Hi all,
I have a post-2000 boombox which I've tried recording with using Type II tapes and it worked surprisingly well, bass components were recorded though at a slightly lower level, I was thinking of adding a variable resistor on the tape bias circuit to tweak it to see if it can raise the bass level, anyone know if this is possible?
Thanks in advance,
ferrochrome
I have a post-2000 boombox which I've tried recording with using Type II tapes and it worked surprisingly well, bass components were recorded though at a slightly lower level, I was thinking of adding a variable resistor on the tape bias circuit to tweak it to see if it can raise the bass level, anyone know if this is possible?
Thanks in advance,
ferrochrome
I am not a tape expert, but I seem to recall that HF bias affects treble not bass. Of course, a cheap box might use DC bias.
I'm no expert too, but IME 😀 you should play the tape on a linear system -not a boombox - to tell if and how.
Well, I'm trying to increase the bias a bit to obtain flatter frequency response, the boombox uses AC bias.
Boosting the bias may drop the HF, which may give the impression of boosting the bass. Surely genuine bass response on tape is down to things like head inductance and equalisation accuracy?
Originally it didn't have EQ selection, as the head preamp had EQ selection built-in I added a switch on the corresponding pin and now EQ is selectable for normal and chrome/metal. As mentioned before I'm trying to record Type II which needs a higher bias current than Type I, the bias current now is set at Type I which over-emphasizes the HF.
I have seen the head in a mini-system with Type I recorder which was modded with a bias adjustment to record on Type II, the output resistor for bias was changed to 80-90% of its original value and the head has for 4 years coped with it and still is, though when I get this working for myself I will be trialling with increasing the bias current in small doses.
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