Radio (33)

Radio related stuff, mostly commercial

LA2YUA

The 3021N RF Section/1st Converter (Part 7)

The RF Section or 1st Converter consists of the pre-amplifier, first mixer, and first IF filter in the receiver signal chain. This is typically the most important part of the radio since it determines the sensitivity and selectivity of the radio.

This card was finished in late 2022, at the time of initial publication it has not been integrated yet.

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LA2YUA

The 3021N Demodulator Card (Part 5)

This is part of a series covering the 3021N communications receiver. This part covers the DSP, and was the third part of the receiver that I replaced with a modern expansion, but this update was also more closely paired with the Synthesizer and Power supply replacement. The demodulator card was finished in the middle of 2020.

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LA2YUA

ITT Mackay Marine 3021N Details (Part 2)

This is part two of a series covering my extensively modified ITT Mackay Marine 3021N communications receiver.

This article covers various details on the chassis and the signal path. More details of the various cards are given in later articles covering their replacements. The work covered in this section took place between 2017 and 2021.

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LA2YUA

ITT Mackay Marine 3021N Receiver (Part 1)

The ITT Mackay Marine 3021N is a mid 70's communications receiver, designed for merchant marine and military use. I've basically built it again using modern electronics, which will be covered in detail in this series.

This is part 1, covering the basic overview of the receiver and its role in the original marine communications system. I acquired the 3021N some time the middle 2010's, and started serious work on it in 2018.

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