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
SOURCE: The QRZ Windows Ham Radio CDROM |
