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自制Q表和产品Q表
早前为了测试，用500型万用表外壳组成一个附件配合信号发生器测试电感，以后买了一台QBG-3D.
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那台自制的Q表，真精致。作为相对比较而言，用自制作 的Q表，对绕制的线圈进行对比测量，来定性判断Q值，应该已能满足制作需要。
自制的“500型Q表”不错。
胶木板怎么开孔的，好像很容易碎
本帖最后由 JHXC 于
18:22 编辑
求知无足 发表于
那台自制的Q表，真精致。作为相对比较而言，用自制作 的Q表，对绕制的线圈进行对比测量，来定性判断Q值，应 ...
自制的Q表附加器十几年了，今天拿出来与产品比对了一下，居然相差不大啦！
自制的由频谱仪跟踪源提供26.856兆周的信号，产品按照习惯信号频率为25.200兆周，同一个电感测试的结果大致一样，大概都在0.4uH左右。 实际制作时，你只要弄准可调电容的刻度、信号的频率，电感则是计算出来再绘制的刻度。
自制由于无法获得高Q值的可调电容，加上工艺粗糙，电容的容量难以满足与产品一样都是500PF，再加上电容的残余电感太大，总会有许多不满意，不过，业余条件下，能够测试出电感值，而且能够比较Q值，会给其他制作带来不少方便的。
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嗯。十几年前能做出这个水平，不简单。
真是不简单，好厉害
水平很高！
这个不大懂，但看过多次楼主的帖子，感到是一个专业人士，赞！
请问楼主：主刻度盘应该处应该是空气可变电容吧？没看到旋钮它怎么调呢？还有右边的旋钮好像也是可调电容吧，这个做什么用呢？我也想做简易q表，想参考一下
看来老产品还是比较靠谱，现在的山货真是
中国有二句成语一句是“登峰造极”，另一句是”异想天开”。我看用在这里且到好处。
请问老哥的Q表有图纸或者文字资料吗？
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本帖最后由 w6955 于
18:06 编辑
wuzhiyi168 发表于
这个图纸简单转化一下就成为商品了，此群的人都不知是哪里来的，应该不是孙悟空就是神仙变的。
中国有 ...
都是街边小店吃面条的主，一碗面、一壶酒、一个Q表。要是楼主的图清楚点也可以过过瘾。
Powered byFrom Wikipedia, the free encyclopedia
Writing cursive forms of Q
Q ( cue ) is the 17th
and the . In nearly all languages using the
it is a , not a .
Egyptian hieroglyph
Phoenician
sound value of
was /q/ (), and the form of the letter could have been based on the eye of a needle, a knot, or even a monkey with its tail hanging down. /q/ is a sound common to Semitic languages, but not found in many European languages. Some have even suggested that the form of the letter Q is even more ancient: it could have originated from .
(?) probably came to represent several
, among them /k?/ and /k??/. As a result of later sound shifts, these sounds in Greek changed to /p/ and /p?/ respectively. Therefore, qoppa was transformed into two letters: qoppa, which
the number 90, and
(Φ), which stood for the aspirated sound /p?/ that came to be pronounced /f/ in Modern Greek.
used Q in conjunction with V to represent /k?/, and this usage was copied by the Romans with the rest of their alphabet. In the earliest
inscriptions, the letters C, K and Q were all used to represent the two sounds /k/ and /ɡ/, which were not differentiated in writing. Of these, Q was used before a rounded vowel (e.g. ?EQO? 'ego'), K before /a/, and C elsewhere. Later, the use of C (and its variant G) replaced most usages of K and Q: Q survived only to represent /k/ when immediately followed by a /w/ sound.
The five most common typographic presentations of the capital letter Q.
A long-tailed Q as drawn by French typographer
in his 1529 book Champfleury
The printed long-tailed Q was inspired by ancient : this long-tailed Q, used here in the Latin word "", was carved into
A short trilingual text showing the proper use of the long- and short-tailed Q. The short-tailed Q is only used when the word is s the long-tailed Q is even used in all-capitals text.:77
Depending on the
the letter Q, the letter's
may either
as in , meet the bowl as in , or lie completely outside the bowl as in . In writing , bisecting tails are fastest to write, as they require less precision. All three styles are considered equally valid, with most serif typefaces having a Q with a tail that meets the circle, while sans-serif typefaces are more equally split between those with bisecting tails and those without. Typefaces with a disconnected Q tail, while uncommon, have existed since at least 1529. A common method among typographers to create the shape of the Q is by simply adding a tail to the letter O.
