System Red Amplifier probs
#1
I've been having problems with my red amplifier recently. Symptoms are working fine then all of a sudden lights on controller dim and power drops on powered usb hub. Same symptoms when powered from PC usb port and similar behavior when powered off a battery.

When unplugging the amplifier it comes back to life. I can see similar behavior if I unplug from controller and power via mini usb port so reasonably sure its the amp. I have used a different power cable and LAN cable as part of troubleshooting

I've checked all solder joints and they are all good. There was no water ingress in the box it was mounted in. I thought it might be have been the electrolytic capacitors so replaced all 4 of them but still not solved.

I've noticed on the webpage it comes up with:
No or unknown amplifier connected

In the amplifier section it shows

PCB 12.3 FW 1.7

and I can see it disappear , reappear then drop the gain in steps as adc voltage too high, settled and then disappear.

At a loss what to try next.


log looks like this...

Code:
Blitzortung.org Controller
Station 1243
FW 8.2PCB 10.4/12.3
2017-04-17 06:57:14   9138 | AUTO 1/1: [NOISE IS LOWER] -32/30mV. Trying to raise gain...
2017-04-17 06:57:14   9138 | AMP1: Set gain 6 on channel 0, op-amp 0
2017-04-17 06:57:14   9138 | AMP1: Set gain 6 on channel 0, op-amp 1
2017-04-17 06:57:14   9138 | AUTO 1/2: [NOISE IS LOWER] -20/19mV. Trying to raise gain...
2017-04-17 06:57:14   9138 | AMP1: Set gain 6 on channel 1, op-amp 0
2017-04-17 06:57:14   9138 | AMP1: Set gain 6 on channel 1, op-amp 1
2017-04-17 06:57:14   9138 | AMP1: Ch1, Gain1:     3   ->  6
2017-04-17 06:57:14   9138 | AMP1: Ch1, Gain2:     0   ->  6
2017-04-17 06:57:14   9138 | AMP1: Ch2, Gain1:     3   ->  6
2017-04-17 06:57:14   9138 | AMP1: Ch2, Gain2:     0   ->  6
2017-04-17 06:57:14   9138 | AMP1: Set gain 5 on channel 0, op-amp 0
2017-04-17 06:57:14   9138 | AMP1: Set gain 5 on channel 0, op-amp 1
2017-04-17 06:57:14   9138 | AMP1: Set gain 5 on channel 1, op-amp 1
2017-04-17 06:57:14   9138 | AMP1: Ch1, Gain1:     6   ->  5
2017-04-17 06:57:14   9138 | AMP1: Ch1, Gain2:     6   ->  5
2017-04-17 06:57:14   9138 | AMP1: Ch2, Gain2:     6   ->  5
2017-04-17 06:57:19   9143 | AMP1: Command 'Board 1, Firmware 1.7'
2017-04-17 06:57:19   9143 | AMP1: Controller-board 'Nice to meet you. :-)'
2017-04-17 06:57:20   9144 | AMP1: Setting all gains...
2017-04-17 06:57:21   9145 | EVENT: Amplifier 1 is now connected
2017-04-17 06:57:21   9145 | === New Amplifier 1 Connected ===
2017-04-17 06:57:21   9145 | AMP1: PCB:           -1   ->  1
2017-04-17 06:57:21   9145 | AMP1: Firmware:       0.0 ->  1.7
2017-04-17 06:57:21   9145 | AMP1: Refresh-Intvl:  0   ->  0
2017-04-17 06:57:21   9145 | AMP1: Localmode:      0   ->  1
