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RF transformer. Primary / secondary: 0.2 µH. 0.667" diameter, 0.935" high. NSN: 5950-818-3688.

In many ways, the Colpitts oscillator is the exact opposite of the Hartley Oscillator we looked at in the previous tutorial. Just like the Hartley oscillator, the tuned tank circuit consists of an LC resonance sub-circuit connected between the collector and the base of a single stage transistor amplifier producing a sinusoidal output waveform.

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It uses a 455KHz IF transformer salvaged of an older radio and it has only four components. Here is the Schematix data for the BFO. cq455khz crtrans csformer dpit dqea drea dsea dtii elit emea enea eoea epve eqei erii esit etve fk22pf flse fn0v7 fots fpve fqbi frse fssv ftae glie gmeh gnea goei gpve gqen grti gsis gtve hlae hm1meg hoae hpis ...
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Jul 20, 2011 · Electrical transformer iron core serves to simplify the way flux, magnetic posed by electric current through the coil. Made of thin steel plates are insulated to reduce heat (as the iron losses) generated by Eddy Current. 2. Transformer coil Transformer coil is a few winding insulated wire forming a coil or coils.

Oct 24, 2013 · I have several IF transformers, all 455KHz centre freq. How would I go about testing these with a sig gen which has a 50 Ohm output, and an Oscilloscope. I would like to be able to get them "near" to the final tuning, before I put them in my receiver.

Sep 28, 2007 · RF Oscillator with Three Parts The Simplest Oscillator Ever. If anyone can successfully disprove this claim, I'll gladly retract it (Posted September 28, 2007) if transformer, Aug 02, 2016 · Transformer polarity is fundamental to grasping how transformers function and how they’re utilized. Understanding polarity is essential to properly paralleling single-phase transformers and connecting instrument transformers (current and potential) to metering devices and protective relays. These are 455KHz valve type IF transformers, available from Vintage Electronic Supply company, Tempe Arizona. See my index page for component supliers. If you wish to make them yourself then wind 335 turns of 32 SWG wire for both the primary and secondary, the two coils are spaced about 6mm apart.

For typical transistor radios the IF frequency is nominally 455KHz.The IF amplifier is usually composed of two transistors and three transformers in a typical AM transistor radio. Some radios such as the Pacemaker only have two IF transformers and one IF transistor. Most of a transistor radio’s signal gain and selectivity is in the IF amplifier.
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2nd vote for mouser. 42IF100-RC Red Oscillator 42IF101-RC 455kHz Yellow 1st IF 42IF102-RC 455kHz White 2nd IF 42IF103-RC 455kHz Black 3rd IF The 42IF100-RC will be listed at mouser as if it was 796kHz IF, but it is really the oscillator coil. These are made by xicon.

For example on 540KHz:- a 10uH inductor and a 8600pF will provide a notch depth of about 25dB with a bandwidth of 750KHz at the -3dB points. Old analogue AM radios are a good source of suitable variable inductors. If you can find one of the metal canned adjustable AM 455KHz IF transformers...

The 42IF100 is a red sub miniature PC mounting intermediate frequency transformer. An "intermediate frequency transformer" is a special purpose transformer used for filtration purposes in radio reception, rather than voltage or current conversion, though a step-up or step down ...

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Ref. No. Description. Mfr.'s Part No. CF101. Ceramic 10.7MJ. 270-010-2. CF102. Ceramic CFW 455HT or Ceramic CFU 455HT This high-end AM-only tuner, very popular during the mid-1970's, has a very large intermediate frequency (455kHz) output level, which needed significant signal attenuation (or "padding"), in order to properly drive the composite baseband input to the AM_ST decoder, without overloading or "swamping" the module's I.F input.

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Find many great new & used options and get the best deals for 455kHz Tuned Transformer Yellow White Black Oscillator Coil Red Radio Transistor at the best online prices at eBay! Free shipping for many products! Order today, ships today. LTM455DU – 455kHz Center AM Ceramic Filter 10kHz 1.5kOhm Cube, 4-PC Pin from ECS Inc.. Pricing and Availability on millions of electronic components from Digi-Key Electronics. The extra added 24 volt supply (transformer, filter, and regulator) takes up very little room and is quite cheap. At this point and with all the circuit’s signal levels adjusted properly, the RF output jack will display a clean sine wave of +10 dBm (2,000 mV P-P) with exceptional flatness of ± 0.1 dB, all the way up to 80 MHz (bands 1-8).

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Audio output transformers are heavily used in a vacuum tube and some (older) transistor base audio power amplifiers, but these days output transformer are quite hard to find and expensive item. For homebrew projects, the best option is to construct those transformers by ourselves and this script helps to calculate winding parameters for those ...

