Hello All,
I was chasing DX on the low end of 10m yesterday (good paths to VK!)
and noted that even with phones on, I had the AF gain all the way up...and
could
use more.
Perhaps this was due to the headphones I was using, but I wonder if others
have noted the same thing. I think this is the
Have provision to plug in regular keyboard.
I have a 11 regular keyboard I use for portable
operations. There probably would be a good market for
a converter/display like that. Why tie it to the KX1,
or FSK31?
Indeed, there is now such a device, from AmQRP.org,
called the Micro908. I have
Hi John
This has been an ongoing observation from the beginning of the K2's life.
It seems the audio amp is very sensitive to the headphone impedance and
efficiency. Some folks have very low audio and others seem to do just
fine.
I get my best results with some old large Radio Shack headphones
I use a pair of Sony 32 ohm phones and have
plenty of audio out of the K2.
73,
Doug
W6JD
- Original Message -
From: john [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Sunday, October 10, 2004 4:01 AM
Subject: [Elecraft] Audio levels in K2
Hello All,
I was chasing DX on the
We've been over this topic many times. If you go thru the reflector
archives you find that most of the low audio problems are caused by
improperly setting the AGC during alignment. A quick test is to shut off
the AGC by pressing PRE/ATT and AGC together. If the volume comes shooting
up the AGC
Hello
I am looking for a CW filter for a kenwood TS 520
Number YG-3395 anyone have and want to sell ?
Perry WA8THK [EMAIL PROTECTED]
=
PERRY WA8THK FP#582
GAINES, MICHIGAN -USA
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In a message dated 10/10/04 1:44:22 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
We've been over this topic many times. If you go thru the reflector
archives you find that most of the low audio problems are caused by
improperly setting the AGC during alignment. A quick test is to
There is an alternative way to increase the K2 audio output to headphones.
The K2 RF board contains series 82 ohm resistors at R35 and R36 to reduce
the volume for more sensitive headphones. If you have low impedance or
insensitive headphones, the value of these two resistors can be reduced to
Just in case you wonderful readers didn't know. This year marks the 100th
anniversary of the invention of the Fleming Valve also known as the
TUBE. In 1904 Sir Ambrose Fleming patented the Valve Diode and thus led
us faster down the path of electronics.
So Happy 100th Birthday for the VALVE!
One option for more volume would be to change the LM380 audio amp to an LM386.
There are only 3 pins in common, but 3 others are just offset one hole and
could be easily done by hand. Add a 10 uF cap across the remaining two pins,
and you've got 12 db more gain than the original. You might even
This weekend turned out to be as good as the one two weeks ago. Three new
counties QRPp - two in IA and one in AR to bring the total worked QRPp to
2,624.
Better yet, with those and by working a few others at new power levels I
managed to cut another 20 watts off the total power to work the
- Original Message -
But some of us have experienced apparently low overall gain (not low
audio)
even with the AGC off.
Jim and all,
For older K2s, I have seen one report that changing the winding of T7 from
the old 11:3 turns to the newer 20:5 turns allows one to pick up an
Thanks to help from Bill, Tom, and from the wilds of Nova Scotia: Gary we
achieved a very good number of check ins. The band was quiet and the help
was able. Thank you very much. We got a few new faces on 20 meters
(14049.5 kHz) and welcomed back a number of regulars. Ric was caught
using
Howdy,
40 meters was a bit more difficult than was the 20 meter net. First I
had to pass off control early since I had tuned on the wrong antenna :(
Tom worked away through the Heartland logging folks from ND, PA, TN, KY
then branched off to FL. He ran the well dry I thought and then
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