2017-04-17 06:57:21   9145 | AMP1: Channels:       0   ->  2
2017-04-17 06:57:21   9145 | AMP1: Ch1 op-amps:    0   ->  2
2017-04-17 06:57:21   9145 | AMP1: Ch1, Gain1:     5   ->  0
2017-04-17 06:57:21   9145 | AMP1: Ch1, Gain2:     0   ->  0
2017-04-17 06:57:21   9145 | AMP1: Ch2 op-amps:    0   ->  2
2017-04-17 06:57:21   9145 | AMP1: Ch2, Gain1:     5   ->  0
2017-04-17 06:57:21   9145 | AMP1: Ch2, Gain2:     0   ->  0
2017-04-17 06:57:22   9146 | AMP1: Setting all gains...
2017-04-17 06:57:22   9146 | AMP1: Set gain 5 on channel 0, op-amp 0
2017-04-17 06:57:22   9146 | AMP1: Set gain 0 on channel 0, op-amp 1
2017-04-17 06:57:22   9146 | AMP1: Set gain 5 on channel 1, op-amp 0
2017-04-17 06:57:22   9146 | AMP1: Set gain 0 on channel 1, op-amp 1
2017-04-17 06:57:22   9146 | AMP1: Localmode:      1   ->  0
2017-04-17 06:57:22   9146 | AMP1: Ch1, Gain1:     0   ->  5
2017-04-17 06:57:22   9146 | AMP1: Ch2, Gain1:     0   ->  5
2017-04-17 06:57:23   9147 | REMOTE-CONFIG: Message with status 32, seconds 120, text 'Error: Invalid amplifier PCB detected! '
2017-04-17 06:57:23   9147 | REMOTE-CONFIG: Message with status 32, seconds 120, text 'Error: Invalid amplifier PCB detected! '
2017-04-17 06:57:23   9147 | REMOTE-CONFIG: Message with status 32, seconds 120, text 'Error: Invalid amplifier PCB detected! '
2017-04-17 06:57:23   9147 | REMOTE-CONFIG: Message with status 32, seconds 120, text 'No or unknown amplifier connected! '
2017-04-17 06:57:23   9147 | REMOTE-CONFIG: Server '0' deactivated
2017-04-17 06:57:23   9147 | REMOTE-CONFIG: Server '0', expert '0'
2017-04-17 06:57:23   9147 | REMOTE-CONFIG: Set max relative gain: rgain_max=10240, threshold_min=100 on amp0, ch0
2017-04-17 06:57:23   9147 | REMOTE-CONFIG: Set max relative gain: rgain_max=10240, threshold_min=100 on amp0, ch1
2017-04-17 06:57:23   9147 | REMOTE-CONFIG: Set max relative gain: rgain_max=0, threshold_min=100 on amp0, ch2
2017-04-17 06:57:23   9147 | REMOTE-CONFIG: Done with 10 updates and 0 errors
2017-04-17 06:57:24   9148 | AUTO 1/1: [NOISE MUCH TOO HIGH] 12692/12762mV. ADC accuracy could be affected! Trying to lower gain...
2017-04-17 06:57:24   9148 | AMP1: Set gain 3 on channel 0, op-amp 0
2017-04-17 06:57:24   9148 | AUTO 1/2: [NOISE MUCH TOO HIGH] 12706/12743mV. ADC accuracy could be affected! Trying to lower gain...
2017-04-17 06:57:24   9148 | AMP1: Set gain 3 on channel 1, op-amp 0
2017-04-17 06:57:24   9148 | AMP1: Ch1, Gain1:     5   ->  3
2017-04-17 06:57:24   9148 | AMP1: Ch2, Gain1:     5   ->  3
2017-04-17 06:57:30   9154 | REMOTE-CONFIG: Server '0' activated
2017-04-17 06:57:30   9154 | REMOTE-CONFIG: Server '0', expert '1'
2017-04-17 06:57:30   9154 | REMOTE-CONFIG: Done with 3 updates and 0 errors
2017-04-17 06:57:34   9158 | AUTO 1/1: [NOISE IS LOWER] -32/31mV. Trying to raise gain...
