Single best tip I've learned all year from this reflector. And there
were many good ones.
Eric KE6US
On 10/29/2017 4:24 AM, Drew AF2Z wrote:
> Also, you can search the pdf schematics- very convenient when tracing
> through circuits spanning multiple sheets.
>
> 73,
> Drew
> AF2Z
: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Woolley
Sent: Sunday, October 29, 2017 6:04 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] PA Transistors Maintenance in K2
As far as I can tell, no torque settings are given for any
It is possible that an explicit torque has never been calculated. It is
not a particularly hard thing to do however.
I do not have a K2, so I can't do it, but here's the idea:
1) Fastener size/type, material, thread spec: (e.g. 4-40 x ___ pan head,
phillips, zinc coated, non-rated steel
2)
As far as I can tell, no torque settings are given for any of the
fasteners, wouldn't it be an idea to provide those, for people who do
have suitable tools. Generally there are just warnings not to over-tighten.
On 28/10/17 20:24, Mel Farrer wrote:
If the people at Elecraft have done their
, Cameron - AF7DK/GM7LQR
From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> on behalf
of Dauer, Edward <eda...@law.du.edu>
Sent: Friday, October 27, 2017 8:15 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] PA Transistors Maintena
The .pdf reader search function is an excellent way to find
where the off-sheet connections go when reading the Elecraft schematics.
73 Bill AE6JV
On 10/28/17 at 12:08 PM, cameronfranceyut...@hotmail.com
(Cameron Francey) wrote:
A nice tip which I use when looking for anything in any sort
Ed,
I was speaking of the KPA100 amp for the K2. I don't think the KXPA100
needs any maintenance.
73,
Don W3FPR
On 10/28/2017 7:52 PM, Edward R Cole wrote:
Don,
I ran my KXPA100 mobile for 5,000 miles to-Seattle and back to AK this
spring. Is there any advise for maint for extended
t;eda...@law.du.edu>,"elecraft@mailman.qth.net"
<elecraft@mailman.qth.net>
Subject: Re: [Elecraft] PA Transistors Maintenance in K2
Message-ID: <d126e96c-05e8-18a3-ca38-30660b1b6...@embarqmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Ted,
Not Q7 an
ancey; Dauer, Edward; elecraft@mailman.qth.net
Subject: Re: [Elecraft] PA Transistors Maintenance in K2
Ted,
If the people at Elecraft have done their job and mounted the transistor
properly with the correct torque on the mounting hardware procedure, no
additional maintainance is require
com>
To: "Dauer, Edward" <eda...@law.du.edu>; "elecraft@mailman.qth.net"
<elecraft@mailman.qth.net>
Sent: Saturday, October 28, 2017 12:10 PM
Subject: Re: [Elecraft] PA Transistors Maintenance in K2
A nice tip which I use when looking for anything in any
Mel,
That is NOT true for the KPA100 power transistors - and it is not
because of initial torquing. The thermal pads take both time and heat
to fully conform to the heatsink and any irregularities in the
transistor surface.
BTW, with the KPA100, Elecraft has "done their job" when the parts
lt;elecraft@mailman.qth.net>
Sent: Saturday, October 28, 2017 12:10 PM
Subject: Re: [Elecraft] PA Transistors Maintenance in K2
A nice tip which I use when looking for anything in any sort of .pdf manual,
Elecraft included as I have accumulated quite a number of them over time is to
use the se
aw.du.edu>
Sent: Friday, October 27, 2017 8:15 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] PA Transistors Maintenance in K2
I vaguely remember reading somewhere that after some number of hours of
operation – maybe 50 – the hardware holding Q7 and Q8 onto the heat sink should
be tightene
Ted,
Not Q7 and Q8 in the base K2, but for the KPA100, yes tightening the
screws for Q1 and Q2 should be done after 5 to 10 hours of operation at
greater then 50 watts.
73,
Don W3FPR
On 10/27/2017 11:15 PM, Dauer, Edward wrote:
I vaguely remember reading somewhere that after some number of
On page 51 of the Rev 2 KPA100 manual, I found the following:
--
IMPORTANT: The hardware holding the RF power
transistors in place will loosen slightly during initial use.
After 5-10 hours of normal operation at 50 watts or more,
remove the KPA100 assembly and its shield, then
I vaguely remember reading somewhere that after some number of hours of
operation – maybe 50 – the hardware holding Q7 and Q8 onto the heat sink should
be tightened, I presume to maintain good heat conduction from the tabs to the
sink. But I can’t find that instruction in the manual now.
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