Thread: 1920s Direct line telephone/intercom
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Old 14th Jun 2012, 7:45 pm   #19
Ed_Dinning
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Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
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Default Re: 1920s Direct line telephone/intercom
Hi Gents, sometimes the carbon granules in the mic capsules get compacted, try gentle shaking or tapping.

Ed
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