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trouble with 6 volt auto radio
4/10/1998 12:08:05 PMwayne
April 10/98

I am a nubee to repairing old radios. I am restoring a
classic Chevy pickup truck ('54) and wish to do as much
of the work myself.

The existing radio is a 6 volt (6 tube) dial radio (Delco)that
has quit working after the following was done. (It was an
attempted to cure an annoying sound level cutout)

On the advice of a friend I attempted to replace
several (waxed paper-type) condensers with similar
value ceramic disk and mylar capacitors.
Also replaced were a couple of original tubular enamalled
resistors with new ceramic hi-wattage types.

Upon doing all that, the panel light lights but there is
now no audible sound from the speaker.
The vibrator hums though. The tubes don't light except dimmly
when the vibrator is either unplugged or the antenna is connected.
I measured the amperage draw and instead of the normal
4-6 amps I now get only 3 amps draw. When truck's antenna
is plugged in the amp reading goes up to about 6+ amps
and the vibrator hums real well. But still no tunes.

I have rechecked to make sure the chassis is well grounded
and it seems to be good and solid.

Any suggestions appreciated.

Wayne

4/11/1998 6:08:22 PMBruce Hagen
: April 10/98

: I am a nubee to repairing old radios. I am restoring a
: classic Chevy pickup truck ('54) and wish to do as much
: of the work myself.

: The existing radio is a 6 volt (6 tube) dial radio (Delco)that
: has quit working after the following was done. (It was an
: attempted to cure an annoying sound level cutout)
:
: On the advice of a friend I attempted to replace
: several (waxed paper-type) condensers with similar
: value ceramic disk and mylar capacitors.
: Also replaced were a couple of original tubular enamalled
: resistors with new ceramic hi-wattage types.

: Upon doing all that, the panel light lights but there is
: now no audible sound from the speaker.
: The vibrator hums though. The tubes don't light except dimmly
: when the vibrator is either unplugged or the antenna is connected.
: I measured the amperage draw and instead of the normal
: 4-6 amps I now get only 3 amps draw. When truck's antenna
: is plugged in the amp reading goes up to about 6+ amps
: and the vibrator hums real well. But still no tunes.

: I have rechecked to make sure the chassis is well grounded
: and it seems to be good and solid.

: Any suggestions appreciated.
:
: Wayne

4/11/1998 6:08:57 PMBruce Hagen
: April 10/98

: I am a nubee to repairing old radios. I am restoring a
: classic Chevy pickup truck ('54) and wish to do as much
: of the work myself.

: The existing radio is a 6 volt (6 tube) dial radio (Delco)that
: has quit working after the following was done. (It was an
: attempted to cure an annoying sound level cutout)
:
: On the advice of a friend I attempted to replace
: several (waxed paper-type) condensers with similar
: value ceramic disk and mylar capacitors.
: Also replaced were a couple of original tubular enamalled
: resistors with new ceramic hi-wattage types.

: Upon doing all that, the panel light lights but there is
: now no audible sound from the speaker.
: The vibrator hums though. The tubes don't light except dimmly
: when the vibrator is either unplugged or the antenna is connected.
: I measured the amperage draw and instead of the normal
: 4-6 amps I now get only 3 amps draw. When truck's antenna
: is plugged in the amp reading goes up to about 6+ amps
: and the vibrator hums real well. But still no tunes.

: I have rechecked to make sure the chassis is well grounded
: and it seems to be good and solid.

: Any suggestions appreciated.
:
: Wayne

4/11/1998 6:09:06 PMBruce Hagen
: April 10/98

: I am a nubee to repairing old radios. I am restoring a
: classic Chevy pickup truck ('54) and wish to do as much
: of the work myself.

: The existing radio is a 6 volt (6 tube) dial radio (Delco)that
: has quit working after the following was done. (It was an
: attempted to cure an annoying sound level cutout)
:
: On the advice of a friend I attempted to replace
: several (waxed paper-type) condensers with similar
: value ceramic disk and mylar capacitors.
: Also replaced were a couple of original tubular enamalled
: resistors with new ceramic hi-wattage types.

: Upon doing all that, the panel light lights but there is
: now no audible sound from the speaker.
: The vibrator hums though. The tubes don't light except dimmly
: when the vibrator is either unplugged or the antenna is connected.
: I measured the amperage draw and instead of the normal
: 4-6 amps I now get only 3 amps draw. When truck's antenna
: is plugged in the amp reading goes up to about 6+ amps
: and the vibrator hums real well. But still no tunes.

: I have rechecked to make sure the chassis is well grounded
: and it seems to be good and solid.

: Any suggestions appreciated.
:
: Wayne

4/11/1998 6:11:13 PMBruce Hagen
: April 10/98

: I am a nubee to repairing old radios. I am restoring a
: classic Chevy pickup truck ('54) and wish to do as much
: of the work myself.

: The existing radio is a 6 volt (6 tube) dial radio (Delco)that
: has quit working after the following was done. (It was an
: attempted to cure an annoying sound level cutout)
:
: On the advice of a friend I attempted to replace
: several (waxed paper-type) condensers with similar
: value ceramic disk and mylar capacitors.
: Also replaced were a couple of original tubular enamalled
: resistors with new ceramic hi-wattage types.

