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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
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28th Aug 2010, 2:24 pm | #1 |
Hexode
Join Date: Jul 2008
Location: Garstang, Lancashire, UK.
Posts: 283
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Telephone fault - advice welcomed!
Hi I have a wall mounted 741 rotary dial phone. Been in house years and was converted by BT to a modern plug - and continued to work well.
Anyhow, when calling or answering the line is now very poor - crackly low volume etc. However sometimes if you dial, or if you hold your finger slightly on the reciever without cutting off the call the line clears?? Any ideas what the problem may be (in laymans terms!) would be most appreciated. I am still on a BT line and plugging another more modern phone into the box gives a clear line to the exchange. Thanks Luke |
28th Aug 2010, 4:27 pm | #2 |
Dekatron
Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
Posts: 3,687
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Re: Telephone fault - advice welcomed!
Do you mean holding your finger slightly on the cradle-switch, where you replace the handset, or the receiver (the thing in the handset that you place next to your ear)?
If you mean the cradle-switch it sounds like you have dirty contacts in there. I think a 741 has a sealed micro-switch in it. There's a cct-diagram here, and you can disconnect the switch terminals as appropriate and buzz them out, although it might be just as easy to fit a new micro-switch from a 'scrapper'.
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Regds, Russell W. B. G4YLI. |
28th Aug 2010, 5:07 pm | #3 |
Hexode
Join Date: Jul 2008
Location: Garstang, Lancashire, UK.
Posts: 283
|
Re: Telephone fault - advice welcomed!
Hi - sorry for the confusion - it is the cradle switch.
Can new switches be purchased? Anyone got a spare I could buy??Thanks |
28th Aug 2010, 5:23 pm | #4 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,127
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Re: Telephone fault - advice welcomed!
Your best bet is probably eBay. Assuming that this uses the same switch as the standard 746, they crop up quite frequently.
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