Steve,
Is this something that just occurred - in other words, did the mic work OK
before? or has ot a;ways been that way.
If it has never worked well for you, I need to ask - Did you add the 5.6k
resistor between pins 1 and 6 on the back of the mic jack properly? And set
the jumpers on the mic
Tom,
That is not normal.
First see if the problem is with your CW filter itself or it is in the
filter switching on the KSB2 board. Proceed as follows:
If you have a steady signal source of known frequency and amplitude, tune
that signal on the K2, noting the s-meter or audio level for both
Robert (and Brian),
If the current is high during receive periods as well as transmit, check
first to see if R45 is hot. If it is, then your problem is likely a faulty
Q5. You can confirm the condition that I suspect by measuring the voltage
on the 8T signal line during receive periods (you can
George,
A#1: There is nothing wrong with 750 Hz if that suits your ears better.
Most of us feel that is too high for comfort. In fact, that pitch was
'forced' on us by earlier transceivers that tried to use the same BFO
crystal for both SSB and CW. Thankfully, the K2 and K1 give us a choice.
Martin,
To be a Zepp antenna, the parallel feedline would have to be an odd multiple
of a quarter wavelength, and that quarter wave a;so serves in place of a
'counterpoise wire', so your 15 feet is a futile effort in that regard.
Just as well to use a single wire for the 15 feet to the end (and
Mike,
Unless you are dead set on doing that in a hardware interface, try Ham Radio
Deluxe or the N4PY software - what you want to achieve is already programmed
into them (or can be customized for that function).
If you wish to create a hardware interface, I might suggest that the easiest
path is
Paul,
With PSK31 (or any of the soundcard digital modes), the normal up to 30 Hz
shift of tones when switching from filter to filter can be bothersome. This
small shift is inherent in the digital control of the K2 VFO and BFO
frequencies, and can be expected.
The 'cure' is not in the K2, but in
Chas,
The QST View images are .TIF files, so whatever program you have on your
computer that is associated with TIF files is the one that will be used.
You can change the associatiation from Windows Explorer - click Tools,
select Folder Options, and in the box that opens, select the File Types
Ken,
Try any business that offers tools and supplies for Stained Glass work.
73,
Don W3FPR
-Original Message-
Where can I buy a small block of sal ammoniac to clean my
soldering tip with?
TNX es 73,
Ken, WA4GHY
--
No virus found in this outgoing message.
Checked by
Ingo already provided the answer if you were looking for the front panel
layout and artwork, but if what you meant was the FP board itself, you can
find scans of most all the Elecraft boards at Tom Hammond's website
(www.n0ss.net).
73,
Don W3FPR
-Original Message-
I am looking for a
Larry,
You did it right. The recommended 6 volts at 4 MHz is just a starting
point, and per the non-K60XV K2 instructions, it could be as high as 7 volts
if that is required to bring everything else into range.
When the K60XV is added, the extreme points are normally 5.300 MHz (which
will
Leigh,
I don't think that applies in this particular case, it is however good
information to pass along for those with a setup like yours.
Phil said he was using the transverter interface for output, and I assume
that means the K60XV output.
The K60XV has its own source for VRFDET, so it would
Phil,
There is no ALC input to the K2, and normally it is not needed. There is
ALC internally in the K2 to keep the output level at whatever power is
selected on the POWER knob.
Adjust the output level of the K2 to the proper level to drive the
transverter to full output, and the K2 will
Brian,
You did change C71 to 120 pF did you not? C73 is also a suspect, check that
it is 47 pf.
What voltage do you get at 4 MHz? It will normally be in the 6 to 7 volt
range when everything is proper. If relay K13 is properly operating and the
capacitors are the correct value, things should
Kieth,
The T1 tuner is the only one that might do that current job for you.
Look at http://www.elecraft.com/T1/T1_FAQ1.htm for the specifics.
The KAT2 and KAT100 must have a K2 attached to operate, and they cannot be
remotely located.
