[drakelist] Deaf TR4
Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- I turned on my TR4 this morning to find it deaf. I tried tuning up and found the plate meter would peg on tx even with the power turned all the way down. What's more, I have to give the old girl a thump to get her to unkey now. I know - TX/RX relay How do I remove it and test it? Where can I get a replacement? Is it the relay or am I guessing wrong? Ken 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17ip _ Climb to the top of the charts! Play Star Shuffle: the word scramble challenge with star power. http://club.live.com/star_shuffle.aspx?icid=starshuffle_wlmailtextlink_oct -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] Deaf TR4
Mike Bryce [EMAIL PROTECTED] made an utterance to the drakelist gang -- check your bias supply!! Mike, WB8VGE SunLight Energy Systems The Heathkit Shop http://www.theheathkitshop.com/ J e e p o|||o Note: No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced On Nov 12, 2007, at 12:41 PM, Ken Bessler wrote: Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- I turned on my TR4 this morning to find it deaf. I tried tuning up and found the plate meter would peg on tx even with the power turned all the way down. What's more, I have to give the old girl a thump to get her to unkey now. I know - TX/RX relay How do I remove it and test it? Where can I get a replacement? Is it the relay or am I guessing wrong? Ken 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17ip _ Climb to the top of the charts! Play Star Shuffle: the word scramble challenge with star power. http://club.live.com/star_shuffle.aspx? icid=starshuffle_wlmailtextlink_oct -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net -- -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] Deaf TR4
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- Ken - More likely a Bias supply failure. Probably a shorted electrolytic capacitor in the AC-4. The Bias supply should read approximately -65 VDC at the transceiver. Most all the AC-4 power supply filter caps are years past their life expectancy and are just waiting for the most inopportune time to die! The AC-4R board/kit from Mike Bryce at the Heathkitshop is the ideal way to deal with the problem, and set your supply to work for the next 30 years. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B C-Line Service Supplement CDs www.k4oah.com Ken Bessler wrote: Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- I turned on my TR4 this morning to find it deaf. I tried tuning up and found the plate meter would peg on tx even with the power turned all the way down. What's more, I have to give the old girl a thump to get her to unkey now. I know - TX/RX relay How do I remove it and test it? Where can I get a replacement? Is it the relay or am I guessing wrong? Ken -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
RE: [drakelist] Deaf TR4
Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- From: [EMAIL PROTECTED] Subject: Re: [drakelist] Deaf TR4 Date: Mon, 12 Nov 2007 13:05:52 -0500 To: [EMAIL PROTECTED] Mike Bryce made an utterance to the drakelist gang -- check your bias supply!! Mike, WB8VGE Checked according to the manual - The best I could do was get 300ma plate current. I also touched an antenna lead to the contacts on the RCVR/TXVR switch and got a rx signal there. 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17ip _ Help yourself to FREE treats served up daily at the Messenger Café. Stop by today. http://www.cafemessenger.com/info/info_sweetstuff2.html?ocid=TXT_TAGLM_OctWLtagline -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
RE: [drakelist] Deaf TR4
Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- Date: Mon, 12 Nov 2007 13:39:48 -0500 From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Re: [drakelist] Deaf TR4 Garey Barrell made an utterance to the drakelist gang -- Ken - More likely a Bias supply failure. Probably a shorted electrolytic capacitor in the AC-4. The Bias supply should read approximately -65 VDC at the transceiver. Most all the AC-4 power supply filter caps are years past their life expectancy and are just waiting for the most inopportune time to die! The AC-4R board/kit from Mike Bryce at the Heathkitshop is the ideal way to deal with the problem, and set your supply to work for the next 30 years. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B C-Line Service Supplement CDs I measure -26.63Vdc at pin 9 Ken 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17ip _ Boo! Scare away worms, viruses and so much more! Try Windows Live OneCare! http://onecare.live.com/standard/en-us/purchase/trial.aspx?s_cid=wl_hotmailnews -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] Deaf TR4
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- The TR relay is pulled in, because the bias VOLTAGE is too low. This is also why the idle current cannot be set to 0.1A. The unit is in transmit! You will destroy your final tubes shortly. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B C-Line Service Supplement CDs www.k4oah.com Ken Bessler wrote: Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- From: [EMAIL PROTECTED] Subject: Re: [drakelist] Deaf TR4 Date: Mon, 12 Nov 2007 13:05:52 -0500 To: [EMAIL PROTECTED] Mike Bryce made an utterance to the drakelist gang -- check your bias supply!! Mike, WB8VGE Checked according to the manual - The best I could do was get 300ma plate current. I also touched an antenna lead to the contacts on the RCVR/TXVR switch and got a rx signal there. 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17ip -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] Deaf TR4
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- Bias supply failure! Should be adjustable from about -45 to -85 VDC. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B C-Line Service Supplement CDs www.k4oah.com Ken Bessler wrote: Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- Date: Mon, 12 Nov 2007 13:39:48 -0500 From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Re: [drakelist] Deaf TR4 Garey Barrell made an utterance to the drakelist gang -- Ken - More likely a Bias supply failure. Probably a shorted electrolytic capacitor in the AC-4. The Bias supply should read approximately -65 VDC at the transceiver. Most all the AC-4 power supply filter caps are years past their life expectancy and are just waiting for the most inopportune time to die! The AC-4R board/kit from Mike Bryce at the Heathkitshop is the ideal way to deal with the problem, and set your supply to work for the next 30 years. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B C-Line Service Supplement CDs I measure -26.63Vdc at pin 9 Ken 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17ip -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] Deaf TR4
