Re: [Elecraft] KPA500 mobile?

[Jim Brown]

On Fri,4/14/2017 9:06 PM, Matt Zilmer wrote:
I used Sirius in the early 2000s, and used to experience regular 
dropouts of 4 seconds in several locations on my commuteto/from work.  
Each of these areas was under a highway or freeway.


I occasionally car pool to ham events with a neighbor in his high end 
VW. He bought the satellite service, and we sometimes listen to it. It 
drops out with foliage and under overpasses. Sound quality is so bad 
that it's hard to listen to any form of acoustic music. Perhaps too much 
data compression, made worse by any problems with the signal path.


73, Jim K9YC

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Re: [Elecraft] KPA500 mobile?

[Matt Zilmer]

Sirius (at least) has terrestrial transmitters that are used to full sat 
voids, like tunnels or parts of the San Francisco or NY financial 
districts, or tall mountains near an interstate highway.  The smaller 
blockages are probably deemed a minor inconvenience, especially if 
they're out inthe countrysideor in unpopulated areas.  I used Sirius in 
the early 2000s, and used to experience regular dropouts of 4 seconds in 
several locations on my commuteto/from work.  Each of these areas was 
under a highway or freeway.


Not sure if your tunnel was private or not.  If it was, it wasn't 
covered by surface transmitters unless by accident.  There is a tunnel 
in LA that basically runs under LAX, and I never lost signal there. It's 
probably hit or miss on what's covered terrestrially.


XM (I believe) bought Sirius out, sometime in the last decade. Both 
services operate on the abandoned telco S-bandif I understand 
correctly.  I hear XM isn't doing so well financially, but that was 
probably a couple of years ago.  May not be current on this.


73,

matt W6NIA


On 4/14/2017 8:47 PM, Fred Jensen wrote:
Semi-related curiosity regarding shielding.  My wife's car has 
Sirius/XM radio.  It usually loses contact with the satellite driving 
under Interstate bridges and the like.  Likewise in the garage.  OTOH, 
at our previous home there was a tunnel through a small hill, perhaps 
1/4 mi long.  The XM worked fine through it. There are a pair of 
tunnels at Cave Rock next to Lake Tahoe through a granite mountain.  
XM works fine through them too.  Anyone know why?


73,

Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn

On 4/14/2017 2:50 PM, Phil Kane wrote:

On 4/14/2017 1:13 PM, KENT TRIMBLE wrote:

The assumption has always been that the driver and passengers are 
riding

inside a Faraday Cage and therefore are safe from RF radiated by an HF
antenna, regardless of where located and regardless of power level.

When I take my 2011 Ford Focus through the car wash, I put the mag-mount
VHF antenna inside the car but it is still connected to the radio.  I
have no problem picking up the usual 2- and 3/4- meter repeaters that
way.  So much for the "Faraday Cage".  :)

73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402



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--
"A delay is better than a disaster."
-- unknonwn

Matt Zilmer, W6NIA
[Shiraz]

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Re: [Elecraft] KPA500 mobile?

[Fred Jensen]

Semi-related curiosity regarding shielding.  My wife's car has Sirius/XM 
radio.  It usually loses contact with the satellite driving under 
Interstate bridges and the like.  Likewise in the garage.  OTOH, at our 
previous home there was a tunnel through a small hill, perhaps 1/4 mi 
long.  The XM worked fine through it. There are a pair of tunnels at 
Cave Rock next to Lake Tahoe through a granite mountain.  XM works fine 
through them too.  Anyone know why?


73,

Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn

On 4/14/2017 2:50 PM, Phil Kane wrote:

On 4/14/2017 1:13 PM, KENT TRIMBLE wrote:


The assumption has always been that the driver and passengers are riding
inside a Faraday Cage and therefore are safe from RF radiated by an HF
antenna, regardless of where located and regardless of power level.

When I take my 2011 Ford Focus through the car wash, I put the mag-mount
VHF antenna inside the car but it is still connected to the radio.  I
have no problem picking up the usual 2- and 3/4- meter repeaters that
way.  So much for the "Faraday Cage".  :)

73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402



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Re: [Elecraft] KPA500 mobile?

[Walter Underwood]

Easy to try. I live a half mile from the main Google self-driving car site. We 
see them every day. I can’t offer 220V service, but bring your KP500 over and 
we can wait for a Waymo car to get in range.

Actually, need to wait until I get the HF antenna back up. The walnut tree that 
held up one end died (sad times), so I’m working on the mast for an inverted 
vee along the fence line. Unless you want to test with a Hustler super 
resonator. Go for it.

wunder
Walter Underwood
wun...@wunderwood.org
http://observer.wunderwood.org/  (my blog)