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Another Lindsay book, the Thordarson Transformer Manual (ISBN 1-55918-243-1) is still in print and very useful in identifying and using late 1930s Thordarson power transformers, modulation transformers, and filter chokes. Lindsay has a lot of books covering tube tech, some "vintage," some brand new by the old timers who still remember this ...

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Surplus Transformers 450/455 KHz If Filters We carry a very wide range of filters for radio use generally as a second IF filter LTM455EU CFUM455E MURATA EQUIV FILTER 15 KHZ TOTAL BW 455KHZ 4 LEG Xicon 455KHz IF Transformer, suitable for IF stages or as a FM demodulator co.. $2.95 Ex Tax: $2.68. Add to Cart. CS10-1012-3.5. Xicon 3.5Turn 0.097uH 1012 series ...

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2nd vote for mouser. 42IF100-RC Red Oscillator 42IF101-RC 455kHz Yellow 1st IF 42IF102-RC 455kHz White 2nd IF 42IF103-RC 455kHz Black 3rd IF The 42IF100-RC will be listed at mouser as if it was 796kHz IF, but it is really the oscillator coil. These are made by xicon. transformer not shown) This diagram shows a very elaborate LCS system. But you don’t need to start big! The only required component is the LCS Power Supply and DB9 cable, just one per layout. Your system could start out as simple as a Legacy base, the LCS Power Supply and DB9 cable and a single LCS module, such as a SensorTrack. Jul 18, 2015 · Please note: the IF coil transformer coil has a "hot" side (top= maximum resonance output) and a "cold" side (earth), so sometimes the connections from the IF transfomer have to be reversed (often ...

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like to find 3x 455kHz 2nd IF transformers (white slug) and a 3rd IF transformer (black slug). I notice others have had difficulty finding them too. None of the usual places has anything at all in this line. I want to build a theremin for a science lecture so the ability to pull the oscillators well off frequency by stray capacitance is essential. I.F. Transformer / 455KHz. Pearce-Simpson p/n: 12A-26 Included are: mounting clip and terminal guide. Made in USA. Removed from retired equipment. $3.99 +S&H: 1 ... Filters – Ceramic Filters are in stock at DigiKey. Order Now! Filters ship same day

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The 455KHz oscillator is tuned to one side or the other of the crystal filter passband and is sufficiently stable to maintain this frequency offset. The capacitor "C" is an integral part of the 455KHz IF transformer used for L1. T1 and T3 are constructed using 1/4" ferrite rings.

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There are usually 4 RF transformers in a AM radio with colors of Red for the LO oscillator, Yellow for the mixer or 1st IF, White for the 2nd IF, and... They did note that the output impedance of the mixer stage in the 540-1640KHz band generally exceeded 35k at 470KHz, but they used the 28k:800...

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Back Automation and Control. Digi-Key carries a broad line of Industrial Automation, Control and Safety products from some of the most recognized and trusted industry suppliers. I replaced both IF transformers with known good 455kHz units that were virtually identical in appearance to the originals. I built a 32-volt supply with items from my junk box that would deliver 32 volts at 1.5 amps. I plugged in the radio and it worked immediately (after I reversed the plug so that B+ was positive!) mVrnrJs KHz KHz dB dB. Image Frequency Interference. IM. I. fr = 1400KHz, WBAGC : "OFF". - 455. Qo Turns.2nd vote for mouser. 42IF100-RC Red Oscillator 42IF101-RC 455kHz Yellow 1st IF 42IF102-RC 455kHz White 2nd IF 42IF103-RC 455kHz Black 3rd IF The 42IF100-RC will be listed at mouser as if it was 796kHz IF, but it is really the oscillator coil. These are made by xicon.

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transformer not shown) This diagram shows a very elaborate LCS system. But you don’t need to start big! The only required component is the LCS Power Supply and DB9 cable, just one per layout. Your system could start out as simple as a Legacy base, the LCS Power Supply and DB9 cable and a single LCS module, such as a SensorTrack. Vintage Vacuum Tube Radio Transceiver I.F. Transformer / 455KHz. Pearce-Simpson p/n: 12A-26 Included are: mounting clip and terminal guide. SEMITRON PC44 455 kC ( 455 kHz ) I.F. Transformer. No. L-1 Standard S-tran.

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Feb 10, 2010 · An IF transformer is, essentially, a bandpass filter. Receivers use an intermediate frequency because it is difficult to make a tunable filter which has a good frequency characteristic. All incoming signals are frequency shifted (see the earlier comments about Mixers) to the chosen Intermediate Frequency so that this IF filter can shape the ... A generator between 450 KHz and 480 KHz drives (via a small capacitor from (say) 50-100 pF an IF can on the primary winding from the can (a 455 KHz filter...

