Del foro de Gearslutz, posteado por Michael Joly (de Oktavamods):
"So, regarding ribbon tension...
Bring the ribbon up to tension so that there is just the tiniest amount of sag in the middle when the ribbon is horizontal (say 0.5mm), Then tap the motor structure with your finger and watch for the vertical oscillation of the ribbon. You should see a rapid flutter of the ribbon, perhaps around 10Hz rate. If the ribbon is too tight, and the resonance too high, the vibration of the ribbon will exceed the ability of our vision system to follow the motion and it will just be a blur - probably around 50Hz as I note above. So the 0.5mm sag and loss of visible motion define the lower and upper limits for ribbon tension.
You could do a more accurate job by using the spectral analyzer software available in many sound recording applications. In this case, tension the ribbon as above, connect the ribbon mic to your recording system, tap the motor repeatedly, record the thumping, analyze the resonant frequency then repeat the procedure until you get a ribbon tuned to about 42Hz in the case of a Fathead or RSM-4 type mic, or 20Hz for an Apex 205 type mic."
Vamos, que a pelo dandole toquecitos al motor, se graba y con el analizador del secuenciador se va ajustando hasta que resuene entre 42 y 20 herzios dependiendo del micro (en tu caso 42 hz
). Si se hace a pelo que al darle con el dedico al motor veas vibrar a toda ostia la cinta, si vibra tan rapido que no puedes verlo te has pasado tensionando
De momento las cintas de los mios parecen intactas, pero si tengo que hacer nuevas cintas (o me apetece cambiarlas por otras mas finas) y no encuentro el material ya te doy un toque jefazo! muchas gracias!