> On Apr 14, 2017, at 6:20 PM, Mike Flowers  wrote:
> 
> I wonder what would happen if a mobile KW station keyed up beside one of 
> these experimental driverless cars?
> 
> And I wonder how well the electronics in these cars are protected from RFI?
> 
> -- Mike Flowers, K6MKF, NCDXC - "It's about DX!"
> 
>> On Apr 14, 2017, at 12:12 PM, Fred Jensen  wrote:
>> 
>> I had a 100W HF mobile in a Ford Ranger in early 2001.  Transmitting would 
>> disable the cruise control if it was on.  I gave the truck to #1 grandson 
>> when I bought a 2003 Silverado [he promptly rolled the Ranger [:-(( ].
>> 
>> The computer that operated the driver's seat exceeded the capacity/speed of 
>> the computer that got us to the moon by an order of magnitude or more and it 
>> was one of a dozen or so in the truck. I put a 25 watt UHF FM rig in it, and 
>> the first time I transmitted, the seat computer lost its mind and pinned me 
>> to the steering wheel.  $380 later, that was fixed and I resorted to an HT 
>> in the truck.
>> 
>> I wouldn't put 500 watts in today's vehicles.
>> 
>> 73,
>> 
>> Fred ("Skip") K6DGW
>> Sparks NV USA
>> Washoe County DM09dn
>> 
>> 
>> 
>>> On 4/14/2017 11:58 AM, brian wrote:
>>> In the old days, cars didn't have computers.  Getting away with running a 
>>> KW worked. Today may be different.
>>> 
>>> Nobody seems to be concerned about crashing/killing the computer(s) running 
>>> the whole car.  Could lead to a really dangerous situation.
>>> 
>>> Don't know what the replacement cost for the motherboard/peripherials of a 
>>> car computer system is.  My guess: big bucks.
>>> 
>>> What current experience is there out there?
>>> 
>>> 73 de Brian/K3KO
>>> 
>>> 
>>> 
>>> 
 On 4/14/2017 16:45 PM, Bert Craig wrote:
 Yaesu FT-891 w/
 HLA 305V @ approx. 200 W.
 http://www.rmitaly.com/index.php/en/news/92-news/19487-arrl-review-rm-italy-hla-305v-plus
  
 Vy 73 de Bert
 WA2SI
 
 Sent from my android device.
 
 -Original Message-
 From: Mike Smith VE9AA 
 To: Elecraft@mailman.qth.net
 Sent: Fri, 14 Apr 2017 12:00
 Subject: [Elecraft] KPA500 mobile?
 
 Big fan of mobile ham radio here...Have always run 100w.
 
 Would like to do more. (500w-1000w)
 
 
 
 Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to
 generate 15a @ 115ac?)
 
 
 
 Related question...if you haven't run a KPA500 mobile, what amp HAVE you 
 run
 mobile?
 
 
 
 Thanks
 
 
 
 Mike VE9AA...VE9AA/m
 
 
 
 Mike, Coreen & Corey
 
 Keswick Ridge, NB
 
 
 
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Re: [Elecraft] KPA500 mobile?

[Mike Flowers]

I wonder what would happen if a mobile KW station keyed up beside one of these 
experimental driverless cars?

And I wonder how well the electronics in these cars are protected from RFI?

-- Mike Flowers, K6MKF, NCDXC - "It's about DX!"

> On Apr 14, 2017, at 12:12 PM, Fred Jensen  wrote:
> 
> I had a 100W HF mobile in a Ford Ranger in early 2001.  Transmitting would 
> disable the cruise control if it was on.  I gave the truck to #1 grandson 
> when I bought a 2003 Silverado [he promptly rolled the Ranger [:-(( ].
> 
> The computer that operated the driver's seat exceeded the capacity/speed of 
> the computer that got us to the moon by an order of magnitude or more and it 
> was one of a dozen or so in the truck. I put a 25 watt UHF FM rig in it, and 
> the first time I transmitted, the seat computer lost its mind and pinned me 
> to the steering wheel.  $380 later, that was fixed and I resorted to an HT in 
> the truck.
> 
> I wouldn't put 500 watts in today's vehicles.
> 
> 73,
> 
> Fred ("Skip") K6DGW
> Sparks NV USA
> Washoe County DM09dn
> 
> 
> 
>> On 4/14/2017 11:58 AM, brian wrote:
>> In the old days, cars didn't have computers.  Getting away with running a KW 
>> worked. Today may be different.
>> 
>> Nobody seems to be concerned about crashing/killing the computer(s) running 
>> the whole car.  Could lead to a really dangerous situation.
>> 
>> Don't know what the replacement cost for the motherboard/peripherials of a 
>> car computer system is.  My guess: big bucks.
>> 
>> What current experience is there out there?
>> 
>> 73 de Brian/K3KO
>> 
>> 
>> 
>> 
>>> On 4/14/2017 16:45 PM, Bert Craig wrote:
>>> Yaesu FT-891 w/
>>> HLA 305V @ approx. 200 W.
>>> http://www.rmitaly.com/index.php/en/news/92-news/19487-arrl-review-rm-italy-hla-305v-plus
>>>  
>>> Vy 73 de Bert
>>> WA2SI
>>> 
>>> Sent from my android device.
>>> 
>>> -Original Message-
>>> From: Mike Smith VE9AA 
>>> To: Elecraft@mailman.qth.net
>>> Sent: Fri, 14 Apr 2017 12:00
>>> Subject: [Elecraft] KPA500 mobile?
>>> 
>>> Big fan of mobile ham radio here...Have always run 100w.
>>> 
>>> Would like to do more. (500w-1000w)
>>> 
>>> 
>>> 
>>> Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to
>>> generate 15a @ 115ac?)
>>> 
>>> 
>>> 
>>> Related question...if you haven't run a KPA500 mobile, what amp HAVE you run
>>> mobile?
>>> 
>>> 
>>> 
>>> Thanks
>>> 
>>> 
>>> 
>>> Mike VE9AA...VE9AA/m
>>> 
>>> 
>>> 
>>> Mike, Coreen & Corey
>>> 
>>> Keswick Ridge, NB
>>> 
>>> 
>>> 
>>> __
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> 
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Re: [Elecraft] KPA500 mobile?

