[Kenwood] TS-830s IF Amp Alignment Question

Thu Jul 31 12:00:36 EDT 2008

Page 37 of the TS-120 Service Manual has the level conversion chart. It's 
also in other Kenwood service manuals but not in the 830. I don't know why
Japanese "SG" American "SG" My Notes
-6db .25uv
0db .5uv -113dBm
6db 1uv
12db 2uv
24db 8uv
30db 15.8uv
40db 50uv -73dBm
I have the entire chart but that's the basics.
The newer radios use -110, -107, -81, & -23 dBM to align the s-meters
Clif Holland KA5IPF
www.avvid.com
----- Original Message ----- 
From: "Pancake, John W CTR USAF 721 MSG/CEO-PWT" 
<John.Pancake.ctr at cheyennemountain.af.mil>
To: <kenwood at mailman.qth.net>
Sent: Thursday, July 31, 2008 8:28 AM
Subject: [Kenwood] TS-830s IF Amp Alignment Question
Good Morning -
I'd like to ask the groups help with an alignment question relating to
my TS-830s.
Service manual (third edition), page 36, step 15, "IF Amp Adjustment".
Calls for applying a 1.9MHz, 40dB signal from an RF signal generator and
gradually decreasing the generator output to -6dB during adjustment.
My question: a 40dB signal decreasing to -6dB translates to what actual
VOLTAGES?
My signal generator output is adjustable from 0. 1 microvolt to 3 volts
(into 50 ohm load).
(I don't understand how to convert dB to microvolts).
Tnx, Bill, w0ng
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