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Old 30th May 2009   #21
Dean Roddey
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Joined: May 2008
Location: Mountain View, CA
Posts: 11,329

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Well, so far so good. The LA-2A seems to be working correctly. The meter isn't working right. It works ok on the output side, but I get nothing on the GR side. I've tried the zero adjust pot both ways and it doesn't budge. So something is awry there, but I'm not sure what. And I need to figure out how to be able to get the backlight to work. It's a 12V and all I have available is 6.3VAC I think.

It also doesn't have enough oomph to drive a +4 input to a manly signal level (above -18dBFS'ish) without getting some quite noticeable grunge going. Changing the converters to -10 works fine. It can drive that easily without output distortion (though I can still drive the inputs and get some grunge on it, which is nice.) I'm not sure if this is because I got something wrong or if that's just the nature of the beast with the LA-2A.

So, anyway, another triumph of the human spirit against the tyranny of the machine. If I can get the meter going, I'll be happy. It looks pretty rough. But, in the end, I kind of like it. It has a pre-vintaged, war surplus sort of vibe going on.
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Dean Roddey
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www.charmedquark.com

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