Re: [Drakelist] Drakelist Digest, Vol 64, Issue 5
- Original Message - From: Steve Wedge w1es1...@triad.rr.com To: Rich Jones michjone...@yahoo.com; Drake List drakelist@zerobeat.net Sent: Friday, October 11, 2013 4:31 PM Subject: Re: [Drakelist] Drakelist Digest, Vol 64, Issue 5 He replaced the tube. I just fixed a T-4XC that exhibited a cold or broken solder joint this month, in 2013. Joint was soldered in 1977. Not quite the old House, MD maxim of it never being Lupus. If swapping the tube brings no resolution, check all the connections. That means both tube socket and all solder joints. Still good maxims to live by. Steve Wedge, W1ES/4 I have found bad solder joints from the factory many times in all sorts of equipment. I've found joints where the wire was wrapped but never soldered in both Drake and General Radio equipment. Joints like that can run along for decades before they degrade enough to cause trouble. Its always worth poking at the wiring with an insulated stick when nothing else works. I usually use a wooden chop-stick. -- Richard Knoppow Los Angeles WB6KBL dickb...@ix.netcom.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drakelist Digest, Vol 64, Issue 5
You ever notice when trouble the R4A, it always says, its the tubeits the tube. I have one, and yes, it is always the tube. Get a new tube. 73 Rich K8UV On Friday, October 11, 2013 12:00 PM, drakelist-requ...@zerobeat.net drakelist-requ...@zerobeat.net wrote: Send Drakelist mailing list submissions to drakelist@zerobeat.net To subscribe or unsubscribe via the World Wide Web, visit http://mailman.zerobeat.net/mailman/listinfo/drakelist or, via email, send a message with subject or body 'help' to drakelist-requ...@zerobeat.net You can reach the person managing the list at drakelist-ow...@zerobeat.net When replying, please edit your Subject line so it is more specific than Re: Contents of Drakelist digest... Today's Topics: 1. R4A erratic audio output (k5eh) -- Message: 1 Date: Thu, 10 Oct 2013 16:36:06 -0500 From: k5eh k...@cox.net To: drakelist@zerobeat.net Subject: [Drakelist] R4A erratic audio output Message-ID: 52571dc6.8070...@cox.net Content-Type: text/plain; charset=ISO-8859-1; format=flowed R4a s/n 5404b has erratic, changing audio levels. 6EH5 (V7) gets very HOT! Pin voltages and resistance readings a little off ( IAW tube chart in alignment procedure). Can tap tube and change audio and signal levels. Changed tube with no improvement. Previous posts show very different voltage and resistance readings from those in my manual. I have the 11 tube version. Open to suggestions and comments. I refer to this GREAT site daily, and hope to be a constructive contributor in the future. 73, Jim, K5EH -- ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist End of Drakelist Digest, Vol 64, Issue 5 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drakelist Digest, Vol 64, Issue 5
He replaced the tube. I just fixed a T-4XC that exhibited a cold or broken solder joint this month, in 2013. Joint was soldered in 1977. Not quite the old House, MD maxim of it never being Lupus. If swapping the tube brings no resolution, check all the connections. That means both tube socket and all solder joints. Still good maxims to live by. Steve Wedge, W1ES/4 Time flies like an arrow; fruit flies like a banana. All my computers have my signature with various pearls of wisdom appended thereto. From: Rich Jones Sent: Friday, October 11, 2013 7:13 PM To: drakelist@zerobeat.net Subject: Re: [Drakelist] Drakelist Digest, Vol 64, Issue 5 You ever notice when trouble the R4A, it always says, its the tubeits the tube. I have one, and yes, it is always the tube. Get a new tube. 73 Rich K8UV On Friday, October 11, 2013 12:00 PM, drakelist-requ...@zerobeat.net drakelist-requ...@zerobeat.net wrote: Send Drakelist mailing list submissions to drakelist@zerobeat.net To subscribe or unsubscribe via the World Wide Web, visit http://mailman.zerobeat.net/mailman/listinfo/drakelist or, via email, send a message with subject or body 'help' to drakelist-requ...@zerobeat.net You can reach the person managing the list at drakelist-ow...@zerobeat.net When replying, please edit your Subject line so it is more specific than Re: Contents of Drakelist digest... Today's Topics: 1. R4A erratic audio output (k5eh) -- Message: 1 Date: Thu, 10 Oct 2013 16:36:06 -0500 From: k5eh k...@cox.net To: drakelist@zerobeat.net Subject: [Drakelist] R4A erratic audio output Message-ID: 52571dc6.8070...@cox.net Content-Type: text/plain; charset=ISO-8859-1; format=flowed R4a s/n 5404b has erratic, changing audio levels. 6EH5 (V7) gets very HOT! Pin voltages and resistance readings a little off ( IAW tube chart in alignment procedure). Can tap tube and change audio and signal levels. Changed tube with no improvement. Previous posts show very different voltage and resistance readings from those in my manual. I have the 11 tube version. Open to suggestions and comments. I refer to this GREAT site daily, and hope to be a constructive contributor in the future. 73, Jim, K5EH -- ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist End of Drakelist Digest, Vol 64, Issue 5 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
