Re: [AMRadio] T/R Switching
I used and old Avanti A/B switch and put a relay in it. See the pics.I still do not know how to do the T/R on the DX-60 so I do not use the mode switch, a big no-no.On 3.880 right now. --- On Thu, 5/13/10, [email protected] wrote: From: [email protected] Subject: Re: [AMRadio] T/R Switching To: [email protected] Date: Thursday, May 13, 2010, 5:48 PM Brian, Do tell us what you decided to do for your T/R switching! John KX5JT -Original Message- From: Brian Zwiener To: [email protected] Sent: Thu, May 13, 2010 5:31 pm Subject: [AMRadio] T/R Switching I would like to thank everyone for the quick, friendly, and informative responses. I am confident I will be good to go as soon as the crystals arrive, perhaps tomorrow. This was another fine example of the Ham Radio spirit.I hope to "see" you on AM very soon! 73Brian/KF5CCN __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] T/R Switching
Brian, Do tell us what you decided to do for your T/R switching! John KX5JT -Original Message- From: Brian Zwiener To: [email protected] Sent: Thu, May 13, 2010 5:31 pm Subject: [AMRadio] T/R Switching I would like to thank everyone for the quick, friendly, and informative responses. I am confident I will be good to go as soon as the crystals arrive, perhaps tomorrow. This was another fine example of the Ham Radio spirit.I hope to "see" you on AM very soon! 73Brian/KF5CCN __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] T/R Switching
In addition to Bob's system, I usually use a DPDT relay for the antenna relay. The second set of contacts I use to ground the receiver antenna input during transmit. Probably not an issue at low power like for the DX-60 but found to be a good safety at higher power. 73, Mitch K9PNP > Date: Wed, 12 May 2010 17:09:02 + > From: [email protected] > To: [email protected]; [email protected] > Subject: Re: [AMRadio] T/R Switching > > Hi Brian, > > There are several options. I use an old Dow-Key relay with my DX-60. It's > powered from the accessory socket on the back of the DX-60 (117 volts, as I > recall), and is energized when you rotate the function switch to AM or CW. > > Also, if you can't find a Dow-Key at a reasonable price you can build your > own relay box. I used two 117V relays from Radio Shack. The first relay > controls the antenna switching, and the other "unmutes" my receiver. The box > also has three female coax connectors just like the Dow-Key relay (one > connects to DX-60, one to your receiver, and one to your antenna). Check you > receiver's schematic to find out what's required to "unmute" your receiver. > If you leave the Receive/Standby switch in "Standby", your receiver's muting > and unmuting can be controlled by the second relay. Your receiver's accessory > socket should have pin-outs for that relay. In some receivers it's just a > matter of completing a ground connection to "unmute' your receiver. Be > careful, though...other receivers may require you to switch B+ voltage. > > In my set-up I use the Dow-Key to control my vintage CW station, and the > home-brew box to control the two AM stations. > > Hope this helps! > > 73, > Bob > K6GCN > > - Original Message - > From: "Brian Zwiener" > To: [email protected] > Sent: Tuesday, May 11, 2010 2:45:31 PM GMT -08:00 US/Canada Pacific > Subject: [AMRadio] T/R Switching > > I have Purchased a gem of a Heathkit DX-60 AM Transmitter.I was wondering if > someone had a better idea that what I have for T/R switching. I need to use > the same antenna with separate transmitter and receiver, and not have the > transmitter power get in the receiver front end. If someone has an idea, > schematic, or link I would appreciate it very much. I want to get this on the > air soon and have fun. > > 73 Brian [email protected] KF5CCN.COM NEW Ham Radio News Group > Life is much too short for QRP! > __ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/[email protected]/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: [email protected] > To unsubscribe, send an email to [email protected] with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/[email protected]/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: [email protected] > To unsubscribe, send an email to [email protected] with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html _ The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multicalendar&ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_5 __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] T/R Switching
Hi Brian, There are several options. I use an old Dow-Key relay with my DX-60. It's powered from the accessory socket on the back of the DX-60 (117 volts, as I recall), and is energized when you rotate the function switch to AM or CW. Also, if you can't find a Dow-Key at a reasonable price you can build your own relay box. I used two 117V relays from Radio Shack. The first relay controls the antenna switching, and the other "unmutes" my receiver. The box also has three female coax connectors just like the Dow-Key relay (one connects to DX-60, one to your receiver, and one to your antenna). Check you receiver's schematic to find out what's required to "unmute" your receiver. If you leave the Receive/Standby switch in "Standby", your receiver's muting and unmuting can be controlled by the second relay. Your receiver's accessory socket should have pin-outs for that relay. In some receivers it's just a matter of completing a ground connection to "unmute' your receiver. Be careful, though...other receivers may require you to switch B+ voltage. In my set-up I use the Dow-Key to control my vintage CW station, and the home-brew box to control the two AM stations. Hope this helps! 73, Bob K6GCN - Original Message - From: "Brian Zwiener" To: [email protected] Sent: Tuesday, May 11, 2010 2:45:31 PM GMT -08:00 US/Canada Pacific Subject: [AMRadio] T/R Switching I have Purchased a gem of a Heathkit DX-60 AM Transmitter.I was wondering if someone had a better idea that what I have for T/R switching. I need to use the same antenna with separate transmitter and receiver, and not have the transmitter power get in the receiver front end. If someone has an idea, schematic, or link I would appreciate it very much. I want to get this on the air soon and have fun. 73 Brian [email protected] KF5CCN.COM NEW Ham Radio News Group Life is much too short for QRP! __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] T/R switching
David, do you still have the Dow Key relay? 73, John, K5PGW --- DAVID O'NEILL <[EMAIL PROTECTED]> wrote: > >I HAVE A NICE DOWKEY FOR 4O BUCKS > > > > > > > > > Hi Guys, > > I am looking for a dow key relay or some other > type of coaxial relay to > > be used for T/R switching. If any of you have one > laying around that you > > don't need I would be happy to buy it. Or, maybe > some one has a clever > > homebrew way of t/r switching a boatanchor > receiver and transmitter to > > the same antenna. I think I read somewhere about > using open frame relays > > or something. > > > > Thanks in advance, > > > > Bob K6GGO > > > __ > > AMRadio mailing list > > List Home: > http://mailman.qth.net/mailman/listinfo/amradio > > Partner Website: http://www.amfone.net > > Help: http://mailman.qth.net/mmfaq.html > > Post: mailto:[email protected] > > > > > > - > Join ISP.COM today - $8.95 internet , less than 1/2 > the cost of AOL > Try us out, http://www.isp.com/ > > __ > AMRadio mailing list > List Home: > http://mailman.qth.net/mailman/listinfo/amradio > Partner Website: http://www.amfone.net > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > Have a burning question? Go to www.Answers.yahoo.com and get answers from real people who know. __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected]
Re: [AMRadio] T/R switching
>I HAVE A NICE DOWKEY FOR 4O BUCKS Hi Guys, > I am looking for a dow key relay or some other type of coaxial relay to > be used for T/R switching. If any of you have one laying around that you > don't need I would be happy to buy it. Or, maybe some one has a clever > homebrew way of t/r switching a boatanchor receiver and transmitter to > the same antenna. I think I read somewhere about using open frame relays > or something. > > Thanks in advance, > > Bob K6GGO > __ > AMRadio mailing list > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Partner Website: http://www.amfone.net > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > - Join ISP.COM today - $8.95 internet , less than 1/2 the cost of AOL Try us out, http://www.isp.com/ __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected]
