For Sale:
The KPA-100, 100 watt K2 option still in kit form. Has not been built. Parts
still in plastic bags. Original box.
Last price from Elecraft was $699. I am asking $700 to include US shipping.
Respond to ns6x.j...@gmail.com
72/73
John Kitchens, NS6X
Don,
I think that the voltage drops to 13 V or lower at key down.
I will follow your advice.
Thanks again.
73,
Ioannis PA1EQP
On Monday, 25 April 2016, Don Wilhelm wrote:
> Ioannis,
>
> Back the CAL CUR down to 3.50.
> It may be that you will have Hi Cur messages if you turn the POWER knob to
Ioannis,
Back the CAL CUR down to 3.50.
It may be that you will have Hi Cur messages if you turn the POWER knob
to full clockwise, but if you set the power control at 100 watts, that
message should not appear.
If it does, check the connections from the power supply to the
K2/KPA100. If the
Thanks Don,
I understand that the PS current reading is only for the Base K2.
I will rely on the bench PS display to read the 13.8 DC current.
I have already set the CAL CUR to 3.8 Amps so that I do not get HI CUR
alert at 10 Watts.
73,
Ioannis PA1EQP
On Sunday, 24 April 2016, Don Wilhelm wrote
The current display on the K2 is only for the current used by the base
K2. I use it when testing the K2 for 'good health' and normal RF Gain,
but during operating I see no need to monitor it on a regular basis.
The Base K2 will indicate Hi Cur if the current draw goes above the
value set by the
Thanks Don,
That means that at HI PWR (>11 Watts) should disregard the displayed PS
current figures.
I thought that KPA100 processor would communicate the I Sense back to the
MCU and display the correct current figure after rescaling. I understand
that is not the case.
73,
Ioannis PA1EQP
On Sund
Ioannis,
The current display on the K2 indicates only the current for the base
K2, not for the K2 and KPA100 combination.
That is why you set the CAL CUR to 3.50 amps even though the KPA100 will
draw much more current.
Yes, the KPA100 does have a scaling on the amount of RF voltage that is
b
Just finished building the KPA-100 for my S/N 2102 K2 (MCU v. 2.03D, KPA
1.06)
The K2/100 does not display the correct 13.8 V power supply current (by
taping Display) when it switches to HI POWER (>10 Watts).
I used a DMM in series to accurately measure the PS supplied current while
checking the K2
Hi Hans,
I put an external fan (diameter abt 12cm) onto top of the heatsink of
the KPA100. This fan runs very quiet at slow speed during TXing. The
KPA100 internal fan is normaly off, even during rag chewing QSO in CW
over hours.
regards, paul
hb9axl
_
I do a bit of rag chewing on my K2 with my KAP100/KAT 100 in EC2 enclosure.
With only two participants rag chewing the grilles of the KPA100 on the top of
the EC2 enclosure tend to get hot.
They are more than luke warm to the touch after half an hour of rag chewing
running 100 watts.
Will I get a
I do a bit of rag chewing on my K2 with my KAP100/KAT 100 in EC2 enclosure.
With only two participants rag chewing the grilles of the KPA100 on the top of
the EC2 enclosure tend to get hot.
They are more than luke warm to the touch after half an hour of rag chewing
running 100 watts.
Will I get a
Frank,
I use the KPA100 with my KX3 and my K2 and it works fine. I replaced the
MCU of the KPA100 with a PIC16F876A with my own firmware. The KPA100 is
controlled now via its serial port (homemade communication protocol) by
PC or an homemade interface (display and controller with serial port).
Frank,
The KPA100 is dedicated to the K2.
To operate the KPA100, it needs the base K2 MCU to change bands, do T/R
switching, and monitor the power output (among other things).
Those functions depend on the signals to and from the base K2 MCU. The
same is true of the KAT100 mounted in your EC2 e
Squinting at my KX3 and my K2 / external KPA100/EC2…
Anyone try it?
Frank KG9H
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Th
Problem solved. The K2 tune mode was limiting me to 20 watts (embarrassed).
Once past that I get high power like I expected.
Thanks anyway!
Brian Denley
KB1VBF
Sent from my iPad
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They started taking orders for the KXPA100 and will start shipping sometime in
August. From the context it appears you are referring to the amp for the KX3.
Ariel NY4G
Sent from my iPhone
On Jul 23, 2013, at 11:57 AM, "George Howe Jr" wrote:
> Does anyone know if the amp with tuner is ready
Jeff (and all),
If you are asking about the KPA100 and KAT100 (for the K2), then the
answer is yes, it has been shipping from stock for a long time.
