Sparton Model 121

2/6/2007 5:41:57 PMDave Froehlich

Hello All,
There is a page in the resources for this model but no schematic here:
http://www.nostalgiaair.org/Resources/652/M0018652.htm

Is the schematic somewere else or did Riders omit that one?

Thanks,

Dave

2/6/2007 7:04:48 PMCarl

:Hello All,
: There is a page in the resources for this model but no schematic here:
:http://www.nostalgiaair.org/Resources/652/M0018652.htm
:
: Is the schematic somewere else or did Riders omit that one?
:
:Thanks,

Hi Dave,
There is a Beitman schematic available in DJVU format:
http://techpreservation.dyndns.org/schematics/
You will need a plug-in or viewer, see instructions on the page linked above.
Carl
:
:Dave

2/6/2007 9:13:05 PMDave Froehlich

Carl,
Thanks very much.

Dave
::Hello All,
:: There is a page in the resources for this model but no schematic here:
::http://www.nostalgiaair.org/Resources/652/M0018652.htm
::
:: Is the schematic somewere else or did Riders omit that one?
::
::Thanks,
:
:Hi Dave,
:There is a Beitman schematic available in DJVU format:
:http://techpreservation.dyndns.org/schematics/
:You will need a plug-in or viewer, see instructions on the page linked above.
:Carl
::
::Dave

2/6/2007 9:22:01 PMDave Froehlich

Carl,
Are the capacitors in the Sparton C-R units, ceramic or paper capacitors?

Thanks,

Dave

::Hello All,
:: There is a page in the resources for this model but no schematic here:
::http://www.nostalgiaair.org/Resources/652/M0018652.htm
::
:: Is the schematic somewere else or did Riders omit that one?
::
::Thanks,
:
:Hi Dave,
:There is a Beitman schematic available in DJVU format:
:http://techpreservation.dyndns.org/schematics/
:You will need a plug-in or viewer, see instructions on the page linked above.
:Carl
::
::Dave

2/6/2007 10:46:30 PMCarl

:Carl,
: Are the capacitors in the Sparton C-R units, ceramic or paper capacitors?
:
:Thanks,Dave

Looking at the parts list, they are capacitor/resistor units.
example: PA4330-10 consists of C17 & R7.
Without seeing the caps, I have no idea what type of cap was used.
Carl

2/7/2007 11:19:32 AMDave Froehlich

Carl,
OK, Maybe someone else knows. I will take a chance that they are ceramic. I don't think that they could be so small otherwise. They look like tiny white cylinders with a ring near one end. These units can have 2 or 3 wires on them. One is connected to the ring, one to the end near the ring and the optional wire is at the opposite end. I have seen them before in a radio but never so many.

Thanks very much again for the schematic.

Dave
::Carl,
:: Are the capacitors in the Sparton C-R units, ceramic or paper capacitors?
::
::Thanks,Dave
:
:Looking at the parts list, they are capacitor/resistor units.
:example: PA4330-10 consists of C17 & R7.
:Without seeing the caps, I have no idea what type of cap was used.
:Carl

2/7/2007 11:19:34 AMDave Froehlich

Carl,
OK, Maybe someone else knows. I will take a chance that they are ceramic. I don't think that they could be so small otherwise. They look like tiny white cylinders with a ring near one end. These units can have 2 or 3 wires on them. One is connected to the ring, one to the end near the ring and the optional wire is at the opposite end. I have seen them before in a radio but never so many.

Thanks very much again for the schematic.

Dave
::Carl,
:: Are the capacitors in the Sparton C-R units, ceramic or paper capacitors?
::
::Thanks,Dave
:
:Looking at the parts list, they are capacitor/resistor units.
:example: PA4330-10 consists of C17 & R7.
:Without seeing the caps, I have no idea what type of cap was used.
:Carl

2/9/2007 10:13:26 PMDave Froehlich

Hello All,
They must be ceramic capacitors in the C-R units because after replacing one paper capacitor and 5 electrolytic capacitors this radio is working like new. There's a very tiny amount of hum but it's not noticable at normal listening levels. The 6 x 9 speaker delivers a full rich sound from FM.
Now if I could find a dial stringing diagram, that would help me complete this restoration.

Thaniks,

Dave
Carl,
: OK, Maybe someone else knows. I will take a chance that they are ceramic. I don't think that they could be so small otherwise. They look like tiny white cylinders with a ring near one end. These units can have 2 or 3 wires on them. One is connected to the ring, one to the end near the ring and the optional wire is at the opposite end. I have seen them before in a radio but never so many.
:
:Thanks very much again for the schematic.
:
:Dave
:::Carl,
::: Are the capacitors in the Sparton C-R units, ceramic or paper capacitors?
:::
:::Thanks,Dave
::
::Looking at the parts list, they are capacitor/resistor units.
::example: PA4330-10 consists of C17 & R7.
::Without seeing the caps, I have no idea what type of cap was used.
::Carl

2/9/2007 10:38:57 PMBill VA

Dave, you need to get a copy of SAMS 57-19. Someone may have a copy or perhaps your library carries them.

Bill VA

:Hello All,
: They must be ceramic capacitors in the C-R units because after replacing one paper capacitor and 5 electrolytic capacitors this radio is working like new. There's a very tiny amount of hum but it's not noticable at normal listening levels. The 6 x 9 speaker delivers a full rich sound from FM.
: Now if I could find a dial stringing diagram, that would help me complete this restoration.
:
:Thaniks,
:
:Dave
:Carl,
:: OK, Maybe someone else knows. I will take a chance that they are ceramic. I don't think that they could be so small otherwise. They look like tiny white cylinders with a ring near one end. These units can have 2 or 3 wires on them. One is connected to the ring, one to the end near the ring and the optional wire is at the opposite end. I have seen them before in a radio but never so many.
::
::Thanks very much again for the schematic.
::
::Dave
::::Carl,
:::: Are the capacitors in the Sparton C-R units, ceramic or paper capacitors?
::::
::::Thanks,Dave
:::
:::Looking at the parts list, they are capacitor/resistor units.
:::example: PA4330-10 consists of C17 & R7.
:::Without seeing the caps, I have no idea what type of cap was used.
:::Carl

2/9/2007 10:41:03 PMDave Froehlich

Bill,
It's also in SAMS dial stringing diagrams volume 2 diagram 977. I have neither of them.

Thanks for the SAMS cross reference.

Dave
:Dave, you need to get a copy of SAMS 57-19. Someone may have a copy or perhaps your library carries them.
:
:Bill VA
:
::Hello All,
:: They must be ceramic capacitors in the C-R units because after replacing one paper capacitor and 5 electrolytic capacitors this radio is working like new. There's a very tiny amount of hum but it's not noticable at normal listening levels. The 6 x 9 speaker delivers a full rich sound from FM.
:: Now if I could find a dial stringing diagram, that would help me complete this restoration.
::
::Thaniks,
::
::Dave
::Carl,
::: OK, Maybe someone else knows. I will take a chance that they are ceramic. I don't think that they could be so small otherwise. They look like tiny white cylinders with a ring near one end. These units can have 2 or 3 wires on them. One is connected to the ring, one to the end near the ring and the optional wire is at the opposite end. I have seen them before in a radio but never so many.
:::
:::Thanks very much again for the schematic.
:::
:::Dave
:::::Carl,
::::: Are the capacitors in the Sparton C-R units, ceramic or paper capacitors?
:::::
:::::Thanks,Dave
::::
::::Looking at the parts list, they are capacitor/resistor units.
::::example: PA4330-10 consists of C17 & R7.
::::Without seeing the caps, I have no idea what type of cap was used.
::::Carl