I have been using a Kenwood MC80 with my K2. I use batteries, but I have
been told that the mic. will power with 5 volts. The mic. does have a
gain/level control that can be used to dial in the right level.
Richard Kent WD8AJG K2 5296
Bill wrote,
I should also mention that I am getting ALC
Ron AC7AC wrote:
There were some mods that changed the gain distribution within the K2 RF and
audio paths that some suggested could increase the IMD. I suspect that's
where the comments about not doing them on a KPA100 came from, although it's
hard to see how an S-9 signal running 5 watts is
Hi Bill,
The K2 has adequate mic gain providing you use the correct microphone! I
use the Heil mics that were available from Elecraft some time ago. I
work all kinds of DX, establishing contact usually on the first or
second call, even in pile-ups. No change in the resistance in my KSB2
Bill wrote,
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
A mic preamp. You can buy some pretty serviceable mixing boards for
very little money. Plug your mic into a cheap Behringer UB502 or UB802
mixer and send the output into your rig's mic jack. You'll get variable
input gain plus some EQ. While Behringer stuff isn't really all that
great, it is
Bill wrote,
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 use the Heil HC-4 dynamic element in my microphone. This element does
not have sufficient gain to drive my K2/100, so I changed
I should also mention that I am getting ALC indication at full power (one
LED bar only).
So next question... anyone recommend electret-based mic's (since the
Elecraft hand version is no longer available)? (I'd like to try that first
before additonal mods)
I have a wealth of Ten Tec
Good point, Gregg!
I have the FL1 BFO frequency on my K2 set for optimum transmit audio (using
the OPT1 filter of course). For my taste the receive audio is a bit bright
on many signals (not enough low frequency response) so I have the FL2
position BFO frequency set up to shift the passband for a
As an experiment, I'm going to try the KSB2 R14 mod (change value to
something 5k to 10k).
I have a couple of other irons in the fire that I will look at as well, but
this one was quick and I had the parts.
What negative effects should I watch for? I have a 100Mhz scope... anything
I
There's nothing to look for. All you're doing by increasing the value of R14
is increasing the amount of audio from the mic reaching the audio (speech
compressor) chip.
It has the same effect as screaming into your mic, without all the noise or
getting yourself hoarse G.
Now, there is a
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.
Bill,
The Yaesu MH31 mic will normally drive the K2 to full output with no
problem.
I really cannot coment on the difference between your Yaesu and the K2 power
out as indicated on your meter - I do not know how your particular meter
responds, but I know you have a mic gain control on the Yaesu
There were some mods that changed the gain distribution within the K2 RF and
audio paths that some suggested could increase the IMD. I suspect that's
where the comments about not doing them on a KPA100 came from, although it's
hard to see how an S-9 signal running 5 watts is any less sensitive to
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