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Amplifier power
In article , Marky P
scribeth thus On Wed, 15 Oct 2008 20:58:29 +0100, tony sayer wrote: In article , Eeyore rabbitsfriendsandrel scribeth thus tony sayer wrote: Eeyore scribeth thus Robert Orban wrote: says... Seems to be tricky to find anything actually. This mic has a max input SPL of 134dB which receives the comment "Hi-SPL handling is perfect for suspension over choirs and orchestras" http://www.dv247.com/invt/11582/ Try this: Dynamic-Range Requirement for Subjectively Noise-Free Reproduction of Music JAES Volume 30 Issue 7/8 pp. 504-511; August 1982 A dynamic range of up to 118 dB is determined necessary for subjectively noise-free reproeuction of music in an audio recorder with a white-noise floor. Maximum peak sound-pressure levels in music are compared to the minimum discernible level of white noise in a quiet listening situation. Microphone noise limitations, monitoring loudspeaker capabilities, and performance environment noise levels are also considered. Author: Fielder, Louis D. Affiliation: Ampex Corporation, Redwood City, CA Well, I never imagined I'd have Bob Orban backing me up on a technical issue ! Thanks Bob ! Graham Him being the one who will be criticised on other groups for making DAB and FM ever more distorted;!... -- Tony Sayer You can't win 'em all ! No but theres a local station round these parts where the engineer does give a monkeys but the programme controller only knows LOUD LOUD and LOUDER!!! cos the bloke at the other station down the road is the same;; All thinking LOUD is better.. The local community station ****es over all of them for absolute sound quality:)).. Graham What station's that then? http://www.209radio.co.uk Soon to have a new upgraded mixed polarisation aerial system to improve coverage:).. Pix on mb21 as soon as its done, with the newly refurbished one at Ely Cathedral.. Marky P. -- Tony Sayer Bancom Communications U.K. Tel+44 1223 566577 Fax+44 1223 566588 4 Wingate close, Cambridge, England, CB2 9HW E-Mail |
Amplifier power
In article , Eeyore rabbitsfriendsandrel
scribeth thus tony sayer wrote: Eeyore scribeth thus Thanks Bob ! Graham Him being the one who will be criticised on other groups for making DAB and FM ever more distorted;!... -- Tony Sayer You can't win 'em all ! No but theres a local station round these parts where the engineer does give a monkeys but the programme controller only knows LOUD LOUD and LOUDER!!! cos the bloke at the other station down the road is the same;; All thinking LOUD is better.. The local community station ****es over all of them for absolute sound quality:)).. What's a community station ? :-( For me, radio is all but finished. Apart from Radio 4 of course. It's the same pap from every broadcaster. I can even recall several times changing channel and finding the very same track being played on the new one. Grrrrrrrr. Its a version of small scale local radio with very public access to offer more locally focused programming. Some downright weird .. some wonderful:) Sunday's are excellent and "evening under lamplight" is as good as anything the BBC could produce.. But NO centralised playlists and no talking down to the listener like BBC local radio. Almost entirely staffed by volunteers.. http://www.209radio.co.uk/schedule/ Graham -- Tony Sayer |
Amplifier power
On Wed, 15 Oct 2008 23:11:16 +0100, Eeyore
wrote: Marky P wrote: Eeyore wrote: Arny Krueger wrote: "tony sayer" wrote I Wonder how may pro recording bits of gear are around with 5532's;).. Tons and tons. But 5532s used right are really very good pieces, even by modern standards. And for the price...! And to think they were around in the 1970s too ! And Philips / Signetics initially only thought they were going to sell it into the telecoms market because of the 600 ohm drive ! Philips = NE5532 Signetics ( Philips N.A.) = SE5532 btw. The scarier part is how may pro recording bits of gear are around with TL074s, or even NJM4558s in the signal path. TL07Xs are still ok for some stuff, especially because of the jfet front end but 4558s ? YUCK ! Graham Well, since we're on the subject of IC's, I've dug out my little drawer of IC's left over from my 80's electronics days :-) Can't remember if any of these are op amps, but here are the numbers: LM382N LM380N Maybe a crappy low power audio amp. LM3482A No idea about the above. LM741 (pretty sure this is an op amp) Pretty lousy one too by today's standards. M5K4164ANP (ain't a bloody clue what this is) Sounds like a Mostek part number. Does it have lots of legs ? Yep. 16. TIP31A TO-220 medium power transistor. Forget which polarity. ZTX300 (a little 3 pin thing) Ferranti (now Zetex) small signal npn ? transistor. Their version (E-line) of TO-92. ZN414 (this is an FM radio on a 3 pin chip) For a TRF design. MJE2955 PNP complement of the 2N3055. TO-3 115W 60V device. NE555P (loads of these buggers, I know they are timers). They are. Single timers. Graham Thanks for that! Now I've gotta decide whether to bin 'em or keep 'em for nostalga's sake :-) Marky P. |
Amplifier power
On Wed, 15 Oct 2008 23:04:45 +0100, Eeyore
