he rear, but very near the top edge. That's how mine will
be, when it arrives this week --- I hope..
Ted, KN1CBR
--
Message: 9
Date: Sun, 8 Jul 2018 10:56:03 -0700
From: Mark Goldberg
To: Elecraft M
ry near the top edge. That's how mine will be, when it arrives
this week --- I hope..
Ted, KN1CBR
--
Message: 9
Date: Sun, 8 Jul 2018 10:56:03 -0700
From: Mark Goldberg
To: Elecraft Mailing List
S
10:56:03 -0700
From: Mark Goldberg
To: Elecraft Mailing List
Subject: [Elecraft] KPA500 installation on side?
Message-ID:
Content-Type: text/plain; charset="UTF-8"
Can the KPA500 be installed on it's side? There are feet there. I want to
in
The feet are there for transport. I'm betting, because the way the case
is designed, that leaving it sitting on its side is probably not a good
idea. But I don't have a concrete reason, other than the weight of the
transformer and the design of the case.
73,
Scott N9AA
On 7/8/18 1:56 PM, Mar
Can the KPA500 be installed on it's side? There are feet there. I want to
install it in an RV and there is more room for wiring and fan air movement
that way.
A search did not turn up any answers.
73,
Mark
W7MLG
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On 7/3/2018 6:24 AM, Bob McGraw K4TAX wrote:
In running my KPA500 on FT-8 mode at about 400 watts output, what is
the recommended setting for Fan CTL? I usually keep it in NORmal
but have tried other settings.
Nearly all of my FT8 operation is on 6M, where the KPA500 is least
efficient, a
I have never been on FT8 mode and I rarely use my KPA500 so take this with
a grain of salt. I would set the fan to a speed that provides some air
flow without being annoying. Perhaps speed 2 or 3, if I recall correctly.
This should at least delay it turning on the noisier higher speed speed
fan and
In running my KPA500 on FT-8 mode at about 400 watts output, what is the
recommended setting for Fan CTL? I usually keep it in NORmal but have
tried other settings. I watch the TEMP and see that it gets above
65ºC. The fan speed increments up and down as the temperature changes
accordin
With that combination which I have, I suggest setting the CMP to a value
of 15 to 17 so as to produce about 3 to 4 bars on the CMP scale. Also,
you will need to adjust the MIC gain value such that you get 4 to 5 bars
on the ALC scale.
Yes, mike-to-mouth position is critical. I'm not familiar
Michael,
I have the KPA500 and the KAT500 but use them with an Icom IC-7610. The
amp and tuner are a great combination.
Regarding the mic and varying power, you need to maintain a consistent
distance from the mic and a consistent audio level when speaking into the
mic or your power will drop off
Hello guys!
I got my very first amp on Wednesday, a KPA500 and started using it along with
the KAT500 I ordered and a K3S I purchased last month.
Here is my question: I noticed that when I transmit, the power output varies
significantly depending upon how close my mouth is to the Kenwood MC-60
On 6/27/2018 1:33 PM, Bob McGraw K4TAX wrote:
This would give a clue if further line conditioning would be advantageous.
I'm certain that some charlatan preying on high futility nuts would be
quite happy to lighten his bank account by at least as much as he paid
for the KPA500. These products
Perhaps this is because none of us actually inspect our electricity
before buying it? I don't inspect the gasoline I buy either, and by the
time it's in the tank in my truck, I've already bought it. [:-)
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 6/27/2018 1:00 PM, Chris R. NW
NW6V
>
>
>> Message: 23
>> Date: Wed, 27 Jun 2018 12:48:19 -0500
>> From: Bob McGraw K4TAX
>> To: elecraft@mailman.qth.net
>> Subject: Re: [Elecraft] KPA500 Noise While Off
>> Message-ID: <47eb73a6-cc2f-5fd6-4318-17e76867d...@blomand.net>
>&g
Triac switch would do it. Seems like a natural for equipment but seldom used.
