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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment.

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Old 12th Apr 2017, 9:40 pm   #1
1955APREN
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Default AOR AR2700 Fuse?

I have a AOR AR2700 that as gone dead need help in identifying this part(i think It might be a fuse) It as some very hard to read small numbers on it. I think I have read 4.19. If this is a fuse does any one know what value is it?

Please see enclosed photo. Thanks for any information regards, Derrick.
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Old 12th Apr 2017, 10:16 pm   #2
Martin G7MRV
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Default Re: AOR AR2700 Fuse?

certainly a fuse, but couldnt say the value
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Old 12th Apr 2017, 10:19 pm   #3
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Default Re: AOR AR2700 Fuse?

I'd suggest it's a Murata CSA-C series ceramic resonator.
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Old 12th Apr 2017, 11:10 pm   #4
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Default Re: AOR AR2700 Fuse?

Quote:
Originally Posted by McMurdo View Post
I'd suggest it's a Murata CSA-C series ceramic resonator.
In which case probably 4.192Mhz, commonly used in digital circuits for generating the clocks for tone encoding and decoding circuits and other timebases. We use a DTMF decoder IC which uses a 4.192Mhz crystal.

Certainly 4.19A would be an unrealistically high value fuse to find inside a handheld radio scanner.

1955APREN, does this item have a part number (ie, FS1 or X1), screenprinted on the PCB beside it?
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Old 13th Apr 2017, 6:36 pm   #5
Martin G7MRV
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Default Re: AOR AR2700 Fuse?

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Originally Posted by Martin G7MRV View Post
certainly a fuse, but couldnt say the value
Sorry, that should have said "certainly looks like a fuse!

We used very similar looking ones in the Kenwood PMR handhelds I serviced for the Home Office, rated 3A.

As SH suggests, knowing what the silkscreen says in the position it came from in the radio could be decisive
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Old 15th Apr 2017, 7:10 am   #6
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Default Re: AOR AR2700 Fuse?

Thank you all for advice. The PCB does not have any markings on it at all. If it is a fuse then it's OC. I connected it to my component tester and it reads 44pf (a capacitor). It seems that it is a resonator. I will refit it ASAP and look for further faults. Sorry that I did not get back before, had busy week.

Thanks again, Derrick.
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