[Elecraft] AF-1 audio filter

2010-12-01 Thread L. D. Ingram
Hi,

With all the chatter about the AF-1 audio filter lately I thought i 
would post how I mounted the AF1 and an audio amplifier in a small 
case to use with my K2. If anyone is interested you can find the 
pictures and comments on my web site at lawrenceingram.com. Click on 
the Ham Radio tab and then select the AF-1 article.

73,

Larry Ingram AG4NN

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Re: [Elecraft] AF-1 audio filter

2010-12-01 Thread L. D. Ingram
Ron,

Thanks for the complement; I enjoy seeing what I can do to make 
something fit my needs.

I don't have a particularly noisy site but I have the radio sitting 
on a shelf with another shelf just above it which makes the top 
firing speaker in the K2 more difficult to hear. So I added the 
amplifier to connect to a front facing speaker. I probably don't need 
the extra audio level, but added it because I don't know what I might 
connect it to in the future.

73,

Larry AG4NN

At 12:29 PM 12/1/2010, you wrote:
Very nice execution Larry!

I don't use an outboard audio amp with my AF1. The built-in LM386 amp in the
AF1 drives a pair of outboard speakers for me with good volume. Do you have
an unusually noisy environment?

73,

Ron AC7AC


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Re: [Elecraft] AF-1 audio filter

2010-12-01 Thread L. D. Ingram
Hisaahi,

I have used both and find both useful. The thing I like about the 
AF-1 is the ability to shift the peak frequency.

73,

Larry Ingram AG4NN

At 12:34 PM 12/1/2010, you wrote:
I wasn't paying enough attention lately. Does anyone have a comparison
of the audio filter in the AF-1 vs the one in the KAF2? I've wanted a
low pass filter for a while, and after seeing a youtube video of the
AF-1 I think that's what I'm looking for.

On Wed, 1 Dec 2010, Ron D'Eau Claire wrote:

Very nice execution Larry!

I don't use an outboard audio amp with my AF1. The built-in LM386 amp in the
AF1 drives a pair of outboard speakers for me with good volume. Do you have
an unusually noisy environment?

73,

Ron AC7AC


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[Elecraft] K3 - ATU Tune

2010-10-29 Thread L. D. Ingram
Hi,

Something curious has happened to my K3 SN 3975 - when I tap the ATU 
Tune button the power out shown on an external power meter is full 
power, a little over 100W. The K3 power out indicator also kicks up 
to full power. I have the unit set to 50W and when I key it normally 
(CW) it shows 50W on both the external and internal meters. The SWR is fine.

Any thoughts on anything I might have done to cause this?

Larry Ingram  AG4NN

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Re: [Elecraft] K3 - ATU Tune

2010-10-29 Thread L. D. Ingram
Hi again,

Stan KR7C hit it on the head, the external meter is autoranging and 
the output is 10W not 100 (red face on this).

Thanks Stan and others who answered.

Larry Ingram  AG4NN

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Re: [Elecraft] One more question about CW operation

2010-05-31 Thread L. D. Ingram
Hi Alexey,

I am one that uses a straight key - thats the way I started and 
although I have played with paddles and bugs I always seem to revert 
to the old navy straight key I have had since 1955.

Larry Ingram  AG4NN

At 09:54 AM 5/31/2010, you wrote:
Of all fine folks using Elecraft
transceivers, do you still use straight keys or bugs? Or are you using
paddles and keyers all the time?


--
Alexey Kats (neko)
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Re: [Elecraft] W1: Can you remote the readout lightbars?

2010-05-28 Thread L. D. Ingram
Jim,

Yes, I did it some time ago.

