From LabGuys article:
" RECORDING TIME
a. 40 minutes for a 6-1/2 inch reel (750 feet)
b. 90 minutes for an 8 inch reel (1650 feet)
c. 195 minutes (3 hrs 15 min.) for a 6-1/2 inch reel (3600 feet)
d. 300 minutes (5 hrs) for a 12-1/2 inch reel (5540 feet, 1 mile+)"
Item c is incorrect, according to my manual the 3600 ft spool is
10-1/2 inches not
6-1/2inches.
Item d is correct... the reels
are indeed
12-1/2 inches not
11-1/2 as I have stated in the above posts.
jr