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  • Rouge Un - a red preamp featuring Lundahl , 5534 pumpkin output
    - what are the most appropriate values for the 5534 capacitors ? - output transformer : orig transformer is the infamous "pumpkin" is 1:2+1 so am I right to think my option B wiring is better ? LL1539 is 2:1+1 so option B here is reversing the transformer and using it 1:2 and using 2nd tap of primary as 1:1 output for feedback
  • can a replace NE5532 with a NE5534 ?? | GroupDIY Audio Forum
    In the case of the 5534 the extra pins also allow some change in frequency compensation, not true for the 071 Both singles do allow a trim of offset voltage, not usually a concern in audio apps
  • Discrete opamps in place of NE5534 | GroupDIY Audio Forum
    However If there is a bucket of room on the Eureka board around the 5534 maybe you could pull the 5534 and make an adaptor board and investigate what kind of changes to the compensation circuitry around the opamp would be needed for a 990 etc But its probably packed in fairly tight I would imagine Justin
  • different brands of ne5534 - GroupDIY Audio Forum
    Philips TDA-1034 are the forerunner and the orginal design of NE-5534, maybe it can be interesting to compare this old chip with some of the newer versions --Bo
  • For Sale - Signetics XR philips NE5534 qty 50 | GroupDIY Audio Forum
    working pulls from auditronics console, looking for $100 shipped in the US for all 50 37 signetics: qty22 NE5534AN, qty15 NE5534N 13 XR philips: qty11 NE5534ACP qty2 NE5534CP most date codes are from '78-79 for the signettics, '81 for the XR
  • Biasing GSSL NE5534 Op-Amps into Class A - GroupDIY Audio Forum
    Is class A biasing something that's feasible in the GSSL? [ quote] From a quick glance at the schematic, I don't see any reason why it shouldn't be, at least on the 5534's You'll need to figure out the maximum current that could possibly be drawn from each chip -- maximum voltage output, lowest conceivable load -- and bias for a bit more than
  • NE5534 as mic pre without input transformer | GroupDIY Audio Forum
    So, by comparison, the 5534's high noise is now proportionally less noisy when compared to the stepped up source signal and its noise The transformer steps up the impedance, and places the source in a better spot on the noise figure vs source impedance curve A noise figure vs source impedance curve will look somewhat like a bathtub
  • 5534 options - GroupDIY Audio Forum
    8 ICs: I had one 5534 fail in a circuit all my lifetime in an unpredictable way Otherwise they work or don´t No TL07x or LF35x failure here ever If you see old chips with blackened legs then the silver surface has created oxide which makes contact problems, esp in older sockets with springcontacts
  • ON Semiconductor 5534 | GroupDIY Audio Forum
    I missed that thread Is the On 5534 made the same as the Phillps? Thanks for the link
  • Yamaha m1516 NE5534 Mic Pre version attempting API 2520 Mod. . .
    In addition, the nominal supply voltage (+ -23V) exceeds the maximum ratings of the 5534 (+ -22), which would put a serious doubt to long-term reliability, unless some of the additional components you mention actually drop down the supply - which is also subject to question





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