Re: [Elecraft] K3 tx power troubles

[Martin Sole]

Hi Bill,

I have the K3 working again, currently going great stuff on 10m to give 
it a good workout. Problem was one of those silly ones but also one that 
I have just recently read about on the reflector, the case of a loose 
TMP coax. In my case it turned out to be J7 on the KREF3 board.


Martin, HS0ZED




On 3/6/63 00:42, William Hammond wrote:
https://ftp.elecraft.com/K3/Manuals%20Downloads/E740182%20KPA3CONMDKT%20Instruction%20Manual.pdf 



This describes the process...

The parts needed are described on the first page of the document...

73, Bill-AK5X

On Jun 2, 2020, at 10:17 AM, Martin Sole > wrote:


My aging K3, S/N 298, is once again proving a little troublesome. 
Into a nice solid 50 ohm dummy load with a strong 14 volt supply and 
short thick cables never known to be an issue I see a maximum of 
about 10 watts out when set to 110 watts on the front panel. Starting 
at 0w it increases in line with the setting until about 3.5 watts. 
The LPA stops there and then when the KPA3 comes in it goes up to 
about 10 watts but beyond that no further increase.


I presume this is a either a drive or and LPA issue but I suspect the 
actual cause might be well known here. What are the chances?



Regards
Martin, HS0ZED


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Re: [Elecraft] FIXED--was NOT the feedline

[Grant Youngman]

The only thing that would concern me about buying this (NOS) material of 
unknown date of manufacture from eBay is that it does have a shelf life of 5 
years in its pre-stretched state when properly stored (50-80 deg F at less than 
75% relative humidity).  If it’s been stored in someone’s hot humid garage or 
been rattling around in a tool box in a pickup bed in the sun for a couple of 
years before it hits the auction site, there’s no telling.  I suspect at some 
point it won’t shrink as much as the specification.  But it is less expensive 
from most sellers than the retail pricing.

Grant NQ5T

> On Jun 6, 2020, at 12:26 AM, donov...@starpower.net wrote:
> 
> Cold shrink tubing is widely available on eBay, usually about ten dollars 
> each 
> 
> - Original Message -
> 

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[Elecraft] K3 Spontaneous Failure

[w4sc]

Jim,

1) Try an EEINIT ref pp66 of K3 owners manual rev D10.
2) Try to force a firmware down load, ref pp45 of K3 owners manual rev D10.

73 de Ben W4SC

Sent from Mail for Windows 10

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Re: [Elecraft] K3 Spontaneous Failure

[Jim McCook]

Ted, thanks for the note.  I checked the error list immediately after 
the failure and thought about that EPROM failure as a possibility.  The 
power supply is fine.  The radio had been powered up and failed while I 
had dinner.  I know there are some pin connectors to the front panel 
that could be the problem, but I don't want to attempt to pull it off, 
so will probably wind up sending it to the EC hospital for a general 
face lift in addition to the fix unless there is a simple fix.  I doubt 
one exists.  Thanks, Jim

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Re: [Elecraft] FIXED--was NOT the feedline

[donovanf]

Cold shrink tubing is widely available on eBay, usually about ten dollars each 

- Original Message -

From: "Peter Dougherty"  
To: donov...@starpower.net, "Elecraft Reflector"  
Sent: Friday, June 5, 2020 4:13:03 PM 
Subject: RE: [Elecraft] FIXED--was NOT the feedline 

First time I've ever heard of this product and it's quite intriguing. Where 
is this available from in quantities a typical home station would use? I go 
through a 3 foot section of .75" marine grade heat shrink in about 3-5 
years. 

- pjd 

-Original Message- 
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of donov...@starpower.net 
Sent: Friday, June 5, 2020 2:03 AM 
To: Elecraft Reflector  
Subject: Re: [Elecraft] FIXED--was NOT the feedline 

This is an interesting video demonstrating the relative benefits of heat 
shrink and cold shrink tubing 


www.youtube.com/watch?v=wSOXfkB6Jgw 


73 
Frank 
W3LPL 

- Original Message - 

From: "Peter Dougherty"  
To: "Edward R Cole" , "Elecraft Reflector" 
 
Sent: Thursday, June 4, 2020 3:01:59 PM 
Subject: Re: [Elecraft] FIXED--was NOT the feedline 

Ed, this is the stuff I use on my outdoor connectors: 
https://tinyurl.com/y7uqqwsb 
Marine grade adhesive lined. 3/4" for plain ol' PL259 connections, and 1" 
for N connectors. 

And I mis-spoke (mis-typed??) earlier. Had a senior moment when I said 
Scotch 130 and Scotch 88 was my default. That HAD BEEN my default. My new 
default from about 3 or 4 years ago is Scotch 130 and this heat shrink if 
it's in the air, and just the marine grade heat shrink if it's at ground 
level. I find this combination to be unbeatable. 


- pjd 

-Original Message- 
From: elecraft-boun...@mailman.qth.net  On 

Behalf Of Edward R Cole 
Sent: Thursday, June 4, 2020 3:36 AM 
To: Elecraft Reflector  
Subject: Re: [Elecraft] FIXED--was NOT the feedline 

Some large coax connectors are supplied with heat shrink that has a melted 
inner "goo" which is very good sealant. I've found removal is not messy so 
apparently the "goo" cures in some manner. Pretty sure you can buy it at 
commercial electrical suppliers (but probably in 4-foot chunks which will 
cost you). I buy my ordinary heat shrink and tywraps (Thomas & Betts) from 
a local commercial electrical supply house. 

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Re: [Elecraft] K3 Spontaneous Failure

[Ted Roycraft]

Jim,

The K3 manual downloaded tonight, on page 69 says ...

==
ERR EE2
==
External EEPROM read/write test failed

EEPROM may be defective (front panel). However, this message may also 
appear if power is turned off/on too rapidly, or if the power supply 
voltage “bounces” during turn-on due to inadequate regulation. If the 
power supply is not at fault, try re-loading MCU firmware first; then 
try initializing parameters (pg. 66).



Hope this helps.

73, Ted, W2ZK

On 6/5/2020 22:20, Jim McCook wrote:
Tonight my K-3 failed after being on for about an hour when I was 
away.It displays ERR EE2.When powered on again the same ERR EE2 is 
displayed.Tapping any button on the radio brings up a different error 
message, such as DS1, FPF LOAD PENDING, BP1, LPF, IO3, IF1, and on and 
on.Firmware reload is not possible. I sent Elecraft a support message 
and will call Monday, assuming I will have to ship it for repair.Has 
anyone seen this type of failure?Jim W6YA

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Re: [Elecraft] Self-fusing liquid electrical tape

[W2xj]

try a 10 tower array. :-) 

Sent from my iPad

> On Jun 5, 2020, at 10:33 PM, Jim Brown  wrote:
> 
> I spent a summer during my college years silver-soldering 120 radials to 
> ground screens for each of the 4-tower array of WSAZ.
> 
> 73, Jim K9YC
> 
>> On 6/5/2020 2:41 PM, Roger Steyaert wrote:
>> that is why I high temperature silver soldered the wire and ground rods 
>> together. Not normal soft solder but the high strength, high temperature 
>> silver solder used in HVAC systems. This requires a acetylene torch to do 
>> the soldering with. this accomplishes the same thing that a CAD weld 
>> provides but with less cost if you have gas welding equipment available.
> 
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Re: [Elecraft] Self-fusing liquid electrical tape

[Jim Brown]

I spent a summer during my college years silver-soldering 120 radials to 
ground screens for each of the 4-tower array of WSAZ.


73, Jim K9YC

On 6/5/2020 2:41 PM, Roger Steyaert wrote:
that is why I high temperature silver soldered the wire and ground rods 
together. Not normal soft solder but the high strength, high temperature 
silver solder used in HVAC systems. This requires a acetylene torch to 
do the soldering with. this accomplishes the same thing that a CAD weld 
provides but with less cost if you have gas welding equipment available.


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Re: [Elecraft] Self-fusing liquid electrical tape

[Jim Brown]

Brain cramp -- I meant KF7P.

73, Jim K9YC

On 6/5/2020 4:06 PM, Dave Cole wrote:

Huh?  I don't sell them...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 6/5/20 10:53 AM, Jim Brown wrote:

On 6/5/2020 8:17 AM, Phil Kane wrote:

For our commercial and public safety
communication site grounding systems our firm insists on cad-weld at all
exposed and buried connection points but I would suspect that very few
hams, let alone residential or even commercial electricians, would go to
that length.


It was years before I went from mechanical clamps to cadwelds. No 
question that it's the way to go. Some are packaged much better than 
others. I prefer the ones where the two powders are packaged 
separately. NK7Z sells them.




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[Elecraft] K3 Spontaneous Failure

[Jim McCook]

Tonight my K-3 failed after being on for about an hour when I was 
away.It displays ERR EE2.When powered on again the same ERR EE2 is 
displayed.Tapping any button on the radio brings up a different error 
message, such as DS1, FPF LOAD PENDING, BP1, LPF, IO3, IF1, and on and 
on.Firmware reload is not possible. I sent Elecraft a support message 
and will call Monday, assuming I will have to ship it for repair.Has 
anyone seen this type of failure?Jim W6YA


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Re: [Elecraft] [KX3] LCD brightness setting

[rich hurd WC3T]

LCDs are “on” or “off.”   All they do is turn the substrate opaque.

The backlight heightens this contrast but you specifically aren’t asking
about the backlight.Possibly applying more voltage to the sense inputs
may make the contrast darker, but they may also smoke the display which
could ruin your day.  And there are no menu options other than backlight
toggle as far as I can see.

