Sony AHF 90 Audio Cassette (1981)

The Sony AHF was an excellent normal bias cassette from the renowned hi-fi manufacturer.

At the dawn of the 1980s, there were three normal bias ferric oxide tapes in the Sony range.

The CHF was the basic offering. Light on treble definition, fairly noisy, and low in price – but in its class, still pretty good value.

The next step up was the BHF. This had noticeably better treble response, and whilst noise/hiss wasn’t exactly minimal, it was certainly more under control than with the CHF. The price was typically around 30% higher than that of the CHF.

Stepping up again to the most expensive Sony ferric, you found the technically superior AHF.

1998 TDK SA 90 Audio Cassette

It’s hard now to imagine how life would be without fast PCs and intuitive operating systems. Even though it was made in the Internet era, this tape predates the release of Windows 98 (imagine that). So we’re back in the territory of Windows 95, and a climate in which most consumers were only just learning what USB was. The computers on many people’s desktops still didn’t feature CD burners, and so there was still a big market for blank audio cassettes.

1995 TDK SF 90 Audio Cassette

The TDK SF 90 of 1995 was TDK’s basic Type II tape. I thought these were very good value and used them a lot. They were pretty much interchangeable with the That’s VX60, offering similar characteristics and reliability at the same sort of price. The tinted casing gave the TDK SF 90 a little visual personality.