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79MS Revisited - a wire fell off. Where does it go?
4/17/2009 1:02:51 AMDave Froehlich
Hello All,
I'm still working on the set with dead tuning motor and broken reverse switch. I disconnected all the signal seeker components. A couple of months ago, just as I was about to put the set back together a wire has fell off that connects to a tube socket. Looking at the bottom of the chassis (set is right side up), looking from the front the wire comes from the missing pin on the second tube from the right. This terminal connects through a coil to what looks like pin 5 of the tube socket at right. This wire probably connected to a terminal near the tuning coils. But I don't know where it went. Also, it has been so long, I cannot find the service data anymore. I can post a picture of the trouble area if needed. All I want to do is have this radio work as a mamual AM radio.

Thanks,

Dave

4/18/2009 5:42:23 PMEdd










Sir Dave:


Hows about getting the unit operational in the manual mode and then making the exclusion of that specific circuitry, via the consultation of the accompanying schema.


LATEST ADDENDA. . . .


Here is a replay of the schematic for you to reference to find that ONE intact end of the wires connection point.

When you think that you have found the other wire ends point of connection, gently use some wet rosin saturated solder wick to absorb all of the solder from that junction and the broken wire remnant should then magically appear for confirmation.



Ford SignalSeeker Car Ray-dee-oo :





73's de Edd






4/20/2009 4:13:39 PMDave Froehlich
Edd,
This set has very brittle phenolic parts. I seem to remember a cracked tube socket with pin recepticles pulled out. For some reason I don't see them now. The place where you are showing me to cut the wire, I can't find. Probably because I have removed the motor and gears. So there are hanging wires in a lot of places. I think that the filament wire is disconnected from where the switch is. I'll check that again.
Thanks very much for the schematic agaain too. I might be able to find the wire in question by the tube and pin number.

Thanks,

Dave
:
:
:
:
:
:
:
:
:
:
:Sir Dave:
:
:
:Hows about getting the unit operational in the manual mode and then making the exclusion of that specific circuitry, via the consultation of the accompanying schema.
:
:
:LATEST ADDENDA. . . .

:
:
:Here is a replay of the schematic for you to reference to find that ONE intact end of the wires connection point.
:
:When you think that you have found the other wire ends point of connection, gently use some wet rosin saturated solder wick to absorb all of the solder from that junction and the broken wire remnant should then magically appear for confirmation.
:
:
:
:
:
:Ford SignalSeeker Car Ray-dee-oo :
:
:
:
:
:
:73's de Edd

:
:
:
:
:
:

4/20/2009 5:03:30 PMDave Froehlich
Edd,
The pin recepticle has come of the 12K5 relay control tube. This recepticle was on pin 7. I don't see a pin 7 on a 12K7. So it was just being used for the terminal.
The wire that I don't know where it goes, is probably the problem. 12AD6 is where that coil connects to. From pin 5 on the first 12AD6 a coil and capacitor are in parallel (L3-C7). This is what I saw that the wire is connected to. The other end of that parelled pair. Which means that the wire connected to A5. So which trimmer is A5? I will find out.
The relay contacts just fell off again. This set deteriorates everytime it's touched. It's a bit of a nightmare.
Anyway, If I have the relay disconnected, I don't think I need to replace the relay control tube socket. So maybe it The radio) will work after I connect the hanging wire. Maybe I have to connect some of the wires to simulate the normally closed part of the relay? I just noticed that pin 7 of the other 12AD6 also fell off. It connects to A9 and the other end of A5. Yes, it too fell off a terminal on A5. I think that solves the no sound problem and I do not have to replace the socket. I'll let you know.

Thanks again,

Dave

:Edd,
: This set has very brittle phenolic parts. I seem to remember a cracked tube socket with pin recepticles pulled out. For some reason I don't see them now. The place where you are showing me to cut the wire, I can't find. Probably because I have removed the motor and gears. So there are hanging wires in a lot of places. I think that the filament wire is disconnected from where the switch is. I'll check that again.
: Thanks very much for the schematic agaain too. I might be able to find the wire in question by the tube and pin number.
:
:Thanks,
:
:Dave
::
::
::
::
::
::
::
::
::
::
::Sir Dave:
::
::
::Hows about getting the unit operational in the manual mode and then making the exclusion of that specific circuitry, via the consultation of the accompanying schema.
::
::
::LATEST ADDENDA. . . .

::
::
::Here is a replay of the schematic for you to reference to find that ONE intact end of the wires connection point.
::
::When you think that you have found the other wire ends point of connection, gently use some wet rosin saturated solder wick to absorb all of the solder from that junction and the broken wire remnant should then magically appear for confirmation.
::
::
::
::
::
::Ford SignalSeeker Car Ray-dee-oo :
::
::
::
::
::
::73's de Edd

::
::
::
::
::
::

4/20/2009 6:41:39 PMDave Froehlich
Edd,
Now that I have A5 re-connected. It doesn't sound as if the sound is muted anymore. So that problem is solved.
It's very sensitive around the antenna connection, however no matter where the tuning coils are tuned, no station can be received. So something else has gone awry, like the oscillator isn't working. I'll keep checking. I want to get this done tonight. I have to wire the power "on" because the power switch for the radio is broken as well. The part of the power switch that turns the dial light on and off is fine. I think I mentioned this before.
My last problem is "Why can't I receive any stations?"

