(Dr Mango) This is actually a compilation of 3 chunks of Peel that straddles the sides of a TDK cassette, interspersed with contemporary chart hits and what sounds like the typical output of Radio 2. I don't have a scanner, but when the light's better tomorrow I might take a photo of the tape listing so you can see what a jumble it is. The Peel content may not even be from the same show, but I suspect they're not very far from each other in origin.
(Dr Mango) Unfortunately, I don't have the broadcast date of this show. The contents of the tape didn't give me much to go on. The biggest clue is that Peel plays a New Order session track, "Dreams Never End". Although he doesn't announce it as such, I've checked and it's definitely the Peel session version. According to Ken's book, the debut New Order session from which the track is taken was broadcast on the following dates: 16.02.81 / 05.03.81 / 16.04.81 / 14.05.81 (and possibly in Dec 81 for the 'best of' yearly roundup). This is definitely not from the first date, as this show has been shared out on here recently. Having looked into the release dates for some of the other tracks on the tape, both Peel and non-Peel, I'm of the opinion that this is either April or May 1981. Perhaps the full shows of these are lurking in the box of 400, so we can confirm this in due course. The sound quality is very good. I suspect it's FM mono.
(weatherman22) This is not the show from 14th May 1981, as the introduction and previous track are different.
16 April 1981 seems to be the most likely date of broadcast of at least part of this recording.
More on the background to this tape at Peel Newsgroup message #7243 (2008-08-04)