73,
Don W3FPR
-Original Message-
I'm interested
Folks,
A Split/RIT/XIT indicator can (and has) been added to the K2 as a mod. If
you want a non-Elecraft implementation, you can do it. Look at Tom
Hammond's website www.n0ss.net near the bottom, and/or look at the LA3ZA
Unofficial list of mods for the K2 at
Folks,
I just added a hi-current LED to my K2 as a SPLIT/RIT/XIT indicator. Adding
the emitter follower transistor was a cinch. I used a 2N2907 PNP
transistor, connected the base where the cathode of the lo-cur LED would
have been, connected the collector where the anode of the lo-cur LED was
Norm,
Glue, yes, but SuperGlue on rubber does not work very well - the superglue
hardens (becomes inflexible) and the rubber must still flex, so it will come
off in time. I built a K2 recently and found the pads reluctant to stick
too - so maybe Elecraft needs to monitor their pad vendor's
Sorry OM,
There are many messages here on the reflector each day, and in total I
likely review over 100 messages a day from various sources. While I try to
look at each message and prepare an intelligent response, I am unable to
take the time to scroll down, find the proper tic-marks indicating
ps030805 (aka noname, nocall),
You should 'standardize' the line length before you try side-posting. The
following message is very confusing.
The key to top posting is to reply in complete, logical sentences - anything
else produces garbage. For those who are not willing to construct responses
Paul,
Congratulations on your K2 purchase.
The AF Gain pot noise first (it is the easiest). If your serial number is
less than 3000, you should see if the alternative AF Gain wiring mod has
been installed - if not, I suggest installing it first. In the process, you
may want to replace the AF
Craig,
Build the KPA100 first (you can use it immediately with a dummy load or a
resonant antenna or any pre-tuned antenna).
If you build the KAT100 first, you will not be able to test it nor align the
wattmeter until you complete the KPA100 anyway, so it will just sit there
waiting. It should
Bob,
Congratulations on your 2nd K2.
On the screw thing, yes steel screws in aluminum can be difficult in some
circumstances - the aluminum conforms very well to the steel screw threads.
The best preventative measure I have found is to put a drop of oil (NOT
WD40!!! - it is NOT a long term
The D 104 mic (unamplified version) needs to look into a very high impedance
(50k ohms or greater). That mic was developed in the days of vacuum tubes
with mic amplifier input inpedances in the 50k to 1 megohm range.
Modern transceivers present an impedance of something close ot 600 ohms at
the
While the G5RV has a lot of advocates for multiband use, it works much
better if you bring the parallel feedline all the way to the tuner. When
used for multiband, with coax and the matching section, you will likely find
a higher than desirable SWR on the coax except on 20 meters. I have found
Roger,
The bottom line is that you have to end up with one lockwasher between the
standoff and the board. It matters not which end of the standoff that
occurs on - the lockwasher adds a bit more length to the standoff and it is
sometimes needed to assure adequate clearance for the board above
Ray,
You may have a situation with a PLL range that is a bit on the narrow side.
You could try shifting the entire VCO range (adjust L30 while observing the
voltage on R30) to see if you can get the 160 meter band within range too -
I would try that first.
If the above fails, you can adjust the
Bob,
To answer your power output discrepancy question first - the wattmeter in
the KPA100 must be properly calibrated before it will read correctly. If
you can trust the calibration of your LDG, you can set the KPA100 wattmeter
to match that reading. The instructions are in the manual.
BUT,
Jean-Francois,
If you are switching the antenna from one transceiver to another by some
manual method (relays or a switch), I should think that there should be
adequate isolation if you were to switch in either a 50 ohm dummy load on
the unused K2 or simply a short across the antenna terminals if
Jess,
The real answer to your problem is that the KPA100 wattmeter is not
producing voltage onto the VRFDET line back to the base K2.
Look at the schematic sheet 1 of 2 and you will find the wattmeter and the
circuits that develop the VRFDET signal on the upper right side of that
diagram. Check
The first thing that occurs to me is that the single turn of wire through
the center of T1 may be missing. The second thing is that T1 itself may not
be properly wound or properly soldered. Check that the proper color wire is
inserted into the proper holes (the color of the wire in hole 2 should
Joseph,
You may want to check out the N4PY software http://www.ralabs.com/n4py/. It
does include a bandscan if you activate it. Much less expensive than a
hardware bandscaning device.
