for an operating position on a 2nd floor is to always use
balanced antennas and keep any extra RF off the outside of coax feedlines -
this puts the RF ground out at the antenna location where it belongs.
73,
Don W3FPR
-Original Message-
Glenn, Bob and all,
What constitutes a good utility ground
Counterclockwise around
the DIP when viewed from the top.
Also look for shorts, solder connections etc in the vicintiy of U6 pin 1, C1
and C15.
73,
Don W3FPR
-Original Message-
Folks,
I am at page 42 in the manual, doing resistance checks, and I find that
some are off, specifically
tuned to a real QSO at the time.
73,
Don W3FPR
-Original Message-
Does anybody know the why the cover of the K2 Manual has the K2 dialed
to 14205.73?
Is that a frequent K2 net frequency or is it just happenstance?
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus
time
between characters should look just like an extended stop bit. On the basis
of that thinking, it should work with any number of stop bits - from one to
infinity.
73,
Don W3FPR
-Original Message-
Hi,
Fired up my K2 Elecraft (#4927) with N1MM Logger program and
found out
would likely be in the
transmit or receive paths.
73,
Don W3FPR
-Original Message-
I'm looking for a nice CW transciever to experiment on. Since I
have so much
respect for Elecraft and I can't really get a MP+ anymore, I
figured I'd go it
on my own with a K1 or K2. I am attracted
on the boards, like when you press the menu button - don't overlook
things of that nature. The most likely problem is an unsoldered or poorly
soldered connection.
73,
Don W3FPR
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Zac Brown
Sent: Sunday, July 17, 2005 6
a better job of matching the diodes and straighten it out, but in the
meantime I trust my known 50 ohm non-reactive dummy load and my 'scope or RF
probe a lot more.
73,
Don W3FPR
-Original Message-
Just finished building KX-1 #1207 with 30m board and ATU. Nice
little rig!
After
of noise.
73,
Don W3FPR
-Original Message-
With technology available today I wonder if it would be possible
to design a
2-stage tracking NB!
Just in the same manner as auto beat canceling.
I'm a better builder than designer , but can't help myself
throwing out some
thoughts
. Try doing the Receiver Signal
Tracing steps detailed in the Troubleshooting appendix of the K2 manual.
73,
Don W3FPR
-Original Message-
Hello all,
While checking my K2/100 before heading off on an IOTA trip (to OC-206
in August), to my amazement, I discovered that the receiver
filter tuning
peaks.
73,
Don W3FPR
-Original Message-
Last night, I finished building and testing the KPA100. Today, I
made several QRO contacts and got good reports on the audio from
the KSB2 and the Heil desk mike.
K2 # 4970 also has the noise blanker, DSP filter and 160 meters
change, you will end up with the electrical equivalent of a brand
new K2.
73,
Don W3FPR
-Original Message-
Just picked up a K2 no 00374 to join my K1, I have a question about the
menu.
In the ops manual it says that Mic Gain SSBA is from 0 to 255 and the
Processor level SSBP is also 0
Dan,
Take a walk through the electrical section of your local DIY-type store and
look for the waterproof enclosures they have there - NEMA boxes are
excellent for outdoor use and are waterproof when used with the proper
fittings.
73,
Don W3FPR
-Original Message-
Any thoughts
Kevin,
If you have a KAT2 or a KAT100, that switch is built in. Connect each
feedline to a 1:1 current balun and a short piece of coax to the tuner -
Pre-tune each antenna before your comparison, and the ANT 1/2 button will
switch them for you.
73,
Don W3FPR
-Original Message-
I
Craig,
The KAT2 has changed little. To bring it up to date, change R6 to 470 ohms
and upgrade the firmware. That is all that I am aware of - if someone has
better info, please correct me. Mine works fine with those 2 changes, and
my unit was one of the initial Field Test models.
73,
Don W3FPR
remains in and divide that section
into 2 groups again - you don't have to make as many cuts, and you will find
it more quickly.
I don't know of an easier method unless you happen to spot a solder bridge
along the way.
73,
Don W3FPR
-Original Message-
. When
I remove U1 on the kpa100 board
the frequency? The BFO is actually a
VXO, and the frequency is controlled by changing the capacitance in the
circuit - normally that is done by changing the voltage on the varicaps, but
since your total capacitance range was slightly out of normal a small padder
capacitor needed to be added.
73,
Don W3FPR
everything within range on all bands. See
the VCO alignment section of the manual (page 61 in the Rev F manual).
