Quote:
Originally Posted by N2IXK
Do you have a source for this info? Bright light sources in general aren't good for PMTs, as they cause permanently increased dark current and noise output, particularly in very high gain/low light types (which the one in a TV analyst isn't). But in the specific case of the TV analysts, other than a few seconds recovery time after closing the lid, I have never noticed anything in the way of permanent effects. As far as UV goes, the P16 phosphor used in the analyst CRT is largely a UV source, with only a dim output in the purple end of the visible spectrum.
The PMT used in the TV analyst is a 931A type, by far the most common and cheapest PMT available. NOS ones are all over eBay and hamfests for very cheap prices:
http://www.ebay.com/itm/1-NOS-GL-931...-/371693720845 |
Source is Videokarma. Read it in another thread on the 1077/76/75 family, and have observed those words of caution ever since.