Koala Bear Paul, Rainer Lichte, in his 1985 tome ' Radio Receiver-Chance or
Choice', said the Sony 2001's arrival four years earlier "caused a stir in the
SWL and DX community worldwide. What was previously only possible with a few
exotic and expensive receivers suddenly became a standard for portable radios:
direct access tuning by keyboard entry". Lichte also discovered that the 2001
"delivers quite useful swl performance ... The ICF 2001 is clearly tailored to
accomodate and satisfy the critical SWL". Portable useage has a caveat, though,
as "a fresh set of alkaline cells will be exhausted after only five to seven
hours". Sangean's ATS-801A was physically modeled after the 2001.