Total posts : 45366
Tapes sith certain formulas whistle when
you play them back. The tape physically
whistles as it goes past the guide posts
and heads of the tape machine. This modulates
the audio of the playback. I’m sure you guys
are familiar with this, too.
About a month ago, my brother (who is a
local radio history guru) and I were playing
back a radio advertisement made in the
studio of a now gone radio station.
It was the actual physical reel of tape
from (we think) the year 1952. (Yup, so that
tape is 51 years old, just like tapes you
have dealt with, Neil.)
It was whistling quite a bit. I pulled
(how to I describe this?) a loop out
from the left and let the tape go around
a ball point pen that I held out on the
left side of the tape machine. I had to
hold it just right so it wouldn’t whistle.
We got the audio off that we needed.
(Some really lame – by today’s standards –
radio commercial takes for a local furniture
store in Hartford. We did this in the production
studio at WWUH 91.3, U of Hartford for my brother’s
gigantic bunch of audio for a continuous documentary
of old stations. Some REALLY old.)
I’ve heard you can bake tape in the oven
at the LO setting (125 degrees) and get
temporary relief from this problem. The
compound becomes stable for a short
time and you can recover the audio.
You guys must know this too.
I’ve never tried it.
As for organization for reel tapes –
it’s funny – I have tapes of AM and FM broadcast
band DX. There is a rare FM DX catch on the
second side of a reel I have here. The whole rest
of the tape is blank. (First and second sides.)
The DX was some impossible tropo – a 90.3 beyond
a nearer 90.3 beyond the nearest 90.3 MHz station
(about 90 miles away.) An absolutely noiseless
signoff from a station that is practically impossible
to get here. One of those “once in every 10 year”
kind of things. This was back when the FM band
was fairly empty. Anyway – I guess I’ll find that
recording SOME day. I hope. Because I sure don’t
know where it is. I wish I knew.