[Clay Autery]

I suspect that the dwell time would be small enough for most folks you
crossed paths with that you'd probably be safe (need to do the math anyway).

For cars going the same direction as you, you as the control operator,
have to make sure you don't irradiate anyone else around you beyond the
limits

Besides installation accommodations, you can control exposure by
manually maintaining a sufficient "bubble" around you during
transmission (extended transmission... whatever the math tells you.

I don't have a feel for where we are generally "safe" mobile...  For
myself, I would have to do an actual test as installed and
measure/observe and plot.

Another excellent question  of course you should ask.

Not a trivial engineering task IF you want to do it correctly.  :)

__
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MONTAC Enterprises
(318) 518-1389

On 4/14/2017 2:39 PM, Lynn W. Taylor, WB6UUT wrote:
> I wonder if the exposure to passing cars is below the limit with a
> Hustler or similar antenna on the rear bumper?
>
> Are we good at 100w, 1000w?
>
> Should I have not asked this question?

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[Elecraft] New release of Win4K3Suite

[Tom]

Hello,
There is a new release of Win4K3Suite.  This version allows a user to assign 
different message files to a particular mode for the CW, PSK and FSK terminal.  
Changing modes will automatically load the correct file.  Please see the 
release notes under Documentation at va2fsq.com.
In addition, control of the KPA500 has been moved to a different thread in the 
software with the result that information such as power output, SWR, etc is now 
provided in near real time.
In case you are not aware, Win4K3Suite is a comprehensive control program for 
the Elecraft K3, K3S, KX3 and KX2.  It supports all hardware such as the 
KPA500, and KAT500 even on the KX2.
Win4K3Suite has built in panadapter support for the P3, LPPAN and the SDRPlay 
RSP1 and RSP2. There is no configuration necessary to support all modes and 
filter settings for QSY's.
You can sere Win4K3Suite in action here: 
https://www.youtube.com/results?search_query=win4k3suite and read some reviews 
at http://www.eham.net/reviews/detail/11214

There is a fully functional 30 day trial available at va2fsq.com
73 Tom

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Re: [Elecraft] KPA500 mobile?

[Wes Stewart]

I am reminded of when I (actually my employer and you taxpayers) bought a 
shielded room to enclose "my" RF laboratory.  This was modular, 16' x 20' x 10' 
and composed of 2" thick particle board, clad on both sides with tin-plated 
sheet steel.  Because I needed to be able to move a rack mounted test position 
with a table top in and out, I specified a four-foot wide door.


The door was constructed similarly with a brass frame around the door and was 
prehung in a brass jam and massive hinges.  It was installed using a forklift to 
position it while the fasteners were tightened.  The jam had a continuous 
channel around the periphery that housed a double row of beryllium-copper finger 
stock backed up by conductive foam.  The door frame had a brass "knife-edge" 
around the periphery that drove into and was pinched by the finger stock in the 
jam.


On of the specs that I remember was 120 dB of isolation at 10 Ghz.  We measured 
this by setting up a source with a horn antenna on a tripod outside the room 
with another horn and LNA into a spectrum analyzer inside the room.  We 
normalized the path with the door open and the horns aligned and then closed the 
door and measured the difference.  It made 120 dB, but just barely; this is not 
a trivial achievement.


To drive home the necessity of maintenance, the vendor engineer said, "Watch 
this."  He took a dollar bill out of his wallet and laid it across the finger 
stock and then closed the door.  I don't remember the exact number but it was 
yuge; the attenuation went down 30 or 40 dB just from breaking the connection of 
the knife edge with the finger stock over the width of a dollar bill. (For what 
this room cost, he should have been using a c-note.)


Wes  N7WS



On 4/14/2017 1:33 PM, Jim Brown wrote:

On Fri,4/14/2017 1:13 PM, KENT TRIMBLE wrote:
The assumption has always been that the driver and passengers are riding 
inside a Faraday Cage 


There are HUGE holes in that assumption in the form of non-metallic parts and 
paint preventing contact between metal parts. An enclosure forms a Faraday 
cage ONLY if it is continuous. and ONLY if all conductors penetrating it have 
either a feed-through to the enclosure or, if a shielded conductor, the shield 
is bonded to the enclosure at the point of entry.


Modern vehicles have lots of paint between metal parts. When I used Hamsticks 
on my Volvo S80, I had to bond the mount to the trunk, and I had to bond 
around the trunk hinges.


73, Jim K9YC

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Re: [Elecraft] KPA500 mobile?

[Phil Kane]

On 4/14/2017 1:13 PM, KENT TRIMBLE wrote:

> The assumption has always been that the driver and passengers are riding
> inside a Faraday Cage and therefore are safe from RF radiated by an HF
> antenna, regardless of where located and regardless of power level. 

