Old thread popped up again
It sure looks like i'm sticking with MM for the foreseable(Sp?!) future.
I've been reading the massive cartridge loading thread on here with some
interest, it got me wondering if there was anyway I could 'simply' upgrade
my Cyrus inbuilt phonostage for use with MM? Removing components
(like the 100p loading caps!?), replacing/improving them ??
I'm up for some careful soldering, i've printed off the circuits
On inspection there does not seem anything you can simply do to "improve"
the phono stage for "normal" MM 's. High/mediam output MC's as already
discussed are a diffrent matter.
C11 the loading capacitor can be freely varied, as could the 47K R19.
R17 and C13 are a radio frequency filter and likely best not removed.
This thread already covers some modifications, unfortunately there is
no "right" or "ideal" way of modding, to a degree you have to work
out your own philosophy (of what is worthwhile) for upgrading.
At a mimimum replace all electrolytics with good new ones. Pay attention
to coupling capacitors, decoupling capacitors for the op-amps and the
supply capacitors, use IC data sheets if uncertain of value ranges.
C31 and C43 in the power amp should be considered. IMO bypassing
C43 (after replacing it) may be worthwhile. Also note fitting the "biggest"
capacitors for film types is a trade-off between size and voltage rating.
In some positions increasing either will reduce distortion.
One thing not suggested is capacitors across supply diodes, like here :http://home.computer.net/~pritch/shortwav.htm
Note that the capacitors should be purposefully "poor" quality ceramics.