Sep 17, 2023 · Choose 2 Prizes from a Set of 6 Prizes. You have won first place in a contest and are allowed to choose 2 prizes from a table that has 6 prizes numbered 1 through 6. How many different combinations of 2 prizes could you possibly choose? In this example, we are taking a subset of 2 prizes (r) from a larger set of 6 prizes (n).

Tube 6C6 or Röhre 6C6 ID3538, Vacuum Pentode, 6-Pin-Base U6A, old, USA and Universal shown. Radio tubes are valves.

Oct 22, 2006 · 在rca手册上，有一款示范电路就是用6c6管来推2a3单端，因此我觉得就用6c6来做不会有太大的问题，6c6也等同于6j7等等一些管子，在具体的电路结构与参数设置上，可以借鉴这些管的应用状态，前些年，论坛上也有位朋友（西贝春江）实作过6c6-2a3单端，据说效果不 ...

The 6C6 is a general purpose amplifier valve but the close similarities with the 6J7 indicate a good linear characteristic and good suitability for early stage audio amplification such as the output of a photocell reading the soundtrack on film. The valve is a true pentode as can be seen from the three wire grids.

Oct 11, 2017 · 该模块的工作频率是340KHz，这个还是要讲究一下的，要离音频频率远一些，才不至于引起高频噪音甚至自激。 升压模块号称70W，我有7W就够了，有点杀鸡用牛刀的意思， …

Oct 20, 2006 · 只听人声、民谣的话，6c6可以推300b，效果还不错。五极管不适合牛推

Mar 11, 2012 · 国产6C6D灯塔管，几乎在任何公开的电子管手册中都找不到它的户口，有些朋友说它的特性近似于美国的2C40，苦于找不到任何资料而只能用美国的凑合用。 为了“打破”美国的“技术垄断” 我利用昨天和今天两天将近20个小时的时间，在极其简陋的环境中，利用手头机器极其的工具，克服种种困难，自己测绘了国产6C6D灯塔管的特性曲线，实际看此管和美国的2C40还是有很大差距的 要说明的是，我测绘中使用了一块国产DT930F数字表测试屏极电压，用一块自己 …

Mar 3, 2025 · 从一种高空探空仪电路板上拆到了两只型号为6c6的袖珍电子管。 看着挺秀气的，不知道用于音频电路出声怎么样，有用过的坛友吗？ 出来说说。

6C6 is the type of nCr or nCk problem. The below 6 choose 6 work with steps help users to understand the combinations nCk formula, input parameters and how to find how many possible combinations/events occur while drawing 6 elements at a time from 6 distinct elements without considering the order of elements.

Jan 3, 2019 · These are new OPTs (Electra-Print low-IMD 3K:8R, 100mA, 30 watt) and NOS coupling caps, so they'll need break in time, but it already sounds very good. Speakers are self-made Planet 10 trapezoidal Onkens for Mark Audio Alpair 10P. I love the smoked glass Tung-Sol 6C6 (also NOS) and the silvery caps I found at the store.