[Elecraft] low IF out on K3

[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-bounces at mailman.qth.net] On Behalf Of Enrico
> Lorenzoni IU3AZC
> Sent: Thursday, April 7, 2016 12:55 PM
> To: elecraft at 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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