Index of Technical Information and Modifications for Equipment by Instrument Flight Research (IFR) Corporation Technical Information and Modifications for Equipment by Instrument Flight Research (IFR) Corporation Compiled by Mike Morris WA6ILQ Maintained by I know nothing about this equipment so please don't ask! What happened to IFR??? In 2002 Aeroflex Inc. (a New York-based holding company) bought IFR for about $60 million and folded it into their other holdings as 'Aeroflex Test Solutions.' In late 2014 ATS was bought by Cobham. Note that there is no actual unit called the (whatever model-number)S/A, it's an abbreviation.

The one manual would be for both the S-model and the A-model. The A-model does not have the spectrum analyzer and tracking generator options, the S-model does. And in response to several emails, no, I don't know if an A-model can be field converted into an S-model, or where to get parts, or how to do it. A lot of older IFRs use blue fiberglass circuit boards.

Paul, I obtained an original IFR 1100S manual for $150. Pre Ban Norinco Ak 47 Serial Numbers. I wrote the IFR company about putting it into *. Abitha Death Photos. pdf format since it is copyrite about 1984, but they never. IFR-1000A / 1000S / 1100S. AC/DC voltmeter, AM/FM Mod meters and much more with manual, lid and. IFR Reconditioned Service Monitors.

These boards are VERY fragile. You must do ANY necessary soldering with great care and quickly to avoid overheating the board.

Also, may old IFRs are having power supply problems. If anyone would like to do an article on troubleshooting and repair we'd be happy to put it here. Likewise an article on attenuator repair, oscilloscope tube replacement, or on any other IFR-related topic.