465 kHz IFTs & MW Oscillator Coil AM Radio Intermediate Frequency Transformers 2

This is one item of IFT or MW Oscillator Coil available as separate items or in packs containing more than one coil.

The IFTs will tune from 450 to 500kHz, taking in all the commonly used intermediate frequencies. The oscillator coil is intended to tune from 990 to 2070 kHz using a 65pF variable capacitor for reception frequencies of 525 to 1605 kHz in transistor superheterodyne receivers. Internal resonant capacitors are present in the IFTs. The centre pin on the IFT primaries is usually connected to +V supply, with the longer tank winding being left open circuit and the shorter winding being connected to the transistor collector. You can identify the tank and collector pins by checking the D.C. resistance readings in the sketch diagram in the pictures, where the longer tank winding has the higher resistance. As is usually the case, the pins are not on a 0.1" pitch. The screening can tabs are 1.6mm wide. The can outer dimensions are 10 x 10 x 12.5mm. These types have some advantages in that the internal construction makes them inherently magnetically screened, and they can be adjusted without a special trimming tool.

Care should be taken during adjustment not to wind the core in too far, as this can crash against the internal core or break the winding connections.

You could use these in a radio project such as that seen at the following link, which you'll need to cut and paste into your browser:

http://www.interestingelectronics.com/old/henrys_interesting_electronics/
mediumwave_radio/mediumwave_radio.htm

More Information:

Coil Type Core Colour

MW OSC Red
IFT1 Yellow
IFT2 White
IFT3 Green

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