2017-04-17 06:57:34   9158 | AMP1: Set gain 6 on channel 0, op-amp 0
2017-04-17 06:57:34   9158 | AMP1: Set gain 6 on channel 0, op-amp 1
2017-04-17 06:57:34   9158 | AUTO 1/2: [NOISE IS LOWER] -19/20mV. Trying to raise gain...
2017-04-17 06:57:34   9158 | AMP1: Set gain 6 on channel 1, op-amp 0
2017-04-17 06:57:34   9158 | AMP1: Set gain 6 on channel 1, op-amp 1
2017-04-17 06:57:34   9158 | AMP1: Ch1, Gain1:     3   ->  6
2017-04-17 06:57:34   9158 | AMP1: Ch1, Gain2:     0   ->  6
2017-04-17 06:57:34   9158 | AMP1: Ch2, Gain1:     3   ->  6
2017-04-17 06:57:34   9158 | AMP1: Ch2, Gain2:     0   ->  6
2017-04-17 06:57:34   9158 | AMP1: Set gain 5 on channel 0, op-amp 0
2017-04-17 06:57:34   9158 | AMP1: Set gain 5 on channel 0, op-amp 1
2017-04-17 06:57:34   9158 | AMP1: Set gain 5 on channel 1, op-amp 1
2017-04-17 06:57:34   9158 | AMP1: Ch1, Gain1:     6   ->  5
2017-04-17 06:57:34   9158 | AMP1: Ch1, Gain2:     6   ->  5
2017-04-17 06:57:34   9158 | AMP1: Ch2, Gain2:     6   ->  5
2017-04-17 06:57:37   9161 | AMP1: Command 'Board 1, Firmware 1.7'
2017-04-17 06:57:37   9161 | AMP1: Controller-board 'Nice to meet you. :-)'
2017-04-17 06:57:38   9162 | AMP1: Setting all gains...
2017-04-17 06:57:38   9162 | EVENT: Amplifier 1 is now connected
2017-04-17 06:57:38   9162 | === New Amplifier 1 Connected ===
2017-04-17 06:57:38   9162 | AMP1: PCB:           -1   ->  1
2017-04-17 06:57:38   9162 | AMP1: Firmware:       0.0 ->  1.7
2017-04-17 06:57:38   9162 | AMP1: Refresh-Intvl:  0   ->  0
2017-04-17 06:57:38   9162 | AMP1: Localmode:      0   ->  1
2017-04-17 06:57:38   9162 | AMP1: Channels:       0   ->  2
2017-04-17 06:57:38   9162 | AMP1: Ch1 op-amps:    0   ->  2
2017-04-17 06:57:38   9162 | AMP1: Ch1, Gain1:     5   ->  0
2017-04-17 06:57:38   9162 | AMP1: Ch1, Gain2:     0   ->  0
2017-04-17 06:57:38   9162 | AMP1: Ch2 op-amps:    0   ->  2
2017-04-17 06:57:38   9162 | AMP1: Ch2, Gain1:     5   ->  0
2017-04-17 06:57:38   9162 | AMP1: Ch2, Gain2:     0   ->  0
2017-04-17 06:57:39   9163 | AMP1: Setting all gains...
Stations: 1243, 1887
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Messages In This Thread
System Red Amplifier probs - by ShimmerNZ - 2017-04-17, 06:53
RE: System Red Amplifier probs - by BobW - 2017-04-18, 02:06
RE: System Red Amplifier probs - by ShimmerNZ - 2017-04-18, 10:16
RE: System Red Amplifier probs - by BobW - 2017-04-19, 01:26
RE: System Red Amplifier probs - by ShimmerNZ - 2017-04-23, 06:58
RE: System Red Amplifier probs - by BobW - 2017-04-26, 03:11
RE: System Red Amplifier probs - by Dale.Reid - 2017-04-24, 01:32
RE: System Red Amplifier probs - by ShimmerNZ - 2017-06-04, 03:56
RE: System Red Amplifier probs - by ShimmerNZ - 2017-06-20, 08:56



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