73,
Don W3FPR
-Original Message-
What I would _really_ love to build or buy from elecraft would be
Hi Folks,
I just ordered some Multicore solder M00979 .020 63/37 370 Flux. It used
to be Ersin Multicore, but now is owned by Heakel-Loctite.
I bought 20 rolls, and will have 15 or 16 to offer to folks here on the
reflector if you would like to stock up. The industry is moving rapidly to
Sorry folks, but within less than an hour, I have received 14 requests, and
several are for multiple rolls - so they are all spoken for.
If I have any more requests, they will have to go on a wait list in case one
or more folks who said they wanted a roll back out later.
73,
Don W3FPR
--
No
Sjoerd,
Check the errata sheet with the K160RX. We used to do CAL PLL on each band,
but with Rev 2 firmware and above, CAL PLL is done only on 40 meters. There
is no need to run CAL PLL when installing the K160RX.
73,
Don W3FPR
-Original Message-
First of all: My K2 is alive :-)
The K2 is no more sensitive the RF hash from a power supply (or other noise
producing devices) than other radios.
BUT - since the K2 is more sensitive, and can receive lower level signals of
any kind, yes it will hear even weaker RF signals - and if the RF hash from
a power supply can reach your
Do any of the relays operate (click), or is the problem only with the ones
on the L-C board?
If none of them operate, check that the MCU is properly seated in its socket
with no pins either sticking out to the side of the socket or bent under
(you should remove the MCU to check for bent under
Steve,
I have not dealt specifically with the backlight assembly, but I have cut
many thermoplastics, ranging from small, thin pieces to 4 x 8 sheets of
thicker material.
I have cut them on my tablesaw, bandsaw, compound sliding miter saw, and a
variety of handtools - usually saws. There is one
Folks,
I know this has been discussed before and I am certain someone reported
success, but I can't find it. My memory is good, but my retrieval system
currently stinks.
Has anyone successfully put a switching power supply and a KAT100 in an EC2
enclosure? If so, what power supply was used?
Dan,
Actually, in my experience, the tuner could care less whether the load is
balanced or unbalanced, it will just do its best job of matching the
impedance it sees regardless of balance.
OTOH, if you are concerned about radiation patterns, or 'RF-in-the-shack',
it would be prudent to install a
Jack,
I don't know the specs for that Sears charger, but many of those designed
for automotive batteries are nothing more than a cheap power supply. A gel
cell can be maintained at a 'float voltage' level of about 13.8 volts at its
terminals and will do well - many security systems and small
volt SLA), and the charging continues until the current drops
to a small value - then stage 3 begins which limits the voltage to 13.8
volts (trickle charge value).
73,
Don W3FPR
-Original Message-
W3FPR - Don Wilhelm wrote:
Of course, an even better system is to use a 3 stage charge
Paul,
Those particular options have no effect on each other and can be installed
in whatever order you might choose. Pick whichever seems easiest (or more
important) to you for the first one.
73,
Don W3FPR
-Original Message-
Hello allI have acquired the KDsp2, KNB2 and
KPA100
I am not familiar with the MFJ 434, so if someone with better information
than my assumptions has better information, ignore my contribution.
First, I will assume that you would want to have the voice keyer and the MD2
both connected to the K2 at the same time.
To me, that should mean that I
Brian,
If I understand your wording correctly, no matter whhere you set the power
level 10 watts, the K2 output is 14 to 15 watts, and if the power level is
set for 10 watts the output is 100 watts (or more). (Should I have
misunderstood, ignore the rest.)
The normal cause of that behavior is
Matt,
At this point, I don't think anything is wrong with your AGC circuit.
Re-check the TEST 3 readings with the RF Gain set to MAX and I believe you
will see readings a bit closer to the Expected values (I think a step is
missing here to tell you to set the RF Gain to max). The 'key' is that
Lee,
I'm not in Seattle, but here near the other coast - BUT perhaps I can help
with your K2 calibration. Surf to my website http://w3fpr.qrprqdio.com or
the mirror at http://home.earthlink.net/~w3fpr and look at the article there
on K2 Dial Calibration.