Chuck Jack
KE9UW
Sent from my iPhone, cjack
> On Jun 27, 2018, at 2:54 PM, Bob McGraw K4TAX wrote:
>
> Yes that is the magnetization current of the transformer core.
> Doesn't happen when powered up at the zero vo
;To: elecraft@mailman.qth.net
>Subject: Re: [Elecraft] KPA500 Noise While Off
>Message-ID: <47eb73a6-cc2f-5fd6-4318-17e76867d...@blomand.net>
>Content-Type: text/plain; charset=utf-8; format=flowed
>
>Although the front panel switch is OFF, the control circuit of the power
>
Yes that is the magnetization current of the transformer core.
Doesn't happen when powered up at the zero voltage crossing point.
One person advised to always turn on equipment at the zero crossing point.
Seems like a good idea. Now if I could only get my finger timed correctly to
do this.
I’ve only noticed a thump with a piece of equipment which has a power supply
when it turns on at a line voltage peak. On the occasion that it turns on at a
line voltage zero crossing, it makes no noise at all.
Chuck
KE9UW
Sent from my iPhone, cjack
> On Jun 27, 2018, at 2:10 PM, Bob McGraw K
Seems that the AC line supplying the equipment has a rather high impedance thus
allowing the voltage to suddenly drop under the dynamic load and then surge to
a higher than normal value.
A dedicated 120V and/or 240V service should be considered for the station
power.
Laser printers do draw c
My Astron RS35 does the same thing under the same conditions.
-John NI0K
Matt NQ6N wrote on 6/27/2018 1:20 PM:
My KPA500 makes a noticeable hum/thump when the laser printer that is on
the same circuit draws a lot of current.
73,
Matt NQ6N
On Wed, Jun 27, 2018 at 12:58 PM Jim Brown
wrote:
O
My KPA500 makes a noticeable hum/thump when the laser printer that is on
the same circuit draws a lot of current.
73,
Matt NQ6N
On Wed, Jun 27, 2018 at 12:58 PM Jim Brown
wrote:
> On 6/27/2018 10:37 AM, Richard Wade wrote:
> > If I had to venture a guess, I would say that somehow the unpowered
On 6/27/2018 10:37 AM, Richard Wade wrote:
If I had to venture a guess, I would say that somehow the unpowered KPA500
was picking up noise on the shack wiring. Very strange. Is that possible??
It is if equipment in your shack is not properly bonded together, and to
house grounds that are also
Dick,
The KPA500 has a power supply switch on the rear panel adjacent to the
socket for the power cord. When you press the OFF button on the front
panel the control circuitry is still active. This permits software to
remotely power up the amp. If you turn off that rear switch all power is
remo
Although the front panel switch is OFF, the control circuit of the power
supply remains ON as long as the rear power switch is ON or power is
applied. It is normal to hear a small amount of hum from the power
transformer and the left rear of the cabinet to be slightly warm. See
page 14 of the
Yesterday I heard a faint "hum" in my shack but all of my gear was off. It
sounded like possibly a fan running or power supply noise. I did a very
scientific test of the sound source by putting my ear to each piece of
equipment in my shack and soon found that the noise was coming from my
KPA500!
With the KPA1500 about to arrive (Yay!) the question is what to do with the
KPA500 / KAT500. In my circumstances it would make sense to have them driven
by a KX3. I understand 12 watts out of the KX3 will get me 200 to 250 out of
the amp. The question, though, is how to get the greatest degr
Randy,
also there I am sending the ordering number if you want to ask for kit at
Elecraft directly...
E850607
73 - Petr, OK1RP
-
http://ok1rp.blogspot.com
--
Sent from: http://elecraft.365791.n2.nabble.com/
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Elecraft mailing lis
Hi Randy,
look there on my blog for more info regarding the KPA500 modification.
http://ok1rp.blogspot.com/2017/02/elecraft-kpa500-lpf-tr-switch-rework.html
You do not need in fact the kit from Elecraft as you can buy the parts,
following
my article mentioned above, by yourself.
