I have two of the three models of Pioneer walkmen from 1983 I know of over at Nakdoc's shop and hopefully both can be repaired...
PK-5AW (YL yellow) all weather player with Dolby
PK-R7AW (RD red) recorder with Dolby
Both with AMS and autoreverse.
There is also a base model PK-3 in silver, red, blue and yellow.
I have many brands and varieties of cassettes. I like most of them all, even some stuff that turned out bad (it was from TH's Freddy1, it helps me remember him) and especially Phoenix Audio Tapes. Many of you helped me get started after years without new cassettes and I still send them as gifts and sell a few cheap to help others start.
On the subject of Type I cassettes, this Fuji FR-I Super is an excellent tape. I was surprised how much signal it could take without compromising sound quality. This one could handle a peak recording input level of up to +3 dB.