Probably best to change the topic of this, as it has drifted into a different
area.
Eric
/elecraft.com/
On 11/13/2015 9:01 PM, Jim Brown wrote:
On Fri,11/13/2015 1:30 PM, Wes (N7WS) wrote:
Note, there is no mention of any directivity, or lack thereof, so I would
take it that this is a theoret
Eric Swartz was very clear about this in a message to this group yesterday:
"Component failure like this can occur in any manufacturer's radio or amplifier
for many reasons, such as power line surges, nearby lightning strikes,
operating with excessive SWR, transmitting into a wrong antenna etc.
But why would a filter for a band that the operator had never used fail?
Vic 4X6GP/K2VCO
> On 13 Nov 2015, at 11:52 PM, Wes (N7WS) wrote:
>
> Why would one filter, that like just like all of the others is switched into
> the circuit by a relay on each end, fail while none of the others do not
On Fri,11/13/2015 1:30 PM, Wes (N7WS) wrote:
Note, there is no mention of any directivity, or lack thereof, so I
would take it that this is a theoretical free-space value.
One could do that, of course, but your original post brought ground
conductivity into the computation, which is, IMO, enti
Why would one filter, that like just like all of the others is switched into the
circuit by a relay on each end, fail while none of the others do not?
On 11/11/2015 1:32 PM, Jim Brown wrote:
The LPF is on the output of the amplifier. One possible cause of failure could
be lightning.
___
Then I guess I could just "vaguely" follow the rules, sort of like the
President, his cabinet, the heads of the alphabet soup agencies, IRS, EPA, FBI,
NSA, VA, ICE, DHS,... do.
That said, I think you're making this too complicated. The rule states:
"For the purpose of computing ERP, the tr
On Wed,11/11/2015 1:30 PM, Wes (N7WS) wrote:
If I use an inductively-loaded vertical monopole with a minimal ground
screen over Arizona ground my "dBd gain" might well be several dB
negative. In which case, I'm allowed to compensate for that, and line
loss, in determining amplifier output power
I guess I'll have to repeat myself.
There is no requirement to have a "measured" antenna; calculated gain (loss) is
permitted. It's kind of like high school algebra, you just have to show your
work. With modern analysis tools such as Eznec, it is almost trivial to do so,
if you know what you
-identified which
band the destroyed LPF components were from.
73,
Eric
elecraft.com
_..._
> -Original Message-
> From: Elecraft
> [mailto:[hidden email]] On
> Behalf Of w4grj
> Sent: Thursday, November 12, 2015 7:14 AM
> To: [hidden email]
> Subject: Re: [Elec
aft.com
_..._
> -Original Message-
> From: Elecraft
> [mailto:elecraft-boun...@mailman.qth.net] On
> Behalf Of w4grj
> Sent: Thursday, November 12, 2015 7:14 AM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KPA500 troubles
>
> I need to correct t
:[hidden email]] On
Behalf Of w4grj
Sent: Thursday, November 12, 2015 7:14 AM
To: [hidden email]
Subject: Re: [Elecraft] KPA500 troubles
I need to correct the information on the repair
cost
It was $615 with shipping not $650 as I previously
reported.
Jack W4GRJ
On Thursday
: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 troubles
I need to correct the information on the repair
cost
It was $615 with shipping not $650 as I previously
reported.
Jack W4GRJ
On Thursday, November 12, 2015, W4GRJ
wrote:
Since I have never operated on 60m ever... You
figure
I need to correct the information on the repair cost
It was $615 with shipping not $650 as I previously reported.
Jack W4GRJ
On Thursday, November 12, 2015, W4GRJ wrote:
Since I have never operated on 60m ever... You figure it out
Jack
W4GRJ
On Nov 11, 2015, at 3:33 PM, Jim Brown-10
@mailman.qth.net
Subject: Re: [Elecraft] KPA500 troubles
Kpa500 on 60 is illegal unless you have a *measured and documented* VERY lossy
antenna that would reduce the effective radiated power to the same as 100 watts
on a dipole. The simple 99 percent answer is that on 60m SHUT OFF the Kpa500
and run
Kpa500 on 60 is illegal unless you have a *measured and
documented* VERY lossy antenna that would reduce the effective radiated
power to the same as 100 watts on a dipole. The simple 99 percent answer is
that on 60m SHUT OFF the Kpa500 and run 100 watts barefoot.
73, Guy K2AV
On Thursday, Novembe
Like I said, never ever operated on 60M, I mean never without the amp.
When discussed with Craig at Elecraft he could not explain the failure, just
referred to a component failure.
Jack
W4GRJ
On Nov 11, 2015, at 3:59 PM, David Pratt [via Elecraft]
wrote:
Same in the UK, Jim. Operation on 60
Since I have never operated on 60m ever... You figure it out
Jack
W4GRJ
On Nov 11, 2015, at 3:33 PM, Jim Brown-10 [via Elecraft]
wrote:
On Wed,11/11/2015 12:10 PM, W4GRJ wrote:
> Got the KPA500 back from Elecraft.
> Problem found: L22 and other components in the 60M low pass filter circuit
x27;s sometimes just a case of luck, or that chap, what's his name?, oh yeah,
Murphy.
73
Gary
-Original Message-
From: "David G4DMP"
Sent: 12/11/2015 6:58 AM
To: "j...@audiosystemsgroup.com"
Cc: "elecraft@mailman.qth.net" ;
"w4...@satterfield.org&qu
The KPA500 is a good small amp I use mine with an IC-9100 most of the time and
have not had any real issues with it in 4 yrs. now. For the K3's and K2 I use
Alpha amps an 87A and a newer 9500 for HF use. All I can say the brick on the
key with forever in the ads they run does say a lot. But it's
*§ 97.313 Transmitter power standards*.