Thanks,

Dave
:Edd,
: The pin recepticle has come of the 12K5 relay control tube. This recepticle was on pin 7. I don't see a pin 7 on a 12K7. So it was just being used for the terminal.
: The wire that I don't know where it goes, is probably the problem. 12AD6 is where that coil connects to. From pin 5 on the first 12AD6 a coil and capacitor are in parallel (L3-C7). This is what I saw that the wire is connected to. The other end of that parelled pair. Which means that the wire connected to A5. So which trimmer is A5? I will find out.
: The relay contacts just fell off again. This set deteriorates everytime it's touched. It's a bit of a nightmare.
: Anyway, If I have the relay disconnected, I don't think I need to replace the relay control tube socket. So maybe it The radio) will work after I connect the hanging wire. Maybe I have to connect some of the wires to simulate the normally closed part of the relay? I just noticed that pin 7 of the other 12AD6 also fell off. It connects to A9 and the other end of A5. Yes, it too fell off a terminal on A5. I think that solves the no sound problem and I do not have to replace the socket. I'll let you know.
:
:Thanks again,
:
:Dave
:
::Edd,
:: This set has very brittle phenolic parts. I seem to remember a cracked tube socket with pin recepticles pulled out. For some reason I don't see them now. The place where you are showing me to cut the wire, I can't find. Probably because I have removed the motor and gears. So there are hanging wires in a lot of places. I think that the filament wire is disconnected from where the switch is. I'll check that again.
:: Thanks very much for the schematic agaain too. I might be able to find the wire in question by the tube and pin number.
::
::Thanks,
::
::Dave
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::Sir Dave:
:::
:::
:::Hows about getting the unit operational in the manual mode and then making the exclusion of that specific circuitry, via the consultation of the accompanying schema.
:::
:::
:::LATEST ADDENDA. . . .

:::
:::
:::Here is a replay of the schematic for you to reference to find that ONE intact end of the wires connection point.
:::
:::When you think that you have found the other wire ends point of connection, gently use some wet rosin saturated solder wick to absorb all of the solder from that junction and the broken wire remnant should then magically appear for confirmation.
:::
:::
:::
:::
:::
:::Ford SignalSeeker Car Ray-dee-oo :
:::
:::
:::
:::
:::
:::73's de Edd

:::
:::
:::
:::
:::
:::

4/21/2009 12:31:29 AMDave Froehlich
Edd,
It's still not working. Maybe some wires have to be hooked up, that went to the relay. But which ones I have no idea. I don't think I'll be done with it tonight.

Thanks,

Dave
:Edd,
: Now that I have A5 re-connected. It doesn't sound as if the sound is muted anymore. So that problem is solved.
: It's very sensitive around the antenna connection, however no matter where the tuning coils are tuned, no station can be received. So something else has gone awry, like the oscillator isn't working. I'll keep checking. I want to get this done tonight. I have to wire the power "on" because the power switch for the radio is broken as well. The part of the power switch that turns the dial light on and off is fine. I think I mentioned this before.
: My last problem is "Why can't I receive any stations?"
:
:Thanks,
:
:Dave
::Edd,
:: The pin recepticle has come of the 12K5 relay control tube. This recepticle was on pin 7. I don't see a pin 7 on a 12K7. So it was just being used for the terminal.
:: The wire that I don't know where it goes, is probably the problem. 12AD6 is where that coil connects to. From pin 5 on the first 12AD6 a coil and capacitor are in parallel (L3-C7). This is what I saw that the wire is connected to. The other end of that parelled pair. Which means that the wire connected to A5. So which trimmer is A5? I will find out.
:: The relay contacts just fell off again. This set deteriorates everytime it's touched. It's a bit of a nightmare.
:: Anyway, If I have the relay disconnected, I don't think I need to replace the relay control tube socket. So maybe it The radio) will work after I connect the hanging wire. Maybe I have to connect some of the wires to simulate the normally closed part of the relay? I just noticed that pin 7 of the other 12AD6 also fell off. It connects to A9 and the other end of A5. Yes, it too fell off a terminal on A5. I think that solves the no sound problem and I do not have to replace the socket. I'll let you know.
::
::Thanks again,
::
::Dave
::
:::Edd,
::: This set has very brittle phenolic parts. I seem to remember a cracked tube socket with pin recepticles pulled out. For some reason I don't see them now. The place where you are showing me to cut the wire, I can't find. Probably because I have removed the motor and gears. So there are hanging wires in a lot of places. I think that the filament wire is disconnected from where the switch is. I'll check that again.
::: Thanks very much for the schematic agaain too. I might be able to find the wire in question by the tube and pin number.
:::
:::Thanks,
:::
:::Dave
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::Sir Dave:
::::
::::
::::Hows about getting the unit operational in the manual mode and then making the exclusion of that specific circuitry, via the consultation of the accompanying schema.
::::
::::
::::LATEST ADDENDA. . . .

::::
::::
::::Here is a replay of the schematic for you to reference to find that ONE intact end of the wires connection point.
::::
::::When you think that you have found the other wire ends point of connection, gently use some wet rosin saturated solder wick to absorb all of the solder from that junction and the broken wire remnant should then magically appear for confirmation.
::::
::::
::::
::::
::::
::::Ford SignalSeeker Car Ray-dee-oo :
::::
::::
::::
::::
::::
::::73's de Edd

::::
::::
::::
::::
::::
::::



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