On Fri, Jun 5, 2020 at 19:32 Petr, OK1RP/M0SIS  wrote:

> Hi all,
>
> so sorry to bother with that over here.
> I did not found it in manual so I am trying to ask...
> Can someone let me guide how to change the LCD brightness on KX3 please?
> I do not means LCD backlight and I do not means LED brightness...
>
> Thanks, Petr
>
>
>
> -
> 73 - Petr, OK1RP
> "Apple & Elecraft freak"
> B:http://ok1rp.blogspot.com
> MeWe: https://bit.ly/2HGPoDx
> MeWe: https://bit.ly/2FmwvDt
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> __
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>
-- 
72,
Rich Hurd / WC3T / DMR: 3142737
Northampton County RACES, EPA-ARRL Public Information Officer for Scouting
Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid:
*FN20is*
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Re: [Elecraft] KX3/PX3/KXPA100 for sale

[richard gilley]

HI,  Due to the limited interest I have have decided not offer my  KX3 
equipment for sale at this time.

Sincerely 
R Gilley
AD1G  

> On Jun 4, 2020, at 19:49, richard gilley  wrote:
> 
> HI,
>   I have a KX3 and PX3 with a KXPA100 available as a complete set up.  
> Purchased September 2018.
> All interconnect cables, manuals, and two F.  Cady publications. I am a CW op 
> only, set up in shack only, never traveled.
> 
> For photos, details please contact me at "richgilley...@gmail.com 
> ."
> 
> I am asking $2500.00, includes shipping USPS, CONUS.  Bank check preferred.
> 
> Thank you for your attention.
> 
> R Gilley
> AD1G

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[Elecraft] [KX3] LCD brightness setting

[Petr, OK1RP/M0SIS]

Hi all,

so sorry to bother with that over here.
I did not found it in manual so I am trying to ask...
Can someone let me guide how to change the LCD brightness on KX3 please?
I do not means LCD backlight and I do not means LED brightness...

Thanks, Petr



-
73 - Petr, OK1RP 
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt
--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] Self-fusing liquid electrical tape

[Fred Jensen]

I'm colorblind.  If you're talking about the doobers at the end of each 
tie over the foot of the rail, they're hold downs for the rails on 
concrete ties.  They take the place of spikes in wood ties whose purpose 
is to maintain proper separation ["gauge"] between the rails.  The rails 
stand up by themselves.



On 6/5/2020 4:14 PM, Dave Cole wrote:

Anyone know what those green wires are on each RR cross tie?

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 6/5/20 12:28 PM, Edward T. Tanton wrote:

WOW!!! That was so-o-o neat!!!

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
donov...@starpower.net
Sent: Friday, June 05, 2020 2:14 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Self-fusing liquid electrical tape

Hey Jim,


If you think Cad-Welding a ground rod is fun to watch, take a look at
thermite welding of railroad tracks:


www.youtube.com/watch?v=5uxsFglz2ig


73
Frank
W3LPL

- Original Message -

From: "Jim Brown" 
To: elecraft@mailman.qth.net
Sent: Friday, June 5, 2020 6:07:22 PM
Subject: Re: [Elecraft] Self-fusing liquid electrical tape

On 6/5/2020 10:23 AM, Chris Waldrup wrote:
This is probably overkill for QRP but I wanted to do it right like 
we used

to do in broadcast.

The primary purpose of grounding bonding has NOTHING to do with radio --
it's for LIGHTNNG PROTECTION!


On 6/5/2020 10:46 AM, Walter Underwood wrote:

Cad-weld seems a easier than the other approach described. It is more

robust against corrosion, plus it is fun.

Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to
watch. :)

73, Jim K9YC
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Re: [Elecraft] Self-fusing liquid electrical tape

[Dave Cole]

Anyone know what those green wires are on each RR cross tie?

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 6/5/20 12:28 PM, Edward T. Tanton wrote:

WOW!!! That was so-o-o neat!!!

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
donov...@starpower.net
Sent: Friday, June 05, 2020 2:14 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Self-fusing liquid electrical tape

Hey Jim,


If you think Cad-Welding a ground rod is fun to watch, take a look at
thermite welding of railroad tracks:


www.youtube.com/watch?v=5uxsFglz2ig


73
Frank
W3LPL

- Original Message -

From: "Jim Brown" 
To: elecraft@mailman.qth.net
Sent: Friday, June 5, 2020 6:07:22 PM
Subject: Re: [Elecraft] Self-fusing liquid electrical tape

On 6/5/2020 10:23 AM, Chris Waldrup wrote:

This is probably overkill for QRP but I wanted to do it right like we used

to do in broadcast.

The primary purpose of grounding bonding has NOTHING to do with radio --
it's for LIGHTNNG PROTECTION!


On 6/5/2020 10:46 AM, Walter Underwood wrote:

Cad-weld seems a easier than the other approach described. It is more

robust against corrosion, plus it is fun.

Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to
watch. :)

73, Jim K9YC
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Re: [Elecraft] Self-fusing liquid electrical tape

[Dave Cole]

Huh?  I don't sell them...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 6/5/20 10:53 AM, Jim Brown wrote:

On 6/5/2020 8:17 AM, Phil Kane wrote:

For our commercial and public safety
communication site grounding systems our firm insists on cad-weld at all
exposed and buried connection points but I would suspect that very few
hams, let alone residential or even commercial electricians, would go to
that length.


It was years before I went from mechanical clamps to cadwelds. No 
question that it's the way to go. Some are packaged much better than 
others. I prefer the ones where the two powders are packaged separately. 
NK7Z sells them.


73, Jim K9YC
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Re: [Elecraft] KPA500 Dead

[Don Wilhelm]

Lyn,

On your KAT500, do contact support about it, and if they want you to 
send it in, do so.  Many techs are working from home, and while the time 
from receipt at Elecraft until it is shipped may be longer, the process 
still is working.
Who knows when this coronavirus thing will subside and things will get 
fully back to normal and full in-office staffing, but Elecraft is 
'limping along' to support customers.


73,
Don W3FPR

On 6/5/2020 5:39 PM, Lyn Norstad wrote:

Tom -

I had the same experience a few months back.  I talked with Elecraft Support, 
and they had me check a few things.  There was no obvious cause, except the 
power supply board was dead.

They asked me to send it in, which I did, and they replaced the board.  
Fortunately I got it back a couple days before the COVID shutdown hit, and it 
has been fine since.

As a precautionary move, they changed the power transformer back to the default setting.  
I had set it up one notch because our line voltage is low, and that was needed to get it 
"near" the optimal value.

I also have tuner (KAT500) issues, but will live with it, as I am reluctant to 
send anything anywhere at this time.

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Re: [Elecraft] This morning.

[Wayne Burdick]

Well, Dan, now you've gone and done it. I'm going to have to escape the lab to 
do a little /PM outing with the KX2. 

Also a bit jealous of your RV :)

Wayne
N6KR



> On Jun 5, 2020, at 2:22 PM, Dan Baker  wrote:
> 
> This mornings setup.
> 
> https://youtu.be/yvPY6I6Uk0Y
> 
> -- 
> Sent from my iPhone X
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Re: [Elecraft] Self-fusing liquid electrical tape

[Roger Steyaert]

A way for us no longer young people to drive ground rods is with a SDS 
construction hammer and a ground rod driving bit. that is what 
electricians use. I have a layer of shale about 2 feet deep where I live 
and it takes less that 10 minutes per 8 foot ground rod driven below the 
surface with this method. You can get the equipment to do this at most 
tool rental places if you don't have your own. The driver bit for the 
tool is less very inexpensive at stores such as Lowes.


Roger K7RXV

On 6/5/2020 4:50 PM, Don Wilhelm wrote:

Mike,

They are all 8 foot rods and were driven vertically with a fence post 
driver and then finished off with a sledge.
I was 20 years younger at that time, I could not do it today.  3 or 4 
rods in a day was all the shoulders could manage.

Yes, we hit some small rocks, but they will split is hammered on enough.
We did not encounter large rocks when digging the house foundation or 
the trenches for the ground source heat pump - so it is not too rocky 
where we are - fist sized at the largest.


73,
Don W3FPR

On 6/5/2020 4:20 PM, Mike Maloney wrote:
Don,   Are those all 8 ft ground rods driven vertical in ground 
without help from a rock drill?   Lots of rock in your area?

Mike AC5P




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Re: [Elecraft] Self-fusing liquid electrical tape

[Roger Steyaert]

I have 12 ground rods in the ring ground system around my house with the 
radios in one room inside. the ground rods are all tied to each other 
and the power ground. I agree the Cad welds can get expensive, that is 
why I high temperature silver soldered the wire and ground rods 
together. Not normal soft solder but the high strength, high temperature 
silver solder used in HVAC systems. This requires a acetylene torch to 
do the soldering with. this accomplishes the same thing that a CAD weld 
provides but with less cost if you have gas welding equipment available. 
What ever you do make sure the system will maintain very good 
connections over time or you are just giveng yourself a false sense of 
security that can be very costly both in money and safety over time.


Roger K7RXV

On 6/5/2020 4:20 PM, Mike Maloney wrote:

  Don,   Are those all 8 ft ground rods driven vertical in ground without help 
from a rock drill?   Lots of rock in your area?  Mike AC5P
 On Friday, June 5, 2020, 03:10:11 PM CDT, W2xj  wrote:
  
  To my mind, false economy.


Sent from my iPad


On Jun 5, 2020, at 3:36 PM, Don Wilhelm  wrote:


That is why I used the mechanical clamps.  I have 10 ground rods for a 
perimeter ground wire around the house, 6 on the perimeter ground around the 
workshop building (where the antenna feedlines first enter) and another 4 in 
the antenna field.  A total of 20 Cad Welds would have exceeded my budget - the 
#4 copper wire was expensive enough!
All the clamps are above ground a bit, so I can check the tightness with a 
wrench at least once a year.
In most cases, the perimeter wires are folded back on itself to fit into the 
clamp, so the wire is continuous rather than having cut ends.
Yes, even the utility ground rod clamp is exposed.  The building inspector 
frowned on it until I told him why and he allowed it because I do not (will 
not) mow grass near any of the ground rods.

73,
Don W3FPR


On 6/5/2020 2:55 PM, Bob McGraw K4TAX wrote:
Just look at $11.00 per ground rod connection for Cad-Weld as compared to  
$1.98 for a mechanical clamp.  Which do you think a ham will choose ?

