Newsgroups:rec.radio.amateur.misc From:wa2ise@cbnewsb.cb.att.com (robert.f.casey) Subject:TS440 receiver audio mods file Message-ID:<1993Mar24.130853.8959@cbfsb.cb.att.com> Keywords:mods Sender:news@cbfsb.cb.att.com 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@USBBS () 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@ka3fmo.pa ======================================================================== Note:I haven't tried or verified this, proceed at your own risk. WA2ISE  Amsterdam View Our Stats   CLICK FOR A FREE DOMAIN NAMES HTTP://WWW.YOURNAME.TK FOR YOUR OWN WEBSITE IF YOU CLICK HERE AND YOU CAN VOTE FOR OUR FREE WEBSITES IN THE TOP 100 LIST  WANT A TOP RANKING ? USE THE ULTIMATE SOFTWARE SUITE FOR WEB SITE PROMOTION  FreeWebSubmissions Submit Your Site To The Web's Top 50 Search Engines For Free THE ALEXA BANNER, THIS BANNER GIVES THE DALLY STATISTICS OF THIS FREE WEB SITE The World of Free Packet Radio Software Amsterdam The World Of Free Packet Radio Software Amsterdam The Netherlands |