Drop me an
The first thing I would have done if I would not have seen it on the page
at Elecraft, is to call the technical staff. I am glad to say we have a
great team that supports their entire line if we have a problem or
question. That includes Eric and Wayne as I've yet to see any other CEO of
any other m
I had a chance for a nice visit with David Shoaf at the Elecraft booth
at Ham-Com this weekend. In the course of the conversation, he mentioned
the availability of a mod kit to change out Q5 on the LPF board to
prevent PIN diode failure in the T/R switch. He highly recommended that
this mod be
Also are you connecting the computer audio to the rear? And are you using
DATA mode?
The USB on the rear should connect directly to the computer.
Bob, K4TAX
Sent from my iPhone
> On Jun 6, 2018, at 12:51 PM, MaverickNH wrote:
>
> I'll add I seem to have an all-or-none limit in adjusting
You may have to adjust the PWR slider on the right side of the WSJT-X display.
Set the power you wish to operate using PWR control on the radio.
Do not use the suggestions of others UNLESS they have a K3S. ICOM, Kenwood &
Yaesu radios do not set up and operate like an Elecraft.
Bob, K4TAX
Yeah - it was OK but maybe the Spring Win10 Update changed some settings.
Thanks!
Best regards,
Bret
C. Bret Jessee
-- Original Message --
From: Grant Youngman
To: MaverickNH
Cc: elecraft@mailman.qth.net
Sent: June 6, 2018 at 1:54 PM
Subject: Re: [Elecraft] KPA500 Sporadic Power Hi
It sounds like you need to back off a little bit on the level coming out of the
PC …
Grant NQ5T
K3 #2091, KX3 #8342
> On Jun 6, 2018, at 1:51 PM, MaverickNH wrote:
>
> I'll add I seem to have an all-or-none limit in adjusting my MIC Gain - it's
> 5 bars on none when runing TUNE from WSJT-X.
>
I'll add I seem to have an all-or-none limit in adjusting my MIC Gain - it's
5 bars on none when runing TUNE from WSJT-X.
Bret/N4SRN
--
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Running my K3S with KPA500 to a Par OA-50 6m antenna with KAT500 and K3S ATU
on bypass as the antenna is tuned to ~1.1 SWR. I'll be doing an FT8 QSO and
power will read 100W on one TX and then a few watts next. If I budge the K3S
knob up/down a hair, it will jump back to 100W. When a few watts, I g
34 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 and K3 SWR meters disagree
Make and break syndrome!
Either there was a connector that was not fully mated even though you
thought it was (something fouling a thread making it appear snug) or
some oxidation/schmutz on one of the m
Make and break syndrome!
Either there was a connector that was not fully mated even though you
thought it was (something fouling a thread making it appear snug) or
some oxidation/schmutz on one of the mating surfaces.
I've experienced BOTH... it is maddening for sure. That's why I now put
jeff griffin
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 and K3 SWR meters disagree
Loose or poor quality PL-259. There are many which "look good" but are not.
Always snug PL-259 connectors on the SO-239 such they are a bit more than
finger tight. I use/have a pair of 4&qu
d...
>
> 73 Jeff kb2m
>
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of jeff griffin
> Sent: Saturday, June 2, 2018 11:49 AM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] KPA500 and K3
an.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of jeff griffin
Sent: Saturday, June 2, 2018 11:49 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500 and K3 SWR meters disagree
I recently brought my KPA/KAT500 north for the summer and hooked up to my
trapped multiband fan dip
experienced this
> behavior.
>
> 73 Jedff kb2m
>
> -Original Message-
> From: Jack Brindle [mailto:jackbrin...@me.com]
> Sent: Saturday, June 2, 2018 4:47 PM
> To: jeff griffin
> Cc: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KPA500 and K3 SWR meters disagr
in
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 and K3 SWR meters disagree
Jeff;
Do I understand that for the first test you are driving the antenna through
the KPA500 and KAT500 (with KAT500 in bypass)? If so, it makes a lot of
sense that you will see different SWR. The KPA and KA
Sent: Saturday, June 2, 2018 1:54 PM
To: jeff griffin; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 and K3 SWR meters disagree
Jeff,
Check the coax between the KPA500 and the KAT500. Make certain the
connectors are tight. Replace with a different coax if you have one.
