Есть FK http://www.voltmaster.ru/cgi-bin/qwe...10&group=10605. В 2 раза дороже и, говорят, даже лучше.
Если и разовьют эту тему опять, то цены буду совсем другие...
Есть FK http://www.voltmaster.ru/cgi-bin/qwe...10&group=10605. В 2 раза дороже и, говорят, даже лучше.
Если и разовьют эту тему опять, то цены буду совсем другие...
Ну это и так ожидаемо - в платане были самые дешевые панасоники, дешевле ибея, вобщем САМЫЕ.... Недавно захотел еще себе прикупить - а там уже выбирать не из чего
Однако я считаю, что лучше уж пусть будут панасоники по новым ценам, чем не будет вобще ничего. Сейчас вот захочешь купить комплект кондеров на усилок - и начинается нервотрепка - в одном магазине есть половина нужных номиналов, в другом есть , и сидишь думаешь какбы заказть чтобы за доставку не вышло больше чем за сами детали![]()
Фторопластовые конды пр-ва Samopal. Сравнивал с Вима ФКП - те безнадежно проиграли (не говоря уж об NP0). На ВЧ вообще не сравнимы. Безындуктивные, выводы приварены. Емкости до 4,7 нФ делаются очень просто. Может изврат, но для себя несколько штучек намотать можно.
На стержень наматываются пара полос фторопласта (брал из кондеров ФТ3) и фольги и плотно затягиваются. Размеры для 1000 пф где-то 0,8 на 18см. У фольги необходимо оставить выступы по краям, к которым привариваются выводы из МГТФ. Сваривал дугой с помощью электролита на 44000 мкф, заряженного до 20В. Желательно не пачкать обкладки: наматывать в хирургических перчатках.
Ничего проще я не придумал. Простой обжим не прокатит. Можно попробовать контактную сварку. Или взять, как уже сказали, медную фольгу.
Главное, как мне кажется
- плотность намотки. Я зажимал готовый рулон пальцами и вращал стержень пока не перестанет увеличиваться емкость. Затем делал подгонку до нужной величины.
- чистота обкладок и диэлектирка
- хорошо бы просушить конды под высокой температурой и загерметизировать
А объясните пожалуйста, в чем отличия X1 от X2 и Y1 от Y2 конденсаторов (которые используются в фильтрах для подавления ЭМИ)
Отсюда http://www.hificollective.co.uk/comp...apacitors.html
WHICH AUDIO CAPACITOR?
Which capacitor to use is difficult to determine without actually trying. It depends on too many factors. To hear the potential of a certain part, it*s often nessecary to change other parts too. Experimenting with different combinations is a more solid way to lift a design to a higher level. In principle the original music signal has to be preserved as much as possible, but it*s difficult to tell which parts do. For analysing a music signal (harmonic structures changing in time), our ears are still the most useful instrument. But we*re all calibrated differently. To some a SILMIC adds color and warmth and a Black Gate FK sounds neutral. To others a SILMIC sounds neutral because it exactly reproduces natural colors and warmth from the recording, a Black Gate FK sounds more *hifi* to them, making the signal more pulsed, peaky (giving attack) and too clean (filtering out natural timbres).
Often a combination of different (high quality) capacitors in the right places gives the best result. Best thing is to try yourself and trust your ears. Still, we want to mention some general characteristics as a rough guideline (of course these are our personal, biased, subjective experiences). These characters apply for capacitors used either in the signal path or in the power supply (for digital different rules apply, but there are simularities as well). Lower voltage versions of a capacitor can offer more refinement (it*s faster, gives more presence towards the mid-highs).
The SILMIC II is best for reproducing different timbres, natural colors and warmth in a recording. It offers most presence in the low-mid range with lots of texture (tangible). Bass is round and warm, the mid and highrange are very refined, *silky*, quiet, but with lots of openess (more open than CERAFINE, less open than Black Gate FK).
The CERAFINE is also very good for reproducing different timbres, natural colors, but has a more direct sound than SILMIC (less direct than Black Gate FK). Bass is round and warm, the midrange has most presence and the high range is lively.