When I take my 2011 Ford Focus through the car wash, I put the mag-mount
VHF antenna inside the car but it is still connected to the radio.  I
have no problem picking up the usual 2- and 3/4- meter repeaters that
way.  So much for the "Faraday Cage".  :)

73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402

>From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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[Elecraft] Elecraft K3 For Sale

[Carl Jón Denbow]

PRICE REDUCED:

I have many Elecraft products, including a K3s, so I find the following excess 
to my needs and, therefore, on the sale block.
Elecraft K3-100, SN: 0676, upgraded to many of features of the K3s. Contains 
filters -- KFL3A-250, KFL3A-6K, AND KFL3A-2.8K, is in good condition and fully 
functional. When I bought this rig both side panels were heavily scratched. I 
replaced the panels as well as most screws with stainless steel screws, and the 
rig is now a 9 out 10 cosmetically. Rig was back at the factory last November 
(11/17/2016 invoice date) and at that time was upgraded with KIO3B, KXV3B, and 
KSYN3A and the previously mentioned 2.8 filter. Also a number of updates were 
performed at that time so that when it left factory it was certified to "meet 
or exceed all factory specifications." [Cost of upgrades: $1,343.55.] 
In addition to the above, sold with following extra features:
KAT3A Auto Tuner
KPA100 100 watt amplifier module
KFL3A-250Hz KDVR 
Your Price: $2,400, shipped your CONUS QTH.

Sent from my iPhone
===
Carl Jón Denbow, N8VZ
17 Coventry Lane
Athens, Ohio 45701-3718

c...@n8vz.com
www.n8vz.com
EM89wh

IRLP 4533   Echolink 116070

PSK and JT65 Forever!
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Re: [Elecraft] KPA500 mobile?

[KENT TRIMBLE]

Hi Jim . . .

That was my point, although without mentioning the paint.

I should have said "worth RE-considering."

Kent


On 4/14/2017 3:33 PM, Jim Brown wrote:

On Fri,4/14/2017 1:13 PM, KENT TRIMBLE wrote:
The assumption has always been that the driver and passengers are 
riding inside a Faraday Cage 


There are HUGE holes in that assumption in the form of non-metallic 
parts and paint preventing contact between metal parts. An enclosure 
forms a Faraday cage ONLY if it is continuous. and ONLY if all 
conductors penetrating it have either a feed-through to the enclosure 
or, if a shielded conductor, the shield is bonded to the enclosure at 
the point of entry.


Modern vehicles have lots of paint between metal parts. When I used 
Hamsticks on my Volvo S80, I had to bond the mount to the trunk, and I 
had to bond around the trunk hinges.


73, Jim K9YC

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Re: [Elecraft] KPA500 mobile?

[Jim Brown]

On Fri,4/14/2017 1:13 PM, KENT TRIMBLE wrote:
The assumption has always been that the driver and passengers are 
riding inside a Faraday Cage 


There are HUGE holes in that assumption in the form of non-metallic 
parts and paint preventing contact between metal parts. An enclosure 
forms a Faraday cage ONLY if it is continuous. and ONLY if all 
conductors penetrating it have either a feed-through to the enclosure 
or, if a shielded conductor, the shield is bonded to the enclosure at 
the point of entry.


Modern vehicles have lots of paint between metal parts. When I used 
Hamsticks on my Volvo S80, I had to bond the mount to the trunk, and I 
had to bond around the trunk hinges.


73, Jim K9YC

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Re: [Elecraft] KPA500 mobile?

[KENT TRIMBLE]

The assumption has always been that the driver and passengers are riding 
inside a Faraday Cage and therefore are safe from RF radiated by an HF 
antenna, regardless of where located and regardless of power level.  The 
truth of that assumption, coupled with how much shielding a vehicle 
actually presents, is worth considering.  Until the RF Exposure business 
came along, no one considered safety for those outside the car.


Less and less body-metal, roofs made entirely of glass, more electronics 
both on and inside human bodies (over and above the vehicle's 
electronics), the close proximity of the antenna . . . all of which, in 
my opinion, argue for a re-think of high-power mobile operation.


In the 1970s I greatly enjoyed mobile CW with an FT-101E until my first 
child started occupying the rear seat.  After she came along, I opted 
for no further mobile work of any kind, at least when she and her 
siblings were in the car.  I'm not a geneticist, but neither am I 
willing to push my luck with the gazillion of cell-divisions going on 
every second in a child's growing body.


Excellent question to ask, Lynn.

73,

Kent  K9ZTV



On 4/14/2017 2:39 PM, Lynn W. Taylor, WB6UUT wrote:
A few days ago we talked about the RF exposure rules related to 
Amateur Radio, and how we all had to sign that we complied with those 
rules when we renew our tickets.


I wonder if the exposure to passing cars is below the limit with a 
Hustler or similar antenna on the rear bumper?


Are we good at 100w, 1000w?

Should I have not asked this question?

73 -- Lynn



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Re: [Elecraft] KPA500 mobile?

[David Olean]

Hi Mike

I am running the KPA-500 now on battery power. It isn't mobile, but 
it could be with the same hardware. The method I use is a 115  volt AC 
inverter that runs off a 12 volt battery. I use the Xantrex Prosine Pure 
Sine Wave 1800 watt inverter.


https://www.amazon.com/Xantrex-Technologies-1800PS-1800-Watt/dp/B225DC

This unit is crystal controlled and does not generate much RFI at all.  
It does require huge input wiring and some substantial battery capacity. 
I see 75+ amps on CW peaks, and to keep the regulation OK, the stranded 
wire is about 3/4" in diameter and very short between the battery and 
the inverter. I also have a 200 amp safety fuse in line as well. It has 
worked great with two 275 AH solar batteries and you would not even know 
you were running on batteries. The output of the sinewave inverter is 
quite solid at around 117 vac.  It has been in use for a few years.  No 
problems.  I would run two moosey batteries besides the auto battery and 
install a new alternator in your vehicle for charging the batteries. I 
use solar panels here for charging, and on a sunny day see about 25 amps 
charging the batteries between transmissions.  I can run all day on a 
sunny day, and about 10 or maybe 12 hours casual operating at night with 
just the batteries. It is pricey, but cool. I use the KPA-500 on six 
meters too and have been able to catch openings and work plenty of DX 
with the solar power.


