Posted on Monday, 9th January 2012 by Auw Jimmy

I always have dream to have a separate and dedicated passive volume control. There was a time when I was offered to acquire few sets of Grayhill ‘M’ series rotary switch. Although it has 7 Decks which definitely overkill for most application, but seeing the quality of the switch, I decided to grab some.

Although ‘M’ Series from Grayhill is not Military qualified switch, but it meets the requirements of MIL-S-3786 which covers moisture resistance, medium and high shock, vibration, thermal shock (from minus 65 up to over 125 degree Celsius), salt spray, explosion, terminal strength (2 lbs pull minimum), and stop strength (15 pound-inches minimum). Quite convincing, huh? The simple but major different is, the ‘HS’ Military grade will have a sealed shaft and panel. That will make a lot of different in ‘heavy’ environment, but probably not much at home.

Each switch is bundled inside a plastic tube. Nice and convenient way to carry the switch and also easy to be put on the storage bin.

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Tags: Attenuator, Grayhill, Military, preamp, Switched, volume control
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Posted on Saturday, 4th April 2009 by Auw Jimmy

I’m thinking of a digital volume control, instead of passive one (with potentiometer or stepped attenuator). Hmm… Searching around the net, I found some IC from Maxim. I grabbed some (with different packaging and functionality). Now I need to think how to create a new jig with this IC

Time to leave “analog” world? Well, I’m thinking about it…

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Tags: Attenuator, digital, IC, maxim, potentiometer, volume control
Posted in Collectible Stuff, DIY Audio, Personal | Comments (3)