2SC1307 DATASHEET PDF

2SC1307 DATASHEET PDF

2SC Datasheet PDF Download – NPN SILICON FPITAXAIL TRANSISTOR, 2SC data sheet. Description, NPN Silicon Fpitaxail Transistor. Company, ETC. Datasheet, Download 2SC datasheet. Cross ref. Similar parts: ECG23, 2SC, ECG 2SC は高周波高出力段用に設計されており, 27MHz帯の CB および 50MHz. * C – 7 BRISLIT. GEOT DAMEMO,. 短絡に対する耐破壊強度が大です。.

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Nowadays one way to get the components we need as homebrewing radioamateurs is buying them via ebay or another online marketplace. There are millions of vendors to supply you with whatever electronic part you need. Most of them do honest business but some are black sheep that sell counterfeits of mainly semiconductors.

This generates considerable profits because there are lots of formerly widely-used semiconductors that are rare today and thus not easy to get.

So fakers will make their profit dataasheet selling counterfeits of these parts. I had two cases of faked semiconductors the recent year.

So, here is my experience….

2SC Datasheet ETC pdf data sheet FREE from

Old mid-power CB transistors in TO style are not easy to get. The price for 6 pieces was abt. Some months later I needed to replace the final amp transistor of one of my rigs and wanted to give one my recently purchased 2SC the debut. After having datzsheet up the rig and having switched it to transmit, I found that there was no rf power except from some 50 Milliwatts instead of 5 Watts. Next step was to check the hFE of the transistor after having pulled it out of the rig again.

2sc130 really had been deceived. For further buyings of RF power transistors. Into the mounting place of the original final amplifier transistor I put in a 3 lead socket to take a TO transistor. Each time I get a new package of RF power transistors today, the first step is to check them out in the former CB rig if they daatasheet able to deliver the desired output power.

2SC1301 Datasheet, Equivalent, Cross Reference Search

That, in general, is not a big problem at all, if you know how these devices look like. Guess what the fake is? The fake is on the right. What to keep an eye on: Also the font is different. So is the printing. Fakes are usually labelled using thin grey and weak colors. Sometimes the painting can be wiped off just with your fingers! The upper part where the device is mounted to the heatsink does not look the same. The fake part has straight edges whereas the genuine one has a slightly widened space around the mounting hole looking like a double nose.

When testing them I realized that the regulator after some minutes that it had delivered about milliamps got a short circuit between input an output. I was lucky that the power supply I had built for my QRP rigs was still under test otherwise it might have damaged the rig dataaheet, because there were 20 Volts on the leads. Fakes like these are also easy to recognize. Next get an image of an satasheet LM on the web.

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But avoid those Cinese websites were you can find the next bunch of fakes. Go to a US or European based seller. There you can find how this regulator should look like. Next datasgeet the price. Got an idea why? If you want to avoid beeing cheated by ruthless fakers when buying components via an online marketplace, test the devices that you get instantly.

If they are counterfeits, ask Paypal if you used this for payment for a refund. If you live in the European Union or another place in the world where there is a consumer-friendly legislation, get information what the law can do for you!

And kick the a…. This unit was destroyed because by a momentary laps of datahseet. I put 12 V DC to it with wrong polarity. OK, I could have bought one.

Money is not dataasheet big problem. But, as a passionate homebrewer, I thought to myself: Datashdet decision was made in summer Now, in late autoumn, this rig s nearly completely finished.

dtaasheet

Building a multi band rig is, as you might conceive, much more complicated than setting up a monobander. So, first I went through literature to avoid fulminant project failure which is more probable when making serious mistakes that can easily be avoided by careful planning.

Boy, today, SDR is the standard! My simple answer then is: To learn more about multi band QRP transceivers I also browsed the web for similar projects. There are some, but often there is no full cicuitry given.

Here are two sites that might be interesting: So, after some days of conceiving, I finally had the basic concept in mind. Sorry, not on the agenda. Based on these prerequisites, here are the main ideas for this radio:. To avoid any fuss in recevier and ssb generation design I have again picked up the single-conversion principle that has successfully been applied in my former transceivers which uses only one interfrequency IF.

Birdies are a particular problem when you use DDS frequency generation. Every DDS produces spurii that can be received with more or less intense signal strength in your own receiver. So I was not keen on having more 2dc1307 the inevitable number of self-reception signals by adding a second interfrequency. I love to build rigs that are compact and neat. To make this fairly complex radio not too large, I found that sandwich design would be the best way to save space and make the transceiver friendly for building and service.

All boards are connected from the laterals by a homemade plug system so that the single Verobaords can be removed and reinstalled datxsheet and from the assembly quickly.

2SC Transistors – 3 in stock to buy, photo, pdf datasheet, rfq, obsolete

In the middle of the sandwich you can recognize the switching unit from where the plugs are lead to the receiver and transmitter board. The idea behind this on one hand makes the transceiver very compact. On the other hand it is very service friendly. It takes only 1 or 2 minutes for example getting the transmitter board out for changing a component.

Remounting the board takes some seconds more. But there is no need to disconnect and reconnect an endless number of cables each time you perform a modification. All lines are connected by the side-plugs. One shortcoming should be mentioned: When I built the rig there was a little bit more effort concerning wiring.

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In this transceiver the interfrequency IF is 10 MHz which is based on the fact that respective crystals can cheaply be purchased in larger quantities to build appropriate ladder filters with. I bought about 50 pieces datawheet around 10 Euros. But other crystal frequencies are also possible. For example computer crystals of 9, kHz, standard 9, kHz xtals 2sc13077 others in the same frequency region can be used.

Taking your IF between 8 and 12 MHz might be the best choice in my opinion. Before choosing the final IF and purchasing crytals or ready-made filters it is highly recommended to do some basic calculations to ensure that none of the harmonics either of the VFO or the LO falls into the desired receiving band going together with a certain set of frequencies generated by the two oscillators.

A spreadsheet software is extremely useful for this purpose, because you can change the IF quickly and see at first glance what you will get out when the DDS is about datasheef generate the needed frequency to bring you to the desired band. Also keep harmonics in mind!

And also keep in 2wc1307 that the image frequency on every band should not fall into shortwave broadcast bands e. They are more or less crap. It worked from the start. This one, as you might gues, worked best. Here is the description of this optimized DDS vfo. Read the article here! For a long time I have owned some colored LCD cellphone displays from a dive computer project that I had completed some years before. These boards are equipped with an ATMega micorocontroller which datxsheet capable to deliver enough capacity and calculation power even for extended software.

So why not using this surplus material? But it things were more complicated when you wanted to cover the other ham bands with only one VFO. Lots of birdies included, sometimes at least. The AD is capable of being clocked with MHz maximum rate. Due to physical reasons Nyquist frequency the highest frequency you can get out of such a DDS is about one third of the clock oscillator frequency what in the first case means about 40 MHz. In my rig I achieved to stay very much below the margin of 40 MHz because output voltage due to the frequency calaculation you can see underneath.

Signal quality of the DDS decreases significantly the closer you get to its maximum frequency. Among other reasons this is due to the fact that a low-pass filter is switched to the output of the DDS. I recommend to stay at least 5 to 10 times lower than Nyquist freqeuncy if possible.

For the two lower bands 80 and 40 meters the operating frequency is calculated by the following scheme:. For the upper three bands 20, 15 and 10 meters another equation is used:.