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 .
Now, there is a *differen
Hi Don,
Thanks for your advice in the past. I used K2 in the CQ WW SSb contest.
When I engaged the KDSP2, I found that there was too much artifact under
SSB mode. I would be grateful if you could advise how I can adjust the
parameters to lessen the artifact. I notice there are two paramet
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 sho
The issue with those leads is that with a little too much pressure pulling
on one and you can pull it off! Those caps are actually chip type
capacitors, just like the surface mount types, with leads attached to the
terminals then the whole thing is dipped in epoxy.
Those types of capacitors are n
I need to hang my head in shame. After sending the email, I was
looking in the schematic to see if there were any other places I could
test for a signal. That's when I realized there were 2 P5's. Of
course, I had plugged the speaker into the wrong one (on the control
board). Plugging it into t
Vic:
Congratulations on your 50th year in this wonderful hobby. Your email got
me to checking and I also will celebrate the completion of 50 years on the
27th of this month. On November 27, 1956, at the ripe age of 16, I received
the callsign KN4LXU. In March 1957 I removed the "N" from the
Looking like ELECRAFT should consider getting into the
STEALTH ANTENNA game. A stealth vertical perhaps, one
could just lean up against the home.
Or a gutter-shaped antenna, that would easily attach
to one's home front facia. There's certainly
interest and need for one.
Fred
N3CSY
displ
When I constructed my K2, there were at least a dozen
smaller disc capacitors - with lead spacing wider than
the PCB board holes. In those cases I felt it was
better to mount the disc C close to the board and keep
the leads short. So in each case, I carefully bent
one of the leads at a right angl
Just got S/N 5778 on last week on cw and ssb during the cqwwssb test this
weekend. Works fine - great receiver... Great building project with the finest
kit since the heathkits of many years ago.
73s Jim K4JAF
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George,
The 1/8 inch refers to the lead length above the board, not the overall
height of the capacitors. A small bit of pressure will put them at less
than 1/8 inch of lead sticking above the board.
73,
Don W3FPR
> -Original Message-
>
> I think this has come up before, but I can't fi
Hello all,
I have some prewound toroid kits from Mychael Morohovich, The Toroid
Guy, that are excess to my needs. They have never been opened and are of
course in perfect condition. Each is available for 25% off of the retail
price, plus postage. Please let me know if I can help you out. S
I think this has come up before, but I can't find an answer in the archives.
KSB2 manual, page 6 says: "The leads on small capacitors do not need to be
straightened, but keep their mounted height at about 1/8" (3mm) or less." I
find that if I don"t straighten them, they stick up about 3/16" or
RC,
The nylon hardware keeps the toroid from moving mechanically and keeps the
frequency stable. It should be a simple matter to just add the hardware to
keep it stable. There should be no major change when adding the hardware.
73,
Don W3FPR
> -Original Message-
>
> I just completed A
I just completed Assembly Part III resistance checks are Okay...
Collector of Q7/Q8 do not show shorts
I found that I missed installing the nylon hardware on T5 [duh]
will it make a difference
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Now this method is a bit convoluted, but you could put extra long leads on
an ohm meter that will measure low ohms. Start at the feedpoint with one
lead, and experimentally tap onto the antenna where you think the 55 foot
point is. If you have found the center, you will have the resistance of
Vic,
As my Polish relatives would say - "Sto Lat" may you have 100 years!
--
Larry W2LJ
QRP - When you care to send the very least!
http://www.w2lj.qrpradio.com
http://w2lj.blogspot.com/
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Yo
, I feel like such a newbie.
Congrats!
Mike
AI4NS
First licensed 1972.
50 years ago plus a few days, a 13-year old kid feverishly tore open a
little envelope and for the first time saw the call sign that would
identify him to the radio world. Dated October 30, 1956, that 'ticket'
and those le
My K2 is working! I finished it and the internal battery pack this
weekend. I started building it in July and 46 (non-consecutive) hours
later it works!
I have a problem with the speaker though. I hear the audio with
headphones plugged in, but don't hear anything through the speaker
with no he
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
Congratulations Vic from the members of QRP-Canada! - 72 Bruce.
72/73 - Bruce ve5rc/ve5qrp - QRP-C#1, QRP-L#886, A1 Operator
Enter QRP-Canada's "RUN with RAC" contest -
details - http://www.qrp-canada.com
___
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Just remember also that the OP1 filter for SSB receive is also used on
transmit. I found that my Heil Pro headset was too muddy so I tailored the
OP1 filter for best response and have got fantastic audio reports on my K2.
Gregg R. Lengling, W9DHI, Retired,Again
K2/100 SN 3075
http://www.milwau
Anyone looking for a 'spooky' QSO over Halloween might keep their
ears peeled for W0O, operating from Frankenstein Missouri USA, and
operated by members of the MID-MO ARC (Jefferson City MO).
Our tentative operating frequencies are:
3.535 - 3.545
7.035 - 7.045
10.113
14.035 - 14.045
21.035 - 2
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
Congratulations on half-century in Ham Radio, Vic (K2VCO).
Keep juicing up those transistors.
73,
de Joe, aa4nn
License Sep1955 as K5GFN, AA4NN Feb1977
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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 equipmen
Congrats on a half-century in Ham Radio, Vic (K2VCO). Here's to 50 more
for you!
73, de Earl, K6SE (first licensed June 1955)
K2/100 #2622
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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
50 years ago plus a few days, a 13-year old kid feverishly tore open a
little envelope and for the first time saw the call sign that would
identify him to the radio world. Dated October 30, 1956, that 'ticket'
and those letters (less one 'N') have been with me since, through so
many jobs, a co
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 mo
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
I think there is another way to look at this. N1MM Logger is the
center point of what you do in the contest. You should make changes
in N1MM Logger, and have it change the radio instead of doing the
same thing on the radio. That way Logger is always under control. The
exception to this is c
Its that time of year again. The weather is getting cold and it's time to
build another kit.
I have K2/100, serial number 5439 for sale. I built this rig in late spring
and
summer of this year. It is in new condition. I have been building kits for
30+
years including several from Elecraft.
I replied to the original post on this, and I believe I came to the wrong
conclusion. My excuse is that I'm new with N1MM !
When I tested this, I activated VFO B by just switching the VFOs on the K2.
That activated the VFO B bandmap, and I concluded that VFO B was the
"active" (my term) N1MM VFO
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
boards
I only listened. I used the crazy contest as a way to evaluate my
receivers. Hooked both rigs up to my 32' vertical and listened on 40
meters. The CW portion of the band was full of SSB. I started with the
830s and it was doing OK. Not much grunge being generated in the
receiver. I then switc
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 any
Did that, thanks! It helped a little.
73 - Ken
--- Vic K2VCO <[EMAIL PROTECTED]> wrote:
> Ken Alexander wrote:
> > Hi Don, and all other responders,
> >
> > I guess I'll have to shop around for a better USB
> to
> > serial adapter. My desktop computer is far too
> noisy
> > to use with any H
Hi Mark:
I'm no expert on N1MM logger but I have used it with the K2. I just
tried it using v6.10.10, but I know this has worked before with earlier
versions. When you use both VFO A and VFO B, you need to have 2 data
entry windows open, one for A and one for B. There are key shortcuts to
switch b
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