YAESU MD-100 to yaesu 840 Mod

[TonyV225]

Can anyone explain what the supposed mod if or on the Yaesu MD-100 desk mic to use it on the FT-840 I was told it had something to do with the filtering or it working properly. The mod involve doing something with the cord

 

[TonyV225]

Yaesu] For Sale MD-100a8x 5 Volt Audio Filter Mod Kit
from [Thomas Giella KN4LF] [Permanent Link][Original]

To: <yaesu@contesting.com>
Subject: [Yaesu] For Sale MD-100a8x 5 Volt Audio Filter Mod Kit
From: kn4lf@tampabay.rr.com (Thomas Giella KN4LF)
Date: Fri Jun 27 11:14:30 2003

For Sale Yaesu MD-100a8x 5 Volt Audio Filter Modification Kit

Many of us who own the excellent MD-100a8x desk microphone are painfully aware
that we can not use
the built in audio filtering on many of Yaesu's rigs. The MD-100a8x was
designed to be used with the popular FT-1000MP series and also the FT-900 and I
think the FT-920. Rigs such as the FT-1000/D, FT-990, FT-890, FT-840,
FT-757GXII, FT-747GX and others will not work with the internal active
filtering of the mic, as these rigs do not supply the 5 volts output on the 8
pin male microphone plug necessary to power the mic.

In the past Yaesu made available a technical bulletin that described a
modification to allow the internal audio filtering of the mic to be used with
most of it's modern transceivers. Unfortunately though the mod was complex and
required physical changes to the rig and microphone that could be irreversible.

I have designed a modification kit that overcomes the invasive and complex
changes to the rig and microphone, to allow
use of the internal audio filtering. The mod kit comes with explicit
directions, photographs and schematics, much like a Heath kit. The kit building
level experience needed is just above beginner, requiring some simple soldering
and the cutting of one easily restorable circuit board trace inside the mic.

The modification kit costs $29.95 plus actual USPS shipping costs. For an
additional $10.00 I will build the kit and all you have to do is cut the one
circuit board trace inside the mic.

For more information and questions email me at kn4lf@tampabay.rr.com . Later
today I will place the mic mod on eBay and will post it back on the Yaesu email
reflectors.


73,
Thomas F. Giella, KN4LF
Plant City, FL, USA
EL87WX

Florida Space & Atmospheric Weather Institute:
http://www.kn4lf.com/fsawi.htm

Friend Website Design Studio:
http://www.kn4lf.com




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