The Black Gate FK has the most open and clean sound, with the main presence in the high range. It sounds thinner, offers somewhat less texture and timbre. It offers most pulse, attack in both the low, mid and high ranges.
Андрей
alex74, согласен.
Добавлю еще о неполярных BG NX - они теплее FK, их звучание уже нелья назвать нейтральным, но вместе с тем они самые "чистые" - по разрешению и передаче тембра не сильно уступают хорошей пленке.
господа вопрос кто то использовал
Dayton Precision Audio Capacitor с партекспреса?
1% Metallized Polypropylene Capacitors
# 250 VDC, high current capacity
# Tightest capacitor tolerance available:+/-1%!
# Extra-thick tinned copper leads
с такими кто-нить имел дело?
http://www.chip-dip.ru/product0/368863338.aspx
пригодны они в проходе или как шунтирующие?
Elms, Если с англ. проблем нет, то вот:
Если вкратце - X2 имеют меньший запас чем X1, но даже того запаса, что есть у X2 хватит для любых аудио-примененийClass X is for applications where failure could not lead to electric shock (hot to neutral). Class X1 capacitors are intended to operate safely even in the presence of spikes on the mains supply of up to 4 kV (installation category 3 or overvoltage category 3 according to IEC60664), which are normally industrial supplies, but some standards call up class X1 capacitors if they are connected directly to the mains supply upstream of the equipment fuse, irrespective of the type of mains supply. Class X2 capacitors are intended to operate safely even in the presence of spikes on the mains supply of up to 2.5 kV (installation category 2 or overvoltage category 2 according to IEC60060), which are normally residential, commercial and light industrial supplies. X capacitors can be found from 0.001 uF to at least 10 uF and are only made in film.
Class Y capacitors are for applications where failure could lead to electric shock if the ground connection were lost. This includes hot/neutral to ground, and antenna isolation capacitors. Because Y capacitors shunt current to ground, leakage-current limitations limit their size to a maximum of about 4700 pF in many commercial and industrial applications (but refer to the relevant standard for definite information) and about 470 pF in medical applications.Cappic Larger ones are available however. Y caps are available from 1000 pF to 0.1 uF and are made in both film and ceramic.
Because most applications require one X and two Y capacitors, multi-capacitor devices are available. Also available are a variety of metal or plastic housing styles, mounting options (pc mount, pigtail) and 4-wire connections. At least one manufacturer (WIMA) has X2 and Y2 capacitors in SMD, with more expected to follow. Line-filter capacitors are most often boxed and potted in epoxy. The box is usually polybutylene terephalate (PBT) for itґs superior flameability characteristics. This gives better moisture protection than an epoxy dip, or the common "wrap and fill" construction. Line-filter capacitors are also used as components in complete filter modules that include inductors and a bleeder resistor. Multi-capacitor modules can even use mixed dielectrics, such as a 3-phase module where the X capacitors are polyester, and the Ys are polypropylene.
Classes X1, X2, and Y were originally defined by the IEC in IEC 60384-14. CENELEC has adopted EN 132400 (technically equivalent to, but structurally different from IEC 384-14 2nd edition), which now defines seven classes of line-filter capacitors. Class X1 capacitors are impulse tested to 4 kV (higher for capacitors over 1.0 uF). Class X2 capacitors are impulse tested to 2.5 kV (higher for capacitors over 1.0 uF). Class Y1 capacitors are impulse tested to 8 kV, and Class Y2 are impulse tested to 5 kV. Classes X3, Y3, and Y4 are for lower-voltage capacitors, none of which are presently called up in safety standards. Other impulse tests also apply. These include a 1000 hour endurance test during which the capacitor is subjected to a continuous overvoltage condition, plus periodic 1000 VAC spikes, and a flammability test during which the capacitor is hit with a series of transients while under rated voltage. Capacitors conforming to IEC60384-14 normally also conform to EN132400, and vice versa, and should be accepted in all European countries.![]()
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