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Re: [Elecraft] KPA500 Dead

[Lyn Norstad]

Tom -

I had the same experience a few months back.  I talked with Elecraft Support, 
and they had me check a few things.  There was no obvious cause, except the 
power supply board was dead.

They asked me to send it in, which I did, and they replaced the board.  
Fortunately I got it back a couple days before the COVID shutdown hit, and it 
has been fine since.

As a precautionary move, they changed the power transformer back to the default 
setting.  I had set it up one notch because our line voltage is low, and that 
was needed to get it "near" the optimal value.

I also have tuner (KAT500) issues, but will live with it, as I am reluctant to 
send anything anywhere at this time.

73
Lyn, W0LEN


-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Tom Berry
Sent: Friday, June 05, 2020 11:05 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500 Dead

I was operating on FT8  20 meters for quite a long time with my KPA500 
running about 400 watts and heard a few pops (like something arching).  
Heard it a few more times then the amp went off.

Now it will not power on.  No lights, nothing.  I checked the fuse and 
it is OK.

Can you tell me where to start looking?


Thanks

Tom AAA4VV

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[Elecraft] This morning.

[Dan Baker]

This mornings setup.

https://youtu.be/yvPY6I6Uk0Y

-- 
Sent from my iPhone X
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Re: [Elecraft] Self-fusing liquid electrical tape

[Phil Kane]

On 6/5/2020 12:01 PM, Bob McGraw K4TAX wrote:

> I agree with Jim, K9YC on this.  Grounding is for lightning
> protection.   To be effective, it should be outside of the
> structure/house and be very low resistance.   And all driven grounds
> must be bonded back to the AC Mains ground.  This is per NEC.  Your
> equipment, your house, and your life may depend on it being done correctly.

Another thing that we do is to bond all of the ground rods in an outside
ring which is buried in a trench filled with conductive concrete.  A
layer of the concrete, than the ground ring, and then another layer of
that concrete.  Expensive? You betcha, but cheap insurance for sites
costing well over a million dollars just for the infrastructure.

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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Re: [Elecraft] Self-fusing liquid electrical tape

[N2TK via Elecraft]

Now that was cool. Actually very hot 
N2TK, Tony

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of donov...@starpower.net
Sent: Friday, June 5, 2020 2:14 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Self-fusing liquid electrical tape

Hey Jim, 


If you think Cad-Welding a ground rod is fun to watch, take a look at thermite 
welding of railroad tracks: 


www.youtube.com/watch?v=5uxsFglz2ig 


73 
Frank 
W3LPL 

- Original Message -

From: "Jim Brown"  
To: elecraft@mailman.qth.net 
Sent: Friday, June 5, 2020 6:07:22 PM 
Subject: Re: [Elecraft] Self-fusing liquid electrical tape 

On 6/5/2020 10:23 AM, Chris Waldrup wrote: 
> This is probably overkill for QRP but I wanted to do it right like we used to 
> do in broadcast. 

The primary purpose of grounding bonding has NOTHING to do with radio -- 
it's for LIGHTNNG PROTECTION! 


On 6/5/2020 10:46 AM, Walter Underwood wrote: 
> Cad-weld seems a easier than the other approach described. It is more 
robust against corrosion, plus it is fun. 

Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to 
watch. :) 

73, Jim K9YC 
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Re: [Elecraft] Self-fusing liquid electrical tape

[Rick Bates, NK7I]

Or expense?  Lessee... 20 (ground rods including 5 at the tower) times 
$4 per clamp, vs $11-15 for little discernible gains.. adding over $300 
in my grounding solution.  Not a huge amount, but those costs add up 
quickly.  I went with clamps, all buried below grade.


I opted to tie the shop (barn) panel rod to the tower and the house 
panel rod and have a single run out into a field for future (RX antenna) 
use (and simply more earth contact to dissipate).


The copper wire was the cheapest element in play.

Rick NK7I


On 6/5/2020 10:32 AM, Phil Kane wrote:

On 6/5/2020 9:05 AM, Grant Youngman wrote:


Cad-weld isn’t expensive — $11-15 per weld depending on where you buy
the stuff.  Typically sold in kits of 6 one-shot crucibles, and
available for varying ground wire sizes on 1/2” or 5/8” ground rods.

Agreed, but how many of us would go through that exercise?

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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Re: [Elecraft] Self-fusing liquid electrical tape

[Don Wilhelm]

Mike,

They are all 8 foot rods and were driven vertically with a fence post 
driver and then finished off with a sledge.
I was 20 years younger at that time, I could not do it today.  3 or 4 
rods in a day was all the shoulders could manage.

Yes, we hit some small rocks, but they will split is hammered on enough.
We did not encounter large rocks when digging the house foundation or 
the trenches for the ground source heat pump - so it is not too rocky 
where we are - fist sized at the largest.


73,
Don W3FPR

On 6/5/2020 4:20 PM, Mike Maloney wrote:
Don,   Are those all 8 ft ground rods driven vertical in ground 
without help from a rock drill?   Lots of rock in your area?

Mike AC5P




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Re: [Elecraft] Self-fusing liquid electrical tape

[N2TK via Elecraft]

All my ground rods are below ground level. I didn't want to take a chance of 
failure so used 23 one-shots with #4 solid copper wire.  Maybe that is one of 
the reasons why I get away with never unhooking coax even when I watch 
lightning strike the tower. One point ground for everything, lightning 
arrestors on every coax and control line to the house, bonding the shield of 
all coax to the base of the tower probably helps too.
73,
N2TK, Tony

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Art Greenberg
Sent: Friday, June 5, 2020 1:41 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Self-fusing liquid electrical tape

Yeah, maybe I'm one of the exceptions. I just used 20 of them to build a 
lightning ground system for a new tower install. Easy to use and considerable 
peace of mind knowing the joints created will last a long time underground.

--
Art Greenberg
WA2LLN
a...@artg.tv

On Fri, Jun 5, 2020, at 13:32, Phil Kane wrote:
> On 6/5/2020 9:05 AM, Grant Youngman wrote:
> 
> > Cad-weld isn’t expensive — $11-15 per weld depending on where you 
> > buy the stuff.  Typically sold in kits of 6 one-shot crucibles, and 
> > available for varying ground wire sizes on 1/2” or 5/8” ground rods.
> 
> Agreed, but how many of us would go through that exercise?
> 
> 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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Re: [Elecraft] Self-fusing liquid electrical tape

[Byron Servies]

It sure is!  This was my first one, so I didn't really know what to
expect. I was a bit more casual with the rest, I admit:

https://youtu.be/j3MwokpxSco

On Fri, Jun 5, 2020 at 10:48 AM Walter Underwood  wrote:
>
> Cad-weld seems a easier than the other approach described. It is more robust 
> against corrosion, plus it is fun.

73, Byron N6NUL
-- 
- Northern California Contest Club
- CU in the Cal QSO Party 3-4 Oct 2020
- www.cqp.org
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Re: [Elecraft] Self-fusing liquid electrical tape

[Mike Maloney]

 Don,   Are those all 8 ft ground rods driven vertical in ground without help 
from a rock drill?   Lots of rock in your area?  Mike AC5P
On Friday, June 5, 2020, 03:10:11 PM CDT, W2xj  wrote:  
 
 To my mind, false economy. 

Sent from my iPad

> On Jun 5, 2020, at 3:36 PM, Don Wilhelm  wrote:
> 
> 
> That is why I used the mechanical clamps.  I have 10 ground rods for a 
> perimeter ground wire around the house, 6 on the perimeter ground around the 
> workshop building (where the antenna feedlines first enter) and another 4 in 
> the antenna field.  A total of 20 Cad Welds would have exceeded my budget - 
> the #4 copper wire was expensive enough!
> All the clamps are above ground a bit, so I can check the tightness with a 
> wrench at least once a year.
> In most cases, the perimeter wires are folded back on itself to fit into the 
> clamp, so the wire is continuous rather than having cut ends.
> Yes, even the utility ground rod clamp is exposed.  The building inspector 
> frowned on it until I told him why and he allowed it because I do not (will 
> not) mow grass near any of the ground rods.
> 
> 73,
> Don W3FPR
> 
>> On 6/5/2020 2:55 PM, Bob McGraw K4TAX wrote:
>> Just look at $11.00 per ground rod connection for Cad-Weld as compared to  
>> $1.98 for a mechanical clamp.  Which do you think a ham will choose ?
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Re: [Elecraft] Self-fusing liquid electrical tape

[W2xj]

To my mind, false economy. 

Sent from my iPad

> On Jun 5, 2020, at 3:36 PM, Don Wilhelm  wrote:
> 
> 
> That is why I used the mechanical clamps.  I have 10 ground rods for a 
> perimeter ground wire around the house, 6 on the perimeter ground around the 
> workshop building (where the antenna feedlines first enter) and another 4 in 
> the antenna field.  A total of 20 Cad Welds would have exceeded my budget - 
> the #4 copper wire was expensive enough!
> All the clamps are above ground a bit, so I can check the tightness with a 
> wrench at least once a year.
> In most cases, the perimeter wires are folded back on itself to fit into the 
> clamp, so the wire is continuous rather than having cut ends.
> Yes, even the utility ground rod clamp is exposed.  The building inspector 
> frowned on it until I told him why and he allowed it because I do not (will 
> not) mow grass near any of the ground rods.
> 
> 73,
> Don W3FPR
> 
>> On 6/5/2020 2:55 PM, Bob McGraw K4TAX wrote:
>> Just look at $11.00 per ground rod connection for Cad-Weld as compared to  
>> $1.98 for a mechanical clamp.   Which do you think a ham will choose ?
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Re: [Elecraft] Self-fusing liquid electrical tape

[Bill Steffey NY9H]

1 TOWER   6000-20 k      1HOLE  WITH CONCRETE $1000

HUNDREDS OF FEET OF LMR 600   ,  RG213   ETC

4 ANTENNAS    $1600

ROTOR  1600

cadwelds for the 9 10 BURIED ground rodsat the tower   and few more 
at the house MUST be in the budget.


why stray from a great job for a few hundred bucks.   CADWELD.

