Weak fm reception

[dr. d]

i tried checking the antenna kung putol yung connection pero hindi ko mabuksan talaga kasi iba yung screws ng sa gen1 crv. looks like i'll have to buy yung mga universal antenna.

are they any good?

you replaced your HU and it's still weak..
it's probably the antenna connection, as the others already say. after all, your ride is 25 years old..
if you can access the antenna jack end, you can check whether the connection is ok or not, using an ohmmeter.

universal antenna ? replacing your old antenna with a new, generic one (200 kesos siguro) may be, in my opinion, a better option. i have this negative thing about inboard antennas... they clutter the dash..
sometimes, when the old antenna is removed, the break in the connection may be easily seen and remedied.

hex screws? you can easily purchase these from the mall. they're not expensive. even from the 66 or 88 pesos japan stores..
if you are not sure whether it really is a hex screw or not, you may make a clay indentation of the ones screwing your antenna, and show them to the salesman. he'll know what to give you. btw, these specialized screws are usually and best bought, as a set. it's not easy to eyeball the size, kasi. (and star screws may sometimes be mistaken for hex screws.)
good luck.