K3HVG wrote:
Scott Dorsey wrote:

I had no idea anyone was still making them! I'll check out the Mouser
catalogue just for grins! Thanks!
--scott


Scott, The Mouser p/n for the best one that they have is 25LM025. There
are others in that particular group, though, both ceramic and crystal.
Again, you can't beat the price.....!

Jeep/K3HVG


Well... spit.... that one is now out of stock. The one above it doesn't
have quite the high freq response but works fine, too. I use both.
Don't know why they don't have both in stock. But... 10kHz is certainly
high enough freq response for tx audio, don't you think?
Jeep/K3HVG

K3HVG wrote:
Well... spit.... that one is now out of stock. The one above it doesn't
have quite the high freq response but works fine, too. I use both.
Don't know why they don't have both in stock. But... 10kHz is certainly
high enough freq response for tx audio, don't you think?

Yeah, the thing about ceramic and crystal mikes is that they all have all
sorts of wacky peaks and dips within the voice passband... the response
is very ragged and that results in the characteristic sound of the mike.
Even if you chop off everything outside of 300 to 4000 Hz, you can still
tell a dynamic D104 from a crystal one.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

On Oct 28, 5:29 pm, "Rick (W-A-one-R-K-T)"
wrote:
I'm looking on ebay for a D-104 microphone to use with my Heath Marauder
transmitter, and I need to make sure I get the right one.

There seems to be differences between models... some are amplified, some
are not; some are high impedance, and some are low.

The sellers for these mics are highly unlikely to know anything worth
knowing about them it seems... so, which one do I need for my Marauder and
how do I make sure I'm getting the right one?

Thanks...

A while back I was able to pickup a clean D-104 at a garage sale from
a guy that called it a "chicken choker". Anyway I got it for $20.00
and it had the amplifier in the bottom of the stand. I removed all the
amplifier and rewired the terminal strip in the bottom. Put on new mic
cable and wired it into my Johnson Ranger. It works like a champ. I
get good audio reports with it.
73, Randy, W5KCM

"Scott Dorsey" wrote in message
...
K3HVG wrote:

Hmmmm. Crystal elements are, as pointed out, subject to failure
arguably far more frequently than dynamic and other types. I continue to
have good success with crystal D-104's, albeit I do take care of them.
Suitable replacement elements are still available at reasonable cost and
D-104's can sound very good on vintage AM gear.

Where are they available? The last I heard, CAD/Astatic was replacing
the crystal elements with dynamic ones if they came in for repair,
claiming
they couldn't make the original crystal any more.

The crystal itself is sealed with a flexible goo... as long as that stays
sealed, it's fine, but as soon as it develops a small crack, atmospheric
moisture gets in.
--scott

Scott -

Mouser carries the Kobitone (Far East) crystal element (see their on-line
catalog)
They are a bit smaller than the original Astatic -- BUT work fine

gb