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Crosley 515 problem
4/16/2004 1:30:31 AMJason
4/16/2004 1:39:02 AMJason
Hello again,

I still cant find the problem with my 515. As Norm suggested last month I did check the tube voltages. The rectifier seemed to be the only one with correct voltages. All others just had 6-7 volts for the heater. The other pins all had less than a volt. But probing a certain pin on each tube would make noise in the speaker just as Norm side. I also checked the coils off 27y and best as I can tell it is OK. Any idea about the voltage problem. Maybe its the transformer. Anymore help would be great. Sorry about the black post I hit enter to soon.
Thanks Jason

4/16/2004 11:40:42 AMNorm Leal
Hi Jason

Not a transformer problem if your tubes are lit and rectifier has voltage.

Check your speaker field marked as black & yellow wires on the schematic. This is the coil right about the number #26. If it's open you rectifier will have voltage but not the rest of the radio.

Norm

:Hello again,
:
:I still cant find the problem with my 515. As Norm suggested last month I did check the tube voltages. The rectifier seemed to be the only one with correct voltages. All others just had 6-7 volts for the heater. The other pins all had less than a volt. But probing a certain pin on each tube would make noise in the speaker just as Norm side. I also checked the coils off 27y and best as I can tell it is OK. Any idea about the voltage problem. Maybe its the transformer. Anymore help would be great. Sorry about the black post I hit enter to soon.
:Thanks Jason

4/16/2004 2:01:43 PMJason
Thanks Norm I will check it out. Thanks again. Maybe I am getting closer.
Jason

:Hi Jason
:
: Not a transformer problem if your tubes are lit and rectifier has voltage.
:
: Check your speaker field marked as black & yellow wires on the schematic. This is the coil right about the number #26. If it's open you rectifier will have voltage but not the rest of the radio.
:
:Norm
:
::Hello again,
::
::I still cant find the problem with my 515. As Norm suggested last month I did check the tube voltages. The rectifier seemed to be the only one with correct voltages. All others just had 6-7 volts for the heater. The other pins all had less than a volt. But probing a certain pin on each tube would make noise in the speaker just as Norm side. I also checked the coils off 27y and best as I can tell it is OK. Any idea about the voltage problem. Maybe its the transformer. Anymore help would be great. Sorry about the black post I hit enter to soon.
::Thanks Jason

4/18/2004 9:01:24 AMJason
OK checked the coil at yellow and black wires, it had some resistance but was not open. I checked the coil under it to and it was good to. Two of the the cap I replaces did not continuity should all of them have continuity. Any more ideas. Thanks so much for your help.
Jason
4/18/2004 11:08:57 AMNorm Leal
Hi Jason

Caps won't show continuity. If you read continuity testing a cap it's through other parts of the circuit.

Do you have voltage on both black & yellow wires to chassis? What voltage do you have between pin #1 (large pin) on your 80 and chassis? This is where B+ starts.

Norm

:OK checked the coil at yellow and black wires, it had some resistance but was not open. I checked the coil under it to and it was good to. Two of the the cap I replaces did not continuity should all of them have continuity. Any more ideas. Thanks so much for your help.
:Jason

4/18/2004 9:45:13 PMJason
Hey Norm
OK there is less than 1 volt where the yellow wire terminates to what looks to me like a strip resistor. The black wire has 8 volts at the 80 tube. The voltage at the 80 is 8 volts at the large pins and 308 volts on the smaller pins.

:Hi Jason
:
: Caps won't show continuity. If you read continuity testing a cap it's through other parts of the circuit.
:
: Do you have voltage on both black & yellow wires to chassis? What voltage do you have between pin #1 (large pin) on your 80 and chassis? This is where B+ starts.
:
:Norm
:
::OK checked the coil at yellow and black wires, it had some resistance but was not open. I checked the coil under it to and it was good to. Two of the the cap I replaces did not continuity should all of them have continuity. Any more ideas. Thanks so much for your help.
::Jason

4/19/2004 12:45:28 AMNorm Leal
Hi Jason

Either your 80 is bad or something is really loading the output. If the output is loaded this much the tube plates may be glowing red?

With plate voltage on the 80 and filaments lit DC should be found on the filament pin. Be sure you are checking for DC not AC voltage on large pin of the 80.

Norm

:Hey Norm
:OK there is less than 1 volt where the yellow wire terminates to what looks to me like a strip resistor. The black wire has 8 volts at the 80 tube. The voltage at the 80 is 8 volts at the large pins and 308 volts on the smaller pins.
:
::Hi Jason
::
:: Caps won't show continuity. If you read continuity testing a cap it's through other parts of the circuit.
::
:: Do you have voltage on both black & yellow wires to chassis? What voltage do you have between pin #1 (large pin) on your 80 and chassis? This is where B+ starts.
::
::Norm
::
:::OK checked the coil at yellow and black wires, it had some resistance but was not open. I checked the coil under it to and it was good to. Two of the the cap I replaces did not continuity should all of them have continuity. Any more ideas. Thanks so much for your help.
:::Jason

4/19/2004 3:29:32 PMJason
OK Norm
I put the 80 back in the tester and it is good. I checked the pins with meter in dc and the small pins had -8 vdc and the large pins had 290 vdc. Also the yellow wire had 220 vdc and the black wire had 290 vdc. Thanks so much for helping me, this is a very special old radio and I can wait to hear it play someday soon.
Jason
:Hi Jason
:
: Either your 80 is bad or something is really loading the output. If the output is loaded this much the tube plates may be glowing red?
:
: With plate voltage on the 80 and filaments lit DC should be found on the filament pin. Be sure you are checking for DC not AC voltage on large pin of the 80.
:
:Norm
:
::Hey Norm
::OK there is less than 1 volt where the yellow wire terminates to what looks to me like a strip resistor. The black wire has 8 volts at the 80 tube. The voltage at the 80 is 8 volts at the large pins and 308 volts on the smaller pins.
::
:::Hi Jason
:::
::: Caps won't show continuity. If you read continuity testing a cap it's through other parts of the circuit.
:::
::: Do you have voltage on both black & yellow wires to chassis? What voltage do you have between pin #1 (large pin) on your 80 and chassis? This is where B+ starts.
:::
:::Norm
:::
::::OK checked the coil at yellow and black wires, it had some resistance but was not open. I checked the coil under it to and it was good to. Two of the the cap I replaces did not continuity should all of them have continuity. Any more ideas. Thanks so much for your help.
::::Jason


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