You can see pictures of what I did on my web site www.lawrenceingram.com
Let me know if you have any questions

73,

Larry Ingram  AG4NN

At 02:08 PM 5/28/2010, you wrote:
elecraft@mailman.qth.net
Does anyone know if the W1 wattmeter LED lightbar readouts can be 
physically and electrically remoted from the rest of the circuit 
board, e.g. say, cut the board and use wire flat ribbon?  Anyone 
tried this?  Doing so would make mounting the board in an enclosure 
so much easier.  Jim Robbins, N1JR

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Re: [Elecraft] K2 new builder

2010-03-12 Thread L. D. Ingram
Fri Mar 12 2010 at 16:53:21 EST George Gates (W2BPI) wrote ...

I will be starting to build a K2 soon. ... Anything I should look out for or
any tips?


Hi George,

 If you've not yet visited http://www.unpcbs.com/, then that would be my
first suggestion.

73,
Gary  KI4GGX  (unpcbs.com webmaster)
K2 #2724


George,

I agree with Gary. The last K2 I built I installed all of the rework 
eliminators and just recently I added several modules - it was 
essentially plug and play rather than having to unsolder and solder 
to add the modules.

73,

Larry  Ingram AG4NN

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[Elecraft] K2/100 for sale

2010-02-27 Thread L. D. Ingram
Hi,

The K2/100 is sold.

73,

Larry Ingram AG4NN

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[Elecraft] K2/100 for sale

2010-02-26 Thread L. D. Ingram
Well my indulgence at the Orlando hamfest arrived yesterday - a new K3.

This means I need to find a new home for one of my K2s - or my wife 
may decide to find a new home for me.

I have a K2/100 plus the external KAT100 for sale.  The K2 serial 
number is 6405. The KPA100 is older but all the upgrades have been installed.

The KSB2, KNB2 and K60XV are all installed in the K2. The other 
places for accessories have the Rework eliminators installed for easy 
upgrading.

Total cost for all this, including shipping was around $1,600.00. I 
am asking $1,100 for the complete set and will pay the shipping in 
the continental US.

I have pictures of both the inside and outside of all units and will 
be glad to email them to anyone who is interested.

Please contact me off list via the email address above.

Larry Ingram  AG4NN

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[Elecraft] K2 for sale - addendum

2010-02-26 Thread L. D. Ingram
I forgot to say that all the cables and manuals are included as well 
as the K2 QRP top.

Larry Ingram  AG4NN

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Re: [Elecraft] who owns more than one K2, and why?

2009-05-12 Thread L. D. Ingram
At 08:50 AM 5/12/2009, you wrote:
Obviously this kit is made to be modular (add a component, remove a
component, etc.), but who has decided to own more than one K2--and
why

Hi John,

I have 2 K2s. I use my K2/100 for HF work (mostly CW) and the other 
one is the IF for my 6 and 2 meter transverters (also Elecraft). This 
way I can monitor for VHF band openings while I am enjoying a ragchew 
on one of the lower bands.

Larry Ingram  AG4NN

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[Elecraft] K2

2008-11-28 Thread L. D. Ingram


Hi,

I received a note from Don W3FPR and Hank  K8DD about the problem I 
posted the other day where even when I just tapped the band up button 
on my recently built K2 it would sometimes go into the RCL mode.


First I want to say thanks for the suggestions and then tell you what 
I found in case someone else has this trouble. It was the usual, a 
bad solder joint, but not where you would expect it. What happened is 
U2 pin13 was left floating because the trace from RP1 went through 
the common terminals on the AGC switch and one of those was not 
making a good connection. Once I got voltage back on pin 13 of U2 
everything worked. The puzzling thing is why it worked most of the 
time with that pin floating.


Thanks again.

Larry Ingram  AG4NN


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[Elecraft] K2

2008-11-25 Thread L. D. Ingram

Hi,

I recently build my second K2 sn 06405. Receiver and transmitter are 
working fine and I have enjoyed a number of QSOs on 40, 30 and 20 
meters and the rest of the bands have been checked out with a signal 
generator and transmitting into a dummy load.


However, occasionally when I go to switch bands with the up (+) key 
it will go into the RCL mode instead. After the first time I was very 
careful to just tap the button and not hold it - but it still 
happens. Also, I don't know if this is related or not, but even more 
occasionally, when I hit the down (-) button the band goes to the 
next higher band rather than the lower one. When that happens, the 
band will continue to go higher with each tap of the down button 
until I tap the up button.


