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low noise alloy solder

HiFi, LoFi, Tubes, Transistors, ICs, Commercial, DIY

Postby rob g » Tue May 01, 2012 12:00 am

I am advised that cadmium alloy solder reduces thermal noise and offsets at the input to high quality audio amplifiers. Because of safety concerns, this product is no longer available. Is there a replacement? Searches of this forum and the internet were inconclusive.
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Postby phonoplug1 » Mon May 07, 2012 12:00 am

Don't know about the use of cadmium solder, but I heard that the use of silver solder was good for audio.
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Postby ricks » Thu May 24, 2012 12:00 am

Cadmium alloy solder, that is a first for me!! Reduces thermal noise??? Used for Aluminum and Stainless Stell soldering.
I found a source,
http://www.kappalloy.com/cad-zinc-solder.php
Good luck with this, as cadmium is banded for ROHS compliance.
Silver solder has been used for years in RF because it has lower skin effect & IR losses, for audio I can not see any advantages what so ever unless you are talking very hi power amplifiers or RF circuits.

Rick
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Postby rob g » Sun May 27, 2012 12:00 am

Referenced in a few internet sites, one being www.edn.com/contents/images/82758.pdf
Attachments
cadmium.tiff
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Postby ricks » Wed Jun 06, 2012 12:00 am

Tried your link, failed
http://www.edn.com/error/NotFound
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Postby dr56ujdtgcbjh » Mon Jun 11, 2012 12:00 am

up!
'
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Postby rob g » Sun Aug 26, 2012 12:00 am

Regret the dead link. Thermocouples require low noise connectors and and now most manufacturers use cadmium-free poly but this is probably not suitable for PCB work, Google terms thermocouple cadmium will throw up some updated info. Again-regret inconvenience-Rob
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Postby liza » Mon Oct 22, 2012 12:00 am

good post
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