If you cannot get 160 meters within range C75 may be at the lower edge of
its tolerance, a small padder capacitor can often be added across C75 to
bring things in line.
73,
Don W3FPR
and something (your hand maybe) shifted the turns on
T5 slightly - stranger things have happened.
73,
Don W3FPR
-Original Message-
Ken,
It is the VCO - not the bandpass filters. The VCO will stop changing
frequency when the voltage at the left end of R30 goes much above 7.7
ones) to create an adapter rather than
cutting the cord - only becuase of the soldering problem.
For those who have a variety of mics, I strongly suggest creating an adapter
for each one and wire the K2 mic header straight across (Elecraft mic
wiring).
73,
Don W3FPR
-Original Message
such things if there is only one sourcing choice.
Google and other search engines will often show you where to find a
particular part.
73,
Don W3FPR
-Original Message-
I'm looking for some parts. IF you use a company other than Mouser,
Jameco Allied I would really like to know
resistors are non-inductive, and no
change is recommended - 'If it ain't broke, don't fix it'.
73,
Don W3FPR
-Original Message-
I have one of the older KPA100s and have done all the mods and
upgrades. However, I have seen a recommendation to change C80
and C81 from 4700 to 5600. I have
sheet 1
to see which pins correspond to which relays.
73,
Don W3FPR
-Original Message-
In troubleshooting a relay problem on my KAT100, Gary advised me
to check the
signal /8R, generated by Q3. I think Q3 may be faulty, since
(using a Fluke
DMM) signal /8R alternates between zero
shown in the appendix.
73,
Don W3FPR
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Roland
Sent: Saturday, July 23, 2005 1:24 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Weak reception after Phase II
I just completed the phase II alignment
returns to work on Monday.
73,
Don W3FPR
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED]
Sent: Saturday, July 23, 2005 2:43 PM
To: [EMAIL PROTECTED]; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT100 signal question
Thanks, Don
wire
across the cut - solder the wire in place and you have a permanent repair.
And it doesn't look unsightly at all IMHO, YMMV.
73,
Don W3FPR
-Original Message-
Hi all,
This is just a helpful tip for those who might need to debug an Elecraft
product.
I needed to isolate some items
one
chance to look for it after tapping the button.
The FPDATA lines communicate different data, so there is no proper
comparison between the relay control and the front panel control.
73,
Don W3FPR
-Original Message-
Jack, as I mentioned to Don, I get NO relay action on ANY relay
level by
changing the Control Board R1 value and leave the regulator as it is. As I
recall, you may have optimized the AGC Threshold the last time you 'tweaked'
your K2.
73,
Don W3FPR
-Original Message-
NB: this posting is about an Elecraft radio
;-)
* * *
I was thinking about
just as well.
I personally would be concerned about leaving a trimmeer in place because of
the possibility of the setting being changed, but certainly using a trimmer
to determine the exact value required would be an easy method.
73,
Don W3FPR
-Original Message-
Hi Don,
You said
Folks,
After thinking about this voltmeter 'adjustment' a bit more, I discovered I
had erred. The value of R10 should be INCREASED to make the reading higher.
Sorry - I guess I had a 'senior moment' and got my head turned around wrong.
73,
Don W3FPR
-Original Message-
Jean-Francois
because there is no input to the firmware to indicate when the voltmeter is
in the INT or the EXT position.
I hope I did not give the wrong impression - I am not advocating nor
recommending this as a change, I was simply responding to those folks who
wanted to know how to do it.
73,
Don W3FPR
John,
It is very likely a wire stuck (magnetically) to the speaker and touching
the speaker cone. It could be on the outside of the speaker (if you are
fortunate) or it could be on the inside and you will have to remove the
speaker to see it.
73,
Don W3FPR
-Original Message-
Has
associated with
the wattmeter (in the KAT100).
73,
Don W3FPR
-Original Message-
Yesterday the air conditioning went out in my ham shack while I
was using my K2/100. The temperature went up to 95F, and the K2
became quite hot while running at 100 watts. I noticed that when
I changed bands
and 'the speaker won't work'.
73,
Don W3FPR
-Original Message-
Just completed the phase III and thought everything was
hunky-dory. Well almost. . . Seems like 40 meters won't tune
around. The VFO is showing something but I knew something was
amiss because I keep hearing the same RTTY signal
Pauli and I have exchanged e-mail many times and it was always a very
pleasant experience. He will be missed.
My condolances to his family.
73,
Don W3FPR
-Original Message-
Folks,
it is with great regret that I announce the passing of Paulí Núñez i
Iglesias, EA3BLQ.