Dave K1WHS


On 4/14/2017 4:00 PM, Mike Smith VE9AA wrote:

Big fan of mobile ham radio here...Have always run 100w.

Would like to do more. (500w-1000w)

  


Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to
generate 15a @ 115ac?)

  


Related question...if you haven't run a KPA500 mobile, what amp HAVE you run
mobile?

  


Thanks

  


Mike VE9AA...VE9AA/m

  


Mike, Coreen & Corey

Keswick Ridge, NB

  


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Re: [Elecraft] KPA500 mobile?

[Lynn W. Taylor, WB6UUT]

A few days ago we talked about the RF exposure rules related to Amateur 
Radio, and how we all had to sign that we complied with those rules when 
we renew our tickets.


I wonder if the exposure to passing cars is below the limit with a 
Hustler or similar antenna on the rear bumper?


Are we good at 100w, 1000w?

Should I have not asked this question?

73 -- Lynn

On 4/14/2017 12:05 PM, Phil Wheeler wrote:

And then there's the car's electronics. Some modern ones don't react
well to high power RF. I had one which didn't like 100 W -- though
backing off to 50 W made all things OK.

Phil W7OX

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Re: [Elecraft] KPA500 mobile?

[a45wg]

On the same vane,

   My 2005, Range Rover would lock and unlock (repeat….) when I transmitted on 
20M - other bands it was fine.

  I was running 50W - totally separate 12V Truck battery , not connected to the 
Range Rover. Antenna 1:1  

 Enjoy the ride !

Regards

Tim
   A45wg

> On Apr 14, 2017, at 11:12 PM, Fred Jensen  wrote:
> 
> I had a 100W HF mobile in a Ford Ranger in early 2001.  Transmitting would 
> disable the cruise control if it was on.  I gave the truck to #1 grandson 
> when I bought a 2003 Silverado [he promptly rolled the Ranger [:-(( ].
> 
> The computer that operated the driver's seat exceeded the capacity/speed of 
> the computer that got us to the moon by an order of magnitude or more and it 
> was one of a dozen or so in the truck. I put a 25 watt UHF FM rig in it, and 
> the first time I transmitted, the seat computer lost its mind and pinned me 
> to the steering wheel.  $380 later, that was fixed and I resorted to an HT in 
> the truck.
> 
> I wouldn't put 500 watts in today's vehicles.
> 
> 73,
> 
> Fred ("Skip") K6DGW
> Sparks NV USA
> Washoe County DM09dn
> 
> 
> 
> On 4/14/2017 11:58 AM, brian wrote:
>> In the old days, cars didn't have computers.  Getting away with running a KW 
>> worked. Today may be different.
>> 
>> Nobody seems to be concerned about crashing/killing the computer(s) running 
>> the whole car.  Could lead to a really dangerous situation.
>> 
>> Don't know what the replacement cost for the motherboard/peripherials of a 
>> car computer system is.  My guess: big bucks.
>> 
>> What current experience is there out there?
>> 
>> 73 de Brian/K3KO
>> 
>> 
>> 
>> 
>> On 4/14/2017 16:45 PM, Bert Craig wrote:
>>> Yaesu FT-891 w/
>>> HLA 305V @ approx. 200 W.
>>> http://www.rmitaly.com/index.php/en/news/92-news/19487-arrl-review-rm-italy-hla-305v-plus
>>>  
>>> Vy 73 de Bert
>>> WA2SI
>>> 
>>> Sent from my android device.
>>> 
>>> -Original Message-
>>> From: Mike Smith VE9AA 
>>> To: Elecraft@mailman.qth.net
>>> Sent: Fri, 14 Apr 2017 12:00
>>> Subject: [Elecraft] KPA500 mobile?
>>> 
>>> Big fan of mobile ham radio here...Have always run 100w.
>>> 
>>> Would like to do more. (500w-1000w)
>>> 
>>> 
>>> 
>>> Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to
>>> generate 15a @ 115ac?)
>>> 
>>> 
>>> 
>>> Related question...if you haven't run a KPA500 mobile, what amp HAVE you run
>>> mobile?
>>> 
>>> 
>>> 
>>> Thanks
>>> 
>>> 
>>> 
>>> Mike VE9AA...VE9AA/m
>>> 
>>> 
>>> 
>>> Mike, Coreen & Corey
>>> 
>>> Keswick Ridge, NB
>>> 
>>> 
>>> 
>>> __
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>>> 
>>> This list hosted by: http://www.qsl.net
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>>> Message delivered to wa...@arrl.net
>>> __
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>>> Message delivered to als...@comcast.net
>>> 
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>> 
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>> 
>> 
> 
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Re: [Elecraft] KPA500 mobile?

[Fred Jensen]

I had a 100W HF mobile in a Ford Ranger in early 2001.  Transmitting 
would disable the cruise control if it was on.  I gave the truck to #1 
grandson when I bought a 2003 Silverado [he promptly rolled the Ranger 
[:-(( ].


The computer that operated the driver's seat exceeded the capacity/speed 
of the computer that got us to the moon by an order of magnitude or more 
and it was one of a dozen or so in the truck. I put a 25 watt UHF FM rig 
in it, and the first time I transmitted, the seat computer lost its mind 
and pinned me to the steering wheel.  $380 later, that was fixed and I 
resorted to an HT in the truck.


