---------------------------------------------------------- Avionics-List Digest Archive --- Total Messages Posted Mon 02/02/09: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:08 PM - KX170/A/B schematics? (Jay Maynard) 2. 05:54 PM - Re: KX170/A/B schematics? (Ron Quillin) 3. 06:39 PM - Re: KX170/A/B schematics? (Noel Loveys) 4. 07:59 PM - Re: KX170/A/B schematics? (Jay Maynard) ________________________________ Message 1 _____________________________________ Time: 05:08:53 PM PST US From: Jay Maynard Subject: Avionics-List: KX170/A/B schematics? I've got one of each of the King KX170, KX170A, and KX170B, and I'm trying to get one going as a hangar monitor radio. (I'm not even gonna hook up a mic.) I'd like to have the NAV radio play out the same speaker as the COM radio, so I can turn it on (or up, in the case of the KX170) and listen to the AWOS on the on-field VOR. In my playing, I've discovered that the NAV radio audio does play out the speaker output, but at a low volume. I'd like to make it the same as the COM radio. Ideally, I'd also like to lay hands on a schematic for the radio for something less than the $100+ a service manual goes for online. Suggestions? -- Jay Maynard, K5ZC, PP-ASEL, AGI http://www.conmicro.com http://jmaynard.livejournal.com http://www.tronguy.net Fairmont, MN (KFRM) (Yes, that's me!) AMD Zodiac CH601XLi N55ZC http://www.tronguy.net/N55ZC.shtml ________________________________ Message 2 _____________________________________ Time: 05:54:08 PM PST US From: "Ron Quillin Subject: Re: Avionics-List: KX170/A/B schematics? Lacking some other offer, I've found that avionicstec or contact him directly at avionicstec at hotmail dot com on eBay has some nice manuals on CD at reasonable prices. At 17:00 2/2/2009, you wrote: > >I've got one of each of the King KX170, KX170A, and KX170B, and I'm trying >to get one going as a hangar monitor radio. (I'm not even gonna hook up a >mic.) I'd like to have the NAV radio play out the same speaker as the COM >radio, so I can turn it on (or up, in the case of the KX170) and listen to >the AWOS on the on-field VOR. > >In my playing, I've discovered that the NAV radio audio does play out the >speaker output, but at a low volume. I'd like to make it the same as the COM >radio. Ideally, I'd also like to lay hands on a schematic for the radio for >something less than the $100+ a service manual goes for online. > >Suggestions? >-- >Jay Maynard, K5ZC, PP-ASEL, AGI http://www.conmicro.com >http://jmaynard.livejournal.com http://www.tronguy.net >Fairmont, MN (KFRM) (Yes, that's me!) >AMD Zodiac CH601XLi N55ZC http://www.tronguy.net/N55ZC.shtml > ________________________________ Message 3 _____________________________________ Time: 06:39:53 PM PST US From: "Noel Loveys" Subject: RE: Avionics-List: KX170/A/B schematics? I=92m just thinking out loud here but the reason your Nav beacons and identifiers may be low is they are supposed to have separate antennae. I assume you did have both com and Nav antennae connected when you tested and not the com antenna alone. Noel From: owner-avionics-list-server@matronics.com [mailto:owner-avionics-list-server@matronics.com] On Behalf Of Ron Quillin or contact him directly at avionicstec at hotmail dot com on eBay has some nice manuals on CD at reasonable prices. At 17:00 2/2/2009, you wrote: I've got one of each of the King KX170, KX170A, and KX170B, and I'm trying to get one going as a hangar monitor radio. (I'm not even gonna hook up a mic.) I'd like to have the NAV radio play out the same speaker as the COM radio, so I can turn it on (or up, in the case of the KX170) and listen to the AWOS on the on-field VOR. In my playing, I've discovered that the NAV radio audio does play out the speaker output, but at a low volume. I'd like to make it the same as the COM radio. Ideally, I'd also like to lay hands on a schematic for the radio for something less than the $100+ a service manual goes for online. Suggestions? -- Jay Maynard, K5ZC, PP-ASEL, AGI http://www.conmicro.com http://jmaynard.livejournal.com http://www.tronguy.net Fairmont, MN (KFRM) (Yes, that's me!) AMD Zodiac CH601XLi N55ZC http://www.tronguy.net/N55ZC.shtml Avionics-List Email Forum - http://www.matronics.com/Navigator?Avionics-List ; - MATRONICS WEB FORUMS - http://forums.matronics.com ; - List Contribution Web Site - ; -Matt Dralle, List Admin. http://www.matronics.com/contribution =========== ________________________________ Message 4 _____________________________________ Time: 07:59:54 PM PST US From: Jay Maynard Subject: Re: Avionics-List: KX170/A/B schematics? On Mon, Feb 02, 2009 at 11:05:43PM -0330, Noel Loveys wrote: > I?m just thinking out loud here but the reason your Nav beacons and > identifiers may be low is they are supposed to have separate antennae. I > assume you did have both com and Nav antennae connected when you tested and > not the com antenna alone. I have the radios on the bench hooked up to a service monitor (a Marconi 2966). The service monitor was connected to the NAV antenna input for that test. I got the same result on both the KX170 and KX170A, which is what made me think it was a design issue. I'm going to let the KX170A run overnight; I don't know how long the radios have sat, so I'll let the capacitors re-form. When I first hooked it up, it took about 7 microvolts to break the squelch; it improved to 3.4 microvolts after running for 20 minutes or so. That's pretty anemic, but I'm not that worried, since I mainly want to listen to the local traffic on CTAF. -- Jay Maynard, K5ZC, PP-ASEL, AGI http://www.conmicro.com http://jmaynard.livejournal.com http://www.tronguy.net Fairmont, MN (KFRM) (Yes, that's me!) AMD Zodiac CH601XLi N55ZC http://www.tronguy.net/N55ZC.shtml ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message avionics-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Avionics-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/avionics-list Browse Digests http://www.matronics.com/digest/avionics-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.