fonts, such as , contained two capital Qs: one with a short tail to be used in short words, and another with a long tail to be used in long words. Some early
included up to 3 different Qs: a short-tailed Q, a long-tailed Q, and a long-tailed Q-u . This print tradition was alive and well until the 19th century, when long-tailed Qs fell out of favor: even recreations of classic typefaces such as
began being distributed with only short Q tails. Not a fan of long-tailed Qs, American typographer
celebrated their demise in his 1922 book Printing Types, claiming that Renaissance printers made their Q tails longer and longer simply to "outdo each other".
words, which are much more likely than English words to contain "Q" as their first letter, have also been cited as the reason for their existence. The long-tailed Q had fallen completely out of use with the advent of early , as many early digital fonts could not choose different glyphs based on the word that the glyph was in, but it has seen something of a comeback with the advent of
fonts and , both of which can automatically typeset the long-tailed Q when it is called for and the short-tailed Q when not.
Owing to the allowable variation in the Q, the letter is a very distinctive f like the , the Q is cited as a letter that gives typographers a chance to express themselves.
, an automated
service that identifies typefaces by questions about their appearance, asks about the Q tail second if the "sans-serif" option is chosen. Out of Identifont's database, Q tails are divided thus:
Q tail type
Meets bowl
Outside bowl
Inside bowl
Some typographers prefer one "Q" design over another: , famous for the
that bears his name, remarked that most of his typefaces feature a Q tail that meets the bowl and then extends horizontally. Frutiger considered such Qs to make for more "harmonious" and "gentle" typefaces. Some typographers, such as Sophie Elinor Brown, have listed "Q" as being among their favorite letters.
A comparison of the
of ?q? and ?g?
The lowercase "q" is usually seen as a lowercase "o" with a descender (i.e., downward vertical tail) extending from the right side of the bowl, with or without a swash (i.e., flourish), even a reversed lowercase . The "q"'s descender is usually typed without a swash due to the major style difference typically seen between the descenders of the "g" (a loop) and "q" (vertical). When handwritten, or as part of a handwriting font, the descender of the "q" sometimes finishes with a rightward swash to distinguish it from the letter "g".
uses ?q? for the .
?qu? most often denotes the cluster ; however, in borrowings from French, it represents , as in 'plaque'. See the . ?q? is the
in the English language, with a frequency of just 0.1% in words. Only ?z? is used less often. ?q? is the 24th letter in relative frequency as the first letter of an English word.
In most European languages written in the Latin script, such as in
and , ?q? appears almost exclusively in the digraph ?qu?. In , ,
and , ?qu? represents /k/ or /kw/; in , it represents /k/. ?qu? replaces ?? for /k/ before front vowels ?i? and ?e?, since in those languages ?c? represents a fricative or affricate before front vowels. In
?qu? represents [kw] (where [w] is the
allophone of /u/).
It is not considered to be part of the ,
(), , , , , , , , , , , or
alphabets.
?q? has a wide variety of other pronunciations in some European languages and in non-European languages that have adopted the Latin alphabet.
Phonetic values of Q
Occurrence
IPA, , , , , Kurdish (Latin Kurmanji, Yekgirtú), Kazakh Latin, , , , , ,
phonemic /q/ sometimes as [?]: , Ket Latin (normally with affrication [qχ])
affricated voiceless uvular stop
Ket Latin (allophone of [q])
(allophone of [q]), Ket Latin (allophone of [q] after [?])
several European languages, often only in digraph ?qu?, which often is pronounced [kw]. In some case the whole digraph is pronounced [k].
labialized
transliteration of ,
transliteration of the Cyrillic
Southern Vietnamese dialects digraph qu is /w/
Berber Latin alphabet: q, q? or ?
The capital letter Q is used as the currency sign for the .
Q is sometimes used to represent the number 500,000.
