transmit. I found that my Heil Pro headset was too muddy so I tailored the
Gregg R. Lengling, W9DHI, Retired,Again
> Bill et al,
>
> A few years ago Bob Hightower, NK7M,s old a mic preamp kit designed . The
> printed circuit board was small and fit inside the K2 or some microphones.
> I got one and have had good results from it. I use the Kenwood stock hand
> microphone for the TS-850S. I picked the mic up on ebay for $20.
>
> The links to Bob's preamp kit are not valid. Maybe someone else knows how
> to reach Bob.
>
> Mark, KJ7BS
> Glendale, AZ
>
> ---- Bill Acito <
[hidden email]> wrote:
>
> =============
> I was finally able to get my K2 (#0061) upgraded to a K2/100 just prior to
> CQWW this past weekend. The KPA100 was bought in 2004 and sat on a shelf
> for
> a year or two.
>
> Anyway, I was doing some A/B checks after completing and testing the unit,
> while trying to call some stations on 20 meters.
>
> I compared a Yeasu FT-890 to the K2/100.
> I noticed there were a few stations that I called and called on the K2,
> that
> were then workable in one or two calls after switching over to the FT-890.
> I
> did some power checks, and found that in CW mode, the K2 was the same, if
> not slightly more power (reading on the same meter, same antenna, using an
> A/B switch)
>
> But on SSB, the voice peaks of the K2 are 25-30% lower than those of the
> FT-890. I am using dynamic mikes on both radios... on the K2 it's a Yaesu
> MH-31 Mic. I also used this mic on both radios and noted voice power peaks
> almost twice that of the K2 (70 w vs 40w). My K2 is set for SSBA of 3, and
> SSBC of 3-1. My KSB2 firmware is 1.07
>
> I have seen a few references to mods on the KSB2, including swapping
> resistors to increase mic gain. I have also seen references that they
> should
> not be done on K2/100 units.
>
> Are there any internal mic gain mods that can be used on the KSB2 in a
> K2/100? Is there anything else I can do short of the external mic amp?
>
> I also notice that sometimes I get full power on the first "letter",
> sometimes it starts lower on "whiskey 1" and bumps up on "papa alpha" --
> anyone else seen this on the K2/100?
>
> Bill
> W1PA (K2 FT #61)
>
>
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