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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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Old 3rd Nov 2019, 2:20 pm   #1
Martin G7MRV
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Default AWM1361 IC data?

Has anyone come across this IC before? Device AWM1361. It is used as the swept tone and switching controller in the BE375 SARBE-5, and is the only component in the entire radio that I dont recognise.

It is a 12 pin device, in what looks from the service manual to be a TO-5 can. I've so far not found any data on-line.

I suspect it is a custom/house marked part, but it might just be obscure!

Any help with data on this would be much appreciated,



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Old 7th Nov 2019, 1:32 pm   #2
Martin G7MRV
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Default Re: AWM1361 IC data?

Looks like no one knows this beasties!

Can anyone give me a lead on the prefix? Perhaps if I can identify the manufacturer...

Unless of course 'AWM' stands for something like 'automatic warning module'...
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Old 7th Nov 2019, 1:45 pm   #3
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Default Re: AWM1361 IC data?

I also had a look on the internet, absolutely nothing reference this IC.
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Old 7th Nov 2019, 7:30 pm   #4
Maarten
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Default Re: AWM1361 IC data?

Do you have a picture of it? Even small clues such as the layout and font of the stamp could help.
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Old 7th Nov 2019, 7:41 pm   #5
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Default Re: AWM1361 IC data?

Is it definitely an IC, not something weird like a SAW filter?
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Old 7th Nov 2019, 7:51 pm   #6
Martin G7MRV
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Default Re: AWM1361 IC data?

I don't have an image yet, as I don't yet have the unit to photograph. It is an IC, and generates the downward swept distress audio tone, and the control switching of the beacon transmitter.

That's pretty much all I know about it.
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Old 7th Nov 2019, 7:59 pm   #7
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Default Re: AWM1361 IC data?

Does anyone have a Tower's IC selector? There used to be some fairly obscure equivalents listed in that.
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Old 8th Nov 2019, 1:16 am   #8
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Default Re: AWM1361 IC data?

I suspect, being military equipment, that is a special ic/house numbered chip.

Plenty of pics of the unit on the net but couldn't find one of the internals.
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Old 12th Nov 2019, 7:11 am   #9
Martin G7MRV
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Default Re: AWM1361 IC data?

I have the service manual for it - every other part is marked in normal consumer codes. This is the one and only 'special' part in the whole radio (discounting the phenomenally small and cute tapped toroids in the RF sections!), so I suspect it was specially manufactured in order to produce the dual downwards swept tone bursts and the beacon Tx switching.

I have a SARBE-6 (BE515) working and modified to disable any Tx, but dont have the schematics for it (worked the switching scheme out based on the SARBE-5 and lots of testing with a multimeter!), not sure if it uses the same IC. I have the SARBE-5 on its way to me from Italy.

Since the mods to disable Tx effectively make this IC redundant, and its on its own little plug in board (I think, might be some other circuits on there), I might remove it to play with. Possibly freeing up some space for an RF pre-amp to improve the receiver.
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Old 14th Nov 2019, 3:05 pm   #10
Martin G7MRV
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Default Re: AWM1361 IC data?

I now have the SARBE-5 in my possession. I'm in the process of a few minor repairs to it, as the antenna socket was loose and the antenna connections broken. It seems from the self-test that the Tx side is unserviceable, but receive is working (I'll be disabling the Tx circuits anyway! I've already pulled the crystals!)

This means that Iv'e been able to locate, remove, and photograph the switching board holding this IC, photo attached.

It is marked differently than in the schematic! It looks like 69886 or 98869.

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Old 14th Nov 2019, 3:10 pm   #11
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Default Re: AWM1361 IC data?

It's remarkably unlucky that all the digits in the part number are invertable, but I would assume it should be read the same way up as the 'AWA' logo, so '69886'.
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Old 14th Nov 2019, 3:14 pm   #12
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Default Re: AWM1361 IC data?

This would appear to be the company which made it - same logo as well. Maybe a lead you can follow?

http://www.awa.com.au/about-us/our-history/
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Old 14th Nov 2019, 3:23 pm   #13
Martin G7MRV
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Default Re: AWM1361 IC data?

Thats interesting, yes certainly they have been involved in the industry sectors appropriate to the device! The fact they have a quite in-depth history page suggests that someone with the company is acting as an archivist, so may be able to locate the device info!
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Old 14th Nov 2019, 4:03 pm   #14
Martin G7MRV
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Default Re: AWM1361 IC data?

Ive dropped them a couple of emails. Seems that the current AWA might be a spin-off from the previous company, but there was advice on contacting someone about spares for older equipment.
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Old 15th Nov 2019, 12:13 am   #15
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Default Re: AWM1361 IC data?

Yes, I knew I had seen the previously described "AWM" somewhere before - Australian Wireless Microelectronics.

Good luck with the email, hope they can help.
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