: Upon doing all that, the panel light lights but there is
: now no audible sound from the speaker.
: The vibrator hums though. The tubes don't light except dimmly
: when the vibrator is either unplugged or the antenna is connected.
: I measured the amperage draw and instead of the normal
: 4-6 amps I now get only 3 amps draw. When truck's antenna
: is plugged in the amp reading goes up to about 6+ amps
: and the vibrator hums real well. But still no tunes.
NUmber 1: Get new friends.
Number 2: Put back what you took out and hpoe that it plays.
Number 3: Find a car radio man in his 60's.
: I have rechecked to make sure the chassis is well grounded
: and it seems to be good and solid.

: Any suggestions appreciated.
:
: Wayne

4/11/1998 6:11:28 PMBruce Hagen
: April 10/98

: I am a nubee to repairing old radios. I am restoring a
: classic Chevy pickup truck ('54) and wish to do as much
: of the work myself.

: The existing radio is a 6 volt (6 tube) dial radio (Delco)that
: has quit working after the following was done. (It was an
: attempted to cure an annoying sound level cutout)
:
: On the advice of a friend I attempted to replace
: several (waxed paper-type) condensers with similar
: value ceramic disk and mylar capacitors.
: Also replaced were a couple of original tubular enamalled
: resistors with new ceramic hi-wattage types.

: Upon doing all that, the panel light lights but there is
: now no audible sound from the speaker.
: The vibrator hums though. The tubes don't light except dimmly
: when the vibrator is either unplugged or the antenna is connected.
: I measured the amperage draw and instead of the normal
: 4-6 amps I now get only 3 amps draw. When truck's antenna
: is plugged in the amp reading goes up to about 6+ amps
: and the vibrator hums real well. But still no tunes.
NUmber 1: Get new friends.
Number 2: Put back what you took out and hope that it plays.
Number 3: Find a car radio man in his 60's.
: I have rechecked to make sure the chassis is well grounded
: and it seems to be good and solid.

: Any suggestions appreciated.
:
: Wayne

4/19/1998 8:10:57 PMBob Rosengarten

: : April 10/98

: : I am a nubee to repairing old radios. I am restoring a
: : classic Chevy pickup truck ('54) and wish to do as much
: : of the work myself.

: : The existing radio is a 6 volt (6 tube) dial radio (Delco)that
: : has quit working after the following was done. (It was an
: : attempted to cure an annoying sound level cutout)
: :
: : On the advice of a friend I attempted to replace
: : several (waxed paper-type) condensers with similar
: : value ceramic disk and mylar capacitors.
: : Also replaced were a couple of original tubular enamalled
: : resistors with new ceramic hi-wattage types.

: : Upon doing all that, the panel light lights but there is
: : now no audible sound from the speaker.
: : The vibrator hums though. The tubes don't light except dimmly
: : when the vibrator is either unplugged or the antenna is connected.
: : I measured the amperage draw and instead of the normal
: : 4-6 amps I now get only 3 amps draw. When truck's antenna
: : is plugged in the amp reading goes up to about 6+ amps
: : and the vibrator hums real well. But still no tunes.
: NUmber 1: Get new friends.
: Number 2: Put back what you took out and hope that it plays.
: Number 3: Find a car radio man in his 60's.
: : I have rechecked to make sure the chassis is well grounded
: : and it seems to be good and solid.

: : Any suggestions appreciated.
: :
: : Wayne

Wayne,

This may be way out on a limb but possibly one of the "resistors" you replaced was a ceramic capacitor or choke/inductor that LOOKS like a resistor. Just a thought. I don't have the SAMS you need-I had a 50 Chevy truck radio, but sold it and included the schematics with it-it is a similar set. It sounds like something you replaced has really altered the circuitry. There are numerous schematic servies I've seen through "Antique Radio Classified" and several on-line antique radio services.

Bob Rosengarten
Clarksville OH

8/24/1998 8:53:24 PMRalph Schneider
: April 10/98

: I am a nubee to repairing old radios. I am restoring a
: classic Chevy pickup truck ('54) and wish to do as much
: of the work myself.

: The existing radio is a 6 volt (6 tube) dial radio (Delco)that
: has quit working after the following was done. (It was an
: attempted to cure an annoying sound level cutout)
:
: On the advice of a friend I attempted to replace
: several (waxed paper-type) condensers with similar
: value ceramic disk and mylar capacitors.
: Also replaced were a couple of original tubular enamalled
: resistors with new ceramic hi-wattage types.

: Upon doing all that, the panel light lights but there is
: now no audible sound from the speaker.
: The vibrator hums though. The tubes don't light except dimmly
: when the vibrator is either unplugged or the antenna is connected.
: I measured the amperage draw and instead of the normal
: 4-6 amps I now get only 3 amps draw. When truck's antenna
: is plugged in the amp reading goes up to about 6+ amps
: and the vibrator hums real well. But still no tunes.

: I have rechecked to make sure the chassis is well grounded
: and it seems to be good and solid.

: Any suggestions appreciated.
:
: Wayne

8/24/1998 9:03:03 PMRalph Schneider
: Wayne I have been fixing up old car radios for a bout 30 years, i have a number of suggestions. First get rid of those ceramic capacitors and replace them with Spauge Polyester or Polypropylene film capacitors. A good rule of thumb is to only replace in kind. only use a ceramic where it originaly was. Ceramic capactors tend to have wide tolerances and have por stabilty at high frequnecy. The next thing to do is get a schematic for the radio. And then go throught it stage by stage. You should find the problem in no time. Feel to contact me with any other questions. Ralph.


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