You can always do a
Jeff;
Do I understand that for the first test you are driving the antenna through the
KPA500 and KAT500 (with KAT500 in bypass)? If so, it makes a lot of sense that
you will see different SWR. The KPA and KAT are providing a completely
different load for the K3. The better test is to feed the a
Jeff,
Check the coax between the KPA500 and the KAT500. Make certain the
connectors are tight. Replace with a different coax if you have one.
You can always do a check on the KPA500 wattmeter by connecting a dummy
load to the KPA500 (no tuner).
73,
Don W3FPR
On 6/2/2018 11:48 AM, jeff gr
I recently brought my KPA/KAT500 north for the summer and hooked up to my
trapped multiband fan dipole that I use here in NJ. I leave my K3 here for
remote use and use the amp at my winter home in Florida to use with my Flex
6500 with a Steppir Vertical antenna without the KAT500 tuner. When I
"That's perfectly normal at that low power output. The 50% spec is at full
output."
Thanks for pointing that out. I did a spot check on the same band with KPA500
indicated output of 490 W (LP-100A 500W) and found the efficiency was 60.6%
(61.9% if LP-100A power is used).
73,
Andy k3wyc
_
.
73, Charlie k3ICH
*the K3 is the exception since it bypasses the 100W amp when you go LOW (smart
radio eh?).
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of K9MA
Sent: Tuesday, May 22, 2018 1:07 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 coolin
On 5/21/2018 23:18, ANDY DURBIN wrote:
My KPA500 seems horribly inefficient when compared to my TS-590S running a similar power
output. The data for the heating test showed a PA efficiency of 23%, far short of the
"approximately 50%" stated in the specification.
That's perfectly normal at th
Bob,
I have made no changes to the cooling of my KPA500. I also have no idea to
what extent the designers of the KPA500 studied the thermodynamics of the
design. I have, however, been surprised at how quickly it heats up.I
abandoned a heating test with the amplifier only producing 100 W
It seems that at least one person was confused by my data. Let me try again,
this time including data for each step rather than just the data that bracketed
the WS power transitions:
LP-100A WS
24.9 00
25.8 10
26.4 25
28.7 25
29.8 30
33.4
Sorry, there was a typo in the table. It should read:
WS pwr LP100 pwr
0024.9
1025.8
2526.4 <
2528.7
3029.8
3039.6
4040.3
73,
Andy k3wyc
From: ANDY DURBIN
Sent: F
The KPA500 provides the ^WS; serial interface interrogation which returns
output power and SWR. The power and SWR are reported for STBY and OPER modes.
In OPER mode the power seems to have a resolution of 1 Watt. In STBY, if I
increment my drive power in 1 Watt steps the power reported by ^W
The amp and tuner have been sold. Thanks to all who replied.
-larry (K8UT)
-- Original Message --
From: "Larry (K8UT)"
To: "elecraft@mailman.qth.net"
Sent: 2018-05-16 10:22:54
Subject: [Elecraft] FS - Elecraft KPA500 and KAT500
For Sale - an absolutely pristine
For Sale - an absolutely pristine KPA500 amplifier and KAT500 tuner
pair. Includes both interconnect cables. Two years old, in perfect
working order, has never required repair, never used anywhere but in my
non-smoking shack. $2300 plus shipping/insurance (CONUS anticipated
around $75) from 481
Andy,
If you do connect the ALC, check the maximum drive power that you need
for each band and do not exceed it. In other words, do not drive the
amp into ALC.
Using ALC to control the transceiver drive power will result in
overdrive and distortion. You can hear that distortion on the band
"That's the point. The ALC cable protects the KPA-500 when the operator
"spaces" and leaves the exciter power control at full power (100+ Watt) level."
