Don:
I have the K3-KPA500-KAT500 purchased in August 2014. Using the Y-Box offered
by Bob Wilson, N6TV which he configured me, I have the K3 attached to Antenna
Genius (AG) Radio Port A with BCD and it works well. Similarly, I’m using the
USB interface on the Flex-6700 to provide BCD to the
Tony,
Unless you have a very old K3, the thermal pads should already be in
place. Remove the rear bottom panel to see if they are present.
The thermal conductivity of the pads is the important parameter. Get
the correct thermal pads from Elecraft, they are effective p/n E72 -
Adhesive
Yes that's my experience to. I get much better IMD at 20W than at 12 W. It
would be better if the KPA3A, if present, was used for anything above 10W.
/Johan, SM0XHJ
On Thursday, 29 March 2018 14:39:49 CEST Wes Stewart wrote:
> Doubt that. From what I've gathered during a lot of TX IMD testing
I've blown the LPA's twice running with Ft8 at 12w, with and without
pads. They do not like 12w for extended times, period ... proceed with
caution! You can run 11w all day with no problems.
73 Dwight NS9I
On 3/29/2018 7:50 AM, hawley, charles j jr wrote:
How do we know that’s pushing it? Ma
Doubt that. From what I've gathered during a lot of TX IMD testing on my
original K3 and my K3S, with several (lost count) different LPA and HPA modules,
it's a 10W amp. It's allowed to go to 12W but that's a really, really bad idea,
from an IMD standpoint. IIRC it's been asked that this be "
: Wednesday, March 28, 2018 7:24 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 powers off when after several minutes of 12W
carrier
For folks who run lots of high duty cycle modes, Elecraft is now
recommending 'thermal pads' between the LPA transistors and the bottom
cover. I
How do we know that’s pushing it? Maybe the LPA is designed for 20 Watts and
the K3 cuts them off at 12 Watts.
Chuck Jack
KE9UW
Sent from my iPhone, cjack
> On Mar 28, 2018, at 7:23 PM, "j...@kk9a.com" wrote:
>
> Instead of pushing the 12 watt PA this hard it would sure be nice (and
> clean
Erik K7TV
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Brian Hunt
Sent: Wednesday, March 28, 2018 4:24 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 powers off when after several minutes of 12W
carrier
For folks who run lots of high duty cycle modes, Elecr
My K3 is #4113 factory assembled and delivered in April 2010. I'm pretty sure
the bottom cover had never been off when I did the update mods a couple months
ago. That's when I asked Elecraft support about it and I assumed it had been
added to later #s. I've never had any issues but run mostly CW
@mailman.qth.net
Subject: Re: [Elecraft] K3 powers off when after several minutes of 12W
carrier
So there was a time early on for the K3 when the pads were not installed? I
looked at my 2010 assembly instructions and they required them. So I must
have put them in.
Chuck Jack
KE9UW
Sent from my iPhone, cjack
Instead of pushing the 12 watt PA this hard it would sure be nice (and
cleaner) to have the option of using the KPA3A for 10-12 watts output.
John KK9A
K7TV wrote:
I have been testing sustained power capabilities of wideband HF transformers
for feeding EFHW antennas. This involves running high
Any chance of model confusion between K2 and K3? I recall adding them to
my K2 ... a case of having to hold my tongue just so in order to hold them
and their hardware in place. Not a place for fat fingers!
73!
K0PP
On Wed, Mar 28, 2018, 17:36 hawley, charles j jr
wrote:
> So there was a time
So there was a time early on for the K3 when the pads were not installed? I
looked at my 2010 assembly instructions and they required them. So I must have
put them in.
Chuck Jack
KE9UW
Sent from my iPhone, cjack
> On Mar 28, 2018, at 6:24 PM, Brian Hunt wrote:
>
> For folks who run lots of
For folks who run lots of high duty cycle modes, Elecraft is now recommending
'thermal pads' between the LPA transistors and the bottom cover. I found this
out when I was doing some mods to my 10yo K3 and the instructions said to
install them and I didn't have 'em. You can get them from Elecraft
r
> Sent: Tuesday, March 27, 2018 9:42 PM
> To: Elecraft@mailman.qth.net
> Subject: [Elecraft] K3 powers off when after several minutes of 12W carrier
>
> I have been testing sustained power capabilities of wideband HF transformers
> for feeding EFHW antennas. This involves runnin
, March 27, 2018 9:42 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] K3 powers off when after several minutes of 12W carrier
I have been testing sustained power capabilities of wideband HF transformers
for feeding EFHW antennas. This involves running high power through HF
transformers back to back
I have been testing sustained power capabilities of wideband HF transformers
for feeding EFHW antennas. This involves running high power through HF
transformers back to back into a dummy load. When running 200W out of the
KPA500, the K3 was indicating 12W, and I think that means the 100W PA was
not
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