On 6/5/2020 2:55 PM, Bob McGraw K4TAX wrote:
Just look at $11.00 per ground rod connection for Cad-Weld as compared 
to  $1.98 for a mechanical clamp.   Which do you think a ham will 
choose ?
ered to n...@arrl.net 


--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

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Re: [Elecraft] K3 with 2m internal transverter

[Bob McGraw K4TAX]

While I use an external transverter with my K3S, I do not suggest using 
the K3 internal preamp.  The transverter has adequate gain and also a 
good low noise front end.


73

Bob, K4TAX


On 6/5/2020 2:03 PM, Jim Miller wrote:

Helping a friend to try to get the most out of his 2m equipped K3
especially for EME.

Is it recommended to use the internal preamp when the internal
transverter is in use? I'm guessing "no" due to to 20db transverter RX
gain.

On page 21 of the P3 Owners Manual it describes the integration of the
K3/P3 wrt attenuator and preamp settings. Does the K3 and P3 similarly
communicate the additional 20db gain of the transverter and reflect
that in a downward push of the P3 noise display?

Thanks

Jim ab3cv
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Re: [Elecraft] Self-fusing liquid electrical tape

[Don Wilhelm]

That is why I used the mechanical clamps.  I have 10 ground rods for a 
perimeter ground wire around the house, 6 on the perimeter ground around 
the workshop building (where the antenna feedlines first enter) and 
another 4 in the antenna field.  A total of 20 Cad Welds would have 
exceeded my budget - the #4 copper wire was expensive enough!
All the clamps are above ground a bit, so I can check the tightness with 
a wrench at least once a year.
In most cases, the perimeter wires are folded back on itself to fit into 
the clamp, so the wire is continuous rather than having cut ends.
Yes, even the utility ground rod clamp is exposed.  The building 
inspector frowned on it until I told him why and he allowed it because I 
do not (will not) mow grass near any of the ground rods.


73,
Don W3FPR

On 6/5/2020 2:55 PM, Bob McGraw K4TAX wrote:
Just look at $11.00 per ground rod connection for Cad-Weld as compared 
to  $1.98 for a mechanical clamp.   Which do you think a ham will choose ?



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Re: [Elecraft] Self-fusing liquid electrical tape

[Edward T. Tanton]

WOW!!! That was so-o-o neat!!!

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
donov...@starpower.net
Sent: Friday, June 05, 2020 2:14 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Self-fusing liquid electrical tape

Hey Jim, 


If you think Cad-Welding a ground rod is fun to watch, take a look at 
thermite welding of railroad tracks: 


www.youtube.com/watch?v=5uxsFglz2ig 


73 
Frank 
W3LPL 

- Original Message -

From: "Jim Brown"  
To: elecraft@mailman.qth.net 
Sent: Friday, June 5, 2020 6:07:22 PM 
Subject: Re: [Elecraft] Self-fusing liquid electrical tape 

On 6/5/2020 10:23 AM, Chris Waldrup wrote: 
> This is probably overkill for QRP but I wanted to do it right like we used
to do in broadcast. 

The primary purpose of grounding bonding has NOTHING to do with radio -- 
it's for LIGHTNNG PROTECTION! 


On 6/5/2020 10:46 AM, Walter Underwood wrote: 
> Cad-weld seems a easier than the other approach described. It is more 
robust against corrosion, plus it is fun. 

Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to 
watch. :) 

73, Jim K9YC 
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Re: [Elecraft] KPA500 Dead

[Jack Brindle via Elecraft]

Actually four. There are two on the power supply board that protect the low 
voltage supply. Since the front panel appears not to be powering up, it is 
possible that one or both of these may be blown.

I don’t really have any suggestions for what might be wrong, so the best thing 
to do is to contact customer support. They are still rather busy, so it might 
take a little while for them to get back to you, but I am sure they will be 
able to help.

Good luck, and hope we can help you get your KPA500 back up and running quickly!

73,
Jack, W6FB

> On Jun 5, 2020, at 11:41 AM, Bob McGraw K4TAX  wrote:
> 
> You say you checked the "fuse" and it is OK.   In fact, there are two fuses.  
> If either has failed the amp won't power on.   Then check the voltage at the 
> outlet from where the amp is powered.
> 
> If you don't know where to start looking,.if the above two items are 
> OK, then I suggest sending an e-mail to tech support at Elecraft and ask for 
> a RA.  Chances are the issue is beyond local repair, either by knowledge or 
> test equipment and parts.
> 
> 73
> 
> Bob, K4TAX
> 
> 
> On 6/5/2020 11:04 AM, Tom Berry wrote:
>> I was operating on FT8  20 meters for quite a long time with my KPA500 
>> running about 400 watts and heard a few pops (like something arching).  
>> Heard it a few more times then the amp went off.
>> 
>> Now it will not power on.  No lights, nothing.  I checked the fuse and it is 
>> OK.
>> 
>> Can you tell me where to start looking?
>> 
>> 
>> Thanks
>> 
>> Tom AAA4VV
>> 
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[Elecraft] K3 with 2m internal transverter

[Jim Miller]

Helping a friend to try to get the most out of his 2m equipped K3
especially for EME.

Is it recommended to use the internal preamp when the internal
transverter is in use? I'm guessing "no" due to to 20db transverter RX
gain.

On page 21 of the P3 Owners Manual it describes the integration of the
K3/P3 wrt attenuator and preamp settings. Does the K3 and P3 similarly
communicate the additional 20db gain of the transverter and reflect
that in a downward push of the P3 noise display?

Thanks

Jim ab3cv
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Re: [Elecraft] Self-fusing liquid electrical tape

[Bob McGraw K4TAX]

I agree with Jim, K9YC on this.  Grounding is for lightning 
protection.   To be effective, it should be outside of the 
structure/house and be very low resistance.   And all driven grounds 
must be bonded back to the AC Mains ground.  This is per NEC.  Your 
equipment, your house, and your life may depend on it being done correctly.


Yes, the Cad-Weld fireworks are indeed impressive.   And when finished 
one has a connection that will survive reliably underground for years 
and years.   Where as a mechanical connection is only good for a few 
years and less if buried. Something about dissimilar metal chemical 
reaction.


73

Bob, K4TAX


On 6/5/2020 1:07 PM, Jim Brown wrote:

On 6/5/2020 10:23 AM, Chris Waldrup wrote:
This is probably overkill for QRP but I wanted to do it right like we 
used to do in broadcast.


The primary purpose of grounding bonding has NOTHING to do with radio 
-- it's for LIGHTNNG PROTECTION!



On 6/5/2020 10:46 AM, Walter Underwood wrote:
> Cad-weld seems a easier than the other approach described. It is 
more robust against corrosion, plus it is fun.


Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to 
watch. :)


73, Jim K9YC
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Re: [Elecraft] KPA500 Dead

[Tom Berry]

On 6/5/2020 2:41 PM, Bob McGraw K4TAX wrote:
You say you checked the "fuse" and it is OK.   In fact, there are two 
fuses.  If either has failed the amp won't power on.   Then check the 
voltage at the outlet from where the amp is powered.


If you don't know where to start looking,.if the above two 
items are OK, then I suggest sending an e-mail to tech support at 
Elecraft and ask for a RA.  Chances are the issue is beyond local 
repair, either by knowledge or test equipment and parts.


73

Bob, K4TAX


Thanks Bob,

I am sure you are correct.   Just hate to send it off since I use it 
about every day.  I am retired and if I don't have any wife jobs then 
I'm on the radio.


I have seen you give many good answers here.

Thanks

73 Tom AA4VV

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Re: [Elecraft] Self-fusing liquid electrical tape

[Fred Jensen]

In the mid-60's, on the other side of the planet, we ran missions 
putting a transportable TACAN on the air for as long as the JP-4 for the 
400 Hz turbine alternators lasted [~10-15 days].  Then, we piled all the 
gear on top, several thermite packs on that, and pulled the tapes.  It 
reduced EVERYTHING to molten slag ... sadly including two brand new 
KWM-2A's each time. [:=


73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 6/5/2020 11:13 AM, donov...@starpower.net wrote:

Hey Jim,


If you think Cad-Welding a ground rod is fun to watch, take a look at
thermite welding of railroad tracks:


www.youtube.com/watch?v=5uxsFglz2ig


73
Frank
W3LPL




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Re: [Elecraft] Self-fusing liquid electrical tape

[Bob McGraw K4TAX]

Just look at $11.00 per ground rod connection for Cad-Weld as compared 
to  $1.98 for a mechanical clamp.   Which do you think a ham will choose ?


73

Bob, K4TAX

On 6/5/2020 12:46 PM, Walter Underwood wrote:

Cad-weld seems a easier than the other approach described. It is more robust 
against corrosion, plus it is fun.

I just don’t see a downside. :-)

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)


On Jun 5, 2020, at 10:32 AM, Phil Kane  wrote:

On 6/5/2020 9:05 AM, Grant Youngman wrote:


Cad-weld isn’t expensive — $11-15 per weld depending on where you buy
the stuff.  Typically sold in kits of 6 one-shot crucibles, and
available for varying ground wire sizes on 1/2” or 5/8” ground rods.

Agreed, but how many of us would go through that exercise?

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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Re: [Elecraft] KPA500 Dead

[Tom Berry]

On 6/5/2020 2:10 PM, Alan - G4GNX wrote:
Yes, we're supposed to have some technical background, but by asking 
"where do I start" tends to indicate that there might just be an 
insufficiency of necessary knowledge. I would hate to see someone die, 
because I had failed to speak out. :-)


I also built several Elecraft products, including a couple of KPA500s, 
and the manual clearly indicates screwing the lid down, before 
powering up. There's a good reason for that.


My apologies to the OP. I have no wish to offend you.

73,

Alan. G4GNX



Hi Alan,

You have not offended me.   I have taken the top off and looked around.  
I certainly don't see anything that looks like it has been arching.


