HP410B Restoration And Alignment More Was Wrong Than I Thought
Ғылым және технология
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In this video we take a look at and repair another one of the early lab grade meters from HP this time to complement the 412 we look at a 410B. The prices on these meter have been nuts recently and I do not think they should be that high fortunately I did not pay anything near the auction site prices for it. But I did have to drive a bit to pick it up. But for now this should shore up a hole in my available test equipment and get me some much needed VTVMs on the bench.
** Repair exposes the Tech to mains electric and should only be done by trained personal. Errors can be fatal. **
Пікірлер: 3
I picked up my 410b for 19 dollars. It needed allot of work. but I absolutely love it. One comment is, the cal pots on those meters are really finicky until the have been cleaned several times. The meter sits for 2 weeks then no deflection because a trim pot opens up. I finally gave them several cleaning passes. They have been working ever since. But they really are the weakest link.
I spent way too much time with that meter when I was restoring Les Paul’s API console. We’re good friends, those meters and I. It didn’t need to be that good a meter but it’s what we had in his basement-of-wonders so we used it.
The main issue I had with my 410B was the meter movement, see: kzread.info/dash/bejne/lK53ldiGaMnXeso.html The HP design had low zero drift, I also have a Marconi TF-1041B VTVM which has similar specifications but the zero is less stable than the 410B.