"(i) No station may transmit with an effective radiated power (ERP) exceeding
100 W PEP on the 60 m
band. For the purpose of computing ERP, the transmitter PEP will be multiplied
by the antenna gain
relative to a half-wave dipole antenna. A half-wave dipo
Same in the UK, Jim. Operation on 60m does not require the use of a
KPA500 unless one wants to contravene the terms of one's license.
73 de David G4DMP
In a recent message, Jim Brown writes
On Wed,11/11/2015 12:10 PM, W4GRJ wrote:
Got the KPA500 back from Elecraft.
Repair $650 later: Replac
On Wed,11/11/2015 12:10 PM, W4GRJ wrote:
Got the KPA500 back from Elecraft.
Problem found: L22 and other components in the 60M low pass filter circuit
burnt through the LPF PCB.
60M LPF??? Last I looked, the US power limit on 60M is 100W relative to
a half wave dipole.
Repair $650 later:
Got the KPA500 back from Elecraft.
Problem found: L22 and other components in the 60M low pass filter circuit
burnt through the LPF PCB.
Repair $650 later: Replaced low pass filter module and installed QSK mod.
On the phone I asked what caused the failure, answer was no idea other than
component f
It has been sent to Elecraft.will advise results when I get it back
SN 1767
From: mcduffie [via Elecraft]
[mailto:ml-node+s365791n7609384...@n2.nabble.com]
Sent: Wednesday, October 21, 2015 10:05 AM
To: W4GRJ
Subject: Re: KPA500 troubles
On Tue, 20 Oct 2015 08:58:17 -0700 (MST), ok1rp wro
On Tue, 20 Oct 2015 08:58:17 -0700 (MST), ok1rp wrote:
> if your KPA500 has LPF board rev. D or earlier then You will need to make
> LPF TR Switch Rework REV5 modification, Elecraft parts kit: E850607. But
> maybe there is another issue in your case.
Apparently, I missed the OP on this. What is
Peter, thanksamp on it's way to Elecraft.
I will report results when I get it back.
Jack
W4GRJ
On Oct 20, 2015, at 11:58 AM, ok1rp [via Elecraft]
wrote:
Hi Jack,
if your KPA500 has LPF board rev. D or earlier then You will need to make LPF
TR Switch Rework REV5 modification, Elecraft par
Does anyone have a serial number for the changeover? I don't see
anything on the Elecraft wab page.
Buck
k4ia K3 #101
Honor Roll 333
8B DXCC
On 10/20/2015 11:58 AM, ok1rp wrote:
Hi Jack,
if your KPA500 has LPF board rev. D or earlier then You will need to make
LPF TR Switch Rework REV5 modi
Hi Petr,
I can't find this mod for the KPA500 on the Elecraft site. In fact, I can't
find
any KPA500 mods.
Where is it on the web site, please? I must be looking in the wrong place...
73
Stewart G3RXQ
On Tue, 20 Oct 2015 08:58:17 -0700 (MST), ok1rp wrote:
> Hi Jack,
>
> if your KPA500 has LPF
Hi Jack,
if your KPA500 has LPF board rev. D or earlier then You will need to make
LPF TR Switch Rework REV5 modification, Elecraft parts kit: E850607. But
maybe there is another issue in your case.
Try to read first then decide. If you want and you have SMD tools then You
can try to make this mo
o:elecraft-boun...@mailman.qth.net] On Behalf Of W4GRJ
Sent: Monday, October 19, 2015 5:20 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500 troubles
All of a sudden my KPA500 is misbehaving. It sounds like it is arcing inside
and smells the classic something is burning smell. SWR LED's are dancin
y, October 19, 2015 5:20 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500 troubles
All of a sudden my KPA500 is misbehaving. It sounds like it is arcing inside
and smells the classic something is burning smell. SWR LED's are dancing
upwards as it arcs.
KAT500 tuner has the SWR aroun
Failing pin diode switch ? (not the PIN diode itself, but the
semiconductor switching it)
73
Arie PA3A
Op 19-10-2015 om 14:20 schreef W4GRJ:
All of a sudden my KPA500 is misbehaving. It sounds like it is arcing inside
and smells the
classic something is burning smell. SWR LED's are dancing
K4KAY
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of W4GRJ
Sent: Monday, October 19, 2015 8:20 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500 troubles
All of a sudden my KPA500 is misbehaving. It sounds like it is arcing inside
and smell
Power corrupts...
Jim
W6AIM
.
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of w4grj
Sent: Monday, October 19, 2015 6:07 AM
To: 'efortner'; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 trou
f Of W4GRJ
Sent: Monday, October 19, 2015 8:20 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500 troubles
All of a sudden my KPA500 is misbehaving. It sounds like it is arcing inside
and smells the classic something is burning smell. SWR LED's are dancing
upwards as it arcs.
KAT500 tuner ha
tober 19, 2015 8:20 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500 troubles
All of a sudden my KPA500 is misbehaving. It sounds like it is arcing inside
and smells the classic something is burning smell. SWR LED's are dancing
upwards as it arcs.
KAT500 tuner has the SWR around 1.3
All of a sudden my KPA500 is misbehaving. It sounds like it is arcing inside
and smells the
classic something is burning smell. SWR LED's are dancing upwards as it
arcs.
KAT500 tuner has the SWR around 1.3:1
I will probably send it off to Elecraft but thought I would ask here for
suggestions to
lo
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