The AC power is ok.  The fuses are ok.   Just thought someone would have 
an idea on where to start looking.


I have emailed Elecraft but so far no answer.  Sent the email on 6/3/2020.

Thanks

73 Tom AA4VV

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Re: [Elecraft] Self-fusing liquid electrical tape

[Bob McGraw K4TAX]

Anyone that would desire to have a proper and reliable installation for 
connecting a conductor to a ground rod.    Me for one!


To that end, I've visited many ham stations where it seems there is a 
mish mash of equipment connected in a hap hazard manner.    I view this 
is far from good engineering practice and methods.  And then they often 
wonder why things don't work or don't work reliably.


73

Bob, K4TAX



On 6/5/2020 12:32 PM, Phil Kane wrote:

On 6/5/2020 9:05 AM, Grant Youngman wrote:


Cad-weld isn’t expensive — $11-15 per weld depending on where you buy
the stuff.  Typically sold in kits of 6 one-shot crucibles, and
available for varying ground wire sizes on 1/2” or 5/8” ground rods.

Agreed, but how many of us would go through that exercise?

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



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Re: [Elecraft] KPA500 Dead

[Tom Berry]

On 6/5/2020 2:02 PM, Jim Brown wrote:

On 6/5/2020 9:33 AM, Alan - G4GNX wrote:
Unless you really know what you're doing, then you should not remove 
the lid. Fault finding could easily result in the need to power up 
and expose yourself to many hidden dangers.


Ummm -- we're hams, and are supposed to have at least some technical 
background. If we can't open up a product like one of the Elecraft 
rigs and at least look around we ought to send our boxtop license back 
to the government agency that issued it. That doesn't mean that we 
should attempt circuit board level troubleshooting.


Elecraft sells most of their products as kits that require minimal 
assembly of pre-tested circuit boards and other components. I built 
two K3s, a KX3, two P3s with SVGA boards, and a KPA500. The KPA1500 is 
not available as a kit.


73, Jim K9YC 



Jim,  I didn't say I couldn't look around and I'm certainly not going to 
send my "BOXTOP" license back.  I have had it since 1955.  Took all the 
CW tests in front of an examiner etc.


I want to congratulate you on building all the Elecraft stuff.  I have 
built an AT-1, the 30 watt Heathkit transmitter, DX100, HW101, and 
various test equipment.


Tom AA4VV ex W8VSV.

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Re: [Elecraft] KPA500 Dead

[Bob McGraw K4TAX]

You say you checked the "fuse" and it is OK.   In fact, there are two 
fuses.  If either has failed the amp won't power on.   Then check the 
voltage at the outlet from where the amp is powered.


If you don't know where to start looking,.if the above two items 
are OK, then I suggest sending an e-mail to tech support at Elecraft and 
ask for a RA.  Chances are the issue is beyond local repair, either by 
knowledge or test equipment and parts.


73

Bob, K4TAX


On 6/5/2020 11:04 AM, Tom Berry wrote:
I was operating on FT8  20 meters for quite a long time with my KPA500 
running about 400 watts and heard a few pops (like something 
arching).  Heard it a few more times then the amp went off.


Now it will not power on.  No lights, nothing.  I checked the fuse and 
it is OK.


Can you tell me where to start looking?


Thanks

Tom AAA4VV

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Re: [Elecraft] Self-fusing liquid electrical tape

[Jim Brown]

Neat!

Jim

On 6/5/2020 11:13 AM, donov...@starpower.net wrote:

Hey Jim,


If you think Cad-Welding a ground rod is fun to watch, take a look at
thermite welding of railroad tracks:


www.youtube.com/watch?v=5uxsFglz2ig


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Re: [Elecraft] Self-fusing liquid electrical tape

[Chris Waldrup]

Right sir I understand. I just mean I don't have large towers and big antennas. 
Just want be protected since we are up high. 

Chris 

> On Jun 5, 2020, at 1:09 PM, Jim Brown  wrote:
> 
> On 6/5/2020 10:23 AM, Chris Waldrup wrote:
>> This is probably overkill for QRP but I wanted to do it right like we used 
>> to do in broadcast.
> 
> The primary purpose of grounding bonding has NOTHING to do with radio -- it's 
> for LIGHTNNG PROTECTION!
> 
> 
> On 6/5/2020 10:46 AM, Walter Underwood wrote:
> > Cad-weld seems a easier than the other approach described. It is more 
> > robust against corrosion, plus it is fun.
> 
> Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to watch. 
> :)
> 
> 73, Jim K9YC
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Re: [Elecraft] Self-fusing liquid electrical tape

[donovanf]

Hey Jim, 


If you think Cad-Welding a ground rod is fun to watch, take a look at 
thermite welding of railroad tracks: 


www.youtube.com/watch?v=5uxsFglz2ig 


73 
Frank 
W3LPL 

- Original Message -

From: "Jim Brown"  
To: elecraft@mailman.qth.net 
Sent: Friday, June 5, 2020 6:07:22 PM 
Subject: Re: [Elecraft] Self-fusing liquid electrical tape 

On 6/5/2020 10:23 AM, Chris Waldrup wrote: 
> This is probably overkill for QRP but I wanted to do it right like we used to 
> do in broadcast. 

The primary purpose of grounding bonding has NOTHING to do with radio -- 
it's for LIGHTNNG PROTECTION! 


On 6/5/2020 10:46 AM, Walter Underwood wrote: 
> Cad-weld seems a easier than the other approach described. It is more 
robust against corrosion, plus it is fun. 

Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to 
watch. :) 

73, Jim K9YC 
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Re: [Elecraft] KPA500 Dead

[Alan - G4GNX]

Yes, we're supposed to have some technical background, but by asking 
"where do I start" tends to indicate that there might just be an 
insufficiency of necessary knowledge. I would hate to see someone die, 
because I had failed to speak out. :-)


I also built several Elecraft products, including a couple of KPA500s, 
and the manual clearly indicates screwing the lid down, before powering 
up. There's a good reason for that.


My apologies to the OP. I have no wish to offend you.

73,

Alan. G4GNX


-- Original Message --
From: "Jim Brown" 
To: elecraft@mailman.qth.net
Sent: 05/06/2020 19:02:23
Subject: Re: [Elecraft] KPA500 Dead


On 6/5/2020 9:33 AM, Alan - G4GNX wrote:

Unless you really know what you're doing, then you should not remove the lid. 
Fault finding could easily result in the need to power up and expose yourself 
to many hidden dangers.


Ummm -- we're hams, and are supposed to have at least some technical 
background. If we can't open up a product like one of the Elecraft rigs and at 
least look around we ought to send our boxtop license back to the government 
agency that issued it. That doesn't mean that we should attempt circuit board 
level troubleshooting.

Elecraft sells most of their products as kits that require minimal assembly of 
pre-tested circuit boards and other components. I built two K3s, a KX3, two P3s 
with SVGA boards, and a KPA500. The KPA1500 is not available as a kit.

73, Jim K9YC



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Re: [Elecraft] Self-fusing liquid electrical tape

[Jim Brown]

On 6/5/2020 10:23 AM, Chris Waldrup wrote:

This is probably overkill for QRP but I wanted to do it right like we used to 
do in broadcast.


The primary purpose of grounding bonding has NOTHING to do with radio -- 
it's for LIGHTNNG PROTECTION!



On 6/5/2020 10:46 AM, Walter Underwood wrote:
> Cad-weld seems a easier than the other approach described. It is more 
robust against corrosion, plus it is fun.


Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to 
watch. :)


73, Jim K9YC
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Re: [Elecraft] KPA500 Dead

[Jim Brown]

On 6/5/2020 9:33 AM, Alan - G4GNX wrote:
Unless you really know what you're doing, then you should not remove the 
lid. Fault finding could easily result in the need to power up and 
expose yourself to many hidden dangers.


Ummm -- we're hams, and are supposed to have at least some technical 
background. If we can't open up a product like one of the Elecraft rigs 
and at least look around we ought to send our boxtop license back to the 
government agency that issued it. That doesn't mean that we should 
attempt circuit board level troubleshooting.


Elecraft sells most of their products as kits that require minimal 
assembly of pre-tested circuit boards and other components. I built two 
K3s, a KX3, two P3s with SVGA boards, and a KPA500. The KPA1500 is not 
available as a kit.


73, Jim K9YC
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Re: [Elecraft] Self-fusing liquid electrical tape

[Jim Brown]

On 6/5/2020 8:17 AM, Phil Kane wrote:

For our commercial and public safety
communication site grounding systems our firm insists on cad-weld at all
exposed and buried connection points but I would suspect that very few
hams, let alone residential or even commercial electricians, would go to
that length.


It was years before I went from mechanical clamps to cadwelds. No 
question that it's the way to go. Some are packaged much better than 
others. I prefer the ones where the two powders are packaged separately. 
NK7Z sells them.


73, Jim K9YC
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Re: [Elecraft] Self-fusing liquid electrical tape

[Walter Underwood]

Cad-weld seems a easier than the other approach described. It is more robust 
against corrosion, plus it is fun.

I just don’t see a downside. :-)

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Jun 5, 2020, at 10:32 AM, Phil Kane  wrote:
> 
> On 6/5/2020 9:05 AM, Grant Youngman wrote:
> 
>> Cad-weld isn’t expensive — $11-15 per weld depending on where you buy
>> the stuff.  Typically sold in kits of 6 one-shot crucibles, and
>> available for varying ground wire sizes on 1/2” or 5/8” ground rods.
> 
> Agreed, but how many of us would go through that exercise?
> 
> 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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Re: [Elecraft] KPA500 Dead

[Don Wilhelm]

Tom,

The best place to start is with your AC Power.  If that is OK, the next 
step is to email supp...@elecraft.com.


73,
Don W3FPR

On 6/5/2020 12:04 PM, Tom Berry wrote:
I was operating on FT8  20 meters for quite a long time with my KPA500 
running about 400 watts and heard a few pops (like something arching). 
Heard it a few more times then the amp went off.


