Recent content by tubeactive

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    Various bits and pieces

    Interesting items ! What are the 1:1 tranny impedances ? Primary current ? Is secondary for SE or PP ? How about some prices ? Are there items you would trade for ? Best Regards...
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    Greetings Fellow Sound Folks !

    Indeed...Thank You...I still think interstage trannies are the best phase inverters for push-pull amps. Where else can you get perfect phase inversion, gain matching and impedance matching in one device ? My reference amps are like a SET amp driving fixed bias, push-pull triodes on one chassis...
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    Tim de Paravicini has Passed

    Tim de Paravicini innovatively applied his unique ideas to many audio delights. His theories proved accurate in all the products he was involved with. He will always be remembered as a sincere, audio mastermind... Rest in Peace, Dear Tim de Paravicini.............................
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    Phono cartridge wiring to do it all...?

    The external switch box needs to be very close to the arm and especially the preamp. Shielding and the shortest leads are super important. With 40db+ of phono gain, that is 100x input voltage. Any stray wiring inside the switch box could cause a hum field. It is doable, certainly... Fellow...
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    Tim de Paravicini has Passed

    RIP Tim de Paravicini ! You are dearly missed. Your audio conviction will always be legendary !
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    Phono cartridge wiring to do it all...?

    Greetings fellow shellac spinner. When I rewired my stereo cartridge for dedicated to Edison Diamond Discs and ReCreation discs service, I tried the one channel out of phase method, but applied a bit differently. I surmised that if I add the jumper between the two + leads, I could take the...
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    What is your ultimate Arm and Cart combination?

    My best arm/cart is not necessarily my favorite. I have an FR-64S by Fidelity Research, with their FR-7 "bugeye" cart. The bass response with this arm, using other mc carts, was the best bass definition I have heard in my systems. Using the "matched" FR-64S/FR-7 combo, the sound is lucid but too...
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    Phono EQ: Origins and Design Elements

    Here are some very informative links for our audio journeys with vintage and modern discs: Playback equalization for 78 rpm shellacs and early 33⅓ LPs - Audacity Wiki a seriously admirable spinning disc p layback EQ compilation by a site specializing in digital transfers. You can DIY your own...
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    Phono EQ: Origins and Design Elements

    So, how can you design your own phono equalization networks for your preamp, you wonder ? There are numerous sites which have calculators for some of the needed formulae. There are literally hundreds of pre-existing phono EQ circuits which you can emulate and build. Whether you use online...
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    Phono EQ: Origins and Design Elements

    Stylus shapes and sizes can also help or hurt our quest for the most natural sound with early mono discs. Use the wrong size and the noises could get louder. Use the right size and the music can snap into focus, overriding any noise. For early 78s, the 3 mil spherical tip is most recommended...
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    Phono EQ: Origins and Design Elements

    Let’s think about playing an early Columbia LP or an NAB transcription disc with the RIAA EQ curve. First, the RIAA EQ will cause increased bass with these discs, sometimes a good thing. The turnover is the same 500Hz, but the Col. LP/NAB treble rolls off quicker than the RIAA EQ, so the LP disc...
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    Phono EQ: Origins and Design Elements

    Post WWII, the American economy boomed pretty quickly, with suburbia popping up across the USA. The baby boomer generation was beginning. While families had gathered around their radios for the news during wartime, dads and moms, as well as the whole family now had good reason to kick back and...
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    Phono EQ: Origins and Design Elements

    When the sound studios began recording discs electronically in 1925, there was only one record cutter, at first, the Western Electric “Rubber Line” Disc Cutting Lathe system. The genius Bell Labs engineers devised a way to increase listening time per side, as well as soon enabling decreased...
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    Phono EQ: Origins and Design Elements

    Phono EQ Origins and Design Elements: Phono playback has come a long way from wind-up phonographs/gramophones. Before 1925, all shellac discs, whether 78, 80 RPM, faster or slower, the cylinders or discs were recorded acoustically. The musicians would gather around the bell of the horn, used as...
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    Greetings Fellow Sound Folks !

    Thank You, Sir ! I am glad to be here !
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