Alba CB H2 No sound - UK Vintage Radio Repair and Restoration Discussion Forum

Electricdreams · 22nd Oct 2012, 4:38 pm

The Alba CB H2 powers up and I can see the meter swinging as it's receiving a signal but there's no sound nor hiss. I've even checked the squelch.

Does anyone have schematics for this one?

Peter.N. · 22nd Oct 2012, 4:55 pm

You need to get inside it with a meter, it will quite likely be the audio output IC or transistors.

Peter

Jonster · 22nd Oct 2012, 5:25 pm

Have you got a microphone connected? The received audio often passes through the PTT.

Electricdreams · 22nd Oct 2012, 6:31 pm

Quote:

Originally Posted by Peter.N.

You need to get inside it with a meter, it will quite likely be the audio output IC or transistors.

Peter

I'll have a go.

Quote:

Originally Posted by Jonster

Have you got a microphone connected? The received audio often passes through the PTT.

It's a handheld

davidw · 22nd Oct 2012, 7:22 pm

Has it got a headphone/extension speaker socket? The speaker cut out contacts on these often fail. If it has one and works if you plug in headphones it will be the jack faulty.

Electricdreams · 22nd Oct 2012, 7:52 pm

Quote:

Originally Posted by davidw

Has it got a headphone/extension speaker socket? The speaker cut out contacts on these often fail. If it has one and works if you plug in headphones it will be the jack faulty.

No, the only sockets are ext. ant and 12v dc jack

SiriusHardware · 29th Nov 2012, 2:22 am

Quote:

Originally Posted by idlerbiker

The Alba CB H2 powers up and I can see the meter swinging as it's receiving a signal but there's no sound nor hiss. I've even checked the squelch.

Does anyone have schematics for this one?

Is this one of the ones with a flat clear plastic diaphragm speaker? They have a habit of going open-circuit. Tried measuring the speaker coil resistance?

22nd Oct 2012, 4:38 pm	#1
Electricdreams Hexode Join Date: Mar 2008 Location: Manchester, UK. Posts: 478	Alba CB H2 No sound The Alba CB H2 powers up and I can see the meter swinging as it's receiving a signal but there's no sound nor hiss. I've even checked the squelch. Does anyone have schematics for this one? __________________ What have you bought now??

22nd Oct 2012, 4:55 pm	#2
Peter.N. Dekatron Join Date: Jul 2008 Location: Charmouth, Dorset, UK. Posts: 3,601	Re: Alba CB H2 No sound You need to get inside it with a meter, it will quite likely be the audio output IC or transistors. Peter

22nd Oct 2012, 5:25 pm	#3
Jonster Heptode Join Date: Apr 2008 Location: Eastbourne, East Sussex, UK. Posts: 671	Re: Alba CB H2 No sound Have you got a microphone connected? The received audio often passes through the PTT.

22nd Oct 2012, 7:22 pm	#5
davidw Heptode Join Date: Sep 2006 Location: Woodbridge, Suffolk, UK. Posts: 643	Re: Alba CB H2 No sound Has it got a headphone/extension speaker socket? The speaker cut out contacts on these often fail. If it has one and works if you plug in headphones it will be the jack faulty. __________________ Dave G1AGK. My perception is my reality!