--
No virus
and the regulator will still be in spec
(and OK for use in the K2).
73,
Don W3FPR
-Original Message-
The overall receiver gain of the K2 I just built (serial number
4993) seems
low as compared with my older serial number 315 K2.
The max AGC threshold voltage I can get is 3.82 volts
to solder since the pins do not project through the board. It is
possible that you can have a bad headphone jack, but check the soldering
first.
73,
Don W3FPR
-Original Message-
I was told to report back. Ok, I told you-all before that 40
meters wasn't tuning except on the display
the speaker plug or the external speaker jack.
73,
Don W3FPR
-Original Message-
I can tell now that there is continuity from the speaker jack to
the control
board. I don't get continuity from P3 to P5 on the control board. The
schematic makes it look like a clean shot. When I tried to trace
'470'.
The only thing that is common for 30m and 15m is C73 (also common for 40
meters if the K60XV option is installed). Go to the secondary menu and be
certain the D19 parameter is set to OFF.
You might check for solder splashes in the vicinity of Relay K13.
73,
Don W3FPR
-Original
is the smaller body and looks like a flattened semicircle when viewed
from the top. If the varactors are not correct, the fixed capacitors will
not provide the proper tuning range.
73,
Don W3FPR
-Original Message-
I was doing the VCO voltage readings. I got one voltage out of
range
in the
manual and ignore the way I do it. Yes, the manual is THAT good - it is
even better than it was when you built your last K2.
73,
Don W3FPR
-Original Message-
Elecraftians.
If you were going to build another K2 (and I know
there are many of you who have built quite a few) what
power return line and the K2 ground - the grounds must be properly
isolated as well as the signals if you are to avoid computer noise.
73,
Don W3FPR
-Original Message-
I'm using Ham Radio Deluxe/PSK31 Deluxe software which handles the
PTT, but I still need to connect from the sound
from the battery at all times and when at the home station (most
of the time) the Smartcharger is plugged in and ready to charge the battery
on an 'as-needed' basis. You can see my implementation at my website
http://w3fpr.qrpradio.com or a mirror at www.qsl.net/w3fpr.
Your power supply voltage may
Read the K160RX errata sheet - it should tell you that running CAL PLL on
160 meters is no longer required. The K2 must be on 40 meters to run CAL
PLL.
73,
Don W3FPR
-Original Message-
Hi Group,
I just installed the little 160 board and was going through the
checks. It said to go
according to the Rev E manual that you have and everything
else can be built as instructed in the Rev F manual.
73,
Don W3FPR
-Original Message-
After a 2 year delay (starting a business), I'm finally ready to start
building my K2. It is Rev A kit for which I purchased the Rev B
upgrade
- in fact safety concerns dictate that
any exposed metallic surfaces of any equipment should be grounded.
73,
Don W3FPR
-Original Message-
The posts on this topic mention an isolation transformer to
separate the computer from the PSK audio line. So I might have
missed the boat a little
, but spreading/squeezing the turns is a valid method of
adjustment.
73,
Don W3FPR
-Original Message-
Hi Gang
Im building K2 4988,and on Alignment and test part 2 / VCO
alignment, I could not get L30 adjusted to 6 volts on R30, Started
rechecking my work as per directions,everything was fine,so
0.2 and 0.7 volts. If you get a reading
significantly lower than that, U11 could be bad.
Yes, you will not have much audio with no BFO - maybe just a bit of a
'rushing' noise, but very little.
73,
Don W3FPR
-Original Message-
I'm building K2 #5020 and have no BFO. So far everything
- the run of the mill
wattmeters can only be trusted to 20% of full scale (20 watts possible error
on a 100 watt scale) until proven otherwise.
73,
Don W3FPR
-Original Message-
Hi all,
I am wringing out my KPA100 and have come up with the following
numbers. I
did do the 2 capacitor mod
is
the best way to check it, but then you have to solder on new wires to
re-install it.
73,
Don W3FPR
-Original Message-
I have started carrying out Alignment and Test, Part2 have hit a snag.
It says that the frequency reading in the VCO test should be in the 8 to
10 MHz range. Mine
the K2 reference
oscillator, take a look at my website http://w3fpr.qrpradio.com or the
mirror at http://home.earthlink.net/~w3fpr or the mirror at
www.qsl.net/w3fpr - the K2 Dial Calibration article should give you several
methods of setting the reference accurately, and step 3 (CAL FIL) provides
good
A second K2/100 should do a fine job in a mobile setting, and think of the
fun you will have building that 2nd one. Oh, yes, I assumed that the first
one would remain at the home station.