The KPA3 and KAT3 100 watt amp and tuner for the K3 has been shipping
for a good long time now too.
OTOH if you meant the KXPA100 and the KXAT100
from:
http://www.elecraft.com/elecraft_shipping_status.htm
In engineering development and test.
Estimated shipping date Q2.
73
George
AI4VZ
-Original Message-
From: George Howe Jr
Does anyone know if the amp with tuner is ready for sale and in stock?
Jeff Drew, N4JDU
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Does anyone know if the amp with tuner is ready for sale and in stock?
Jeff Drew, N4JDU
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I don't know. All issues seemed to have disappeared. Happy again but empty
handed as to the reasons. I will ham on and be happy.
--
View this message in context:
http://elecraft.365791.n2.nabble.com/KPA-100-pop-from-TX-to-RX-tp7576200p7576838.html
Sent from the Elecraft mailing list archive
Dave,
If it does not have the popping sound when you select 8R=nor, then run
it that way.
With the updated KPA100, there is one resistor on the bottom of the
board - a 22k from the +12 volt rail to the drain of Q7.
What a 100k resistor would be doing on the bottom of the board, I have
no ide
Don,
I have fixed the mechanical buzz from the SSB tx on the KPA-100. The fault
was mine. Across the RF Aux input between the PCB and the heatsink there
seems to be a blue resistor with the colours Brn-Blk-Blk-Org-Brn with one
leg that was touching the heat sink. The legs are long and so I just
Thanks Don,
I will check the parts mentioned. I also have a feeling I may have some
common mode currents interfering a bit. I've recently put up a sloper under
the hex beam. I need to play with this. The pop on switch to RX is more
prominent on the lower bands. When I set the power to less th
Dave,
What is the T-R delay set to? If it is set to zero you may hear a 'pop'
when going to receive. Why it is not heard if 8R is set to normal is a
mystery to me.
If you have the KDSP2 installed and your KPA100 is not up to date (blue
toroid cores at RFC1 and L16) that pop would appear on *
Hello everyone,
I have just reconnected my KPA100 and I have a pop from the speaker when the
transmit switches to receive. I checked most settings including that my 8r
hold is set as per the manual. I do notice that when I set 8r normal the
pop disappears. What's the go here?
The other issue
Ray,
That statement is only made so you have some understanding of the
current draw that you will find.
Regardless of what the current level during receive may be, you will
adjust the bias pot for a 400 ma. increase in current during transmit
with no RF drive. Be certain the K2 is in TEST mod
I'm setting the bias currents on my KPA 100 following the instructions at the
top of page 51 of Appendix G Rev H. The paragraph states that 50 mA of the
measured current increase is due to the fan running at low speed. However, in
the earlier "Fan Test" section, the fan has been set to "FAN no
They've never made any statement about the cost and they've never given
specific dates, only general estimates. Those estimates have slipped as
time has passed.
Those 'rumors' got started as the TenTec information was released and the
Ten Tec is of similar drive characteristics. People immediately
Is production behind schedule? Rumors are circulating that the cost may be
more than the TenTec 418 is this true or false? Tells us when we might expect
it to hit the market now.
Jeff
N4jdu
Sent from my iPad
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I thought the following observations may be of help to anyone having
difficulty achieving the KPA 100 resistance measurements on page 44 of Rev H
of the KPA 100 manual.
I initially performed the checks using a DMM with the PCB illuminated by a
40 Watt bench light a few inches away. Resistance va
Ray,
That last turn can be difficult, especially if the other turns are not
aligned "just right". I have a tapered stainless steel probe that I
often use to compress those first turns a bit and make a hole for that
last turn. A piece of #12 solid copper wire would do the same thing. I
woul
I'm constructing the KPA 100 and I'm having difficulty in threading the correct
number of turns (4 loops of grey wire) onto the binocular coil former T2.
I've managed it eventually but it was quite a struggle and I'm wondering if
I've done something wrong! Has anyone else had this problem?
R
Hi, Ray ... the top picture in my construction blog posting on building the
KPA 100
(you can find it at
http://build-k2.blogspot.com/2011/01/kpa100-completed.html)
may be of some help. You can see that neither L16 nor RFC1 line up with
the
silk screen particularly well, but the leads lined up OK
Ray,
I have only once found a toroid with a broken wire, and I suspect the
builder nicked the wire when he was stripping the leads.