The capital letter Q is used to designate a
films and film novelizations.
letter , from which the following symbols originally derive
Q, which is the ancestor of modern Latin Q
? ?&#160;:
?&#160;: rotated capital Q, a
, ? ?&#160;: Various forms of Q were used for medieval
Unicode name
LATIN CAPITAL LETTER Q
&#160; &#160; LATIN SMALL LETTER Q
1 Also for encodings based on ASCII, including the DOS, Windows, ISO-8859 and Macintosh families of encodings.
hypothetical source used by the Matthew and Luke gospels
"Q" Oxford English Dictionary, 2nd edition (1989); Merriam-Webster's Third New International Dictionary of the English Language, Unabridged (1993); "que," op. cit.
Travers Wood, Henry Craven Ord Lanchester, A Hebrew Grammar, 1913, p. 7. A. B. Davidson, Hebrew Primer and Grammar, 2000, . The meaning is doubtful. "Eye of a needle" has been suggested, and also "knot" Harvard Studies in Classical Philology vol. 45.
Isaac Taylor, History of the Alphabet: Semitic Alphabets, Part 1, 2003: "The old explanation, which has again been revived by Halévy, is that it denotes an 'ape,' the character Q being taken to represent an ape with its tail hanging down. It may also be referred to a Talmudic root which would signify an 'aperture' of some kind, as the 'eye of a needle,' ... Lenormant adopts the more usual explanation that the word means a 'knot'.
Haley, Allan. . Fonts.com. Monotype Imaging Corporation.
Samuel, Stehman Haldeman (1851). . J.B. Lippincott. p.&#160;56.
Hamilton, Gordon James (2006). . Catholic Biblical Association of America.
Woodard, Roger G. (). . p.&#160;303.
Noyer, Rolf.
(PDF). University of Pennsylvania Department of Linguistics.
Boeree, C. George. . Shippensburg University.
Arvaniti, Amalia (1999).
(PDF). Journal of the International Phonetic Association. 2 (29): 167–172. :. Archived from the original on .
Miller, D. Gary (). . John Benjamins Publishing. pp.&#160;54–56. &#160;.
Bispham, Edward (). . Edinburgh University Press. p.&#160;482. &#160;.
Sihler, Andrew L. (1995),
(illustrated ed.), New York: Oxford University Press, p.&#160;21, &#160;
Updike, Daniel Berkeley (1922). . Harvard University Press. &#160; – via Internet Archive.
Ambrose, G Harris, Paul (). . A&C Black. p.&#160;24. &#160;. ...the bisecting tail of the Helvetica 'Q'.
Willen, B Strals, Nolen (). . Princeton Architectural Press. p.&#160;110. &#160;. The bowl of the Q is typically similar to the bowl of the O, although not always identical. The style and design of the Q's tail is often a distinctive feature of a typeface.
Vervliet, Hendrik D. L. (). . BRILL. pp.&#160;58 (a) 54 (b). &#160;.
Rabinowitz, Tova (). . Cengage Learning. p.&#160;264. &#160;.
Osterer, H Stamm, Philipp (). . Walter de Gruyter. pp.&#160;97 (a) 183 (b) 219 (c). &#160;.
Loxley, Simon (). . I.B.Tauris. &#160;. The uppercase roman Q...has a very long tail, but this has been modified and reduced on versions produced in the following centuries.
Fischer, Ulrike (). . TeX Stack Exchange.
. Typography.com. Hoefler & Co.
Bosler, Denise (). . F+W Media, Inc. p.&#160;31. &#160;. Letters that contain truly individual parts [are] S, ... Q...
. Identifont.
. Identifont. To get the numbers in the table, click Question 1 (serif or sans-serif?) or Question 2 (Q shape) and change the value. They appear under X possible fonts.
Heller, Stephen (). . WIRED.
Phillips, Nicole Arnett (). . Typograph.Her.
Gordon, Arthur E. (1983). . University of California Press. p.&#160;44. &#160; 2015.
Everson, M Baker, P Emiliano, Antó Grammel, F Haugen, Odd E Luft, D Pedro, S Schumacher, G St?tzner, Andreas ().
See references at
Media related to
at Wikimedia Commons
The dictionary definition of
at Wiktionary
The dictionary definition of
at Wiktionary
Letter Q with
: Hidden categories:q。。q是怎么发送这种消息的？点击联系客服会跳转一个人的q。。q资料。客服左边空白处点击会跳转一个_百度知道
q。。q是怎么发送这种消息的？点击联系客服会跳转一个人的q。。q资料。客服左边空白处点击会跳转一个
。。q资料。q是怎么发送这种消息的？点击联系客服会跳转一个人的q。
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