My experience, and I have 10 Hz logger data, shows that the amp alarms, sets
fault FL06, and drops into standby mode with no change in the ALC v
Don is correct (as usual). The KPA will first see the band change, perform that
task, then try to amplify at the desired frequency. If it then sees a bad
reflected power level it will wait for the KAT to do something (which means
removing PTT, then performing its own correction, then re-enabling
John,
The amp is bypassed if the KAT500 needs do do any tuning or switching,
so I suspect the amp will not fault.
That is why you run the keying line first to the KAT500 and then from
the KAT500 to the KPA500, so the tuner can disable the amp.
73,
Don W3FPR
On 5/10/2018 9:31 AM, j...@kk9a.
I concur that the RF sense works very well, at least it does with an
external antenna switch and reasonably good antenna SWR. I am not sure
what happens if you also use the KAT500 as an antenna switch or your
untuned SWR is very bad. Does the amp fault during this first dit?
John KK9A
Jim Brow
On 2018-05-09 6:48 PM, Jim Brown wrote:
>
It's certainly OK to HOOK UP the ALC cable, but it's VERY BAD
PRACTICE to DEPEND on ALC to set power out. Doing so is a recipe for
terrible clicks and splatter. ALWAYS set power using the output power
knob on the transceiver. The ONLY virtue of ALC is to
On 5/9/2018 11:31 AM, Joe Subich, W4TV wrote:
As an alternative, you can allow the KPA-500 to band switch based
on detected RF and use the "Basic Cabling" diagram on page 20. In
that case you will want to use two RCA connections - one between
the "SEND" jack on the IC-7300 and PA Key on the KPA-
: Re: [Elecraft] KPA500 installtion with ICOM 7300
> The owners manual is of no help.
Have you actually read the KPA-500 Owner's Manual?
Use the "K3 Enhanced cabling" diagram on page 22 but substitute a
cable made according to the instructions in "Icom Cable Connections&qu
I used a KPA500 with a Yaesu transceiver and it worked very well just
letting the amp's RF sensor switch bands. I did not use an ALC cable.
John KK9A
Joe Subich, W4TV wrote:
> The owners manual is of no help.
Have you actually read the KPA-500 Owner's Manual?
.
As an alternative, you can all
> The owners manual is of no help.
Have you actually read the KPA-500 Owner's Manual?
Use the "K3 Enhanced cabling" diagram on page 22 but substitute a
cable made according to the instructions in "Icom Cable Connections"
(page 18) instead of the DB15HD/DB15HD cable used with the K3.
As an alte
I need help in hooking up my ICOM 7300 to a KPA500 linear amp.
The owners manual is of no help.
Brian Phelan
bjphel...@verizon.net
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Bill,
The Y-BOX v2.1 and single $20 25ft M/F "HD15" cable could let you remote
the KPA1500 or KPA500 to the garage quite nicely, including remote power
power on/off via a K3 macro. I haven't tested a cable that long, but know
of no reason that it won't work as long as the voltage drop isn't
signi
I agree with Jim here. I am thinking of getting a KPA1500 to
replace my Expert 1.3K. (I got the 1.3K after my wife won a
$1000 off prize at the Top Band Dinner. I thought the 1.3K would
have good resale value given its use on DXpeditions.)
The logical place for the amp is in my garage, near th
You would need to sign a non-disclosure agreement for anything beyond
the logic level (TTL) and pinout information. I've never heard of one
being given out for this purpose.
--
David Woolley
Owner K2 06123
On 29/04/18 21:59, ANDY DURBIN wrote:
Can someone please point me to a definition or s
On 4/29/2018 8:27 PM, Wayne Burdick wrote:
philosophical, or metaphysical questions
How appropriate on a Sunday night!
73, Jim
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On 4/29/2018 2:45 PM, Don Wilhelm wrote:
The AUXBUS protocol is Elecraft proprietary and is not published.