Now it will not power on.  No lights, nothing.  I checked the fuse and 
it is OK.


Can you tell me where to start looking?

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Re: [Elecraft] Self-fusing liquid electrical tape

[Art Greenberg]

Yeah, maybe I'm one of the exceptions. I just used 20 of them to build a 
lightning ground system for a new tower install. Easy to use and considerable 
peace of mind knowing the joints created will last a long time underground.

-- 
Art Greenberg
WA2LLN
a...@artg.tv

On Fri, Jun 5, 2020, at 13:32, Phil Kane wrote:
> On 6/5/2020 9:05 AM, Grant Youngman wrote:
> 
> > Cad-weld isn’t expensive — $11-15 per weld depending on where you buy
> > the stuff.  Typically sold in kits of 6 one-shot crucibles, and
> > available for varying ground wire sizes on 1/2” or 5/8” ground rods.
> 
> Agreed, but how many of us would go through that exercise?
> 
> 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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Re: [Elecraft] KPA500 Dead

[hawley, charles j jr]

There’re a couple things in series with the transformer primaries that look 
like thermistors. Wonder about them. They’re labeled T and SL 1, and SL 2.

Chuck Jack Hawley 
KE9UW

Sent from my iPhone, cjack 

> On Jun 5, 2020, at 12:08 PM, Nr4c  wrote:
> 
> Fuses!
> 
> 400 Watts “for quite a long time”?  Bet the fans were happy. 
> 
> Sent from my iPhone
> ...nr4c. bill
> 
> 
>> On Jun 5, 2020, at 12:07 PM, Tom Berry  wrote:
>> 
>> I was operating on FT8  20 meters for quite a long time with my KPA500 
>> running about 400 watts and heard a few pops (like something arching).  
>> Heard it a few more times then the amp went off.
>> 
>> Now it will not power on.  No lights, nothing.  I checked the fuse and it is 
>> OK.
>> 
>> Can you tell me where to start looking?
>> 
>> 
>> Thanks
>> 
>> Tom AAA4VV
>> 
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Re: [Elecraft] Self-fusing liquid electrical tape

[Phil Kane]

On 6/5/2020 9:05 AM, Grant Youngman wrote:

> Cad-weld isn’t expensive — $11-15 per weld depending on where you buy
> the stuff.  Typically sold in kits of 6 one-shot crucibles, and
> available for varying ground wire sizes on 1/2” or 5/8” ground rods.

Agreed, but how many of us would go through that exercise?

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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Re: [Elecraft] Self-fusing liquid electrical tape

[Chris Waldrup]

I meant to add I couldn't get the shots to fire with the sparking tool I 
purchased so I ran down to a fireworks store and purchased a box of sparklers. 
They do a ***fantastic*** job at ignition. 
Then when you're done after things cool a few gentle taps with a hammer breaks 
off the thin ceramic form and you're good to go. 

Chris
KD4PBJ

> On Jun 5, 2020, at 12:23 PM, Chris Waldrup  wrote:
> 
> Hi Phil,
> 
> I use Erico One Shot cad welds on my workshop grounding system. Everything is 
> tied together with cad welded bare 6 AWG and I have 8 foot ground rods, 
> although I had to drive them in at an angle. Our house is on top of a 
> mountain in TN and soil depth varies from probably 6 ft deep to exposed rock 
> in certain parts of the property. This is probably overkill for QRP but I 
> wanted to do it right like we used to do in broadcast. 
> 
> Chris
> KD4PBJ
> 
>>> On Jun 5, 2020, at 10:19 AM, Phil Kane  wrote:
>>> 
>>> On 6/4/2020 8:50 PM, Ed Tanton wrote:
>>> 
>>> I should have mentioned that. I strip 5 or 6 inches of insulation. That
>>> was why I cleaned the top of the ground rod and sprayed it with
>>> electrical lubricant. I used a stainless steel hose clamp to hold the
>>> stripped wires against the ground rod at each end of the stripped wire
>>> portions. The next part is what I wrote about to start with.
>> 
>> Thank you for explaining that.  For our commercial and public safety
>> communication site grounding systems our firm insists on cad-weld at all
>> exposed and buried connection points but I would suspect that very few
>> hams, let alone residential or even commercial electricians, would go to
>> that length.  My mentor in that area, the late Tom Croda, who during his
>> lifetime was the national expert in comm site power and grounding, would
>> not settle for anything less.
>> 
>> 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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Re: [Elecraft] FIXED--was NOT the feedline

[Peter Dougherty]

Ouch! I'll get a few of these but reserve them for anything in the air that's 
difficult to access. I still have about 5 feet of the Ancor marine heat shrink 
for anything at ground level. 

 - pjd

-Original Message-
From: Grant Youngman  

DigiKey has it in 6” or 8” pieces of various diameters.  It runs around $25.00 
per piece, with quantity discounts.  Not inexpensive … 


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Re: [Elecraft] Self-fusing liquid electrical tape

[Chris Waldrup]

Hi Phil,

I use Erico One Shot cad welds on my workshop grounding system. Everything is 
tied together with cad welded bare 6 AWG and I have 8 foot ground rods, 
although I had to drive them in at an angle. Our house is on top of a mountain 
in TN and soil depth varies from probably 6 ft deep to exposed rock in certain 
parts of the property. This is probably overkill for QRP but I wanted to do it 
right like we used to do in broadcast. 

Chris
KD4PBJ

> On Jun 5, 2020, at 10:19 AM, Phil Kane  wrote:
> 
> On 6/4/2020 8:50 PM, Ed Tanton wrote:
> 
>> I should have mentioned that. I strip 5 or 6 inches of insulation. That
>> was why I cleaned the top of the ground rod and sprayed it with
>> electrical lubricant. I used a stainless steel hose clamp to hold the
>> stripped wires against the ground rod at each end of the stripped wire
>> portions. The next part is what I wrote about to start with.
> 
> Thank you for explaining that.  For our commercial and public safety
> communication site grounding systems our firm insists on cad-weld at all
> exposed and buried connection points but I would suspect that very few
> hams, let alone residential or even commercial electricians, would go to
> that length.  My mentor in that area, the late Tom Croda, who during his
> lifetime was the national expert in comm site power and grounding, would
> not settle for anything less.
> 
> 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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Re: [Elecraft] KPA500 Dead

[Nr4c]

Fuses!

400 Watts “for quite a long time”?  Bet the fans were happy. 

Sent from my iPhone
...nr4c. bill


> On Jun 5, 2020, at 12:07 PM, Tom Berry  wrote:
> 
> I was operating on FT8  20 meters for quite a long time with my KPA500 
> running about 400 watts and heard a few pops (like something arching).  Heard 
> it a few more times then the amp went off.
> 
> Now it will not power on.  No lights, nothing.  I checked the fuse and it is 
> OK.
> 
> Can you tell me where to start looking?
> 
> 
> Thanks
> 
> Tom AAA4VV
> 
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Re: [Elecraft] Cold Shrink Tubing (was Re: FIXED)

[donovanf]

Hi Lynn, 


I have no buried cable splices in my ham station. The only splices 
I once had failed years ago: 


- The buried AC power feed from the street was fabricated from two 
spliced cables. The neutral wire splice failed causing a near-catastrophe 
in my home 


- the buried 240 volt AC power feed to a shed 200 meters from my 
home is fed by two spliced cables. One of the splices failed, now 
I have only 120 volts in the shed... 


Now if I need to splice a buried cable I bring it to the surface and splice 
it above ground where it can be repaired. 


Cold shrink tubing is widely available on eBay, usually about ten dollars each 


73 
Frank 
W3LPL 





- Original Message -

From: "Lyn Norstad"  
To: donov...@starpower.net, "Elecraft Reflector"  
Sent: Friday, June 5, 2020 12:03:15 PM 
Subject: Cold Shrink Tubing (was Re: FIXED) 

Great video, Frank. Thanks for sharing. I had no idea cold shrink could 
potentially perform that well. 

Is that what you're using on buried cables? 

73 
Lyn, W0LEN 


> -Original Message- 
> From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of 
donov...@starpower.net 
> Sent: Friday, June 05, 2020 1:03 AM 
> To: Elecraft Reflector 
> Subject: Re: [Elecraft] FIXED--was NOT the feedline 
> 
> This is an interesting video demonstrating the relative benefits of 
> heat shrink and cold shrink tubing 
> 
> 
> www.youtube.com/watch?v=wSOXfkB6Jgw 
> 
> 
> 73 
> Frank 
> W3LPL 


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[Elecraft] [K2] K2 frozen on startup

[P H via Elecraft]

 

Recently I'vetried to add K6XX Cw Indicator and W3FPR Fixed Audio Output to my 
K2 (# above 4000).

 Something went wrong when I was soldering wiresto Control Board and Front 
Panel Board and the result is following:

- radio freezes at startup,

- when R5 (RIT) pot is fully CW display stops with "ELE",

- with R5 pot fullyCCW display reaches  "ELECRAFT"  and I may or may not hear 
receiver noise(depending on the position of pots R1 (Keyer Speed) and R2 (Pwr 
Out).

I've checked thevoltage on Vpots line. It was 0.55V.

Vpots line goes topin 7 of the MCU (PIC18C452 microcontroller, U6 on Control 
Board) whichseems to be an analog input.

Thus my next stephas been removing  MCU from the socket. As a result Vpots line 
went up to5V.

My conclusion is that MCU must be broken.

Am I right?

If positive: Whatelse shall I check before I order a new microcontroller from 
Elecraft (I'moverseas and don't want to order parts one by one).

Regards

Piotr, SP2BPD




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Re: [Elecraft] KPA500 Dead

[Alan - G4GNX]

With all due respect, if you don't know where to start looking, then 
please don't.


Unless you really know what you're doing, then you should not remove the 
lid. Fault finding could easily result in the need to power up and 
expose yourself to many hidden dangers.


It's been suggested that lack of AC power may be the cause. That should 
be a safe thing to check, without opening the KPA500.