Yes there is a possibility that it will
- Don Wilhelm [mailto:[EMAIL PROTECTED]
Sent: Monday, August 29, 2005 9:22 PM
To: Ron D'Eau Claire; elecraft@mailman.qth.net
Subject: RE: [Elecraft] OT: Effect of Compression and
ExpansionontheInductanceof Toroids?
Ron,
I have the same inductance meter, and it does a good job because
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
Darrell,
There may be a small apparent change in inductance when adjusting the turns
spacing of a toroid, but it would only be a small percentage - look at the
formulas for a toroid inductor to verify that fact - there is no term for
the turns spacing, and the diameter of the toroid fixes the
Ron,
I have the same inductance meter, and it does a good job because it does
measure using the LR time constant rather than frequency, but 'physics is
physics', and with a true toroidal inductor, there is still no dependency on
the turns spacing (the math says so).
Now, for the practical side
Bob,
First thing to look at is the power supply - Tap teh DISPLAY button and
attempt to transmit at full power - if the voltage sags drastically, check
the power supply, the connecting cable and the terminations for good
connections, adequate cable size (16 gauge or larger).
If the voltage stays
Jess,
I suggest that you solve the voltage regulator problem first - it should be
the easiest and several other problems may go away once that is corrected.
The 6 volt regulator on the KSB2 board connects to C46, pin 8 of U4, pins 3
and 7 of U2, pin 8 of U3, and pin 20 of U1 - check all these
Fran,
I will not say that one is better than the other, but Jim's change only
deals with the mic input itself, while Stewart's change also deals with the
internal behavior of the Speech Compressor chip by changing C31 and resricts
the low frequency fed to the Balanced Modulator by the Speech
Lynn,
Go ahead with the 240 volt installation. Any amp that develops that much
power should rightfully be powered from a 240 volt circuit. Although it may
run on 120 volts, it will draw a significant ampunt of current and may even
exceed the rating of a 120 volt household circuit - the full
Darrell,
Caution, The toroids should be wound as instructed - you may measure them,
but please do not try to make the inductance equal that indicated in the
manual/schematic because those inductance values are either what was
measured on someone else's inductance meter, or they are approximate
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
- Don Wilhelm [EMAIL PROTECTED]
To: Don Clark [EMAIL PROTECTED]; elecraft@mailman.qth.net
Sent: Friday, August 26, 2005 7:42 AM
Subject: RE: [Elecraft] 160 meter low transmit
Don,
With that information, I would suspect the bandpass filter (even if it
receives 160 meters fine
Bruce,
I suggest that you download the manuals (or use your existing ones) for each
option and review the installation steps. The parts lists also show the
part numbers for the headers and standoffs and other parts required. The
'short' list is as follows:
K160RX - header, standoff and 3
Don,
It would appear that you may have something wrong in the 160 meter low pass
filter. Count the turns on the toroids, and check the capacitors for the
correct values.
You are measuring the power output with a good 50 ohm dummy load, are you
not? If you are attempting to feed an antenna, the
-Original Message-
On Jul 13, 2005, at 11:14 AM, W3FPR - Don Wilhelm wrote:
Even if you
have a linear that you must switch in-line to transmit, the K2/100
amplifier
keying output (or the add-on K2 amplifier keying partial kit for
the QRP K2)
will properly switch any amplifier
Tom,
I was able to find some info on the EV 664 mic and found it is capable of
being configured for 'high impedance' or 'low impedance', but I could find
no reference for how low is low nor how high is high, and I found no mention
of the output level. You could just try the low impedance
Thom,
For operation on such a small footprint, I would think th ebest solution
would be a vertical - especially a vertical dipole because it should not
require radials for proper operation. There are several multiband verticals
available, but for single band use, a half wave of aluminum tubing
John,
With the sunspot cycle at its present low state, that may just be normal. I
have not heard many signals on bands higher than 20 meters lately except for
an occasional band opening.