I wouldn't put 500 watts in today's vehicles.

73,

Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn



On 4/14/2017 11:58 AM, brian wrote:
In the old days, cars didn't have computers.  Getting away with 
running a KW worked. Today may be different.


Nobody seems to be concerned about crashing/killing the computer(s) 
running the whole car.  Could lead to a really dangerous situation.


Don't know what the replacement cost for the motherboard/peripherials 
of a car computer system is.  My guess: big bucks.


What current experience is there out there?

73 de Brian/K3KO




On 4/14/2017 16:45 PM, Bert Craig wrote:

Yaesu FT-891 w/
HLA 305V @ approx. 200 W.
http://www.rmitaly.com/index.php/en/news/92-news/19487-arrl-review-rm-italy-hla-305v-plus 


Vy 73 de Bert
WA2SI

Sent from my android device.

-Original Message-
From: Mike Smith VE9AA 
To: Elecraft@mailman.qth.net
Sent: Fri, 14 Apr 2017 12:00
Subject: [Elecraft] KPA500 mobile?

Big fan of mobile ham radio here...Have always run 100w.

Would like to do more. (500w-1000w)



Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to
generate 15a @ 115ac?)



Related question...if you haven't run a KPA500 mobile, what amp HAVE 
you run

mobile?



Thanks



Mike VE9AA...VE9AA/m



Mike, Coreen & Corey

Keswick Ridge, NB



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Re: [Elecraft] KPA500 mobile?

[Phil Wheeler]

And then there's the car's electronics. Some 
modern ones don't react well to high power RF. I 
had one which didn't like 100 W -- though backing 
off to 50 W made all things OK.


Phil W7OX

On 4/14/17 10:27 AM, Ron D'Eau Claire wrote:

One issue with mobile QRO is the antenna. While a mobile whip/loading coil 
combo can be designed for high power, it becomes difficult to prevent corona 
discharge from the end of the whip while transmitting at high power.

One fairly common solution decades ago was to mount a copper toilet tank float 
on the end of the antenna. Of course the wind resistance then required guying 
the whip. Since it was typically on the rear of the car, a nylon cord from the 
mid-point to somewhere forward on the roof was common.

Another approach - back when car bodies were steel - was to extend the whip to 
it could be bent over and tied to the front bumper, turning the car body and 
whip into a small loop antenna.

Today, it might be hard to establish the necessary distance from the antenna 
while sitting in the car to meet modern RF exposure limits, especially on 20 
meters and up.

I never went QRO in my car, but had buddies who tinkered with it way back when vacuum tubes were 
"king". Back then I lived in the land of the "California Kilowatt" (Southern 
Calif.). They mounted outboard generators on their car engines to handle the power demand. Adding 
filaments, etc., a kW mobile station might require 1.5 or 2 kW of d.c. power to run it. Got a 
chuckle out of them when they'd key the mic to transmit while sitting at a stop light with the 
engine at idle, and the sudden added power demand caused the engine to stall.

73, Ron AC7AC


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Re: [Elecraft] KPA500 mobile?

[brian]

In the old days, cars didn't have computers.  Getting away with running 
a KW worked. Today may be different.


Nobody seems to be concerned about crashing/killing the computer(s) 
running the whole car.  Could lead to a really dangerous situation.


Don't know what the replacement cost for the motherboard/peripherials of 
a car computer system is.  My guess: big bucks.


What current experience is there out there?

73 de Brian/K3KO




On 4/14/2017 16:45 PM, Bert Craig wrote:

Yaesu FT-891 w/
HLA 305V @ approx. 200 W.
http://www.rmitaly.com/index.php/en/news/92-news/19487-arrl-review-rm-italy-hla-305v-plus
Vy 73 de Bert
WA2SI

Sent from my android device.

-Original Message-
From: Mike Smith VE9AA 
To: Elecraft@mailman.qth.net
Sent: Fri, 14 Apr 2017 12:00
Subject: [Elecraft] KPA500 mobile?

Big fan of mobile ham radio here...Have always run 100w.

Would like to do more. (500w-1000w)



Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to
generate 15a @ 115ac?)



Related question...if you haven't run a KPA500 mobile, what amp HAVE you run
mobile?



Thanks



Mike VE9AA...VE9AA/m



Mike, Coreen & Corey

Keswick Ridge, NB



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Re: [Elecraft] KPA500 mobile?

[RIchard Williams via Elecraft]

Back in the 80's and early 90's, I ran a KW mobile SSB, and never had any 
negative issues.  I used the Hustler Super Resonators (still made and in use by 
many today), and they are rated at 1KW.   I can't remember what automobiles I 
installed it in, but I remember using a much larger battery, and a larger 
alternator.  Was not a good idea to use it with the car not running  
In fact, I still have the amp in the closet; it is a Magnus MA1000B, ran on 12V 
(with the car running, 13.4 or so) and used eight, 31003OD Power Transistors.  
Requires about 60 Watts, for 1000W input.
Dick, K8ZTT



  From: Ron D'Eau Claire 
 To: 'Mike Smith VE9AA'  
Cc: Elecraft@mailman.qth.net
 Sent: Friday, April 14, 2017 11:28 AM
 Subject: Re: [Elecraft] KPA500 mobile?
   
