Hello Tyra,

From my measurements: currently available TDK D-60 tapes have better 
magnetic coating evenness than Maxell UR-60 tapes.

Recorded level unevenness measured across the tape is 0.2 dB @ 400 Hz 
typical for TDK D-60.

Recorded level unevenness measured along the tape is 0.5 dB @ 400 Hz 
typical.

Maxell type I tapes (UR-60) have 0.8dB/1dB recorded level unevenness.

TDK tapes have lower drop-off ratio.

THD distortions are the same 0.7% but, IMD distortions are lower on TDK 
D-60.

1.9% for TDK D-60, 3.8% for Maxell UR 60 (bias has been adjusted for minimum 
distortion for each type of tape).



Hope it will help.



All the best from

Gennady Lyskin

G e n n L a b
http://www.gennlab.com
[log in to unmask]
Tel: +64 21 238 3056
New Zealand

----- Original Message ----- 
From: "Grant, Tyra" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, October 31, 2012 7:32 AM
Subject: [ARSCLIST] Seeking blank audiocassette recommendation


We've been asked to transfer a collection of audio content to cassettes.
Is there a particular recommended cassette tape type  I should try to order 
(assuming 60 min. tape length)?
Thanks,
Tyra Grant

University of Kansas Libraries