OTOH, if you have taken the lack of viable signals on the higher bands onto
proper account, you may have
Craig,
For K2 rig control software, I am familiar with 2 - Ham Radio Deluxe which
is free for download and includes PSK31 (http://hrd.ham-radio.ch/), and Carl
Morescheski's N4PY software (http://www.ralabs.com/n4py/) which is not free,
but does provide CW support and supports the K1EL Winkey.
Merlin,
I believe a thorough filter alignment using Spectrogram to see the
de-modulated audio spectrum will straighten things around for you. It is
CAL FIL that you need to run, not CAL PLL,
If you are not familiar with using Spectrogram for the K2 filter alignment,
take a look at my webpage
Merlin,
First, yes, be certain RIT and XIT are truly not active, then see if the
VBFO signal changes voltage (be certain you are in SSB mode) when switching
from transmit to receive - monitor control board U10 pin 14.
If it does change, I would venture a guess that the firmware THINKS either
Rolf,
It sounds to me like you have a malfunctioning connector - likely the one on
the end of the speaker cable. If the terminals were malformed during the
assembly process, they are high on the list of suspects.
It is also possible that the headphone jack has failed - the contact that
provides
Jonathan,
We need to understand your setup with the new switch included a bit better
before giving a proper answer, but I will 'go out on a limb' and make some
assumptions to see if it provides you with a quick answer.
Where did you put the switch? If it is between the K2/100 and the KAT100,
George,
Sorry, but no - the entire K160RX will not work, and that means no RF output
on 160 meters even if the K2 says it is operating on 160 meters.
If you do not wish to use the RX jack, just leave the BNC connector off -
but then, it is not hard to put it on, so why not just do the complete
Stan,
If the voltages are ALWAYS exactly the same, you could be OK, but if the
voltage sags on either supply, the one with the higher voltage will try to
feed into the lower voltage supply just as if it were another load. What
happens next depends on the exact power supply design. I would
James,
All those voltages look OK to me. The voltage on pin 11 is dependent on the
state of the signal at pin 6. If you wish to test it, pull pin 6 to a
negative level (jumper from pin 8 to 6) and you should see pin 11 go to 5
volts - a positive voltage on pin 6 should produce a 0 volt signal
Jess,
Where and how you start depends on what test equipment you have available.
To begin, we need to know whether the problem is in the audio stages or in
the remainder of the receiver.
Do you have a 'scope available? How about an audio signal generator? Do
you have a computer with a sound
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
You would do well to review something like the ARRL Handbook 'Component
Data' section to become familiar with the various markings used for
capacitors.
The cap marked 820 should be 82 pf, the disc ceramic marked 4.7 is 4.7pf,
the cap marked 181 is 180 pf and the one marked 182 is 1800 pf. A 47
Craig,
Certainly - just in case the speaker frame is bent, take the speaker from
the QRP top cover and mount it in the KPA100 - it should sound the same -
the only difference is the wires, and wires do not add distortion.
OTOH, you are judging the sound quality with the KPA100 fully in place on
Rob,
Assuming you have all the K2 trn 1 menu parameters set correctly and the
transverter properly configured (and you likely have them correct or the
transverter would not work in SSB mode), you have a mystery for me. The
Transverter does not know (and should not know) whether the RF is being
Rob,
Just as another wild guess - I need to ask if the IF frequency you are
attempting to transmit on is lower than 28 MHz? (i.e. are you attempting to
transmit CW below 50 MHz?) If so, that would place the signal outside the
ham band and the K2 may have no output at that frequency (the firmware
Mike,
Please clarify why one would want to turn off SSB when doing filter
alignment. It is normal to align the SSB filters as well as the CW filters
when doing a complete job. If you have the KAF2 installed, you may want to
turn off the low pass filter so it will not roll off the high frequency
Jess,
One of the likely problems may be a solder bridge on the thermistor board
itself. First check to see that the voltage at U6 pin 5 is 4 volts - if it
is substantially different than 4 volts, you for sure have a poblem on the
thermistor board.
