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 Post subject: Dolcher volume regulator
PostPosted: Fri Oct 06, 2017 8:26 pm 
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Victor III
Joined: Tue Jun 24, 2014 10:12 pm
Posts: 635
Anyone have any comments on how well the Dolcher volume regulator works?


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 Post subject: Re: Dolcher volume regulator
PostPosted: Sat Oct 07, 2017 12:17 am 
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Victor V
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Joined: Tue Dec 14, 2010 1:17 am
Posts: 2690
Location: Where there's "hamburger ALL OVER the highway"...
jboger wrote:
Anyone have any comments on how well the Dolcher volume regulator works?


I don't have one on my BI; but anything that presses on the diaphragm is going to reduce its compliance, and increase record wear...

Bill


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 Post subject: Re: Dolcher volume regulator
PostPosted: Sat Oct 07, 2017 7:24 am 
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Victor III
Joined: Tue Jun 24, 2014 10:12 pm
Posts: 635
I rather doubt that it works at all. When the mica diaphragm vibrates back and forth, it does so with a displacement that can't be more than a few thousandths of an inch. With that sort of displacement, the felt pad that makes contact with the mica can't be adjusted to regulate the sound; the sound is either on or off. There is a very, very narrow adjustment band in-between the on and off positions that probably has to do with the slight compression of the felt pad, but this regions only leads to a harsh sound.

I don't think this thing ever worked as a sound regulator. The only thing I see that it could do was turn off the sound without having to lift up the tone arm. But what advantage that conferred, I don't know.

I wonder how Columbia marketed this feature.


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