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Balanced phono carts
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Posted on March 15, 2017 at 09:09:07 | ||
Posts: 1800
Location: Omaha NE Joined: September 8, 2006 |
Why on earth are phono cables NOT twisted pair? Common mode rejection of differential amps is the reason for existence of twisted pairs used everywhere for data. Yes, there would be some extra cable capacitance which could be addressed in a couple of ways, the best being putting the phono preamp in the turntable (short leads, low capacitance). I suggested a six-wire cartridge to Grado (center ground and two opposite-phase signal leads) which was promptly ignored. That would be backward compatible (with no mods you could use a four-wire connection). Hum sucks, and it seems easy to prevent by adopting existing twisted pair methods. |
Right! nt, posted on March 15, 2017 at 12:43:38 | |
Posts: 4778
Location: Minnesota Joined: April 24, 2002 |
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Lo-Z microphones have always been wired that way NT, posted on March 15, 2017 at 17:41:12 | |
Posts: 2958
Location: N. Carolina Joined: February 16, 2004 Contributor Since: December 3, 2015 |
nt |