So it seems my trusted (15 years?) Crown GLM 100 microphone has given in. A recording attempt yesterday revealed too much noise. I think because its output has deterioated, so that the noise floor is raised to much because of the high gain needed. Is this common? Apparently they are hard to find fx on ebay. So if anyone comes across one or has one for sale I am interested. Their size and physical design makes it easy to use without a goose neck or anything. For now I am using a single element Underwood that I never really got to test out, so it will be interesting. I also have a Shadow, but the Underwood seems most promising.