[Elecraft] K3 AF Upgrade Kit (for speaker amplifier and LINE OUTs)

[hb9wi]

Speaker amplifier modification:
In the AF stage upgrade instruction page 1 it is mentioned:
“This mod changes RFC 47, 100 µH radio frequency choke that supplies power
to the K3 audio amplifier. The 
original choke has a resistance of about 1.5 ohms. This resistance is high
enough to cause some clipping of the audio signal at moderate volume
settings, resulting in distortion products about 40 dB down. Replacing this
choke with a physically larger unit with a resistance of about 0.2 ohms
results in a 20 to 30 dB reduction in most distortion products”

On the K3 circuit diagram RFC47 is marked with a value of 10uH. 
I plan to buy this choke locally “because the high shipping charges for the
kit to Switzerland”. Which value is now correct 10uH or 100uH?

73 Willy HB9WI

-- 
View this message in context: http://n2.nabble.com/K3-AF-Upgrade-Kit-%28for-speaker-amplifier-and-LINE-OUTs%29-tp1495036p1558365.html
Sent from the Elecraft mailing list archive at Nabble.com.