K3 :: hardware AGC mod kit

[inventor61 .]

I have my K3 on the bench, doing a series of updates and whatnot= ... since
I just got and assembled the P3 I figured the setup is disconnected anyway,
so, this is a good time.

The K3 is serial # 1209.

Looking at the hardware AGC mod instructions, I see that my radio does not
have an R101 to replace with an LED, but already HAS an LED at that
location.
The silkscreened reference designator (D40?) is for a diode.

R40 and R33 are already low-value ( a few ohms) resistance parts.

R41 and R42 are already 33k parts.

So... can I assume that this mod isn't necessary on my rig?

Steve KZ1X/4

K1, K2, K3, etc.
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[Don Wilhelm-4]

  Steve,

That certainly sounds like the Hardware AGC mod is already installed on
your K3.

73,
Don W3FPR

On 9/16/2010 9:14 PM, Steve Jackson wrote:

> I have my K3 on the bench, doing a series of updates and whatnot= ... since
> I just got and assembled the P3 I figured the setup is disconnected anyway,
> so, this is a good time.
>
> The K3 is serial # 1209.
>
> Looking at the hardware AGC mod instructions, I see that my radio does not
> have an R101 to replace with an LED, but already HAS an LED at that
> location.
> The silkscreened reference designator (D40?) is for a diode.
>
> R40 and R33 are already low-value ( a few ohms) resistance parts.
>
> R41 and R42 are already 33k parts.
>
> So... can I assume that this mod isn't necessary on my rig?
>
> Steve KZ1X/4
>

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[Bill W4ZV]

inventor_sixty_one wrote

The K3 is serial # 1209.

<Snip>

So... can I assume that this mod isn't necessary on my rig?

http://www.elecraft.com/K3/k3_app_notes.htm (next to last, at bottom of the page)

"Included on all new K3s

Approximately Jan 20, 2008

Approximately s/n 350"

73,  Bill