Yes, those 2 inductors have the holes in line with the silkscreen shape
of the inductor. There is no good reason why the cores have to align
with the silkscre
Ray -
Is it possible that the toroids are wound the "wrong" direction? Check
the assembly illustrations carefully. It makes a difference whether the
winding starts in a "clockwise" or "counter-clockwise" manner as to
whether or not the leads line up with the solder holes in the PC board.
Us
I am constructing the KPA 100 and have just fitted L16 and RFC1 (both blue
cores wound with 37 turns of 26 gauge wire). I am having difficulty getting
the two toroids to sit securely on the PCB because the leads do not align with
the holes in the PCB so preventing the toroids from being pulled
Hi Don,
Many thanks for your answer and your ideas! Yes, i agree, this task
would make same work ... therefore i asked :-)
I don't want to modifiy my KPA100 (in EC2 enclosure), still want to use
it with my K2.
To use KPA100 with an other rig I would like to fully control it over
the AUXBUS (
Paul,
I did not see a response to your question, but I believe the answer is NO.
I would suggest that would be a difficult task. Could the KPA100 be
converted to a standalone amplifier, I think the answer is YES, but it
would require a substantial amount of work. The bandswitching *could*
be
Hi,
'S1 nr nt ' is the display from the DSP board when it is installed.
I am in the process of building the KPA100 right now.
Calvin KA7MAY
K2# 7239
On Nov 10, 2012, at 8:12 PM, "kevinemtid @tvcconnect.net"
wrote:
> Hi Folks, I am testing a newly built KPA 100 with my K2. Upon power up, I
Hi Folks, I am testing a newly built KPA 100 with my K2. Upon power up, I
hit the Display key and get the following: Elecraft (normal message) then
S1 nr nt. Can anyone tell me what this means? Is this supposed to be a
trouble shooting code 51?
I would like to know before I proceed any further in
Hi all
did anybody analyzed the aux bus protocol and built an interface, which
emulates the K2?
73, paul
hb9axl
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Pos
Hello Group;
I am considering a KPA 100 for my K2. I am especially interested in putting it
into the EC2 enclosure so as to keep my K2 QRP lightweight and "pure". If I do
this, could I then use the KPA 100 as a stand alone QRP amp and use it with
other non-Elecraft rigs like my FT 817?
I'm gu
If anyone is thinking of selling a KPA100 to raise some money for a KX3 , I'm
interested .
Either the QRO lid version , separate EC2 enclosure version or an unbuilt /
unfinished kit would be fine ...working or not !
73 Steve G1MPW
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Behalf Of Andrew UK
Sent: Sunday, March 20, 2011 10:31 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA 100 DC power Plug
Dear Sir,
Can anyone help
I need replace the plugs (black and Red) on the end of my high power DC
lead, as they have over heated and now misshapen. I can source locally
if I
Dear Sir,
Can anyone help
I need replace the plugs (black and Red) on the end of my high power DC
lead, as they have over heated and now misshapen. I can source locally
if I knew what they are called or what series of connector they are.
Failing that I will need to order some replacements. No dam
Just on the off chance I'd like a KPA 100 to go with my newly acquired K2 .
If anyone has one that they would like to sell , either a kit or a
completed one , I'd be very interested .
Many thanks
73 steve G1MPW
__
Don,
Checked Cal tPA this afternoon. Shack temp was 70F. tPA was set at 5C.
Should have been abt 21C. Reset to 21C. This the first time that I have
looked at this since I initially set it several years ago when I built the
KPA 100. If it happens again when the shack gets cold, I will recheck Cal
George,
The first thing to check is the setting of CAL tPA. If that does not
cure your problems, ask here again.
73,
Don W3FPR
On 10/31/2010 11:05 PM, George Winship, NC5G wrote:
> My shack is in a separate building from the house and is not heated or cooled
> unless I am in there. Twice, si
My shack is in a separate building from the house and is not heated or cooled
unless I am in there. Twice, since the weather has finally cooled here in
Texas, I have had the following problem with my KPA 100. When I turn on the
K2/100, the cooling fan immediately goes to high speed. When keying th
Hi Don,
Just to tie the ribbons, I completed the KPA 100 up grade, blue cores
ect, and it made no difference, so I went back to basics, "what could
cause a poor return loss on 160 only into the KPA 100?" I checked the
following:
C86, C67, D11, R2,1 R22, C66, C60, C61, C62, C63 and R9 The fault
For sale: KPA-100 plus KAT-100 in EC2 case, plus accessories, for sale.