73,
Don W3FPR
-Original Message-
I'm thinking about getting an HF mobile rig. Don't really want
likely source of the problem is a bad or missed solder joint,
followed closely by an incorrectly placed component - actual component
failures do happen, but they are much further down the list.
73,
Don W3FPR
-Original Message-
I'm new at this, so verify my comments.
On Wed, 3 Aug 2005 20
,
Don W3FPR
-Original Message-
Hi all,
My KPA100 seems to be performing well. However, when I'm in tune at low
power I get about 8 Watts out and with High power tune is
producing about 40
Watts out. I think its supposed to be 2 W and 20 W. What should I do?
Steve, W2MY
in line.
73,
Don W3FPR
-Original Message-
From: Steven Pituch [mailto:[EMAIL PROTECTED]
Sent: Monday, August 08, 2005 8:52 PM
To: [EMAIL PROTECTED]; 'Elecraft Main Group'
Subject: RE: 8W Lo 40W Hi in Tune
Hi Don,
Sorry, I forgot to mention that I have tried using several
- have someone else check it if possible, another pair of eyes can
often spot what yours may overlook.
73,
Don W3FPR
-Original Message-
So far I thought I was doing great. Just to save some time I
thought I would
ask the collective before I go digging for misplaced components and solder
depends on the answer to these questions.
73,
Don W3FPR
-Original Message-
L. B. Cebik, W4RNL, explored the im balance of the end fed
Zepp antenna,
a half wave with open wire feed where one side of the wire connects to
nothing, and the other to the antenna end element.
That would
W3FPR
-Original Message-
On August 8, 2005 07:03 pm, W3FPR - Don Wilhelm wrote:
If your antenna is end fed (like the example of an end fed dipole), the
impdance at the antenna feedpoint will be high, but if the
feedline is an
odd multiple of a 1/4 wave (elecrtical), the impedance
or worse.
73,
Don W3FPR
-Original Message-
I am back on the air (4991) after nearly 20 years. The first thing I
noticed was all the interference on 20 meters. Hetrodynes everywhere!
What's going on?
Took me a while to figure out that it was the computer - not
there 20 years
ago!
So
Roland,
If you want additional information on setting the filters using Spectrogram,
you can find additional information on my website http://w3fpr.qrpradio.com
or the mirror at http://home.earthlink.net/~w3fpr. Look at step 3 (Cal Fil)
of the article on K2 Dial Calibration. There are several
move
the problem down a bit in frequency. The 4700 pf caps are also OK and will
be the ones shipped and recommended.
73,
Don W3FPR
-Original Message-
On Fri Aug 5 23:04:11 2005, Pat N8VW [EMAIL PROTECTED] wrote :
After some more debugging it appears that the ksb2 is causing
one end is full length
and the others are progressively shorter) and it is easier to insert the
leads into the holes.
73,
Don W3FPR
-Original Message-
when it come to RP3 on the main board instead of using the green hookup
wire, is it ok to use cut leads? they are easier to work
the blanking time which some folks have found
works better on the types of noise that they encounter. Look at
http://www.qslnet.de/member/la3za/K2/modAny.html#KNB2 for additional
information.
73,
Don W3FPR
-Original Message-
All the indicators say the noise blanker is functioning, I mean
somewhere between 20 and 50 watts
can be used for the calibration.
73,
Don W3FPR
-Original Message-
Just finished the conversion of my K2 to a K2/100. On SSB, power
seems quite robust, with my wattmeter showing 70~80 watts on voice
peaks (I would have expected about 40~50). On CW, I'm only
' is D9 and the T/R switch
components - arbitrarily replacing the diodes would be a sensible action
because some may work now only to fail later, so it is inexpensive insurance
(1N5711 and 1N4007 diodes are not costly).
73,
Don W3FPR
-Original Message-
I've been thru this and found
? Have you configured the 6 meter transverter correctly? How are
you driving the transverter (from the K60XV output jacks of from the high
power output from the K2/100)? In other words, give us the complete setup
information so we can help - all these things do make a difference.
73,
Don W3FPR
the HC4/HC5 elements, then
you may find one of the other two options meet your needs without an
external preamp box (you may be able to squeeze a preamp inside the K2 if
you are careful with construction and mounting).
73,
Don W3FPR
-Original Message-
I am running the K2 with a Heil HC4/HC5
will provide
you with many more hours of operating pleasure.
