Re: Dead Andrus


Allan Isaacs
 

About the time the Andrus failed I was examining the code associated with control of the Andrus to see if I could identify how to switch from Aerial A to Aerial B. I wonder if I closed a text reader and inadvertently changed the code.

This may have been a coincidence. I re-installed an earlier version of the console but it may be possible the file wasn’t corrected.. if indeed I changed it?

I have a second computer with the console installed so I might try that before I proceed.

 

After I got the Andrus I needed to swap the LAN chip which had gone short circuit. The new chip worked fine but I may have missed fully soldering all of its pins. I guess the LAN chip receives the data from the receiver but does that connection share control data? If control from the console is working correctly then that would disprove that idea.

 

Another possibility is lightning has damaged the front end (Channel A) which is an LMH6514 chip. Is it possible to change to Channel B input to check this hypothesis? Otherwise, if the LMH6514 is indeed dead would the processor still read noise and drive the console?

Allan


From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Simon Brown
Sent: 02 May 2021 14:06
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Dead Andrus

 

Hi,

 

Some command control is working, just no UDP packets received so I don’t think it’s hardware.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Allan Isaacs
Sent: 02 May 2021 10:02
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Dead Andrus

 

I don’t believe it’s a firewall problem Simon.

More tests needed but its looking like a really nasty hardware fault.

Time to dig out the circuit diagram and an oscilloscope unless there’s an Andrus diagnostic program?

I wonder if Andrus Aaslaid still listens into this forum or may another Mk1.5 user can help?

Allan G3PIY


From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Simon Brown
Sent: 29 April 2021 18:35
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Dead Andrus

 

Hi,

 

It’s just not sending data. Firewall change maybe?

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Allan Isaacs
Sent: 29 April 2021 18:15
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] Dead Andrus

 

My Andrus SDR was working quite happily in my workshop, connected via my LAN until recently when it just stopped.
Attached is the logfile from today.
The thing is powered via its USB connector and everything appears to work except there's no signal passed to SDR Console.
Any ideas?
Allan G3PIY




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