Fully assembled and tested, perfect condition. Contact me off list for
details.
- Jim, KL7CC
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Andrew,
OK, sorry for the 'dumb' response, but I had to check it out so there
would be no 'tail chasing' in a non-problem area.
Yes, it would seem that the input to the KPA100 is nowhere near 50 ohms
on 160m.
I don't know the vintage of your KPA100, but if it does not have blue
toroids at RFC1
Hi Don,
I am sorry I should have said:
The K2 with the KPA100 removed behaves normally, current
does not exceed 2.5A on any band at full power (between
10-17 Watts depending on band 40M I get the most power)
I have retuned 80 and 160M and I have checked all the
components for correct value C11,
Andrew,
FB on all of that.
Before doing anything else, remove the KPA100 and run the base K2 into a
dummy load. With the power at maximum, note the current draw during a
TUNE (press DISPLAY to see the voltage and current). Do that on 160 as
well as on 80 and 40 (to compare the current per b
Hi Don,
Ah very good point this rules out the low pass filter on the KPA 100, as
low power is OK. I only have this problem on 160, as 80 to 10 are fine
Th High current only show up on 160 M, the display on the K2 reads the
same on the external watt meter Bird through line. SO! symptoms below
ar
Andrew,
If the KPA100 low pass filter were a problem it would misbehave at both
the low and high power ranges because it is always in the circuit with
the KPA100 connected.
A "Hi Cur" message means the *base K2* is drawing current in excess of
the CAL CUR setting, and the power will be reduc
57
To: [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA 100 Low power on 160M
Andrew,
If you cannot get at least 10 watts out of the base K2 over all the 160
meter band you have a problem in either the 160/80 meter bandpass filter
or the 160m low pass filter. I encourage y
Andrew,
If you cannot get at least 10 watts out of the base K2 over all the 160
meter band you have a problem in either the 160/80 meter bandpass filter
or the 160m low pass filter. I encourage you to look there first.
You will likely have to compromise the bandpass filter settings between
16
HI,
I have just fitted the DSP board and it works fine, on
putting the K2 back together, I fond that 160M will not go
above 50 Watts and I get a high current warning, All other
bands are 111 Watts no problem. I am using Rohde & Schwarz
power probe and a 40dB attenuator, to the match is close to
50
Jim Wiley wrote:
When assembling the KPA-100, is it permissible to use standard
zinc-oxide filled heat sink grease and mica insulating washers in place
of the supplied silicon-rubber washers? It seems to me that the grease
option wouldn't require re-torquing because any "flow" would happen
i
Gang -
When assembling the KPA-100, is it permissible to use standard
zinc-oxide filled heat sink grease and mica insulating washers in place
of the supplied silicon-rubber washers? It seems to me that the grease
option wouldn't require re-torquing because any "flow" would happen
immediate
For those who are interested, here is more info on what I did:
see http://home.pacbell.net/johngreb/KI6WX.html
I followed the "Splitting A K2/100..." instructions and added a resistor at the
input of the KPA. I used a 300 Ohm 2W resistor leftover from the KPA upgrade
kit :)
I forgot to mention
After some more searching through various cures online, I think I have fixed
it. I added a 300 ohm 2W resistor to the input, that seemed to stop the problem.
Tor
N4OGW
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> the K2 to reset and/or show the hi-swr warning. Twice I have managed to blow
> the
> microprocessor in the KIO2 attached to this K2!
>
Meant to say that I have blown the cpu in the KRC2 twice...
Tor
N4OGW
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I've been fighting an oscillation problem with one of my K2/100's for a few
years now. My other K2/100 does not have the problem at all. Here is what
happens:
Specifically on 7 MHz and when connected to an ICE model 419 bandpass filter,
the KPA-100 has some kind of oscillation. I can tell it is
Don
Oops! I should have written
" TEST mode, both QRP and QRO, and"
Apologies
Bob MM0RKT
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Don
I've checked the bias voltages in TEST mode, both QRP and QRP, and
they're correct for all bands. So the fault is clearly not a logic one
associated with U1. So... the possibilities, I think, are
a) T/R circuit, but I don't know why that should be band-specific
b) LPFs, but QRP TX and RX is u
Many thanks, Don, for your comments.
Here's my replies...
