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Newsgroups: rec.radio.amateur.misc

From: wa2ise
Subject: TS440 receiver audio mods file

Message-ID: <1993Mar24.130853.8959
Keywords:mods

Sender: news
Organization: AT&T

Date: Wed, 24 Mar 1993 13:08:53 GMT

Lines:29





copied from packet:

 Msg# TSF  Size #Rd  Date  Time From   MsgID        To

38513 BF   1520   0 19-Mar 2236 N2FAM  2890_WA2OLZ  MOD
 Sb:TS-440 RX Audio Mods





Here's some easy modifications to improve the rx audio fidelity of

Kenwood TS-440's.  All references below are to the IF board

component designations.



* Increase C60 to a .47uf or 1 uf.  This will increase low frequency

response on all modes.



* Decrease C51 to .01 uf.  This will increase high frequency response

on SSB/CW.



* Try removing R263 (tacked on the bottom of the board on my early

production unit).  This will lower in amplitude the audio coming

out of the detectors and improved the smoothness (a real technical

term) of the audio, especially on AM signals.



And, of course, I take no responsibilty for anything you do to

your radio.  Be careful.  The IF board on the 440' is about the easiest

one to get at.



73/Dave n2fam
========================================================================

Note:I haven't tried or verified this, proceed at your own risk. WA2ISE





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