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Srle

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About Srle

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    Serbia

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  1. Srle

    Da li je ovo tačno ?

    Na povom mestu : https://www.vinylengine.com/turntable_forum/viewtopic.php?f=18&t=79810 nađoh ovu trvrdnju: I'd suggest to avoid cables with more than one inner conductor for phono use with regular, unbalanced amplification, cause that just causes extra capacity - and how much exactly will depend on the configuration. 1) For example, if you'd use the Mogami 2549 configured with one conductor plus shield for the signal ground and the other conductor for the signal, the capacity would be the sum of the conductor to conductor plus the conductor to shield capacity (and that regardless, whether the shield would be connected on both sides or on one side only). 2) In case you'd use both inner conductors together for the signal and the shield for the signal ground, the actual capacity would be twice the conductor to shield capacity. And the fun thing is, even if you'd just use one conductor for the signal and the other for the signal ground, while leaving the shield unconnected on either side, the total capacity would now be the conductor to conductor capacity plus half the conductor to shield capacity due to electrostatic induction. Well, and with the Mogami 2534 things would become even more complicated due to even more inner conductors and hence also even more possible configuration variants. Thus I'd rather suggest you to keep it simple, and for example consider 2964 or 2546 instead. Oba maju chracteristic impedance 75 Ohm, 2964 (57pF/m), 2546 (62pF/m).
  2. Srle

    Kapacitativnost phono ulaza

    Pa piše oznaka u šemi. Pored tih kondenzatora od 100 pF i 220 pF stoji slovo P, a legendi pri dnu piše P - Polypropylene film capacitor
  3. Srle

    Kapacitativnost phono ulaza

    Pa onda bi ukupna kapcitativnost MM preampa bi po shemi bila 420 pF po kanalu (C1052/53 i C1002/03) + (C1016/C1017) = 200 + 220. To mi izgleda malo preterano ?
  4. Srle

    Kapacitativnost phono ulaza

    Da li se iz sheme vidi koji otpornik za MM određuje load impedance od 47K. R1039/R1040 ?
  5. Srle

    Kapacitativnost phono ulaza

    Pa i nema tu otkrivanja tople vode. Sve je to u ovoj oblasti manje više poznato.
  6. Srle

    Kapacitativnost phono ulaza

    Misliš na Q1017/Q1018 ?
  7. Srle

    Kapacitativnost phono ulaza

    Evo u prilogu je cela stranica iz manuala koja se odnosi na phono karticu. Pogledaj da li se tu vidi takav kondenzator. Yamaha-AS-2100-Service-Manual(full permission) 79.pdf
  8. Srle

    Kapacitativnost phono ulaza

    Niste me razumeli ni ti ni ZM. Nisam hteo da skidam taj, nego sam pomislio da on zbog znatno većeg kapaciteta (100 nF, 16 V) u odnosu na (1052/53 1002/03) koji su po 100 pF, nije namenjen uklanjanju RF smetnji nego ukljanjanju DC komponente u ulaznom signalu ?
  9. Srle

    Kapacitativnost phono ulaza

    Malo sam pažljivije pogledao šemu. C1001 je 100 nF, 16 V. Da on nije možda predviđen da ukloni DC komponentu iz ulaznog signala ? Pošto je mnogo većeg kapaciteta od C1002, C1053 i C10071 koji su po 100 pF i filtriraju RF smetnje ?
  10. Srle

    Kapacitativnost phono ulaza

    Gde u phono preampu ili kraćim kablom ?
  11. Srle

    Kapacitativnost phono ulaza

    Znam za to. Samo po kalkulatoru sa Vinyl Engine sitea: http://www.vinylengine.com/cartridge_database_tools.php#CartridgeAmpElectricalLoading a za AT 440 (490 mH, recommended load 47 kOhm) mogu najviše 222 pF da imam da 47 kOhm bude optimal loading. A 200 pF imam samo na phono ulazu. Znači ostaje mi samo 22 pF za interkonekt + tonearm wiring, što je neralno. Za nekih realnijih 350 pF ukupno (200 pF na phono ulazu + 150 za dovodne kablove), morao bih da ulaznu otpornost spustim na 37,4 kOhm. Može i to pomoću Y adaptera, sa otpornikom u paraleli.
  12. Srle

    Kapacitativnost phono ulaza

    OK, hvala.
  13. Srle

    Kapacitativnost phono ulaza

    Znači ukupno 200 pF, ako su oba po 100 pF ?
  14. Srle

    Kapacitativnost phono ulaza

    Može li se na osnovu dela šeme na slici, reći kolika je kapacitativnost phono ulaza na ovoj kartici. Koliko ja vidim to određuju kondenzatori C1002/C1003. Njihova vrednost je po sevice manualu 100 pF, 630 V. Nije mi jasno koja je svrha kondenzatora C1071/C1053, i C1072/C1052 ?
  15. Srle

    Kupuj dok nije otišlo...

    Šta li je ovo da toliko košta ? http://www.hifido.co.jp/KW/G/P0/A10/E/0-10/S5/C17-09912-38704-00/
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