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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Output power in two-tone-test: Components prone for being optimized by this method are: Q6 also does not have that ferrite bead on it either. The transmitter I have to admit, I underestimated the diffculties that I was going to face when constructing a 3 to 30 MHz broadband QRP amplifier with a power output level of datasheeh 10 watts on all the five bands covered.
Here are two sites that might be interesting: Each transistor of the pair now only amplifies one of the half-waves of the duty cycle. IF and AF stages Next 2sc13307 are an IF preamplifier which is connected to a manual gain control potentiometer sited in the front panela ladder filter with about 2.
No intermodulation or other interference by strong broadcasters close to ham bands particularly on 40 meters! By continuing to datasheet this website, you agree to their use.
They are more or less crap. On the other hand I had kept in mind that a broadband design always offers significantly lower overall gain than a monoband amplifier.
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. Measurement results at the completed unit: Due to the fact that my rig needs 3 sections of relay switched circuitry rx front end, band filter past the tx mixer and low pass filter past the exciter I switched the corresponding relays for one band in series.
The board has nearly all the ports of the installed ATMega to be accessed by the developer. To make the amp stable and clean I applied the following techniques:. What to keep an eye on: How to make an amp broadband The main problem with transistor amplifiers mainly those designed for rf purposes is the gain-vs-frequency problem. But, as I said before, all these measures cost a certain amount of gain. I read a lot of stuff in advance, particularly the ARRL library, to get aquainted with the basics of designing linear broadband amplifiers for rf.
This unit was destroyed because by a momentary laps of reason. 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 to generate the needed frequency to bring you to the desired band. First QSOs went very fine on 20 meters where my antenna is tuned to. Mechanical considerations I love to build rigs that are compact and neat.
Most of them do honest business but some are black sheep that sell counterfeits of mainly semiconductors. I bought about 50 pieces for around 10 Euros. The Mixer The amplifier terminates broadband style toroid transformer putting its rf energy into a diode ring mixer which by definition is a balanced mixer circuit.
Again this is to dayasheet the repeated soldering process ruining my Veroboards:. 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. Optimize your rf transformers!
The audio-derived AGC circuit daatasheet the same like in my hand-held transceiver. Even a PWM modul is installed to make the display light controlable by software. Frequency calculations For the two lower bands 80 and 40 meters the darasheet frequency is calculated by the following scheme: Cannot seem to find a directly equivalent datasheet for the 2SC But some experiments were neccessary to optimize the VFO circuit.
Next get an image of an original LM on the web. But other crystal frequencies are also possible. And kick the a….
Every DDS produces spurii that can be received with more or less intense signal strength in your own receiver. All what you have got to do is to connect the various ports of the microcontroller to your application. The design is capable of delivering about 20 watts of rf power but I wanted to run it within a well defined distance from its limits to ensure top signal quality. Check the data sheet for exact data before buying a certain relay model.
But it things were more complicated when you wanted to cover the other ham bands with only one VFO. But, no need to get desperate: The main objectives for the receiver were: Read the article here!
I recommend to stay at least 5 to 10 times lower than Nyquist freqeuncy if possible. If available check the output with a spectrum analyzer! The same is true for the emitters bypasses: Boy, today, SDR is the standard! My first mistake before bypassing correctly was to try to bring monoband concepts to a broadband amplifier. I own a large number of my favourite Amidon toroid cores so that I can produce a variety of test transformers that can be soldered quickly to soldering nails.
Next check the price.
All boards are connected from the laterals by a homemade plug system so that the single Verobaords can be removed and reinstalled into and from the assembly quickly.
When I built the rig there was a little bit more effort concerning wiring. My laziness occasioned the generation of the post here.
OK, I could have bought one.