Re: [Elecraft] low IF out on K3

2016-04-08 Thread Enrico Lorenzoni IU3AZC 


hello everyone. My K3 is # 80XX so it should be fine.
With my multimeter I checked R8 and it's reading 270ohms (mounted on the 
board).
From the schematic I guess there should be no DC flowing and that I 
should read 13.3k, so I think R8 is broken or the problem is in Q10 fet, 
being resistive on the gate.
anyone has experience in this, before I start desoldering components and 
measure them?


thanks

Enrico



Il 07/04/2016 22:24, Ron D'Eau Claire ha scritto:

Older K3 transceivers (built before September 2009) do have lower output
than later units. Elecraft published a modification that involves replacing
a single resistor to bring up the level.

They have a kit that includes an SMD and a leaded resistor (you can use
either, only one is installed). Order the KIO3BUFFKT. You can see what is
involved by reviewing the instructions available for download here:

http://www.elecraft.com/K3/mods/IF_Output_Buffer_Gain_Mod_Rev_A.pdf

If you have a 13K ohm, 1/8 watt leaded resistor or if you'd rather work with
an SMD, a 13K 0805 size resistor, you won't need the kit.

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Enrico
Lorenzoni IU3AZC
Sent: Thursday, April 7, 2016 12:55 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] low IF out on K3

hello everyone,
I just compared my k3 with a friend's one and my IF out is much lower than
his k3.
I suspected it when listening on a softrock, but now I can see a difference
like 10 or 20db off.

So I inspected my k3 and the IF out connector is fine. Multimeter says 0
ohms between bnc contacts and P86 pins on motherboard.
What can I check next?
Anyone did fix this same issue?

thanks

Enrico IU4AZC
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Re: [Elecraft] low IF out on K3

2016-04-07 Thread Ron D'Eau Claire 
Older K3 transceivers (built before September 2009) do have lower output
than later units. Elecraft published a modification that involves replacing
a single resistor to bring up the level. 

They have a kit that includes an SMD and a leaded resistor (you can use
either, only one is installed). Order the KIO3BUFFKT. You can see what is
involved by reviewing the instructions available for download here:

http://www.elecraft.com/K3/mods/IF_Output_Buffer_Gain_Mod_Rev_A.pdf

If you have a 13K ohm, 1/8 watt leaded resistor or if you'd rather work with
an SMD, a 13K 0805 size resistor, you won't need the kit. 

73, Ron AC7AC 

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Enrico
Lorenzoni IU3AZC
Sent: Thursday, April 7, 2016 12:55 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] low IF out on K3

hello everyone,
I just compared my k3 with a friend's one and my IF out is much lower than
his k3.
I suspected it when listening on a softrock, but now I can see a difference
like 10 or 20db off.

So I inspected my k3 and the IF out connector is fine. Multimeter says 0
ohms between bnc contacts and P86 pins on motherboard.
What can I check next?
Anyone did fix this same issue?

thanks

Enrico IU4AZC
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Re: [Elecraft] low IF out on K3

2016-04-07 Thread Enrico Lorenzoni IU3AZC 


Hi, I confirm: R8 is labeled "133", so it is a 13k resistor.

Enrico


Il 07/04/2016 22:10, Art Hejduk ha scritto:

Enrico,

Yours should definitely have this change done then.  See the attached 
PDF file.


73,
Art  WB8ENE

On Thu, Apr 7, 2016 at 4:04 PM, Enrico Lorenzoni IU3AZC 
mailto:iu3...@gmail.com>> wrote:



Hello, my K3 is 80xx and my friend's is 38xx

thanks
Enrico


Il 07/04/2016 22:03, Art Hejduk ha scritto:

Enrico,

How old is your K3?  I believe they made a change to increase the
output on the "newer" units.  I'm not sure which serial number
this began on, but mine has the higher output, and it is serial
number 43XX.

73,
Art  WB8ENE

On Thu, Apr 7, 2016 at 3:55 PM, Enrico Lorenzoni IU3AZC
mailto:iu3...@gmail.com>> wrote:

hello everyone,
I just compared my k3 with a friend's one and my IF out is
much lower than his k3.
I suspected it when listening on a softrock, but now I can
see a difference like 10 or 20db off.

So I inspected my k3 and the IF out connector is fine.
Multimeter says 0 ohms between bnc contacts and P86 pins on
motherboard.
What can I check next?
Anyone did fix this same issue?

thanks

Enrico IU4AZC
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Please help support this email list:
http://www.qsl.net/donate.html
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Re: [Elecraft] low IF out on K3

2016-04-07 Thread Enrico Lorenzoni IU3AZC 


Hello, my K3 is 80xx and my friend's is 38xx

thanks
Enrico


Il 07/04/2016 22:03, Art Hejduk ha scritto:

Enrico,

How old is your K3?  I believe they made a change to increase the 
output on the "newer" units.  I'm not sure which serial number this 
began on, but mine has the higher output, and it is serial number 43XX.


73,
Art  WB8ENE

On Thu, Apr 7, 2016 at 3:55 PM, Enrico Lorenzoni IU3AZC 
mailto:iu3...@gmail.com>> wrote:


hello everyone,
I just compared my k3 with a friend's one and my IF out is much
lower than his k3.
I suspected it when listening on a softrock, but now I can see a
difference like 10 or 20db off.

So I inspected my k3 and the IF out connector is fine. Multimeter
says 0 ohms between bnc contacts and P86 pins on motherboard.
What can I check next?
Anyone did fix this same issue?

thanks

Enrico IU4AZC
__
Elecraft mailing list
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Re: [Elecraft] low IF out on K3

2016-04-07 Thread Art Hejduk 
Enrico,

How old is your K3?  I believe they made a change to increase the output on
the "newer" units.  I'm not sure which serial number this began on, but
mine has the higher output, and it is serial number 43XX.

73,
Art  WB8ENE

On Thu, Apr 7, 2016 at 3:55 PM, Enrico Lorenzoni IU3AZC 
wrote:

> hello everyone,
> I just compared my k3 with a friend's one and my IF out is much lower than
> his k3.
> I suspected it when listening on a softrock, but now I can see a
> difference like 10 or 20db off.
>
> So I inspected my k3 and the IF out connector is fine. Multimeter says 0
> ohms between bnc contacts and P86 pins on motherboard.
> What can I check next?
> Anyone did fix this same issue?
>
> thanks
>
> Enrico IU4AZC
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to valvetb...@gmail.com
>
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