It is the single wire communications between the K3 and its options,
both internal and external.
It DOES seem reasonable to publish at least an electrical transmission
spec for it -- i.
eful.
>
>
> I may have to resort to instrumenting the shift register signals from the
> front panel to the LPF but I was hoping to avoid that.
>
>
> 73,
>
> Andy
>
>
>
>
>
> From: Don Wilhelm
> Sent: Sunday, Apr
e
> are still unresolved issues with my KPA500.
>
>
> 73,
>
> Andy k3wyc
>
>
>
> From: Don Wilhelm
> Sent: Sunday, April 29, 2018 5:42 PM
> To: ANDY DURBIN; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KPA500/K3 AUX bus specificati
Don Wilhelm
> Sent: Sunday, April 29, 2018 5:42 PM
> To: ANDY DURBIN; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KPA500/K3 AUX bus specification
>
> Andy,
>
> While you seem capable of reverse engineering the AUXBUS, it is fraught
> with danger if you get
IN; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500/K3 AUX bus specification
Andy,
While you seem capable of reverse engineering the AUXBUS, it is fraught
with danger if you get it wrong.
You are "own your own" in this matter.
73,
Don W3FPR
On 4/29/2018 7:37 PM, ANDY DURBIN wro
*From:* Don Wilhelm
*Sent:* Sunday, April 29, 2018 2:45 PM
*To:* ANDY DURBIN; elecraft@mailman.qth.net
*Subject:* Re: [Elecraft] KPA500/K3 AUX bus specification
The AUXBUS protocol is Elecraft proprietary and is not published.
It is the single wire communications between the K3 and its option
73,
Andy
From: Don Wilhelm
Sent: Sunday, April 29, 2018 2:45 PM
To: ANDY DURBIN; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500/K3 AUX bus specification
The AUXBUS protocol is Elecraft proprietary and is not published.
It is the single wire communications betw
Proprietary. I’ve decoded a couple of messages, but AFAIK there is no
publication.
Ken K6MR
From: elecraft-boun...@mailman.qth.net on
behalf of ANDY DURBIN
Sent: Sunday, April 29, 2018 1:59:47 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500/K3
Subject: [Elecraft] KPA500/K3 AUX bus specification
Can someone please point me to a definition or specification for the KPA500 -
K3 AUX Bus. I have the KPA500 Programmer's Reference but this appears to only
cover the KPA500 - PC inte
-boun...@mailman.qth.net] on
behalf of ANDY DURBIN [a.dur...@msn.com]
Sent: Sunday, April 29, 2018 3:59 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500/K3 AUX bus specification
Can someone please point me to a definition or specification for the KPA500 -
K3 AUX Bus. I have the K
Can someone please point me to a definition or specification for the KPA500 -
K3 AUX Bus. I have the KPA500 Programmer's Reference but this appears to only
cover the KPA500 - PC interface.
Thanks and 73,
Andy k3wyc
__
Elecraft maili
I don't think the clicks have anything to do with the transformer mounting.
On my amp it occurs when the transistors heat up. Keeping the fan on a
higher speed will eliminate this clicking however then you have to listen to
fan noise. Perhaps Elecraft has a fix for this but I have not used the amp
My KPA500 clicking has pretty much stopped as well. The transformer noise has
also reduced in amplitude over time (about 3 months).
Michael Blake
k9...@mac.com
On Apr 21, 2018, at 03:26 PM, Craig Buck wrote:
Make sure the transformer is on straight and secured. Mine clicked for a
while but h
Make sure the transformer is on straight and secured. Mine clicked for a
while but has since stopped.
On Sat, Apr 21, 2018, 1:35 PM ANDY DURBIN wrote:
> I find the "clicks" my KPA500 makes as its temperature changes to be quite
> distracting. Part of the problem is that I'm chasing a problem w
I find the "clicks" my KPA500 makes as its temperature changes to be quite
distracting. Part of the problem is that I'm chasing a problem where the
KPA500 changes band spuriously and the thermal clicks sound too much like the
relays re-configuring the LPF.
