[Kenwood] TS-830s IF Amp Alignment Question

[Clif Holland]

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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