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Old 13th May 2009, 10:53 pm   #61
Nickthedentist
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Default Re: Help a newbie put a GECOPHONE 1000 into service

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When talking on the phone you can hear your voice in the receiver, the speaker bit. I guess that`s not normal and adding one of those two bits in the picture will help. Is this correct and how do I add them?
Sorry, you're mistaken here. It is normal, it's called "sidetone"
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Old 13th May 2009, 10:54 pm   #62
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Default Re: Help a newbie put a GECOPHONE 1000 into service

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You mentioned those two things in the picture earlyer and said we`de get to them later.
OK, now I'm with you.

The white thing is a click supressor and can be wired in parallel with (i.e. across) the earpiece. Easiest way to do it would be between the red and green wires which run to the handset, i.e. terminals T6 and T7 of the 8-way block.

The green thing is a resistor, which can be used to stop the bell stopping other phones on your line ringing properly... though installing it could make the bell rather feeble. One place to install it would be in place of the short wire that links the two bell coils.

Good night,
Nick.

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Old 13th May 2009, 11:34 pm   #63
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Default Re: Help a newbie put a GECOPHONE 1000 into service

Thanks Nick, sweet dreams
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Old 14th May 2009, 12:21 am   #64
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Default Re: Help a newbie put a GECOPHONE 1000 into service

Errr...
Can I just add a small comment here?
You can normally hear your own voice in the earpiece - it's called 'sidetone'.
It's deliberate because a dead earpice sounds odd.
Generally it varies with the impedance match to the line.
Alan
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Old 14th May 2009, 8:33 am   #65
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Default Re: Help a newbie put a GECOPHONE 1000 into service

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It's deliberate because a dead earpice sounds odd.
And it gives your brain some feedback, making you less likely to speak unnecessarily loudly.

Interestingly, mobile phones normally have no sidetone, and users frequently shout as a result ("I'm on the train" etc. etc.).

Nick.
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Old 14th May 2009, 10:21 am   #66
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Default Re: Help a newbie put a GECOPHONE 1000 into service

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Quote:
Originally Posted by AlanBeckett View Post
It's deliberate because a dead earpice sounds odd.
And it gives your brain some feedback
and it can be so bad that it starts howling, acording to the wiki article.

My modern electric phones don`t have it and it`s a bit too loud for my liking on this old phone.

Is there any way to reduce it?
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Old 14th May 2009, 11:14 am   #67
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Default Re: Help a newbie put a GECOPHONE 1000 into service

thumpy,
Don't believe averything you read in the wiki! There should be no howl-round unless the phone is very badly designed or there is a horrible mismatch, and even with a mismatch a well designed pnone should be OK, the sidetone will just be greater.
By 'Modern electic phones' I guess you mean DECTs. They don't have sidetone.
Provided your phone has no faults there's not much you can do about it short of a redesign.
Alan
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Old 14th May 2009, 2:33 pm   #68
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Default Re: Help a newbie put a GECOPHONE 1000 into service

Alan,
You missed a Y out of my name :P
What do you think I beleive? Because I said is can be a really bad and howl, of course this isn`t normal as the wiki states and I didn`t say it was.

I might mean DECTs if that`s what a modern electric phone is :P Acording to the wiki some add back the sidetone, mine doesn`t and I prefer it.

OK so nothing can be done to reduce the sidetone, will just have to live with it.

Thanks
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Old 14th May 2009, 2:57 pm   #69
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Default Re: Help a newbie put a GECOPHONE 1000 into service

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'OK so nothing can be done to reduce the sidetone, will just have to live with it.'
Not sure if the 'Jeekophone' (that is how it's pronounced) has an ASTIC (anti-sidetone induction coil) fitted, ie: the same type of induction coil as fitted to a type 332 telephone, say... Some other types of induction coil may provide more sidetone, but I'll have to dig out my own Jeekophones to check when I get home!

As a bye-the-bye, some modern telephones fitted with VOGAD ICs provide lashings of side-tone and it's a pain - in particular the Ascom 'Berkshire' models. The only way to use them in noisy environments is to press the 'mute' button when listening, which is also a pain... You can't win!
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Old 14th May 2009, 3:14 pm   #70
AlanBeckett
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Default Re: Help a newbie put a GECOPHONE 1000 into service

thumpyy (with an extra y),
Keep calm.
DECTs are the modern cordless phones that you can wander around the house with. As they have a full duplex (digital) circuit between the handset and the base there is always a danger of unwanted feedback, so most try to keep the sidetone low or zero.
All modern phones are 'electronic' in the sense that they contain electronic circuitry. After all, it's very difficult to generate DTMF without it. Having said that, my original comment stands. A properly designed phone should not howl round even if seriously mismatched.
Alan
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