Don Wilhelm wrote:
> "Bob,
>
> What have you finished of the Testing and Alignment. If you have not
> yet done the PA bias adjustment, your KPA100 will have little or no
> output as you describe. "
I've done SWR calibration, power calibra
Bob,
What have you finished of the Testing and Alignment. If you have not
yet done the PA bias adjustment, your KPA100 will have little or no
output as you describe.
Actually I had some trouble understanding your exact problem.
Do you mean that you have no KPA100 output on 80 meters, but it
I've just completed building the kit (bought 3 months ago from Elecraft)
and all went well until I got to Page 50 of the manual, the QRO transmit
tests. I could only get any power above 11 watts on 80m (I don't have
the 160m module). On all the other bands the output power to the dummy
load, me
Werner,
The new T/R switch design eliminates RFC10. It was a source of trouble
because it could cause a 40 meter parasitic oscillation. That problem
was usually noticed when operating with a KAT100.
Do not install RFC10 in the updated KPA100.
73,
Don W3FPR
Dr. Werner Furlan wrote:
hello,
hello,
in my KPA 100 manual there is RFC 10 from the center pin of J2 to the
Ground pin. It is no more present in the Rev. E manual. Should I install it or
not?
I plan to mount the KPA 100 on top of the Kat100 in the EC2 housing.
73!
Werner
--
You cannot kill time without injuring eternity
Karsten,
Are you measuring the current out of the power supply? Or is that the
current displayed on the K2?
If it is the current from your power supply, then I suggest that you
re-check the bias adjustment for the KPA100. See the KPA100 manual for
the procedure.
Yes, the additional 4 amp
KPA100 is aligned according to the manual.
When I key the K2/KPA100 up to 10 watts, current is up to 2 A. Looks normal.
Then I set the K2 to 11 watts (KPA100 engaded) Now current is approx. 6
Amps.
What are those 4 extra amps needed for?
When I set K2 to 20 watts, it consumes approx. 8 amps.
3
73,
Tom
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Mike Heitmann
Sent: Friday, May 25, 2007 6:35 PM
To: 'KJ3D'; elecraft@mailman.qth.net
Subject: RE: [Elecraft] KPA-100 Problem
Tom,
I hate to admit this, but I had a similar problem when I bu
@mailman.qth.net
Subject: [Elecraft] KPA-100 Problem
Good evening Group,
I seem to be having some trouble with my KPA-100. (K2 serial 4991), Perhaps
one of you could shine a light where mine don't reach.
Assembly and initial checks went OK.
At the end of the assembly, I ran into the problem.
Checks on
Good evening Group,
I seem to be having some trouble with my KPA-100. (K2 serial 4991),
Perhaps one of you could shine a light where mine don't reach.
Assembly and initial checks went OK.
At the end of the assembly, I ran into the problem.
Checks on page 46:
Junction of C77 and R11 says 90 t
On the KPA-100, two different length 3/16" hex spacers are screwed down onto
the long Allen set screws that hold the circuit board in place...When these
spacers are tightened down, they make the Allen set screws very rigid...Four
out of the seven spacers are visible after the board is installed.
Howdy all
Just finished and tested my KPA 100, no problems, worked first time -
thank you Elecraft, looking forward to using it now.
Is my luck due to run out? HI
73 Robert G3RCE
K2/100 #5219
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Jim,
Sorry about the confusion I caused. I meant to say L16 but my finger
slipped. Yes, the board built from the Rev D manual will have no
component at L15 (and R12 and C82).
You will not have voltage at D13 unless you have connected a power
supply to the KPA100.
73,
Don W3FPR
Soaring E
OK, now I'm confused. I'm currently building the KPA 100. I've just
finished soldering the finals. I currently have a blank space at L15. I
checked the schematics in my manual (Rev D, 9/25/06) and it shows that L15
is not used. I also don't have any toroids left, and I wrote in all the
errata t
Hi folks
I have a problem with the initial testing of the amp.
The initial tune up gives me a hi cur then a 0.1- 1.0 and I cant control
the watt reading.
I tune C1 and did get a 1.0 but I don't get a 5.0w when commanded.
I went on and the amp seems to be oscillating at abt 18 watts on the qrp
Roy,
The change in C31 was to cure an OSCILLATION (not sidebands) - and it should
ONLY be done IF the KPA100UPKT is installed. In fact it is currently being
shipped with the KPA100UPKT. DO NOT CHANGE C31 UNLESS YOUR KPA100 meets ALL
the conditions.
