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spsquires
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Post subject: Tradio radio Posted: Feb Fri 09, 2018 8:56 pm |
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Joined: Mar Fri 07, 2014 10:20 am Posts: 2745 Location: A0E 1K0 NL Canada
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I have a tradio model t-u6 radio and need help with electrolytics, Thanks from a0e 1k0 nl Canada.
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spsquires
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Post subject: Re: Tradio radio Posted: Feb Fri 09, 2018 8:57 pm |
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Joined: Mar Fri 07, 2014 10:20 am Posts: 2745 Location: A0E 1K0 NL Canada
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Here should be a link to schematic , sorry it will not work.
Last edited by spsquires on Feb Fri 09, 2018 9:20 pm, edited 4 times in total.
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spsquires
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Post subject: Re: Tradio radio Posted: Feb Fri 09, 2018 8:59 pm |
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Joined: Mar Fri 07, 2014 10:20 am Posts: 2745 Location: A0E 1K0 NL Canada
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My question is am I correct to say A-30mfd , B-40mfd , C-20mfd .
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spsquires
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Post subject: Re: Tradio radio Posted: Feb Fri 09, 2018 9:03 pm |
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Joined: Mar Fri 07, 2014 10:20 am Posts: 2745 Location: A0E 1K0 NL Canada
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Also am I correct to say A has r-15 connected to it and c has r-16 connected to it and both r-15 and r-16 connect to B.
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spsquires
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Post subject: Re: Tradio radio Posted: Feb Fri 09, 2018 9:03 pm |
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Joined: Mar Fri 07, 2014 10:20 am Posts: 2745 Location: A0E 1K0 NL Canada
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Also am I correct to say A has r-15 connected to it and c has r-16 connected to it and both r-15 and r-16 connect to B.
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Norm Leal
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Post subject: Re: Tradio radio Posted: Feb Fri 09, 2018 9:25 pm |
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Joined: Jan Thu 01, 1970 1:00 am Posts: 37195 Location: Livermore, CA
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easyrider8
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Post subject: Re: Tradio radio Posted: Feb Fri 09, 2018 9:30 pm |
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Joined: Jan Thu 01, 1970 1:00 am Posts: 12279 Location: Mpls, Minnesota
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spsquires
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Post subject: Re: Tradio radio Posted: Feb Fri 09, 2018 9:51 pm |
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Joined: Mar Fri 07, 2014 10:20 am Posts: 2745 Location: A0E 1K0 NL Canada
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Thanks for the info and am I right about the resistors and where they attach.
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spsquires
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Post subject: Re: Tradio radio Posted: Feb Fri 09, 2018 10:13 pm |
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Joined: Mar Fri 07, 2014 10:20 am Posts: 2745 Location: A0E 1K0 NL Canada
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I have the electrolytics done the way I think they go but the radio has a buzzing sound and r-15 and r-16 are getting hot.
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easyrider8
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Post subject: Re: Tradio radio Posted: Feb Fri 09, 2018 11:01 pm |
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Joined: Jan Thu 01, 1970 1:00 am Posts: 12279 Location: Mpls, Minnesota
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The positive ends of the electrolytics go towards the resistors, the negative ends are all connected together and go to B- /filament/on-off switch.
If the electrolytics were installed backwards throw them away and start over.
Dave
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spsquires
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Post subject: Re: Tradio radio Posted: Feb Fri 09, 2018 11:31 pm |
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Joined: Mar Fri 07, 2014 10:20 am Posts: 2745 Location: A0E 1K0 NL Canada
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I shorted out tube 35l6 somewhere along the way and now have radio playing poorly but have to change wax caps now.
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Marcc
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Post subject: Re: Tradio radio Posted: Feb Fri 09, 2018 11:42 pm |
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Joined: Feb Sun 01, 2009 2:56 pm Posts: 10111 Location: Victoria, Australia
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Why do you power a radio with parts like Wax paper caps still in situ? There are several things to be done before applying power.
Powering is never step one. Such actions can render a set economically un-repairable due to the damage and as I am at the repair end I see, and have to repair (can't sometimes) a lot of damage caused by exuberance & an obsession with "powering to see if it works". If it has been sitting for eons it probably won't, as it was put there in the first place, because it didn't.
Marc
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spsquires
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Post subject: Re: Tradio radio Posted: Feb Sat 10, 2018 12:08 am |
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Joined: Mar Fri 07, 2014 10:20 am Posts: 2745 Location: A0E 1K0 NL Canada
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My reason for doing this is I have to take one cap at a time and replace because my knowledge of schematic reading , it is better in my opinion to do them one at a time.
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Marcc
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Post subject: Re: Tradio radio Posted: Feb Sat 10, 2018 12:56 am |
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Joined: Feb Sun 01, 2009 2:56 pm Posts: 10111 Location: Victoria, Australia
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I replace them one at a time & check resistors as I go (after assessing that its worthwhile, & transformers & wiring are sound etc). The only need for power is if the transformer needs attention & its normally isolated to do that. One does not power until they are confident that everything dodgy has been dealt with and won't cause problems when powered. Potentiometers are often the first thing that prove faulty on start up.
The right procedures will see the set fire up 95+% of the time without any major issues & you then align it.
Marc
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