24-05-2011, 10:27 PM
I'm sure that this block has been circled many times, although I don't think that it's any disadvantage to do it again. My view is, and has been for a long time, that you really need to know what you're doing. That's easy to say, but more difficult to implement. Particularly with vintage gear it's also very easy to get entirely the wrong impression by using modern meters. Most '50s and '60s measurements will be quoted using an AVO 8, while earlier ones may well be quoted using an AVO 7. Thus, using a modern very high impedance meter, may well give results which confuse those with little experience.
An example, although not with meters, from my past lifetime. I was summoned to Production because apparently the current batch of a particular module (mine) were all failing a very simple test. Sure enough, at first glance, that was true. However, further investigation showed that they were using a 1M Probe not a 10M one as specified.
I've actually seen Posts on other sites saying, effectively, all the voltages are high. Well, with the wrong meter they might well be true.
Alan
An example, although not with meters, from my past lifetime. I was summoned to Production because apparently the current batch of a particular module (mine) were all failing a very simple test. Sure enough, at first glance, that was true. However, further investigation showed that they were using a 1M Probe not a 10M one as specified.
I've actually seen Posts on other sites saying, effectively, all the voltages are high. Well, with the wrong meter they might well be true.
Alan
