10 FIDELIPAC Model 380-63 NAB AA Cartridges 100 Second @ 7.5 IPS MASTER CART

Description

Master Cart With Factory 1KHZ and 10KHZ Signal Tested
You will receive is a total of 10 Master Carts Model 380-63 one white & Blue box as pictured
This is a better grade than the standard cart
The cartridge top is not clear but is a tint
We ship to USA Zip Codes Only
I have 19 cartons of 10 boxes of 10 cartridges per box
Fidelipac (commonly known as an NAB cartridge) was a magnetic tape cartridge format, used in radio broadcasting for playback of material such as radio commercials or jingles. It was the first audio tape cartridge commercially available when it was introduced in 1959 by Collins Radio.
Fidelipac used ¼-inch endless loop tape, with two or three tracks one of which was used to cue the tape. Most players ran at 7.5 inches per second, though some could also run at 3.75 or 15 ips.
There were three sizes of Fidelipac available; the 4-inch wide A size (up to 10.5 minutes playing time), the 6-inch wide B size, and the 8-inch wide C size. The most commonly used for broadcasting purposes was the A size, and the B and C sizes were usually used for background music applications where the tape speed usually was 3.75 inches per second for longer playing times.
Fidelipac was adapted as the basis for the 4-Track Stereo-Pak cartridge. Other similar cartridge designs were later used in broadcasting, such as the Audiopakand Scotchcart.
Unlike the 8-Track cartridge (but like the 4-Track cartridge), the pinch roller was built into the player and swung into place through a hole in the cartridge.
Fidelipac was widely used at radio stations until the late 1990's, when such formats as Mini Disc and computerized broadcast automation made it obsolete.
Model 300
Recommended for general purpose monophonic use at standard operating levels.
MASTER CART
Recommended for stereo applications requiring standard operating levels.
DYNAMAX® COBALT
Recommended for critical applications requiring elevated recording levels, maximum Signal/Noise performance and extended high-frequency headroom.