I have resoldered the switch pins and checked that the IC's are 
properly seated.


Has anyone else run across this problem - and if so, what was the solution?

Thanks.

73,

Larry Ingram AG4NN  


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Re: [Elecraft] K2: Various Receive Problems

2008-11-08 Thread L. D. Ingram

Jon,

I wonder if you are tuning at the fastest rate - at that rate the 
signals would seem to jump in and out as you are describing and since 
they would not be in the center of the filter passband most of the 
time it might explaing the seeming lack of sensitivity.


Larry Ingram  AG4NN

At 11:06 AM 11/8/2008, you wrote:
I just finished building the K2 and am in process of checking it 
out.  All voltage tests, current tests, power tests, alignment tests 
and alignment activities were completed successfully.  I've been 
through the receiver alignment twice just to make sure, and got good 
peaking on each band.


I'm hitting various receive problems that are just strange and I'm 
going to have a little trouble explaining some of them, so please bear with me.




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[Elecraft] W1 power meter enclosure

2008-10-09 Thread L. D. Ingram

There have been several comments on enclosing (or not) the W1.

I built one into a small metal enclosure to have something that 
looked nice on the shelf with the K2.


I have put pictures on my web site (just getting that up and running) 
at http://www.lawrenceingram.com


If you have any questions, please ignore the contact page (I don't 
have access to that e-mail address yet) and send me an e-mail at 
[EMAIL PROTECTED]


73  Larry Ingram AG4NN

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[Elecraft] K3 2 meter transverter

2008-04-19 Thread L. D. Ingram

Werner,

snip
Hi Guys

Just was curious after reading about the 6 meter opening posts and how much
fun it can be and was wondering about 2 meters. Is there enough activity and
how wide use does it receive?
snip

I recently put the XV144 on the air using my K2 as the IF and an 11 
element beam at 50 feet to get started in weak signal VHF and have 
found a good bit of activity in my area in a 150 mile radius. I have 
heard stations in Mississippi and South Carolina but wasn't able to 
raise them with the 20W out of the XV144.


I think the excitement is in the hunt and am looking forward to 
spending more time tuned to 2 meters - I am currently building 
another K2 so I can keep this one monitoring 2M (and other bands in 
the future) and use the new on HF.


YMMV

73

Larry Ingram AG4NN

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[Elecraft] K2/K60XV problem

2008-02-27 Thread L. D. Ingram

Phillip and Don,

You came through for me - I had made a note on the K60XV manual about 
changing R6 in the ATU but somehow never got around to doing it.


The resistor change has taken care of the problem and now on 
alignment of the 6 meter transverter.


Thanks.

Larry Ingram  AG4NN

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[Elecraft] K2/K60XV problem

2008-02-27 Thread L. D. Ingram

Phillip and Don,

You came through for me - I had made a note on the K60XV manual about 
changing R6 in the ATU but somehow never got around to doing it.


The resistor change has taken care of the problem and now on 
alignment of the 6 meter transverter.


Thanks.

Larry Ingram  AG4NN

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[Elecraft] K2/K60XV problem

2008-02-25 Thread L. D. Ingram

Hi,

I installed the K60XV in my K2 and while checking the output I 
discovered that when I increase the power control the output follows 
the control until I reach about .85 mW out then the output jumps to 
2.7mW and stays there.


When I bring the control back down, the output remains at 2.7mW until 
I reach about .65mW on the LCD screen.


I have checked that all components are in the correct places and that 
the diodes are properly oriented and all solder joints are good.


I did a quick in-circuit check in the diodes and an out of circuit 
check on Q2 - all check OK.


I checked the voltage change on the VRFDET line and it does the same 
thing as the power output - it increases smoothly until the output 
jumps to m2.7mW and then remains constant at a little over 3V.


