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02-14-2006 Post does not mapped to Knowledge Tree
Romy the Cat

Boston, MA
Posts 10,076
Joined on 05-27-2004

Post #: 1
Post ID: 2081
Reply to: 2081
How to switch moving coil signal

I wonder what kind sound not-impacting methods exist to connect and disconnect signal from moving coil cartridges.  If we are talking about the switching the .1mV signal and monitor the results within a fairly high capacity playback then it become quite difficult to find a transparent switch.  In my past I have tried all imaginable switches: mechanical, some sealed relays and some crazy super expensive mercury switches. None of them were transparent enough. Some sources suggest that the gold relays in inert gas environment might be preferred way to go when the voltage is low…Perhaps to drive the relay’s coils by DC batteries….

Does anyone have any success story how to switch the ultra low voltage (.1mV-.5mV)?

Romy The Cat

"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
02-15-2006 Post does not mapped to Knowledge Tree

United Kingdom
Posts 65
Joined on 12-06-2004

Post #: 2
Post ID: 2084
Reply to: 2081
Re: How to switch moving coil signal

I used telecom grade solid silver/palladium contact relais with heavy goldplating, sealed, gasfilled. They are quite inexpensive, but I found them equal/better than mechanical switches.

Ciao T

"It is to Madame Justice that I dedicate this concerto, in view of the holiday she seems to have taken from these parts." V
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