking about. Hope this help's Youtube your best friend for HELP.
	Here to enjoy Ham Radio 2xSUNSDR2DX 1XSUNSDR2Pro LZ2AOV/M0AOV/TA4ZN The administrator has disabled public write access.

SunSDR2 DX Low Power Output 28 Nov 2023 23:45 #6

ng7e
OFFLINE
Posts: 14
Thank you received: 3

So.. i did get my hands on a dummy load. Below are the power outputs recorded.

6m (50.313) 71.4w 1.09:1 SWR
10m (28.425) 81.4w 1.20:1 SWR
12m (24.950) 70.3w 1.29:1 SWR
15m (21.311) 81.4w 1.26:1 SWR
17m (18.126) 86.8w 1:12:1 SWR
20m (14.313) 90.3w 1.20:1 SWR
30m (10.136) 91.5w 1.29:1 SWR
40m (7.173) 98.1w 1.24:1 SWR
60m (5.357) 93.3w 1.28:1 SWR
80m (3.905) 83.9w 1.19:1 SWR
160m (1.840) 75.1w 1.30:1 SWR

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SunSDR2 DX Low Power Output 29 Nov 2023 00:14 #7

VE3EY OFFLINE Posts: 12 Thank you received: 3	My SunSDR2DX exhibits the same behaviour. The max power I get is about 90 watts but typically it ranges between 75 and 85 on most bands. Its been like that since new - just under two years now. I am also using a nist calibrated LP-100A. Cranking the voltage up does not help as it has built in voltage limiter I read. I am using Astron RS35M power supply but I have tried others as well.
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SunSDR2 DX Low Power Output 29 Nov 2023 12:42 #8

ng7e OFFLINE Posts: 14 Thank you received: 3	Yours looks same as mine. I'll accept that this is normal for the radio and enjoy it!
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SunSDR2 DX Low Power Output