wrote: tony sayer wrote: Eeyore scribeth thus Thanks Bob ! Graham Him being the one who will be criticised on other groups for making DAB and FM ever more distorted;!... -- Tony Sayer You can't win 'em all ! No but theres a local station round these parts where the engineer does give a monkeys but the programme controller only knows LOUD LOUD and LOUDER!!! cos the bloke at the other station down the road is the same;; All thinking LOUD is better.. The local community station ****es over all of them for absolute sound quality:)).. What's a community station ? :-( For me, radio is all but finished. Apart from Radio 4 of course. It's the same pap from every broadcaster. I can even recall several times changing channel and finding the very same track being played on the new one. Grrrrrrrr. Graham People used to slag off ILR radio in the past, but it's much worse now than it's ever been! Haven't listened in a long time (only for evaluation purposes). Marky P. |
Amplifier power
On Thu, 16 Oct 2008 08:55:57 +0100, tony sayer
wrote: In article , Marky P scribeth thus On Wed, 15 Oct 2008 20:58:29 +0100, tony sayer wrote: In article , Eeyore rabbitsfriendsandrel scribeth thus tony sayer wrote: Eeyore scribeth thus Robert Orban wrote: says... Seems to be tricky to find anything actually. This mic has a max input SPL of 134dB which receives the comment "Hi-SPL handling is perfect for suspension over choirs and orchestras" http://www.dv247.com/invt/11582/ Try this: Dynamic-Range Requirement for Subjectively Noise-Free Reproduction of Music JAES Volume 30 Issue 7/8 pp. 504-511; August 1982 A dynamic range of up to 118 dB is determined necessary for subjectively noise-free reproeuction of music in an audio recorder with a white-noise floor. Maximum peak sound-pressure levels in music are compared to the minimum discernible level of white noise in a quiet listening situation. Microphone noise limitations, monitoring loudspeaker capabilities, and performance environment noise levels are also considered. Author: Fielder, Louis D. Affiliation: Ampex Corporation, Redwood City, CA Well, I never imagined I'd have Bob Orban backing me up on a technical issue ! Thanks Bob ! Graham Him being the one who will be criticised on other groups for making DAB and FM ever more distorted;!... -- Tony Sayer You can't win 'em all ! No but theres a local station round these parts where the engineer does give a monkeys but the programme controller only knows LOUD LOUD and LOUDER!!! cos the bloke at the other station down the road is the same;; All thinking LOUD is better.. The local community station ****es over all of them for absolute sound quality:)).. Graham What station's that then? http://www.209radio.co.uk Soon to have a new upgraded mixed polarisation aerial system to improve coverage:).. Pix on mb21 as soon as its done, with the newly refurbished one at Ely Cathedral.. Marky P. Oh, of course. Should've known ;-) Marky P. |
Amplifier power
Marky P wrote: Eeyore wrote: Marky P wrote: M5K4164ANP (ain't a bloody clue what this is) Sounds like a Mostek part number. Does it have lots of legs ? Yep. 16. Ah ! 4164. That's ancient DRAM 64k x 1 IIRC. Graham |
Amplifier power
Marky P wrote: Eeyore wrote: Marky P wrote: ZN414 (this is an FM radio on a 3 pin chip) For a TRF design. IIRC I recall someone once asking for one of those sci.electronics.components. You could offer them on there rather than junk them. Graham |
Amplifier power
Marky P wrote: Eeyore wrote: tony sayer wrote: Eeyore scribeth thus Thanks Bob ! Graham Him being the one who will be criticised on other groups for making DAB and FM ever more distorted;!... -- Tony Sayer You can't win 'em all ! No but theres a local station round these parts where the engineer does give a monkeys but the programme controller only knows LOUD LOUD and LOUDER!!! cos the bloke at the other station down the road is the same;; All thinking LOUD is better.. The local community station ****es over all of them for absolute sound quality:)).. What's a community station ? :-( For me, radio is all but finished. Apart from Radio 4 of course. It's the same pap from every broadcaster. I can even recall several times changing channel and finding the very same track being played on the new one. Grrrrrrrr. People used to slag off ILR radio in the past, but it's much worse now than it's ever been! Haven't listened in a long time (only for evaluation purposes). BBC local radio is better ( three counties here ) but it's still sonic wallpaper. And the number of people who ring in about their cat / dog / hamster etc. Drives you up the wall. Graham |
Amplifier power
On Thu, 16 Oct 2008 14:02:20 +0100, Eeyore
wrote: Marky P wrote: Eeyore wrote: tony sayer wrote: Eeyore scribeth thus Thanks Bob ! Graham Him being the one who will be criticised on other groups for making DAB and FM ever more distorted;!... -- Tony Sayer You can't win 'em all ! No but theres a local station round these parts where the engineer does give a monkeys but the programme controller only knows LOUD LOUD and LOUDER!!! cos the bloke at the other station down the road is the same;; All thinking LOUD is better.. The local community station ****es over all of them for absolute sound quality:)).. What's a community station ? :-( For me, radio is all but finished. Apart from Radio 4 of course. It's the same pap from every broadcaster. I can even recall several times changing channel and finding the very same track being played on the new one. Grrrrrrrr. People used to slag off ILR radio in the past, but it's much worse now than it's ever been! Haven't listened in a long time (only for evaluation purposes). BBC local radio is better ( three counties here ) but it's still sonic wallpaper. And the number of people who ring in about their cat / dog / hamster etc. Drives you up the wall. Graham Three Counties here too (near St. Neots). Actually, I think BBC local radio has generally improved over the years. I prefer talk radio to music radio generally. Marky P. |
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