73,
Don W3FPR
-Original Message-
I've just purchased a KX1 and I expect to use it on vacations etc.
What is the collective thinking for an outboard 12VDC
rechargeable battery pack I can use with this little gem?
I'm looking
when
aligning your K2 filters whether they be the IF filters for CW and SSB or
the audio filter of the KAF2.
OTOH, the KDSP2 does need to be placed in bypass mode - refer to the KSDP2
manual for the procedure.
73,
Don W3FPR
-Original Message-
I'm feeling dumber than a rock here
are finished, check soldering, then
recheck soldering and when you are finished with that, check the soldering -
that is the most common cause of problems.
73,
Don W3FPR
-Original Message-
I am at the point where I am testing the PLL reference
oscillator. To the
best of my
parameter to 'Hand' temporarily to see
if it works when the K2 is keyed from a long keypress - if it does, you
should be looking carefully at the keying characteristics of your K2 -
perhaps the weight menu setting or the 8R delay parameter, but that is only
another quick guess on my part.
73,
Don W3FPR
controls that feature). Try using CW at the same frequency that you are
successfully transmitting SSB.
73,
Don W3FPR
-Original Message-
TRN1 option is set to On and I can see when setting TRN1 to off
the 6 meter
transverter switches off and 6 meter is not a selectable band anymore
if the voltages at the two points are
substantially different.
73,
Don W3FPR
-Original Message-
Alright, I followed the steps for No (-) supply at U1-8 and this is
what I got:
The oscillator was oscillating at 16.292 mhz
I took the voltage readings of U1.
Pin 1 = 12.32
Pin 2 = 0
Pin
shows that the final audio amplifier IC
is capable of output, the sidetone signal is injected into that IC separate
from the receiver audio path.
What I am really saying is that we need to know which half of the receiver
is at fault here - audio stages or RF/IF, product detector stages.
73,
Don W3FPR
James,
Of course, we have been around this stuff for a while - that provides us
with a BIG advantage.
Glad you found it - looking forward to bigger and better things after you
get that KIO2 up and running.
73,
Don W3FPR
-Original Message-
Wow you guys are good! Heh, can't believe I
may have changed with the next one off the kitting line.
73,
Don W3FPR
-Original Message-
on page 51 locating the following capicators c71 (82) and c73 (47) there
is a 820 and an 4.7and c 182 (181) there is a 182
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus
on
the K2, are you not? If you are making judgements with the KPA100 laying on
the bench beside the K2, be aware that the enclosure provided by the K2/100
adds a LOT to the quality of the speaker sound - the base K2 speaker sounds
a bit ' tinny' when the cover is removed from the K2.
73,
Don W3FPR
to attempt to parallel 2 supplies, I would check that the
design (mainly the protection circuits) allows them to work together
properly and definitely would NOT attempt to parallel 2 different supplies.
73,
Don W3FPR
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED
,
Don W3FPR
-Original Message-
Any thoughts on this one: Today I hooked up an antenna switch so
I could run the K2/100 and the ICOM 706 and switch between them
and use one or the other when I want to. Both radios run off the
same Astron SS-25 power supply. When I have the 706 turned
job?
The RX ant will not be active until you turn it on in the K2 menu.
73,
Don W3FPR
-Original Message-
If I didnt want to use the 160 rx connector, could you leave w1 in
place with no ill effect?
George NE2I
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus
there, the
problem is in the speaker connector or wire. You can check the wire with an
ohmmeter.
73,
Don W3FPR
-Original Message-
Hi,
My K2 (#4979) worked just fine untill yesterday. After setting L34 for
the best
signal-to-noise ratio and placing the top cover back onto the chassis I
have their own
limitations. My personal opinion is that the N4PY software offers a
smoother interface and adds several control features that are quite useful.
73,
Don W3FPR
-Original Message-
I'm looking for software to drive the K2. I'm primarily interested in
something that would
http://w3fpr.qrpradio.com ot the mirror at
http://home.earthlink.net/~w3fpr - look on the left sidebar for the K2 Dila
Calibration article - it gives information about accurately setting the K2
reference oscillator and Step 3 provides details on how to use Spectrogram
for aligning the filters.
73
of what does
work and what doesn't work to home in on the problem area. This is strange
problem - I (and several others) have followed the K2 since its inception
and this is the first time I have seen a report of the behavior you are
describing.
73,
Don W3FPR
-Original Message-
Many thanks
with coax, put
the balun at the entry point) - the balun should be a current type to handle
the varying reactance levels - a voltage balun is prone to saturation.
