I installed this last night in K3#51. I'm running uC 2.67, which
features the AGC-OFF hearing protection.
I'm trying to decide what LINE OUT and AGC setting to use for digital
modes with.
If AGC is disabled, line out values 0, 1, 2, 3, and 4 produce strong
differences. After that I see
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
is the 100
uH choke.
http://www.bourns.com/pdfs/5800_series.pdf
Paul, W9AC
- Original Message -
From: hb9wi [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Thursday, November 20, 2008 1:51 PM
Subject: Re: [Elecraft] K3 AF Upgrade Kit (for speaker amplifier and LINE
OUTs
This information and a mod manual are now on our K3 Enhancements and
Applications note page. See:
http://www.elecraft.com/K3/k3_app_notes.htm
I apologize for the delay getting this posted! It should have been up
earlier.
From that page:
Line-Out KIO3 R19/R20 Change:
About Oct 7, 2008
About
Hi,
I am a little confused as to exactly what is affected by the choke mod (the
document only mentions speakers):
Internal speaker?
External speakers?
Front panel headphones?
Rear panel headphones?
I am asking because I use headphones 99% of the time (currently front
connected, but I am
I am a little confused as to exactly what is affected by the choke mod (the
document only mentions speakers):
The document is accurate.
It means the speaker amplifier, which is used to drive the internal
speaker and the external speaker jack. Not the headphones or LINE OUT,
just the
Wayne
Can you tell us the serial number at which
these changes were incorporated?
We need to know who needs to order them
and who does not.
Thanks and 73
Bob N6WG
- Original Message -
From: wayne burdick [EMAIL PROTECTED]
To: Elecraft Reflector elecraft@mailman.qth.net
Sent: Thursday,
I would also like to know that please.
73, Igor UA9CDC
Wayne
Can you tell us the serial number at which
these changes were incorporated?
We need to know who needs to order them
and who does not.
Thanks and 73
Bob N6WG
- Original Message -
From: wayne burdick [EMAIL PROTECTED]
To:
wayne burdick wrote:
SPEAKER AMP: The mod kit includes a very low-resistance RF choke for
use at RFC47
73,
Wayne
N6KR
What is the value? / SM2EKM
Could this be homebrewed? Core, turns, wire? / LZ1VB
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Post to:
wayne burdick wrote:
SPEAKER AMP: The mod kit includes a very low-resistance RF choke for
use at RFC47
73,
Wayne
N6KR
What is the value? / SM2EKM
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