One issue with mobile QRO is the antenna. While a mobile whip/loading coil 
combo can be designed for high power, it becomes difficult to prevent corona 
discharge from the end of the whip while transmitting at high power. 

One fairly common solution decades ago was to mount a copper toilet tank float 
on the end of the antenna. Of course the wind resistance then required guying 
the whip. Since it was typically on the rear of the car, a nylon cord from the 
mid-point to somewhere forward on the roof was common. 

Another approach - back when car bodies were steel - was to extend the whip to 
it could be bent over and tied to the front bumper, turning the car body and 
whip into a small loop antenna. 

Today, it might be hard to establish the necessary distance from the antenna 
while sitting in the car to meet modern RF exposure limits, especially on 20 
meters and up. 

I never went QRO in my car, but had buddies who tinkered with it way back when 
vacuum tubes were "king". Back then I lived in the land of the "California 
Kilowatt" (Southern Calif.). They mounted outboard generators on their car 
engines to handle the power demand. Adding filaments, etc., a kW mobile station 
might require 1.5 or 2 kW of d.c. power to run it. Got a chuckle out of them 
when they'd key the mic to transmit while sitting at a stop light with the 
engine at idle, and the sudden added power demand caused the engine to stall.

73, Ron AC7AC


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Re: [Elecraft] KPA500 mobile?

[Wes Stewart]

Not me personally but my Elmer, the late W7UVR, back in the AM days ran a 
high-level modulated 4-1000A.


I've got his QSLs around here someplace, but in the meantime someone else has 
posted them too: http://hamgallery.com/qsl/country/USA/Washington/w7uvr.htm


He later converted to SSB, increased the generator to 15KW, had another ham 
friend cut up and build beautiful tubular hinges to fold the elements of a 
3-element tribander for travel.


The home station was equally impressive, although until Collins introduced their 
noise blanker, was primarily used to transmit bulletins or code practice.  The 
mobile rig was the answer to the noise problem before that.


Wes  N7WS

On 4/14/2017 9:00 AM, Mike Smith VE9AA wrote:

Related question...if you haven't run a KPA500 mobile, what amp HAVE you run
mobile?


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Re: [Elecraft] KPA500 mobile?

[Ron D'Eau Claire]

One issue with mobile QRO is the antenna. While a mobile whip/loading coil 
combo can be designed for high power, it becomes difficult to prevent corona 
discharge from the end of the whip while transmitting at high power. 

One fairly common solution decades ago was to mount a copper toilet tank float 
on the end of the antenna. Of course the wind resistance then required guying 
the whip. Since it was typically on the rear of the car, a nylon cord from the 
mid-point to somewhere forward on the roof was common. 

Another approach - back when car bodies were steel - was to extend the whip to 
it could be bent over and tied to the front bumper, turning the car body and 
whip into a small loop antenna. 

Today, it might be hard to establish the necessary distance from the antenna 
while sitting in the car to meet modern RF exposure limits, especially on 20 
meters and up. 

I never went QRO in my car, but had buddies who tinkered with it way back when 
vacuum tubes were "king". Back then I lived in the land of the "California 
Kilowatt" (Southern Calif.). They mounted outboard generators on their car 
engines to handle the power demand. Adding filaments, etc., a kW mobile station 
might require 1.5 or 2 kW of d.c. power to run it. Got a chuckle out of them 
when they'd key the mic to transmit while sitting at a stop light with the 
engine at idle, and the sudden added power demand caused the engine to stall.

73, Ron AC7AC


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Re: [Elecraft] KPA500 mobile?

[Jim Brown]

George Wallner, AA7JV, is a superb engineer and has done a half dozen 
DXpeditions to islands around the world. For one of his most recent, he 
used SGC amps so that he could run on batteries that were recharged by a 
small generator running in Economy mode, greatly reducing the quantity 
of fuel that he had to carry on the boat.


Your advice regarding the alternator, battery, and DC wiring is also 
quite important.


73, Jim K9YC

On Fri,4/14/2017 9:45 AM, Phil Hystad wrote:

  Not sure if the SGC SG-500 is still
available though, I heard a while back that SGC had stopped production but it 
still appears on
their web sitehttp://www.sgcworld.com/ampProductPage.html.



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Re: [Elecraft] Help me choose my first HF rig

[Jim Brown]

I strongly agree with that. The used K3 that was listed here a few days 
ago would be a great choice. When I got back on the air in 2003 after a 
long time off, I bought a used Omni V, then a TS-850, and later an 
FT-1000MP. For all but the MP, I was able to sell the rig for close to 
what I paid. The two K3s I own are the only rigs I've bought new since a 
Ten Tec Omni D in 1980.


73, Jim K9YC

On Fri,4/14/2017 9:40 AM, Alan Bloom wrote:
If money is an issue (i.e. you're not part of the 1%), then I think 
buying a used rig is a great way to go.  If you don't like it or 
decide to upgrade then you can sell it for close to what you paid for 
it. Think of it as renting a radio while you get some operating 
experience. After you've been on the air for a year or so, you will 
have a much better idea of what you want and can make a more-informed 
purchase.


Something like a used K2/100 would make a great starter rig



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Re: [Elecraft] KPA500 mobile?

[Phil Hystad]

Years ago I looked into the idea of running 500 watts mobile and my amp of 
interest
was the SGC SG-500 SmartPowerCube amplifier.  Since the SGC company was just
a 20 minute drive from my home I decided to go there and see if I could find 
someone
technical to talk to.  I did talk with one of the technicians.