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A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carrier frequency.

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A 50 Hz power transformer connected to 60 Hz will just run cooler. A 60 Hz power transformer connected to 50 Hz is in risk of magnetic saturation and thus overheating. From your question, we can't tell if you're trying to use a 455KHz transformer at 100 MHz.

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This is a Brand New Lot of 4 (Four) CEC IF Transformer Coil Tunable Inductor 455KHz Center Frequency Part Number: A90105044. We’re e-liquidators. We specialize in Military, Government, Industrial and Business liquidation services, disposition and asset recovery management. Home>Resources>455KHZ_IF TRANSFORMER/MIXER. 455KHZ_if transformer/mixer. Tags: None. Open in Editor.

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There might be small deviations from this, but most IF transformers are interchangeable. You should have continuity between the 3 pins on one side, and continuity between the 2 pins on the other side. See also this: Radio Hobby Replacement 455 kHz If Transformers | eBay.455khz IF Transformer (RED). Use the side with 3 pins (left pin and middle pin) ~350uH for 3 Meter Antenna) Insert the crystal oscillator onto the breadboard with the dot positioned at bottom left. Connect the left pin of the coil with the output of the crystal oscillator

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I replaced both IF transformers with known good 455kHz units that were virtually identical in appearance to the originals. I built a 32-volt supply with items from my junk box that would deliver 32 volts at 1.5 amps. I plugged in the radio and it worked immediately (after I reversed the plug so that B+ was positive!) Coil Adjustable 455Khz similar TOKO 7MC-8128Z for Quadrature FM, IF Transformer. For IC Receiver MC3361 MC3362 MC3363 MC13135 MC3359 MC3371 MC3372. Dear customers! If you have ANY questions, PLEASE ASK us. Specifications:

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Dec 16, 2012 · The signal injector I've used to test the IF strip is simply an 800Hz oscillator modulating a 455KHz oscillator based on one of those small yellow 455KHz resonators. It works quite well, although I have no real idea about it's power output. I can easily pick up the harmonics at 900 KHz (and beyond) on the Grundig. Audio amp is a simple LM386 design. In low-cost AM radios, the IF transformer between the mixer and the ceramic filter takes care of removing signals in the spurious response region of the filter (which can be the sum of the RF and local oscillator or the local oscillator itself).

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Here is my attempt to compile a list of the Air Ministry equipment numbers and some notes about what they were. WWII military aircraft equipment is mainly built in a modular fashion, so that power units, aerial connections, control panels etc. could be varied according to the detail of the installation, which itself was given an ARI number. The Drake 2-C has 4 holes in the rear panel of the chassis close to the LC filters, I put an RCA connector in one of these holes and connected this RCA to the point 4 of T8 through a piece of RG174. To isolate the receiver and the laptop I used a 1:2 Mini-Circuit TX 2033 transformer. I inserted the jack into the line-in and run Winradio!

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BGMicro Electronics - Home > Passive Components > Audio / Signal Transformers > Set Of 3 455 kHz IF Transformers 50A01 A02 A03. the 1st, 2nd, and 3rd 455kHz IF cans with data sheets. Back in '81, we originally bought over 800,000 assorted IF cans.Xicon 455KHz IF Transformer, suitable for IF stages or as a FM demodulator coil. The 455kHz coil has no internal capacitor & requires an external 180pF in parallel for resonance. Ratio 22:1, 50k : 500R, 1st IF transformer Yellow.

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Review Demodulator coil quadrature 450 kHz & 455 kHz for FM IF Receiver. VARIABLE COILS Quadrature 7MC-8128Z Toko, 680uH + 180pF 455Khz Q100 The BEST https Coil Adjustable 455Khz similar TOKO 7MC-8128Z for Quadrature FM, IF Transformer.Find many great new & used options and get the best deals for 455kHz Tuned Transformer Yellow White Black Oscillator Coil Red Radio Transistor at the best online prices at eBay! Free shipping for many products!

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May 06, 2016 · Superheterodyne receiver In a typical superheterodyne receiver the incoming radio signal from the antenna is passed through a tunable RF bandpass filter to attenuate some undesired signals, amplified in a radio frequency amplifier, and mixed with ...