I suggest that you do re-install the ALC mod o
When I drive my Alpha 99 with the K2/100, the K2 POWER control has to be set to
approx 17 watts with the TUNE button to put out 1KW. (A 15 db gain with 17
watts input should put out approx 550 watts.) It seems that the ALC may be
engaged in TUNE but may be breaking down in SSB. However, I rec
George,
Since you suspect no power to U1, I suggest you look at the schematic to
identify the pins of U1 that are connected to the 5 volt supply line and
check for the presence of voltage with a DVM.
If you find no 5 volts where it should be, then check the regulator U3. You
should have 12 volts
Last night I did the first check of the com for the PA stage. I did not
get any NO PA PS msg from the k2.
It seems like the U1 is not getting power but I have no idea how to check
this.
Any ideas?
Thanks
George NE2I
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100K is the correct value, as shown in the Rev D manual schematic.
With 39K the system normally works, but it causes some voltages within the
KPA100 to rise above that considered safe for some components.
Ron AC7AC
-Original Message-
The latest KPA-100 schematic (dated 9/25/06) shows R
The latest KPA-100 schematic (dated 9/25/06) shows R4 across the X1 crystal is
100K. A previous mod shows R4 was changed to 39K. My amp has been changed to
the 39K value. Which value is correct? Thanks. Roy Morris W4WFB
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Don,
Sorry, I seem to have had a 'senior moment'. On resetting its now OK!
Sorry for the bandwidth.
Dunno how it got to 220 but one of those things in life.
I will keep taking the pills!
73 Bob G3PJT
Don Wilhelm wrote:
Bob,
If CAL TPA is actually 220, that is much too high - The K2 microp
Bob,
If CAL TPA is actually 220, that is much too high - The K2 microprocessor
thinks the heat sink is at 220 degrees C!!
Set it back to match the room temperature in degrees C when the heat sink is
at the ambient temperature. (i.e. 22 rather than 220).
73,
Don W3FPR
> -Original Message-
Hi
Yesterday I turned on and the fan came on even though the heatsink was
cold and when I tried to TX 'PA hot' came on and the PA was inhibited.
1. CAL tpa is 220 which is about right ~ 22C and Fan menu set nor.
2. On TX - Q3 base is 0.6v - which I think is about right (RC4 going
high of c
Looking for one already built for sale.
Jerry-KF6XN
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My KPA-100 is finished and after a few trials and tribulations it
appears to be working extremely well now. My initial transmissions
were reported to be fuzzy and buzzy so after a few stressful nights I
tried to figure out what was going on. I also had no PO control on
A few recent units have shown problems that at least
sound similar to this one. See, for example:
http://www.ac6rm.net/mailarchive/html/elecraft-list/2005-03/msg00676.html
http://www.ac6rm.net/mailarchive/html/elecraft-list/2005-12/msg00408.html
These two, at least, were due to the KSB2 ALC circ
Dave,
Is this a new KPA100? or have you had it for a couple years? Some (but very
few) KPA100s had a similar situation a while back.
If it is recent, I have no immediate answers, but if it is older, put the
change on it for the increased TR switch voltage (change R4 to 39k) and add
a 1k resistor
Hi Guys,
I am having problems with the KPA-100. 80m reports of distorted audio, like a
vibrating effect associated with it. And even when I have the PO adjusted to a
max of 15 watts it seems to transmit up to 60w out. I know it's not RF
feedback caused by antenna because I have the same prob
I have failed the power supply test on the KPA-100. I measure -0.33v across
the aux power supply to the K2.
Ah... I have confirmed that the reverse polarity protection in the KPA-100
works a treat.
Just in case any of you were too scared to try :-P
KPA-100 Power up test a success.
_
PROTECTED] Behalf Of John Wiener
Sent: Monday, July 10, 2006 4:54 PM
To: Elecraft email
Subject: [Elecraft] KPA 100 toroid "sewing"
I am winding L1: 27 turns of #22 red enamel wire on a RED T50-2 core.
I get to 22 turns and the internal parts of coiled wire touch..
I.e., no room to make mo
John Wiener wrote:
I am winding L1: 27 turns of #22 red enamel wire on a RED T50-2 core.
I get to 22 turns and the internal parts of coiled wire touch.. I.e.,
no room to make more turns. What am I doing wrong?
Am I using right core, wire?
Make sure the core is 1/2" in diameter. There's a
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