I have seen very many white labeled CR’s with date codes that begin with a 4, as well as a few white labeled CR’s with the phenolic bobbin construction with date codes that begin with 4. These dynamic elements turn mechanical vibrations into electrical signals, where as a speaker turns the electrical signals into mechanical vibrations. Questions?? Some people seem to think that an R5 is some special model. The elements that came in the 707A in the 40’s were model #99-131. Yes, a low Z CM element will not have the gain of a high Z element, but the difference in resistance is much larger, and they’re usually plugging them into a guitar amp that has 1 meg or higher input impedance. Now the 520DX mic is a different story. This plastic bobbin would melt if the microphones lead wires being soldered to the element were not soldered onto the element quickly, causing the elements main lead wires to become loose, or possibly unattached completely from the bobbin. These mics had the biggest, fattest tone you’ll ever hear from a harp mic although it wasn’t made to be a harp specific microphone. Another spec sheet on the 520D from 1986 listed the mic as having a frequency response of 100 to 5,000Hz, which were the dual impedance controlled magnetic elements that for the most part seemed to be a bit brighter than the older models. The armature assembly is held in place by two screws, and part of the assembly that holds the magnet in place. The model 440 uses the exact same model element that the 520 uses! There is a way to get some hints though. Our Gear Advisers are available to guide you through your entire shopping experience. The 520D’s made in the USA had the same green tags that they always had, but they began putting a serial # on them where the impedance used to be stamped. conditions (Opens in new window) for program details. They must be mounted properly with the proper gasket to form an airtight seal around the front, and the back of the element. One spec sheet may say that the elements had a freq. If you’re still having trouble trying to figure out the year your element was made, there are some other clues such as the tags used on the shells that may help, but this information should help you determine exactly when your mic or element was made. It may be because a person happened to get one of a certain model # that sounded better than a couple others that they’ve tried. The spec sheets list them as having an output level of 52.5db below 1 volt per microbar (high impedance models). Rewards members also receive double- and triple-point offers, access to member-only deals, as well as a dedicated phone line to Gear Advisers and a $25 coupon on your birthday, all on us. response of 100 to 9,000 Hz. Shure claims it was made to sound like the old ones, but it doesn’t quite cut the mustard for most harp players. I don’t know for sure, but if your element has this type of label, it’s probably a safe bet to say it’s a 60’s element. The 520DX does not seem to have as much high end as the vintage models, and they all seem to be pretty consistent in tone. I’m not really not a big fan of the Aststic crystals, although they did produce some very good ones from time to time. It has been my experience having had played literally hundreds of these elements, that each one will have some tonal characteristics all its own, having tested them all in the same mic shell using the same cable, amp and settings. The 99C86 was introduced in 1960 and at that time used in the low Z model green bullet mic’s labeled as a 520B, and the desk stand model known as the 520SLB. From 1949 and up to 1951, the black labeled CR’s had an obvious date stamped on them, for example,10-49, or 12-50. Thank you! This is likely attributed to the metal disc on the center of the diaphram. I’ve purchased mic’s with high Z CM’s in them for fifty cents too. In my opinion, all of them! For the most part, the MC151’s, which were discontinued in the late 90’s, had a tone that many describe as “tinny”. Free Standard Ground shipping (48 contiguous states, some overweight and Used/Vintage items excluded). Subscriptions, CA The same goes for the medium Z models. Some of the earliest Mexican made elements have this same label, but have the “Made in USA” blackened out with marker, and are stamped “Assembled in Mexico” on the side of the label. Orders placed before 5 p.m. There are also some that have a raised ,somewhat smaller diaphram with a single hole that were used in military and other handheld communications mics that were designed for use in very noisy environments. Low impedance models were rated at 71.5db below 1 volt per microbar (open circuit voltage). I never collected many of these because finding one in good condition is difficult, and finding one that still works is a lot more difficult, but there are a few out there. It did not have any vent holes in it like the 520, which had 2 small holes drilled in the bottom side of the shell. Most dynamic mic elements work in a similar way, but the design of these CM and CR elements is much different than typical moving coil dynamic elements, which work pretty much the same way a speaker works but in reverse. It was described by Shure as being a high output microphone with good response, high impedance without the need of a transformer that had its stability assured by unique control of the reluctance of the magnetic system. The new 520DX has a regular dynamic element with a plastic diaphram in it.


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