To what extend does the thermal desi
Robert,
It is possible that the fault is brief enough to register in the fault
table, but not turn off the amp.
The 65 to 85 volt range is to be determined with the amplifier turned
on, but not keyed and certainly not running at 500 watts.
Do as the manual indicates and measure you AC Mains
My KPA500 was purchased new in July 2017. Use regular 120V outlet.
I run the red transformer tap to keep my transmit HV above 60 at full 500
output.
The yellow tap did not provide sufficient voltage on transmit. Thus the
red.
I have a whole-house surge protector just outside my main breaker box.
I don't understand this Joe. The KPA500 has an internal PS. A separate
Astron PS serves no purpose for the amp. Do you mean both the amp and
the rig+PS are on the same circuit?
Gus Hansen
KB0YH
On 3/29/2018 6:47 PM, Joe K2UF wrote:
I have been using my KPA500 for over 7 years using an Astr
: [Elecraft] KPA500 power supply
I am ready to order a KPA500 and wonder if anyone out there has regretted
operating one from 115-volt service.
Thanks and 73,
Dennis, at the moment CT9/N7DH
Sent from my iPhone
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[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian F. Wruble
Sent: Thursday, March 29, 2018 8:38 PM
To: Dennis Haarsager
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 power supply
I use 115. Works fine. It is a very robust device. 73 de Brian W3BW
On Thu, Mar 29, 2018 at 2:19
I use 115. Works fine. It is a very robust device. 73 de Brian W3BW
On Thu, Mar 29, 2018 at 2:19 AM Dennis Haarsager
wrote:
> I am ready to order a KPA500 and wonder if anyone out there has regretted
> operating one from 115-volt service.
>
> Thanks and 73,
> Dennis, at the moment CT9/N7DH
>
>
On 3/29/2018 5:03 AM, David Bunte wrote:
I have operated mine from my 120 volt service in my shack for years with no
issues at all. Most folks I have talked to about it do as well. One friend
used his on 240 and I could detect no difference in performance.
I run mine on 240V in the shack and on
From: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net] on
behalf of Dennis Haarsager [haarsa...@gmail.com]
Sent: Thursday, March 29, 2018 1:17 AM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] KPA500 power supply
I am ready to order a KPA500 and wonder if anyone out ther
at an optimal condition
beyond +/- 5%
73
Frank
W3LPL
- Original Message -
From: "Joe Subich, W4TV"
To: elecraft@mailman.qth.net
Sent: Thursday, March 29, 2018 1:40:55 PM
Subject: Re: [Elecraft] KPA500 power supply
> (not sure why we call it 220, 'cuz i t
-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes Stewart
Sent: Thursday, March 29, 2018 7:41 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 power supply
Not a problem.
Wes N7WS
On 3/28/2018 11:17 PM, Dennis Haarsager wrote:
I am
rsday, March 29, 2018 2:18 AM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] KPA500 power supply
I am ready to order a KPA500 and wonder if anyone out there has regretted
operating one from 115-volt service.
Thanks and 73,
Dennis, at the moment CT9/N7DH
Sent from my i
Stewart
Sent: Thursday, March 29, 2018 7:41 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 power supply
Not a problem.
Wes N7WS
On 3/28/2018 11:17 PM, Dennis Haarsager wrote:
> I am ready to order a KPA500 and wonder if anyone out there has regretted
> operating one from 11
> (not sure why we call it 220, 'cuz i think it's actually 230v)
Because the original standard was 110/220V ... as power consumption has
increased and distribution utilities have attempted to reduce losses it
crept up to 112/224, then 115/230, 117/234 and now runs 120/240 in many
locations.
73,
As others have commented, the amp works just fine on 110v. In my case,
every dit and dah resulted in a slight but noticeable dimming of the lights
in my shack and an adjoining room. After putting in a dedicated 220V
circuit, (not sure why we call it 220, 'cuz i think it's actually 230v) no
dimmin
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