![]() ![]() Stamped Prototype U47 data analogs, also while sampling mean frequency response progressions I then realized andīecame disenchanted with the Philips EF 12 valve, most certainly the weak link in the chain, and within the blink of anĮye I quickly Master-carded a "STUPID-PRICEY" NIB Telefunken EF 14 valve via eBay just to affirm my unquestionable Supplies and began to test circuit component efficiency / compatibility tolerance analogs against the 1946 the rubber Recently I started to monkey around with my all but forgotten money pit of a project. The rebuilding of the internal frame with the mounted components and Mic capsuleĭiaphragm element had been roughly completed so I put the project to rest (shoe boxed) for a few dozen lunar cycles. ![]() (you can clearly see how the side braces of the frame were bent, stressed, manhandled and shaped in order to properly I found aĬheap structure frame ($25) to hold the mic components which was not made for the U47 but could easily be modified, Parts were the mic capsule, transformer, terminal disc and a slightly damaged special valve socket mount. Started over 2 years ago and stalled by a lack of confidence and commitment. My Crushed vintage Telefunken U47 condenser valve microphone (made by Neumann) is beginning to get a major
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