[Kenwood] re: ts940s watt meter and Ic amps

Fri, 6 Feb 2004 09:06:47 -0600

On the control unit;
IC zero adjust VR10
IC adjust VR7
Power meter adjust VR17

Typically at 110w out the current is about 8A.

IC adjust is set to match the current drawn by the final unit measured by an
ammeter in the power lead to the final.

Clif Holland, KA5IPF
AVVid
Authorized Kenwood and Icom Service Center
816 W Shady Grove Rd
Irving, TX 75060

www.avvid.com

1-800-214-5779
972-870-0630 (Local)
----- Original Message ----- 
From: <[email protected]>
To: <[email protected]>
Sent: Thursday, February 05, 2004 2:54 PM
Subject: [Kenwood] re: ts940s watt meter and Ic amps

> i aqquired a well used ts940s awhile ago for a very good price. free.
> measured power on a good watt meter shows 105 watts out but the meter on
the
> rig shows about 65. is a calibrating pot in the rig, if so where and what
is
> the part number? also, measuring voltage drop across the meter shunt for
Ic
> current, r 9 on ps board shows 116 mv. the resistor is marked 15m, so i
> assume it is a 15 milliohm value. that figures out to about 7.8 amps which
> at 29 v comes to about 220 watts input. book says max is 250w pep. but the
> ammeter on the radio shows about 15 amps. again is a trim pot for that
> circuit? also, what is max current allowed on the pa? pa voltage is fused
at
> 15a.
>
> thanks, ed
> n4ek
>
>
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