Before I go any further or bother the very busy folks at Elecraft I 
thought I would see if anyone on the reflector has run into the problem.


All suggestions gratefully accepted.

Thanks

Larry Ingram  AG4NN

K2 SN 2529

ps - all upgrades have been done on the K2

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[Elecraft] K2/K60XV problem

2008-02-25 Thread L. D. Ingram

Phillip and Don,

Thanks for the quick replies - yes I do have the KAT2 installed. I 
originally built the K60XV some months ago and seem to remember 
something about changing a resistor in the ATU but I am not sure. I 
will look at it in the morning.


Don, this is on the low power and the transverter parameters are 
properly set. In fact I have been successfully using it with the 2 
meter transverter but I did have to turn the power control back from 
the 1mV setting to keep the power level on the transverter at 20W. I 
am finishing up a 6 meter transverter and put the K2 back on the 
bench to set it up when I rechecked the power adjustment and 
discovered why I had to back down on the power control for the 2 meter unit.


Thanks again and I will check on the resistor tomorrow and let you 
know what I find out.


Larry Ingram  AG4NN

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Re: [Elecraft] K2 and wire antenna

2008-01-06 Thread L. D. Ingram

At 04:27 PM 1/6/2008, you wrote:

 cut My HF antenna at present is an inverted V configuration hung 
from one of the trees at about 40 feet off the ground (also the yard 
is not level, there are several slopes) and the end points tied to 
another tree on one side of the yard and a fence on the other 
side.  The antenna was cut for 40 meters.  The feed line is an 
unknown length of 300 ohm television twin lead coming into the attic 
then through a closet to the radio.


Would the K2 with an internal ATU be able to work with this 
antenna/feed line combination?


Thank you,
Jim  KD5VXH

JIm,

I have had very good performance from an inverted V hanging from an 
oak tree at 30 feet to the center with my K2. My inverted V is 
actually a three band unit with wires cut for 40, 30 and 20 meters 
all fed at the center with 50 ohm coax. I used an antenna analyzer to 
trim the wires, starting with the 40 meter section first, for minimum 
SWR at my operating frequencies. I had very little problem getting a 
match for each band and I did not need an antenna tuner. The 40 meter 
section can also be used for 15 meters but I found that the match was 
up near the top of the band and an antenna tuner (I use the KAT2) is 
needed to prevent the K2 from cutting back on the power due to the 
higher SWR at the lower end of the band.


Larry AG4NN

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[Elecraft] W1 Power Meter

2007-04-21 Thread L. D. Ingram
Recently there was some discussion about wanting to mount the W! 
power meter in a case and several suggestions were offered.


I have just finished mounting mine in a 4 X  2 X 5 1/5 utility box 
by making a small pc board to mount the LEDs separately.  It turns 
out that there is no need to run a wire from each LED leg to the main 
board; the way the LED's are matrixed you only need 12 wires.


The 4 X 2  front panel has the LED indicators for forward power and 
SWR mounted horizontally with the 3 LED range selection LEDs mounted 
underneath and the on/off switch in the lower right corner. The coax 
connectors, DC power in, and the digital socket are mounted on the 
back panel. The main board is mounted on several spacers in the 
bottom of the box.


It makes a nice addition to my small station if I do say so my self. Hi.

If anyone is interested I can send you a .pdf file with some 
pictures. Just contact me off the reflector.


Larry  AG4NN
K2  2529

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Re: [Elecraft] Nuts and Bolts (WAS:] KX-1 KXBD1 KEYER ISSUE)

2006-06-18 Thread L. D. Ingram

Dave W5SV wrote:

I am guessing, but my understanding is that to fasten a screw, you turn
the screw; to fasten a bolt, you turn the nut (not the bolt)... at
least, that is how I differentiate between the two, rather than on what
kind of hear they have.



Ron AC7AC wrote:

A bolt is specifically a screw that is cylindrical: it always takes a nut.

Egad! Even nuts, bolts and screws can get complicated!

--

What about lag bolts?