The PLL temperature compensation keeps the PLL
I routinely use cut off component leads on the thermistor board - simply
because they are laying there in the bench. If you stick them into a black
foam block, you can get 3 or 4 aligned at one time before soldering (it is
just faster that way.
Another hint is to cut the 8 leads at an angle (so
Roland,
The tightness of the toroid windings will make no difference - the important
thing with toroids is that they have the correct number of turns, and not
much else matters - even the winding direction does not matter electrically.
The K2 noise blanker is more effective on impulse types of
Web,
Are you referring to the KPA100 internal wattmeter readings or some external
wattmeter? If it is an external wattmeter, do you know its accuracy? Have
you calibrated it?
Several possibilities occur to me - 1) You are driving an antenna with high
SWR and the KPA100 is reducing power
Re-check the displayed power please - if it says 0.2 watts instead of 2
watts, there is actually no power at all - the 0.2 watt indication is
residual in the power measuring circuits (a.k.a. noise) and at a glance it
is easy to interpret as 2 watts.
As Gregg stated, the most likely first 'attack'
Rob,
Please clarify - there is no PTT relay in the K2/100, all transmit/receive
switching is electronic, so there is no relay clicking involved. Is the
relay clicking from the K2/100 or from the transverter?
Do you have power output from the KPA100 without the 6 meter transverter
connected?
Jeff,
The Heil HC4 and HC5 elements have 6 to 10 dB less output than other dynamic
mics - that doesn't make them bad, it is just a fact of life.
The other fact of life is that the K2 does not have a mic gain control
(other than SSBA parameter in the menu), and it just does not have
sufficient
Ralph,
The proper answer is -- it all depends on your definition of 'intermittent'
and whether you include both weekends in your 'week' of vacation time.
Seriously, all is a compromise - if you are looking for lightweight battery
power, you can use the internal AA Size batteries, but for an
Pat,
A note to mailto:[EMAIL PROTECTED] should get 2 new non-inductive resistors
on their way to you when Scott and Brian get back to work on Monday.
If you have not been updated on the information, the capacitor change does
not do the trick entirely, the increased value caps are OK, but simply
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
Tom,
The worst offender is usually the CRT type monitors - I replaced the monitor
on my own and the XYL's computers with an LCD display and most of the
interference went away.
Yes, a computer is an 'essential' element in the shack today, so it is a
device that must be dealt with for better or
Steve,
How are you determining the power output? Is the 8 watts and the 40 watts
what is indicated on the K2 or what is indicated on an external wattmeter.
If it is an external wattmeter, then the answer is easy - calibrate the
forward power pot in the KPA100.
OTOH, if the power indication is
Wattmeters after
the KPA100 and before the KAT100, and they all pretty much agree. I will
calibrate the pot as you suggest. Thanks.
Steve, W2MY
-Original Message-
From: W3FPR - Don Wilhelm [mailto:[EMAIL PROTECTED]
Sent: Monday, August 08, 2005 7:33 PM
To: Steven Pituch; 'Elecraft Main
Jess,
In general, if it worked once, the firmware is likley not to blame. Check
the soldering on the front panel carefully - especially pin 1 of U1 - you
can solder it from the socket side if you cut away a bit of the plastic.
The normal reuslt of an unsoldered connection is that it works
Darrell,
It all depends on the electrical length to the feedline at the frequency of
operation. Sorry, but no better answer exists.
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
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
Eric,
Once the proper values are written into the EEPROM by the CAL PLL and CAL
FIL processes, they should remain stable unless the PLL reference oscillator
frequency changes substantially (similarly the BFO Frequency).
The most important thing to assure accuracy is to carefully set the K2
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
Matt,
You are not incorrect, but I thought I might clarify - the real control over
8R and 8T is done on the control board from the RX and TX outputs from the
microprocessor - which drives the gates of Q3 and Q4, and in turn turns Q1
and Q2 on and off providing the 8R and 8T lines at the correct
Dave,
Your best chance is to look carefully at the thermistor board - such
problems usually originate there - it is easy to create a solder bridge on
that small board. You can often spot it by removing the front panel and
control board and peek at the solder side of the board - if not, removal
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
1 - 100 of 612 matches
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