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- Ken - Hopefully you have turned off the Transceiver!! Here is an article on the AC-4 power supply that should help you repair it. http://tinyurl.com/fd5o5* This will help you identify the problem component(s). You can probably effect a quick repair by replacing C5a and C5B. Twist-lok caps are just about extinct now, but you can install tubular caps under the chassis, but be sure to disconnect all wiring from the C5 terminals. You may also have to replace D7, a 1N4007 will replace it. For long term, I would highly recommend doing the AC-4R upgrade as described here: *http://tinyurl.com/344dr6 Let us know if you need more help. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B C-Line Service Supplement CDs www.k4oah.com Ken Bessler wrote: Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- I measure -26.63Vdc at pin 9 Ken 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17ip -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
RE: [drakelist] Deaf TR4
Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- Garey - I have access to 22mfd 160v - will that work to replace C5ab? Ken KG0WX _ Boo! Scare away worms, viruses and so much more! Try Windows Live OneCare! http://onecare.live.com/standard/en-us/purchase/trial.aspx?s_cid=wl_hotmailnews -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] Deaf TR4
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- Ken - Also be careful to watch polarity on the new caps. The circuit is not only upside down, being a negative supply, it's also arranged a little differently. Garey Ken Bessler wrote: Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- Garey - I have access to 22mfd 160v - will that work to replace C5ab? Ken KG0WX -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] Deaf TR4
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- Ken - I just noticed that the second link I sent you re the AC-4R was blown somehow. This one should work. * *http://tinyurl.com/yt6777* *Garey - K4OAH Ken Bessler wrote: Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- Garey - I have access to 22mfd 160v - will that work to replace C5ab? Ken KG0WX -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
RE: [drakelist] Deaf TR4
Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- Date: Mon, 12 Nov 2007 15:06:43 -0500 From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Re: [drakelist] Deaf TR4 Garey Barrell made an utterance to the drakelist gang -- Ken - Also be careful to watch polarity on the new caps. The circuit is not only upside down, being a negative supply, it's also arranged a little differently. Garey OK, I'm back from the parts store. I was suprised at the size of the replacement caps! About the size of a BNC connector. Now, if I'm reading the schematic right, the + lead of the new C5a should go to the junction between D7 and R7. Right? P.S. of course I forgot the diodes but I had one in my junk box so I'll be fine. What resistance should I see across a 4007? 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17ip _ Peek-a-boo FREE Tricks Treats for You! http://www.reallivemoms.com?ocid=TXT_TAGHMloc=us -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] Deaf TR4
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- Ken - OK. Yes, the + terminal goes to the junction of D7 and R7. Capacitor technology has really progressed in the last 40 years!! :-) If your DMM has a Diode Test function, usually identified on the Range switch with a diode symbol (-|-), a good diode will read about 0.600 - 0.650 in one direction, and if you reverse the leads it should then read Open or whatever it reads on the Ohmmeter range with the leads not touching each other. Garey Ken Bessler wrote: Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- OK, I'm back from the parts store. I was suprised at the size of the replacement caps! About the size of a BNC connector. Now, if I'm reading the schematic right, the + lead of the new C5a should go to the junction between D7 and R7. Right? P.S. of course I forgot the diodes but I had one in my junk box so I'll be fine. What resistance should I see across a 4007? 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17ip -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
RE: [drakelist] Deaf TR4 - FIXED
Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- Date: Mon, 12 Nov 2007 19:44:13 -0500 From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Re: [drakelist] Deaf TR4 Garey Barrell made an utterance to the drakelist gang -- Ken - OK. Yes, the + terminal goes to the junction of D7 and R7. Capacitor technology has really progressed in the last 40 years!! :-) If your DMM has a Diode Test function, usually identified on the Range switch with a diode symbol (-|-), a good diode will read about 0.600 - 0.650 in one direction, and if you reverse the leads it should then read Open or whatever it reads on the Ohmmeter range with the leads not touching each other. Garey Well, I replaced C5a/b and C11 (it had had the upper 20% of itself blown off). I tested D7 out of circuit and it checked out OK so I re- attached it and started testing. -62.53v on the bias now and the radio is operating normally. I did a MDS test on 80/40 20m and the reciever checked out fine. Could I be imagining things or are my backlights bluer now? The S meter really looks a lot less green and more blue now. My guess is the power supply is putting out more voltage now and the lightbulbs are glowing whiter than before. I also noticed that it takes far less drive to get full power than before. As a matter of fact, the upper/lower indiccators look brighter than before Maybe the old C5a/b was pulling down the power supply? Anyways, TR4 #29191 is a happy camper again and her owner is happy, too. To the users of this list: THANK YOU!!! Especially K4OAH Garey - you da man! Ken 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17ip _ Climb to the top of the charts! Play Star Shuffle: the word scramble challenge with star power. http://club.live.com/star_shuffle.aspx?icid=starshuffle_wlmailtextlink_oct -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] Deaf TR4
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- Ken - OK. Yes, the + terminal goes to the junction of D7 and R7. Capacitor technology has really progressed in the last 40 years!! :-) If your DMM has a Diode Test function, usually identified on the Range switch with a diode symbol (-|-), a good diode will read about 0.600 - 0.650 in one direction, and if you reverse the leads it should then read Open or whatever it reads on the Ohmmeter range with the leads not touching each other. Garey Ken Bessler wrote: Ken Bessler [EMAIL PROTECTED] made an utterance to the drakelist gang -- OK, I'm back from the parts store. I was suprised at the size of the replacement caps! About the size of a BNC connector. Now, if I'm reading the schematic right, the + lead of the new C5a should go to the junction between D7 and R7. Right? P.S. of course I forgot the diodes but I had one in my junk box so I'll be fine. What resistance should I see across a 4007? 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17ip -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