What I learned was, most people who use this Amp mobile usually use a second 
battery to run the amps
current demand of 40 amps with peaks up close to 90 amps for key down full 
power.
The assumption is that the duty cycle is low enough to allow the Alternator to 
maintain
charge on the battery simultaneously with providing raw power itself.

The implementation though required heavy duty wiring from the main vehicle 
battery/alternator
source with diodes in line that are obviously high-current and thus pricey.  
Also, some vehicles
may have need to upgrade their Alternator although on my 3/4 ton pickup truck, 
I already had
an oversized alternator in place.

I had my truck wired to handle the current draw and this was done at one of 
those “car” 
electronics shops who do this regularly for guys (usually guys) who want big 
hunking audio
amps in their cars that also demand high current power.  So, this kind of 
installation was 
a regular day at work for that store (called Car Toys, Washington State and 
maybe other locations).

However, I never did buy the amp — kept putting it off and stayed with 100 
watts of power
and eventually (two years ago) opted out of mobile operation in favor of 
portable operation and
instead of 500 watts, primarily 5 watts or whatever I would put out with my 
KX1, KX3, and now
KX2 (but have not had the KX2 long enough to work in the field portable).

But, the idea of running the KPA500 because it runs off of 120 VAC is not 
something I would
ever try just because of the hassle.  I would get another suitable 500 watt 
class amp if I were
still into that and leave my KPA500 fixed in the shack.  Not sure if the SGC 
SG-500 is still
available though, I heard a while back that SGC had stopped production but it 
still appears on
their web site http://www.sgcworld.com/ampProductPage.html.

73, phil, K7PEH


> On Apr 14, 2017, at 9:00 AM, Mike Smith VE9AA  wrote:
> 
> Big fan of mobile ham radio here...Have always run 100w.
> 
> Would like to do more. (500w-1000w)
> 
> 
> 
> Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to
> generate 15a @ 115ac?)
> 
> 
> 
> Related question...if you haven't run a KPA500 mobile, what amp HAVE you run
> mobile?
> 
> 
> 
> Thanks
> 
> 
> 
> Mike VE9AA...VE9AA/m
> 
> 
> 
> Mike, Coreen & Corey
> 
> Keswick Ridge, NB
> 
> 
> 
> __
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> Message delivered to phys...@mac.com

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Re: [Elecraft] KPA500 mobile?

[Bert Craig]

Yaesu FT-891 w/
HLA 305V @ approx. 200 W.
http://www.rmitaly.com/index.php/en/news/92-news/19487-arrl-review-rm-italy-hla-305v-plus
Vy 73 de Bert
WA2SI

Sent from my android device.

-Original Message-
From: Mike Smith VE9AA 
To: Elecraft@mailman.qth.net
Sent: Fri, 14 Apr 2017 12:00
Subject: [Elecraft] KPA500 mobile?

Big fan of mobile ham radio here...Have always run 100w.

Would like to do more. (500w-1000w)

 

Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to
generate 15a @ 115ac?)

 

Related question...if you haven't run a KPA500 mobile, what amp HAVE you run
mobile?

 

Thanks

 

Mike VE9AA...VE9AA/m

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

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Re: [Elecraft] Help me choose my first HF rig

[Alan Bloom]

On 04/14/2017 03:20 AM, aj4tf wrote:

You will not regret an Elecraft purchase even if it is your first radio.


This thread is getting pretty long but I can't help but chime in.

If money is an issue (i.e. you're not part of the 1%), then I think 
buying a used rig is a great way to go.  If you don't like it or decide 
to upgrade then you can sell it for close to what you paid for it. 
Think of it as renting a radio while you get some operating experience. 
After you've been on the air for a year or so, you will have a much 
better idea of what you want and can make a more-informed purchase.


Something like a used K2/100 would make a great starter rig.

Alan N1AL
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[Elecraft] KPA500 mobile?

[Mike Smith VE9AA]

Big fan of mobile ham radio here...Have always run 100w.

Would like to do more. (500w-1000w)

 

Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to
generate 15a @ 115ac?)

 

Related question...if you haven't run a KPA500 mobile, what amp HAVE you run
mobile?

 

Thanks

 

Mike VE9AA...VE9AA/m

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

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Re: [Elecraft] Help me choose my first HF rig

[aj4tf]

You will not regret an Elecraft purchase even if it is your first radio.  As
a comparatively newer ham (licensed in 2009) I struggled a bit when trying
to decide on an HF rig.   After more than one conversation with Don (at
local NC hamfests) I opted for the K2, mainly because I like to build
things.  You can't get much more hands-on than the K2... it comes as  boxes
of electronic components!   Of course if that is not your thing, then you
can pay others to put it together.  I used the K2 regularly until 2016, when
I finally sprung for the K3S (kit, of course).  Although not a kit in the
sense of the K2, it's more like building a computer.   Now the K2 is sitting
quietly,  waiting for the next Field Day outing.   I occasionally turn it
on, just so it won't get lonely.

As those who know me have heard me say many times,  I am definitely not a
contester,  I am a casual operator.  I am still figuring stuff out about the
K3S,  but it is a fantastic piece of engineering. Yes,  it is more expensive
than a basic Yawoodcom.  But the performance is head and shoulders above
most rigs.  And the support from both the factory, and found here on this
list,  cannot be beat.  

To the OP:  Buy quality and only cry once. :-)

David AJ4TF





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