[geoff]

Fixing one. Anybody have any service info for this ? I have most AKG
service stuff, but not this model ...

geoff

[Scott Dorsey]

In article ,
Geoff wrote:
Fixing one. Anybody have any service info for this ? I have most AKG
service stuff, but not this model ...

geoff

I don't and AKG doesn't either. I believe it's a single follower with a
transformer to tap voltage off. What's it doing?
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[geoff]

On 29/09/2017 2:08 AM, Scott Dorsey wrote:
In article ,
Geoff wrote:
Fixing one. Anybody have any service info for this ? I have most AKG
service stuff, but not this model ...

geoff

I don't and AKG doesn't either. I believe it's a single follower with a
transformer to tap voltage off. What's it doing?
--scott



Was dull and muffled. Got grille off and touched foam filter disk which
instantly turned into powder !

But the problem seems equally in the preamp, but haven't figured out how
to remove past the battery-chamber section yet.

Getting ~12V bias voltage out to cap from from P48 in.

geoff

[Nil[_2_]]

On 29 Sep 2017, geoff wrote in
rec.audio.pro:

Was dull and muffled. Got grille off and touched foam filter disk
which instantly turned into powder !

Do you plan to replace the foam disk? I have a Shure SM58 that the same
thing happened to. The foam lining the grill ball had turned to a tarry
mess some years ago, but I recently found that the foam disk on top of
the capsule had also turned to dust. I carefully scraped it off but I'm
wondering if it's advisable to replace it.

[geoff]

On 29/09/2017 7:54 PM, Nil wrote:
On 29 Sep 2017, geoff wrote in
rec.audio.pro:

Was dull and muffled. Got grille off and touched foam filter disk
which instantly turned into powder !

Do you plan to replace the foam disk? I have a Shure SM58 that the same
thing happened to. The foam lining the grill ball had turned to a tarry
mess some years ago, but I recently found that the foam disk on top of
the capsule had also turned to dust. I carefully scraped it off but I'm
wondering if it's advisable to replace it.


Not replacing. Has a fine metal grille and substantial slip-on foam
pop-filter if required, but probably not to be used for vox anyway.

BTW foam didn't go the sticky way, but a dry fragile web that turned
straight into dry powdery dust.

geoff

[Scott Dorsey]

Nil wrote:
On 29 Sep 2017, geoff wrote in
rec.audio.pro:

Was dull and muffled. Got grille off and touched foam filter disk
which instantly turned into powder !

Do you plan to replace the foam disk? I have a Shure SM58 that the same
thing happened to. The foam lining the grill ball had turned to a tarry
mess some years ago, but I recently found that the foam disk on top of
the capsule had also turned to dust. I carefully scraped it off but I'm
wondering if it's advisable to replace it.

If you remove the foam from the inside of an SM58, you get a lot more top
end. In fact, if you remove the whole ball completely, it sounds like an
SM-57.

On the other hand, if you remove the foam, you get a lot more wind noise
and the mike is a lot more prone to popping.

So, if you want an SM-58, replace the foam. If you really wanted an SM-57
but all you could get was an SM-58, take the foam out.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Nil[_2_]]

On 29 Sep 2017, (Scott Dorsey) wrote in
rec.audio.pro:

If you remove the foam from the inside of an SM58, you get a lot
more top end. In fact, if you remove the whole ball completely,
it sounds like an SM-57.

On the other hand, if you remove the foam, you get a lot more wind
noise and the mike is a lot more prone to popping.

So, if you want an SM-58, replace the foam. If you really wanted
an SM-57 but all you could get was an SM-58, take the foam out.

The foam from the inside of the ball turned to gum many years ago. I
scraped it out and have been using an external foam pop filter over the
outside. I recently discovered new replacement balls on Amazon for
cheap, so I did that. I just recently noticed that the foam disc on top
of the capsule had deteriorated, so I removed it. I probably won't
operate this mic without the ball filter, so I guess the diaphragm is
protected enough and I might as well leave it as is.

[Nil[_2_]]

On 29 Sep 2017, geoff wrote in
rec.audio.pro:

Not replacing. Has a fine metal grille and substantial slip-on
foam pop-filter if required, but probably not to be used for vox
anyway.

BTW foam didn't go the sticky way, but a dry fragile web that
turned straight into dry powdery dust.

The foam inside the grill turned to a gummy mess a long time ago. The
foam disk over the diaphragm did kind of what yours did, got dry and
crumbly. Maybe two different types of foam?

[Scott Dorsey]

Nil wrote:
The foam from the inside of the ball turned to gum many years ago. I
scraped it out and have been using an external foam pop filter over the
outside. I recently discovered new replacement balls on Amazon for
cheap, so I did that. I just recently noticed that the foam disc on top
of the capsule had deteriorated, so I removed it. I probably won't
operate this mic without the ball filter, so I guess the diaphragm is
protected enough and I might as well leave it as is.

All of that stuff is available pretty cheaply from Shure, although their
shipping makes it expensive if you only buy one thing at a time. But as
I pointed out, if you replace all the foam completely on an SM-58, you
get a mike that sounds like a new SM-58. And that's not always what you
want.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Trevor]

On 30/09/2017 7:16 AM, Scott Dorsey wrote:
Nil wrote:
The foam from the inside of the ball turned to gum many years ago. I
scraped it out and have been using an external foam pop filter over the
outside. I recently discovered new replacement balls on Amazon for
cheap, so I did that. I just recently noticed that the foam disc on top
of the capsule had deteriorated, so I removed it. I probably won't
operate this mic without the ball filter, so I guess the diaphragm is
protected enough and I might as well leave it as is.

All of that stuff is available pretty cheaply from Shure, although their
shipping makes it expensive if you only buy one thing at a time. But as
I pointed out, if you replace all the foam completely on an SM-58, you
get a mike that sounds like a new SM-58. And that's not always what you
want.

Of course it is, when you want to use it as a 57 you simply unscrew the
ball. Then you put it back on again for next time you want it for
vocals. Alternatively if you have 57's, slip on a foam sleeve when you
want them for vocals. You never have to worry about having the wrong one
anyway IMO. What I don't need is a 58 with a metal screen and no foam
though. Looks silly on instruments, and no good for vocals.

Trevor.