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Test gear
A net aquaintance asked me what he needs for test gear to dial in a
boatanchor. He told me he had a signal generator, vtvm, and a toob tester. I thought a scope might be a good addition to his bench and recommend a used BK. They seem to be a good buy and plenty guys have them and service info I think is easy to get. I have Tek 465 but I don;t think that is a good scope for basic bench. Too complicated and prone to fail and so forth. I would like to hear comments on my recomendation for scope and also if there is some other piece of gear he should have. 73 NEO |
Test gear
N9NEO wrote:
A net aquaintance asked me what he needs for test gear to dial in a boatanchor. He told me he had a signal generator, vtvm, and a toob tester. I thought a scope might be a good addition to his bench and recommend a used BK. They seem to be a good buy and plenty guys have them and service info I think is easy to get. I have Tek 465 but I don;t think that is a good scope for basic bench. Too complicated and prone to fail and so forth. I would like to hear comments on my recomendation for scope and also if there is some other piece of gear he should have. 73 NEO A scope may be overkill for a simple alignment, but they ARE fun to play with for more exacting diagnostics. I use a few, depending: A Supreme my grandfather used in his shack. (Bought a NOS CRT a few years ago. At the WWII price.) It's not at all accurate, or even calibrated, with an ungraduated screen, but as a qualitative tool, it's fine. I use a Pocketscope for general work on the bench. A 100Mhz dual trace by Monsanto for serious diagnostics, and a Tek 453 when I need more vesatile triggering/delay sweep. Truthfully, I could get away with the Tek alone. But I have a fondness for toys. For most boatanchor alignments, I use WWV as a frequency standard, calibrate my signal generator to it, and with a VTVM, pretty much get it done. It's possible to use a scope as a more precise voltmeter for zeroing in an exact position of a trimmer or a slug, but a careful hand, a good eye and a little practice can get you there with only a voltmeter. And remember, you don't need a lot of highly calibrated instruments, here, you're only going for peaks and minima. I rarely need a sweep generator, or a marker generator unless I'm doing some FM work. So, your recommendations are pretty much spot on. |
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