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bendix c291787-1 c291787-1 515531 Is Similar To: L217354-1 L217354 Bendix Radio Vintage 120 To 720 Vac 2.0 Ma Power Transformer

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Type: 10EZ Prefix: 10EZ BEC Prefix: 35 Stock correct as of 09/11/20

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I.F. Amplifier - The I.F. transformer primary has 18 turns, the secondary winding has 4 turns. The capacitors across the IFT primaries are 82pF. The input/output transformer has 12 turns, tapped at 3 turns from ground. This transformer is wound on a ferrite core. The MOSFETs are 3SK45's. The diodes in the product detector are 1N34's. Dec 16, 2012 · The signal injector I've used to test the IF strip is simply an 800Hz oscillator modulating a 455KHz oscillator based on one of those small yellow 455KHz resonators. It works quite well, although I have no real idea about it's power output. I can easily pick up the harmonics at 900 KHz (and beyond) on the Grundig. Audio amp is a simple LM386 design. Okay, it is a product detector rather than a IF mixer. Still the project was about understanding how the transistor mixer works, rather than the 455kHz IF mixer. What was surprising for me in the investigation was that the circuit was working in Class B. I initially assumed it would have been operating in Class A. Regards AlanX

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LTM455FW 12kHz wide 455kHz IF ceramic filter replaces ALFYM455F CFWM455F Cables (244) Microphones & accessories (141) Connectors & adapters (80) Antennas & parts (10) Components & modules (33) - Audio transformers (2) - Ceramic filters (18) - DC power modules (0) - RF transformers (0) - Shaft couplers (5) - Wire & cable (1) - Audio amplifiers ... The valve heaters can be wired in series and a 12 volt transformer can then be used. The set draws about 20mA, so a small 10 watt (for safety) 200-0-200 volt transformer can be used with two 1N4007 diodes and a 100u smoothing capacitor. Operation. My first impression using my workshop antenna (5m of wire running up a chimney) was not very ... An added improvement to centering the voice coil and excellent for removing buzz or rattle is to rig up a 110v to 6v transformer with a pot (wire wound) so you can adjust the 6v a/c side to zero, feed this through a 25 ohm 5 watt resistor, to the voice coil of speaker,adjust volume with pot and listen for any buzzing or rattling and adjust ...

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Audio & signal transformers if 455khz 30k-500. Manufacturer: Xicon Using metal can transistor radio IFTs as the tuned elements of a BPF is just such an obvious and neat idea for this band. A pack of four IFTs is available from Jaycar, three cans for the 455kHz IF and one (red) for the oscillator. VK1SV built a 630m filter with two, whereas Steph VK5ZSV went as far as five.The CFU, CFW and SFP families of piezoelectric ceramic filters provide superior electrical and mechanical performance in all types of RF products and applications. Center frequencies of 455kHz or 450 kHz are available, in bandwidths from ±2kHz to ±17.5kHz.

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• On using AC line as an internal shunt regulator mode, it is possible to use low cost application without a transformer (approximately 42mA). 455KHz.

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The table covers 455 Khz IF transformers, 10.7 Mhz IF transformers and standard AM Radio band oscillator coils which are tuned by the 60 pF section of a 60 / 160 pF "plastic" variable capacitor. New in original box Miller 12-C10 455 KHZ miniature IF output transformer *These Miller 12-C10 IF...Connect the 'scope "Y" input to terminal "C" on the fourth IF transformer. Now, start with the 4th IF transformer and inject the sweep generator signal to the grid input of the 3rd IF amplifier tube. Adjust the 4th IF transformer for a symmetrical pattern but be sure that the amplitude of that pattern remains at the same level.

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transformer cans underneath the chassis (diagram and circuit above and photo, right). These rods move one of the IF transformer coils relative to the other in the same IF transformer, thus physically altering the degree of coupling between the transformer primary and secondary circuits. In the S.750, this is claimed to be ‘variable Xicon 455KHz IF Transformer, suitable for IF stages or as a FM demodulator co.. $2.95 Ex Tax: $2.68. Add to Cart. CS10-1012-3.5. Xicon 3.5Turn 0.097uH 1012 series ...

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INSTALLATION INSTRUCTIONS 455 KHz CHANNEL GUARD IF INTERFERENCE FILTER The CHANNEL GUARD filter is a very effective device to Figure 3 shows a typical 455 KHz IF amplifier stage. A metal IF transformer "can" connects to the base of the IF amplifier transistor, either directly...455KHz oscillator using FET & 455KHz IF transformer - The 455-kHz oscillator circuit uses a filed-effect transistor (FET) for Q1. The output signal is taken from the source circuit of Q1. T1 is a 455-kHz IF transformer. __ A 'Multi-Turn' Homemade Variable Tuning Capacitor - A remarkably simple Homebrew device for tuning in your FM stations! The ...

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455khz if transformer white (2nd i.f) if transformer yellow: برای دريافت قيمت تماس حاصل فرمائيد ... IF_scaner with 10.7Mhz and 455khz radio-intermediate-frequency-transformer. electronic valve radio intermediate frequency transformer 97 contributions in the last ...

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