Larry Ingram  AG4NN


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Re: [Elecraft] CW-Pitch 600 Hz or 700 Hz or what?

2005-11-13 Thread L. D. Ingram


Perhaps the enhancement could be a BFO that is adjusted by a front panel 
control?


This would be nice, and I presume that you mean that the knob would 
maintain the location of the BFO in relation to the passband along with 
the sidetone pitch.  Currently it's possible to adjust the pitch from the 
menu (although this is not a one-knob operation!), but in order to keep 
the selected pitch inside a narrow passband, you need to do the CAL FIL 
procedure.


So the knob that you refer to would have to cause the microprocessor to 
recalculate the VCO offset that is used to place the selected pitch at a 
given location in the filter passband.  This is what happens when you run 
CAL FIL.
This is the one feature that I really wish the K2 had.  My TS-940 and 
756-ProIII both have this, and I find it very helpful.  It's not only nice 
to be able to customize the sidetone pitch, but I like to tweak it easily 
via a front-panel knob every so often during long operating periods, like 
contests - adjusting the sidetone (and zero-beat point) up or down a little 
from time to time seems to help minimize ear (or is it brain?) fatigue.


If the filters are not set too narrow I find that the RIT does this for me.

Larry Ingram  AG4NN
K2 SN  2529 



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[Elecraft] variacs

2005-04-25 Thread L. D. Ingram

Hi,

A few months ago I let everyone know that I had some salvaged variacs in 
excellent condition - they were all snapped up.


I now have some more available and want to give everyone on the reflector 
first choice before I try to sell them elsewhere.


The specs are:

Variac:
Input: 120VAC, Freq 50/60 Hz, Phase 1
Output: 0-140VAC, Amps 15, KVA 2.1

Motor - Synchronous/Stepper
600 Oz In, 3.3 RPM, 120VAC, .3 Amp, 50/60 Hz

Weight - 25lbs
Geared for one minute end to end sweep of the variac.

Can be used with the motor or disassembled and used separately.

I can let these go for $50.00 + $25.00 for packing and shipping for a total 
of $75.00.


If you are interested please contact me off the recorder 
([EMAIL PROTECTED])


Thanks for the bandwidth.

Larry Ingram  AG4NN  K2 SN 2529 


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Re: [Elecraft] DMM Minimum Capacitance Measurements ?

2005-01-11 Thread L. D. Ingram

Jim,

I imagine different DMMs have different lower ranges, but what ever the 
lower range is, you can measure even smaller capacitors by paralleling them 
with one that does fall into the lower range of your particular DMM. First 
measure the value of the capacitor that falls within your DMM's range then 
connect the smaller one in parallel - the difference in the new value 
measured is the capacitance of the smaller one. Of course with small values 
you have to use the shortest possible test leads and make sure they stay 
about the same distance apart for both measurements.


Larry Ingram   AG4NN   K2 sn 2529

snip.

What is the lowest capacitance value you can measure with the popular  DMMs ?

(in picoFarads ?)  DMM specs do not spell out what the minimum 
capacitance  is..


Jim - W1FMR

.
snip 


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[Elecraft] Variacs available

2005-01-05 Thread L. D. Ingram

Hi all,

I have fallen heir to some motorized variacs salvaged from Thompson TV 
transmitters. They are tested and in excellent condition. The specs are:


Variac:
Input: 120VAC, Freq 50/60 Hz, Phase 1
Output: 0-140VAC, Amps 15, KVA 2.1

Motor - Synchronous/Stepper
600 Oz In, 3.3 RPM, 120VAC, .3 Amp, 50/60 Hz

Weight - 25lbs
Geared for one minute end to end sweep of the variac.

Can be used with the motor or disassembled and used separately.

I can let these go for $50.00 + $25.00 for packing and shipping for a total 
of $75.00.


If you are interested please contact me off the recorder 
([EMAIL PROTECTED])


Thanks for the bandwidth.

Larry Ingram  AG4NN  K2 SN 2529 


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