Stay safe - send it back to Elecraft. :-)

73,

Alan. G4GNX


-- Original Message --
From: "Tom Berry" 
To: elecraft@mailman.qth.net
Sent: 05/06/2020 17:04:41
Subject: [Elecraft] KPA500 Dead


I was operating on FT8  20 meters for quite a long time with my KPA500 running 
about 400 watts and heard a few pops (like something arching).  Heard it a few 
more times then the amp went off.

Now it will not power on.  No lights, nothing.  I checked the fuse and it is OK.

Can you tell me where to start looking?


Thanks

Tom AAA4VV

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[Elecraft] KPA500 Dead

[Andy Durbin]

"Can you tell me where to start looking?"

A report of a similar event was posted just a few weeks ago.  Some of us were 
assuming it was a KPA500 failure but it turned out to be a failure of the input 
AC voltage.

Is AC power present?  Does the KPA500 power up if connected to a known good 
power outlet?

Andy, k3wyc
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Re: [Elecraft] FIXED--was NOT the feedline

[Grant Youngman]

DigiKey has it in 6” or 8” pieces of various diameters.  It runs around $25.00 
per piece, with quantity discounts.  Not inexpensive …

Grant NQ5T

> On Jun 5, 2020, at 12:13 PM, Peter Dougherty  wrote:
> 
> First time I've ever heard of this product and it's quite intriguing. Where
> is this available from in quantities a typical home station would use? I go
> through a 3 foot section of .75" marine grade heat shrink in about 3-5
> years.
> 
> - pjd
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net  On
> Behalf Of donov...@starpower.net
> Sent: Friday, June 5, 2020 2:03 AM
> To: Elecraft Reflector 
> Subject: Re: [Elecraft] FIXED--was NOT the feedline
> 
> This is an interesting video demonstrating the relative benefits of heat
> shrink and cold shrink tubing 
> 
> 
> www.youtube.com/watch?v=wSOXfkB6Jgw 
> 
> 
> 73 
> Frank 
> W3LPL 
> 

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Re: [Elecraft] Self-fusing liquid electrical tape

[Peter Dougherty]

My whole ground system is Cadweld bonded. I bought the new style shots and 
purchased the igniter from Joel and the RF Connection in MD. Couldn't have been 
happier. And they're fun to fire off, too! 

 - pjd

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Grant Youngman
Sent: Friday, June 5, 2020 12:05 PM
To: k2...@arrl.net
Cc: Elecraft Refl 
Subject: Re: [Elecraft] Self-fusing liquid electrical tape

Cad-weld isn’t expensive — $11-15 per weld depending on where you buy the 
stuff.  Typically sold in kits of 6 one-shot crucibles, and available for 
varying ground wire sizes on 1/2” or 5/8” ground rods.

Grant NQ5T

> On Jun 5, 2020, at 11:17 AM, Phil Kane  wrote:
> 
> On 6/4/2020 8:50 PM, Ed Tanton wrote:
> 
>> I should have mentioned that. I strip 5 or 6 inches of insulation. 
>> That was why I cleaned the top of the ground rod and sprayed it with 
>> electrical lubricant. I used a stainless steel hose clamp to hold the 
>> stripped wires against the ground rod at each end of the stripped 
>> wire portions. The next part is what I wrote about to start with.
> 
> Thank you for explaining that.  For our commercial and public safety 
> communication site grounding systems our firm insists on cad-weld at 
> all exposed and buried connection points but I would suspect that very 
> few hams, let alone residential or even commercial electricians, would 
> go to that length.  My mentor in that area, the late Tom Croda, who 
> during his lifetime was the national expert in comm site power and 
> grounding, would not settle for anything less.
> 
> 73 de K2ASP - Phil Kane
> Elecraft K2/100   s/n 5402
> 

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Re: [Elecraft] FIXED--was NOT the feedline

[Peter Dougherty]

First time I've ever heard of this product and it's quite intriguing. Where
is this available from in quantities a typical home station would use? I go
through a 3 foot section of .75" marine grade heat shrink in about 3-5
years.

 - pjd

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of donov...@starpower.net
Sent: Friday, June 5, 2020 2:03 AM
To: Elecraft Reflector 
Subject: Re: [Elecraft] FIXED--was NOT the feedline

This is an interesting video demonstrating the relative benefits of heat
shrink and cold shrink tubing 


www.youtube.com/watch?v=wSOXfkB6Jgw 


73 
Frank 
W3LPL 

- Original Message -

From: "Peter Dougherty"  
To: "Edward R Cole" , "Elecraft Reflector"
 
Sent: Thursday, June 4, 2020 3:01:59 PM 
Subject: Re: [Elecraft] FIXED--was NOT the feedline 

Ed, this is the stuff I use on my outdoor connectors: 
https://tinyurl.com/y7uqqwsb 
Marine grade adhesive lined. 3/4" for plain ol' PL259 connections, and 1" 
for N connectors. 

And I mis-spoke (mis-typed??) earlier. Had a senior moment when I said 
Scotch 130 and Scotch 88 was my default. That HAD BEEN my default. My new 
default from about 3 or 4 years ago is Scotch 130 and this heat shrink if 
it's in the air, and just the marine grade heat shrink if it's at ground 
level. I find this combination to be unbeatable. 


- pjd 

-Original Message- 
From: elecraft-boun...@mailman.qth.net  On

Behalf Of Edward R Cole 
Sent: Thursday, June 4, 2020 3:36 AM 
To: Elecraft Reflector  
Subject: Re: [Elecraft] FIXED--was NOT the feedline 

Some large coax connectors are supplied with heat shrink that has a melted 
inner "goo" which is very good sealant. I've found removal is not messy so 
apparently the "goo" cures in some manner. Pretty sure you can buy it at 
commercial electrical suppliers (but probably in 4-foot chunks which will 
cost you). I buy my ordinary heat shrink and tywraps (Thomas & Betts) from 
a local commercial electrical supply house. 

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Re: [Elecraft] Self-fusing liquid electrical tape

[Grant Youngman]

Cad-weld isn’t expensive — $11-15 per weld depending on where you buy the 
stuff.  Typically sold in kits of 6 one-shot crucibles, and available for 
varying ground wire sizes on 1/2” or 5/8” ground rods.

Grant NQ5T

> On Jun 5, 2020, at 11:17 AM, Phil Kane  wrote:
> 
> On 6/4/2020 8:50 PM, Ed Tanton wrote:
> 
>> I should have mentioned that. I strip 5 or 6 inches of insulation. That
>> was why I cleaned the top of the ground rod and sprayed it with
>> electrical lubricant. I used a stainless steel hose clamp to hold the
>> stripped wires against the ground rod at each end of the stripped wire
>> portions. The next part is what I wrote about to start with.
> 
> Thank you for explaining that.  For our commercial and public safety
> communication site grounding systems our firm insists on cad-weld at all
> exposed and buried connection points but I would suspect that very few
> hams, let alone residential or even commercial electricians, would go to
> that length.  My mentor in that area, the late Tom Croda, who during his
> lifetime was the national expert in comm site power and grounding, would
> not settle for anything less.
> 
> 73 de K2ASP - Phil Kane
> Elecraft K2/100   s/n 5402
> 

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[Elecraft] KPA500 Dead

[Tom Berry]

I was operating on FT8  20 meters for quite a long time with my KPA500 
running about 400 watts and heard a few pops (like something arching).  
Heard it a few more times then the amp went off.


Now it will not power on.  No lights, nothing.  I checked the fuse and 
it is OK.


Can you tell me where to start looking?


Thanks

Tom AAA4VV

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Re: [Elecraft] SETTING THE K2 REFERENCE OSCILLATOR

[Don Wilhelm]

Al,

The C22 setting does nothing to change the K2 display - you must run CAL 
PLL and CAL FIL (for all filters) before any change in the display takes 
place.  Normally, the reference oscillator only serves as a clock for 
the MCU - the frequency display does not depend on it.


See the K2 Dial Calibration on my website www.w3fpr.com.
If you are using RWM (which transmits only a carrier), you should use 
the method EA3ADV and I developed to use only a carrier instead of the 
transmitted tones such as those from WWV.


73,
Don W3FPR

On 6/5/2020 4:59 AM, W4RAM wrote:

Good morning,
I am looking for assistance to be able to properly complete the reference
oscillator calibration.

Situation: despite moving C22 I don't see any change or correction when I
try to zero beat signal from RWM (9,996.00)

Performed procedure:
1. I tuned the K2 with the RWM signal. I was able to "zero beat" in 9,998.25
LSB (diff. +2.25).
2. I connected the internal counter from P6 to TP1.
3. I adjusted C22 (moved counterclockwise)

I did not continue with Run CAL PLL and CAL FIL.
I am using vertical HF external antenna.


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Re: [Elecraft] Self-fusing liquid electrical tape

[Phil Kane]

On 6/4/2020 8:50 PM, Ed Tanton wrote:

> I should have mentioned that. I strip 5 or 6 inches of insulation. That
> was why I cleaned the top of the ground rod and sprayed it with
> electrical lubricant. I used a stainless steel hose clamp to hold the
> stripped wires against the ground rod at each end of the stripped wire
> portions. The next part is what I wrote about to start with.

Thank you for explaining that.  For our commercial and public safety
communication site grounding systems our firm insists on cad-weld at all
exposed and buried connection points but I would suspect that very few
hams, let alone residential or even commercial electricians, would go to
that length.  My mentor in that area, the late Tom Croda, who during his
lifetime was the national expert in comm site power and grounding, would
not settle for anything less.

