K3 mods

[Steven.Zabarnick]

Yesterday I overcame my fears :-) and successfully performed the  
following mods on my K3 (S/N 1672):

K3 AF Mod (Line out & speaker)
IF Output Buffer Gain Mod
K3 Extreme Signal RX Protection Mod

But, I was not able to perform the K3 AF Output Mod (two 470 ohm  
resistors on the KIO3 board). I found it impossible to hold the  
resistor in place will soldering to the connector pins. Does anyone  
have any suggestions on techniques for installing these resistors?

Steve N9SZ

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[Julian, G4ILO]

Steven.Zabarnick wrote

I was not able to perform the K3 AF Output Mod (two 470 ohm  
resistors on the KIO3 board).

I thought they were two 51 ohm resistors (according to the instruction sheet I have here.) Has there been a mod to the mod?

[Steven.Zabarnick]

Confusingly, there are actually two mods for the K3 with similar names:

The "K3 AF Mod Kit Rev B" which is called the "K3 AF Stage Upgrade" in its
instructions. This one is for the line out and speaker signal pathways, and
involves changing an RF choke and two 51 ohm resistors.

The other mod is the "K3 AF Output Mod Kit, Rev C" and is called the "K3 AF
Amplifier Out Modification" in its instructions. This protects the amps in
case of a short circuit or low impedance load and involves adding two 470
ohm resistors.

Steve N9SZ

Julian G4ILO wrote:

>Steven.Zabarnick wrote:
>>
>> I was not able to perform the K3 AF Output Mod (two 470 ohm
>> resistors on the KIO3 board).
>>
>I thought they were two 51 ohm resistors (according to the instruction
>sheet
>I have here.) Has there been a mod to the mod?


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