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I just bought a Marconi 1003 record player in a case, after inspection it has a stamp underneath that reads Audio Tool and Engineering 950a.
Do you think the name is different because parts have been changed?
when I turn it on to play a record I have to initiate the spin with my hand. There is a loud hum coming from what might be the motor, the box on the left.
Lastly, I get needle sound from the needle on the record, but nothing from the speakers. the tube lights up, maybe an amplifier problem? I did a visual check of the wire and soders and they seem to be okay.
Thoughts?Attachments:
Hi,
Your record player is a 1947-48 model year and both problems could be age related.The motor probably needs lubrication and is working hard. Marconi suggests lubrication once or twice a year by placing a few drops of light oil on the turntable spindle, motor and idler wheel shaft.
Lack of sound through the amp is most likely a failure of the crystal cartridge due to moisture over the years damaging the internal crystal. A replacement would be necessary, although perhaps hard to find with the right output voltage.
The amp may need to be re-capped.
The phono may be original, it was not unusual for manufacturers to purchase them rather than manufacture them.
Ed.
Ed, thanks so much! I will begin with that! You have given me valuable information! I am very excited about this project!
Hi again Ed,
I am having a heck of a time trying to get a schematic. As you can see, the very unofficial piece of paper that references model 1003. That model number only brings up the Marconi Playboy which has 2 tubes and 1 speaker, mine has 1 tube and 2 speakers, not to mention the difference in caps and resistors. Any ideas?Attachments:
Hi Matthew,
I have gone through my schematics and index lists and can only find the two tube model. The one tube model probably used a 117 volt tube such as 117l7/M7-GT or similar tubes that combined the rectifier and the amplifier in one tube.
RCC may not have published a schematic if it was not a popular model.
You may just have to go by the values of the current parts.
Ed.
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