73,
Don W3FPR
-Original Message-
I could use a suggestion or twoI live in a very congested
areamy house
is 11 foot
to on with no receive antenna connected.
73,
Don W3FPR
-Original Message-
My K2/100 works great and it's a great DX machine. One thing
I've noticed however, is that
the recovered audio is different on different bands. On certain
bands ( higher than 20M?) I
need to have the AF gain waaay up
to
speed up the amplifier switching than to install the CW PTT. Fast vacuum
relays are available surplus, for example a pair of Kilovac HC-1 relays will
switch your linear in 6 ms. See http://www.mgs4u.com/relay.htm for one
source or do a google search for other sources.
73,
Don W3FPR
is not the best, but it is readable - you will need to have a DjVu
Reader to open the file.
73,
Don W3FPR
-Original Message-
I have a classic Electro-Voice 664 microphone. Does anyone use one with
their K2 and if so, what did you have to do to get it to play properly.
73
Tom
K6CT
--
No virus
install that option because the VFO Range Selection
mechanism is modified although you may want to install the 2 headers, but I
see no gain in doing so because the K2 heat sink must be removed to install
the K60XV and adding the headers at that time is just another easy step.
73,
Don W3FPR
, the power output may be
real, but the problem is the feedpoint impedance of the antenna and not the
K2.
Please povide ua with more information of what does and does not work, if we
are to offer more specific assistance.
73,
Don W3FPR
-Original Message-
I built and installed the 160 meter
is working - it may be
related, but right now it is not informative.
We can do the detail de-bugging off-reflector and then you can report the
results after it is cured.
73,
Don W3FPR
-Original Message-
From: Don Clark [mailto:[EMAIL PROTECTED]
Sent: Friday, August 26, 2005 3:03 PM
George,
Perhaps I can help - do you want to tackle the KIO2 problem or the KSB2
problem first? They are 2 seaparate problems, so best not to mix them, it
will only cause confusion.
73,
Don W3FPR
-Original Message-
While working on the ki02 the k2 transmitted on its own and smoked
Voltage). If you get to this point and it still
doesn't work, send us another note and we will proceed from there.
73,
Don W3FPR
-Original Message-
I started to do the 40meter tx power test when I set the
control for 2.0 watts, I get 2 watts out. When I set it for 5
watts, I get 5
with the KSB2 removed? Check both during
transmit and receive.
73,
Don W3FPR
-Original Message-
Still chasing the problem with the SSB board.
1. Rig works fine with the SSB option removed and jumpers reinstalled.
2. 8V is present on pin 10 P1.
3. C42 was left out by my mistake, installed.
4
situations do exist, and they are discussed here
too.
73,
Don W3FPR
-Original Message-
I am now confused by the existence of two different mod's with the same
goal.
It makes perfect sense to me that I should not be wasting Tx
energy on audio
frequencies as low as 20Hz. Beyond
- the voltage drop at load will be less - a 15 amp circuit
could use #14 wire, but I recommend using #12 (#10 for 20 amp) - of course
if the run from the breaker panel is short, the voltage drop will be small
even with the normally rated wire.
73,
Don W3FPR
-Original Message-
I assume
built is
being used successfully as a mobile - in an 18 wheeler - check the QRZ.com
listing for W4GNS if you have any doubts.
73,
Don W3FPR
-Original Message-
As I build my second K2, I want to try to measure the inductance of the
toroids with my MFJ-259. The MFJ manual has instructions
spacing, and that
may show up as an apparent change in 'inductance' on many meters because
they do measure inductance at a specific frequency. The best way I can
think of to prove or disprove it would be to measure the time constant in an
LR series circuit.
73,
Don W3FPR
-Original Message
.
73,
Don W3FPR
-Original Message-
Eric, KE6US wrote:
I don't have your experience or background, Ron, but the L-meter is
measuring inductance indirectly and ignoring the presence of distributed
capacitance. Maybe it isn't as negligible at the frequency of the meter as
you think
will display this self-shielding effect if it is wound with perfectly even
spacing between the turns, but if the spacing is altered, more flux leakage
will exist and the inductance will change because the effective permeability
will be modified.
73,
Don W3FPR
-Original Message-
Yes, I think
Bill,
As stated in the change documentation, the limiting factor is the power
output on 10 meters. Change it to a higher value and see what happens.
73,
Don W3FPR
-Original Message-
In setting up to use the K2/100 with my newly acquired AL-80A, I
found that the K2/100 power output
501 - 600 of 652 matches
Mail list logo
