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Old 19th Nov 2009, 11:06 am   #1
GrahamN
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Default 746 Microphone Problem?

I know pretty much nothing about phones, but I've recently obtained an old 746 telephone which I've put into regular use as an extension. Several people have told me, though, that my voice is fairly faint - so presumably I need a new mic for this?

Are they still obtainable, and can someone recommend a supplier?

Alternatively, if it's unlikely to be the mic, is there anything else I can do? The extension cable is very long - probably about 30 metres or so, and could be shortened (but only with a lot of work drilling through walls and passing the cable through a loft space). I'm assuming this isn't the problem though as I can hear callers without any problem.

Any advice welcome!

Thanks

Graham
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Old 19th Nov 2009, 11:14 am   #2
Nickthedentist
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Default Re: 746 Microphone Problem?

Hi Graham,

Try replacing the mic. first of all as the old carbon granule microphones do fail. The preferred replacement is a special electronic one (red plastic case with an IC made by Ferranti inside) called a "transmitter 21A". They turn up on eBay, and someone here was selling them recently (do a forum search).

The length of your extension wire is irrelevant; these phones were designed to work on wires several miles long!

Nick.
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Old 19th Nov 2009, 11:40 am   #3
GrahamN
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Default Re: 746 Microphone Problem?

Thanks Nick

I'll try and find one and see how it goes.

Graham
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Old 19th Nov 2009, 1:40 pm   #4
SeanStevens
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Default Re: 746 Microphone Problem?

I have some - Send me a Personal Message and we can sort out details.

SEAN
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