On 12/13/2010 06:27 PM, Geoffrey Barton wrote: > > On 13 Dec 2010, at 17:00, [email protected] wrote: >> >> Message: 1 >> Date: Sun, 12 Dec 2010 17:53:44 +0000 >> From: Tim BC <[email protected]> >> Subject: [Sursound] Calrec CM4050 Surround Microphone SN: 502 >> To: [email protected] >> Message-ID: <[email protected]> >> Content-Type: text/plain; charset=ISO-8859-1; format=flowed >> >> I have been fortunate to be the steward of a Calrec CM4050 microphone >> and related accessories for the last 18 months or so. Sadly I have not >> been able to do much with it, partly due to a lack of adequate time and >> partly due to a slight mistrust of the mains power supply. I am about to >> return it to its rightful owner. >> >> From its appearance and low serial number (502), I suspect that it is a >> prototype particularly as the pre-amp is covered in handwritten notes on >> masking tape and the connectors are RCA phonos and TS 6.35mm jacks. The >> connector on the base of the microphone is a 6-pin male XLR. The >> connecting lead is a 6-pin XLR-F to four TS 6.35mm jacks and is about >> 1m80 long. This lead is connected to a pre-amp with coarse and fine gain >> switches and then to what would appear to be an A-format to B-format >> converter, the outputs of which appear on 2 sets of 4 RCA phono sockets >> marked NOPQ. I have not had the courage to open the cases to investigate >> their contents. The mic-preamp is mains powered and I suspect provides >> the polarisation voltage for the capsules. The A/B converter appears to >> be passive. > > I think what you are describing is a MKII SFM, as 504,505 and 506 were MKII > development mics we used on the Ambisonics project at Reading Univ in the > late 1970s. The 6 pin xlr is four capsule feeds,50v phantom and gnd.
now remains the question: whose are the mysterious initials on that controller box? -- Jörn Nettingsmeier Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487 Meister für Veranstaltungstechnik (Bühne/Studio), Elektrofachkraft Audio and event engineer - Ambisonic surround recordings http://stackingdwarves.net _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
