Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

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

Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

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

Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

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

Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

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?

Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

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

Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

: 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 found

Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

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

Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

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

Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

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

Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

:34 PM To: Brian Hunt <huntin...@coastside.net> Cc: Elecraft@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

[Elecraft] K3 powers off when after several minutes of 12W carrier

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

Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

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

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 > On Mar 28, 2018, at 6:24 PM, Brian Hunt wrote: > >

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 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

Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

et <elecraft-boun...@mailman.qth.net> On > Behalf Of Erik Basilier > 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 wideban

Re: [Elecraft] K3 powers off when after several minutes of 12W carrier

Behalf Of Erik Basilier 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 running high

[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 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