Hello Scott,

I am interested in upgrading a couple of my APEX 430 condensors. I have
recently been getting some background noise from these mics and I though
this mod would rectify the problem. There must be some caps going bad or
something to that effect. It sounds like a low level rumble. Sometimes it
will go away after a few min.

Are you still selling your upgrade kits for this style of mics? I know that
this upgrade kit is adaptable to the MXL 2001 and a few other brands, but I
wasn't sure if it would work for the APEX 430s. The guts do look similar.

Thanks for your time,
ART

ART wrote:

I am interested in upgrading a couple of my APEX 430 condensors. I have
recently been getting some background noise from these mics and I though
this mod would rectify the problem. There must be some caps going bad or
something to that effect. It sounds like a low level rumble. Sometimes it
will go away after a few min.

Odds are this is due to gunk on the PC board, or possibly gunk on the
capsule. This is very high impedance stuff. Spray the board with flux
remover and see if the noise goes away. If it doesn't, the capsule
may need to be cleaned, and that's harder. (It could also be a failing
capacitor, but that's a lot less likely.... cleanliness on the production
line is not exactly good in some of these facilities). It does not take
much flux or dirt to be a serious problem because even a tiny amount of
current leakage is disasterous with the high input impedance.

Are you still selling your upgrade kits for this style of mics? I know that
this upgrade kit is adaptable to the MXL 2001 and a few other brands, but I
wasn't sure if it would work for the APEX 430s. The guts do look similar.

I am. All of these mikes are either made at the Feilo plant, or at a plant
run by people trained at Feilo and using their designs. If you get the
original article from Recording (call 303-516-9118 and order the thing;
they know which issue it is even though I don't offhand), the boards are
available for the same price.

I also now have a slightly improved kit which includes standoffs to
mount the high impedance stuff on; it makes construction a little bit
easier and you don't have to be as careful about cleaning the board.
It's $20 for the regular board+fet kit, and $25 for the one with the
standoffs. You could also save $15 and order just the FET from me and
use perfboard, but frankly it's a pain in the neck and the $25 is worth
the time savings.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

"Scott Dorsey" wrote in message
...
ART wrote:
Are you still selling your upgrade kits for this style of mics? I know
that
this upgrade kit is adaptable to the MXL 2001 and a few other brands, but
I
wasn't sure if it would work for the APEX 430s. The guts do look similar.

I am. All of these mikes are either made at the Feilo plant, or at a
plant
run by people trained at Feilo and using their designs. If you get the
original article from Recording (call 303-516-9118 and order the thing;
they know which issue it is even though I don't offhand), the boards are
available for the same price.

I also now have a slightly improved kit which includes standoffs to
mount the high impedance stuff on; it makes construction a little bit
easier and you don't have to be as careful about cleaning the board.
It's $20 for the regular board+fet kit, and $25 for the one with the
standoffs. You could also save $15 and order just the FET from me and
use perfboard, but frankly it's a pain in the neck and the $25 is worth
the time savings.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Hi again Scott,

That sounds great! I actually might still have a copy of that issue in my
files. Thanks for the phone number. I might have to call them to save some
time filtering through the issues.

How do you handle the payment end of things. Would you want a money order or
would Paypal be an option?

Thanks again
ART

ART wrote:
That sounds great! I actually might still have a copy of that issue in my
files. Thanks for the phone number. I might have to call them to save some
time filtering through the issues.

How do you handle the payment end of things. Would you want a money order or
would Paypal be an option?

Money order or personal check are just fine. I have pretty much given up
on dealing with Paypal these days due to worries about security.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."