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Author Topic: What mic are you using on your KWM-380?  (Read 162 times)

N2ZD

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What mic are you using on your KWM-380?
« on: February 22, 2023, 06:57:56 AM »


  I picked one of these up and I’m interested to know what mic you use on yours and why.
   Mine came with a D-104, but you had to drive it hard to make it work. I did read of a guy who built a preamp for his.
   I opted to swap the D-104 for a Shure 444D and it seems to be a better match for the rig. I’m wondering what other guys are using on theirs.

Regards, Richy N2ZD
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ZS5WC

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Re: What mic are you using on your KWM-380?
« Reply #1 on: February 22, 2023, 09:22:47 AM »

 :)I use a Shure 444, Turner +2 or 3 will also work well.
73 de William, ZS4L / ZS5WC
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N5XJT

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Re: What mic are you using on your KWM-380?
« Reply #2 on: February 22, 2023, 11:00:19 AM »

Hard to beat the Shure 444 Hi-Z.
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KD6VXI

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Re: What mic are you using on your KWM-380?
« Reply #3 on: February 22, 2023, 11:39:48 AM »

D104 with source follower.  Bam.  Up to 9 volts of audio munkey swing!

Put a switch and 2 resistors in it and now you have a polarity flipper!   Set for most pep output at lowest audio drive level and you know it's set correctly.  If you have a symmetrical voice it won't matter.

You can use a 500k fixed resistor and a 10 Meg pot across the mic element to adjust the tonal quality from near flat to a high pitched ssb screamer the amplified D104s are known for.

The D104 is a magical mic.  Put a good preamp, with a couple megohm input impedance on a non amplified one and it will keep up with any RE or other mic out there.

--Shane
WP2ASS / ex KD6VXI
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N8YX

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Re: What mic are you using on your KWM-380?
« Reply #4 on: February 23, 2023, 12:11:40 PM »

IIRC, OEM mic was a Telex 75x series, just re-badged (like Drake did with the Astatic 878).
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N2ZD

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Re: What mic are you using on your KWM-380?
« Reply #5 on: February 24, 2023, 03:54:02 AM »

Thanks for your input gents! I'm going to mod my D-104 and keep the 444D as well.

Regards, Richy N2ZD
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