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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Re: [Elecraft] KPA1500 power per frequency bin

[Andy Durbin]

"As has been mentioned - shouldn't be too difficult to do this with an external 
Arduino based controller.  "

My brain needed something to do while I was watching 30 m for new DX so I 
created a rough draft proposal for "power per frequency bin".  I created this 
to stimulate discussion not because I have any intention of coding it myself.  
I don't have a KPA1500 and my current power management scheme is adequate for 
my KPA500.

https://www.dropbox.com/s/scuxibyl6laueak/Power%20by%20bin%20-%20draft%201%20k3wyc.pdf?dl=0

73,
Andy, k3wyc





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Re: [Elecraft] FIXED--was NOT the feedline

[Charlie T]

I have successfully used a method of water-proofing a coax splice by first 
coating the outside of the connectors with silicone (di-electric) grease, then 
wrapping about 18" X 5" (or?) piece of plain plastic garbage bag around the 
junction.
The next step is to wrap that with several layers of good electrical tape 
extending the wrap about 2 inches past the plastic.  I do NOT like the scotch 
stuff since the adhesive gets gooey over time.  Believe it or not, the cheap 
chicom stuff Harbor Freight sells is quite good.  I have opened up fittings 
done this way this over ten years later and the connection is bright & shiny 
with no hint of water corrosion.

73, Charlie k3ICH

 

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Re: [Elecraft] SETTING THE K2 REFERENCE OSCILLATOR

[Dave Van Wallaghen]

Hi Al,

The VFO tuning of the K2 is drivin by its low phase noise PLL and a 
lookup table (created by CAL PLL) as well as the values stored for the 
BFO settings (CAL FIL). Therefore, after adjusting the 4MHz oscillator 
via C22, those routines must also be run as they depend on the new 
crystal frequency you just adjusted (with the exception of CW mode - see 
Don's explanation on his website).


If adjusted correctly, you may be able to get the VFO withing 20Hz. Don 
Wilhelm (W3FPR) has a web page that explains this operation and offers 
some background as to the K2 VFO design and operation concerning this 
adjustment. He also lists some other alternative methods.


For the adjustments I do for the K2's that come across my bench, I run 
CAL FCTR and use the probe to measure the output of my Leo Bodnar GPSDO 
with one port set to 20MHz. I adjust C22 until the LCD display matches 
20MHz (this is fairly tough to do as C22 is not very granular). But 
after I get it set, I then run CAL PLL and the CAL FIL where I go 
through each filter for each mode and adjust the frequency up and then 
back down to the original value. This causes the routine to rewrite the 
entry. The key to this adjustment is allowing the K2 to reach a steady 
operating temperature.


You can find Don's page here: http://www.w3fpr.com/dial_cal.html

73,
Dave W8FGU

-- Original Message --
From: "W4RAM" 
To: elecraft@mailman.qth.net
Sent: 6/5/2020 4:59:13 AM
Subject: [Elecraft] SETTING THE K2 REFERENCE OSCILLATOR


Good morning,
I am looking for assistance to be able to properly complete the reference
oscillator calibration.

Situation: despite moving C22 I don't see any change or correction when I
try to zero beat signal from RWM (9,996.00)

Performed procedure:
1. I tuned the K2 with the RWM signal. I was able to "zero beat" in 9,998.25
LSB (diff. +2.25).
2. I connected the internal counter from P6 to TP1.
3. I adjusted C22 (moved counterclockwise)

I did not continue with Run CAL PLL and CAL FIL.
I am using vertical HF external antenna.

Thank you for any advice.

V/R

Al
W4RAM






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Re: [Elecraft] KPA1500 fan mod done - MUCH better

[exbpi]

Dave,

So, are these mods documented somewhere on the Elecraft site? I have been 
unable to locate them. Further, I can't even get Elecraft to respond about when 
they will provide schematics for the KPA1500.

Thanks

Mike
K7PI


-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Dave
Sent: Thursday, June 4, 2020 22:41
To: Eric Norris 
Cc: elecraft@mailman qth. net 
Subject: Re: [Elecraft] KPA1500 fan mod done - MUCH better

Yeah PSU fan noise is on par with the fans in the Flex 6700 now. PC is almost 
completely silent. Thinking of locating the amp, radio, and 4O3A 2x8 antenna 
switch in my garage in a half height server cabinet. Then I could hear myself 
think, but maybe I don’t want to hear myself ;-)

The two chip resistor mod on filter board was fun. I have experience with 
surface mount rework so no big deal. One resistor was the size of “16” onthe 
date on a penny (2016).

Other mods - they installed zener diodes tonthe gates on the LDMOS devices to 
protect against overdrive. That is one thing the LDMOS devices do not like.

Mybamp uses a pair of NXP 1K50H devices which I feel are more rugged than 
BLF188 and 189s. I heard early amps used the 188s but no proof of that.

Have fun! 

73
Dave

Sent from my iPad

> On Jun 5, 2020, at 1:10 AM, Eric Norris  wrote:
> 
> 
> I had completely forgotten that I did this mod, and the two resistors mod.  
> That, and the piece of grit or whatever that was stuck in one of the PSU fans 
> making it scream like a banshee, took the KPA1500 PSU fan noise from being 
> intolerable to unnoticable.  
> 
> Good times!  Ain't it grand!  
> 
> 73 Eric WD6DBM
> 
>> On Thu, Jun 4, 2020, 4:59 PM  wrote:
>> Hi All,
>> 
>> 
>> 
>> Received the new LED board for my KPA1500 power supply. Easy to swap 
>> out, six plugs and two screws. You can move one plug at a time to the 
>> new board so there is no chance of screwing anything up. To put the 
>> screws back in I suggest a Phillips screwdriver with magnetic tip. It 
>> took more time to remove the 16 screws from the top cover than to swap the 
>> board.
>> 
>> 
>> 
>> THANK YOU Elecraft!
>> 
>> 
>> 
>> 73
>> 
>> Dave wo2x
>> 
>> 
>> 
>> 
>> 
>> 
>> 
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>> norrislawfi...@gmail.com
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Re: [Elecraft] Tech Support - I Appreciate the Difficulty...

[Mike Cizek W0VTT]

ONLY 3 weeks?  Mine started 7 April and is still going on.  The longest
delays seem to be between our contact person and the "K3 expert".
Eliminating the middle man would help a LOT.

K3s #11894  Overdrive Faults

--
73,
Mike Cizek W0VTT 

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of John Stengrevics
Sent: Friday, June 05, 2020 07:30
To: Elecraft Refl
Subject: [Elecraft] Tech Support - I Appreciate the Difficulty...

of the current situation, but wow.

I have been going back and forth with tech support via email (which of
course is half the problem) for 3 weeks now.  I send an email, it gets
passed to the K3S expert, he gets a garbled message, I get a response that
makes no sense, I send another message, it gets passed along, I get another
response that makes no sense, and on and on ad infinitum.

John
WA1EAZ
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[Elecraft] Tech Support - I Appreciate the Difficulty...

[John Stengrevics]

of the current situation, but wow…

I have been going back and forth with tech support via email (which of course 
is half the problem) for 3 weeks now.  I send an email, it gets passed to the 
K3S expert, he gets a garbled message, I get a response that makes no sense, I 
send another message, it gets passed along, I get another response that makes 
no sense, and on and on ad infinitum.

John
WA1EAZ
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[Elecraft] Cold Shrink Tubing (was Re: FIXED)

[Lyn Norstad]

Great video, Frank.  Thanks for sharing.  I had no idea cold shrink could
potentially perform that well.

Is that what you're using on buried cables?

73
Lyn, W0LEN


> -Original Message-
> From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
donov...@starpower.net
> Sent: Friday, June 05, 2020 1:03 AM
> To: Elecraft Reflector
> Subject: Re: [Elecraft] FIXED--was NOT the feedline
> 
> This is an interesting video demonstrating the relative benefits of 
> heat shrink and cold shrink tubing 
>
>
> www.youtube.com/watch?v=wSOXfkB6Jgw 
>
> 
> 73 
> Frank 
> W3LPL 

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[Elecraft] SETTING THE K2 REFERENCE OSCILLATOR

[W4RAM]

Good morning,
I am looking for assistance to be able to properly complete the reference
oscillator calibration.

Situation: despite moving C22 I don't see any change or correction when I
try to zero beat signal from RWM (9,996.00)

Performed procedure:
1. I tuned the K2 with the RWM signal. I was able to "zero beat" in 9,998.25
LSB (diff. +2.25).
2. I connected the internal counter from P6 to TP1.
3. I adjusted C22 (moved counterclockwise)

I did not continue with Run CAL PLL and CAL FIL.
I am using vertical HF external antenna.

Thank you for any advice.

V/R

Al
W4RAM






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Re: [Elecraft] FIXED--was NOT the feedline

[donovanf]

This is an interesting video demonstrating the relative benefits of 
heat shrink and cold shrink tubing 


www.youtube.com/watch?v=wSOXfkB6Jgw 


73 
Frank 
W3LPL 

- Original Message -

From: "Peter Dougherty"  
To: "Edward R Cole" , "Elecraft Reflector" 
 
Sent: Thursday, June 4, 2020 3:01:59 PM 
Subject: Re: [Elecraft] FIXED--was NOT the feedline 

Ed, this is the stuff I use on my outdoor connectors: 
https://tinyurl.com/y7uqqwsb 
Marine grade adhesive lined. 3/4" for plain ol' PL259 connections, and 1" 
for N connectors. 

And I mis-spoke (mis-typed??) earlier. Had a senior moment when I said 
Scotch 130 and Scotch 88 was my default. That HAD BEEN my default. My new 
default from about 3 or 4 years ago is Scotch 130 and this heat shrink if 
it's in the air, and just the marine grade heat shrink if it's at ground 
level. I find this combination to be unbeatable. 


- pjd 

-Original Message- 
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Edward R Cole 
Sent: Thursday, June 4, 2020 3:36 AM 
To: Elecraft Reflector  
Subject: Re: [Elecraft] FIXED--was NOT the feedline 

Some large coax connectors are supplied with heat shrink that has a melted 
inner "goo" which is very good sealant. I've found removal is not messy so 
apparently the "goo" cures in some manner. Pretty sure you can buy it at 
commercial electrical suppliers (but probably in 4-foot chunks which will 
cost you). I buy my ordinary heat shrink and tywraps (Thomas & Betts) from 
a local commercial electrical supply house. 

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