Check continuity of the osc coil. Not easy to follow Crosley schematics as they used their own numbers rather than part values.
http://www.nostalgiaair.org/PagesByModel/307/M0003307.pdf
Norm
:First let me say thanks for all the help this site has provided over the years. I'm a weekend hobbist at best so its a great resource that you provide. I have a Crosley 179 I've been trying to figure out. I've replaced the caps and several open resistors. All I get is a low volume hum from the speaker. I've checked the speaker coils and the tube voltages and they appear close to what the schematic shows. I have checked the coils and they have continuity. I was able to get a strong signal at the plate of the RF amp tube but a faint signal at best on the grid and plate of the Osc. I've also checked the volume and it appears to be ok. I'm thinking it may be a problem with the osc. Any thoughts about what else to check or what might be the problem and possible fix? Thanks Al
:
Hi Al
:
: Check continuity of the osc coil. Not easy to follow Crosley schematics as they used their own numbers rather than part values.
:
:http://www.nostalgiaair.org/PagesByModel/307/M0003307.pdf
:
:Norm
:
::First let me say thanks for all the help this site has provided over the years. I'm a weekend hobbist at best so its a great resource that you provide. I have a Crosley 179 I've been trying to figure out. I've replaced the caps and several open resistors. All I get is a low volume hum from the speaker. I've checked the speaker coils and the tube voltages and they appear close to what the schematic shows. I have checked the coils and they have continuity. I was able to get a strong signal at the plate of the RF amp tube but a faint signal at best on the grid and plate of the Osc. I've also checked the volume and it appears to be ok. I'm thinking it may be a problem with the osc. Any thoughts about what else to check or what might be the problem and possible fix? Thanks Al
::
:
:
Yes, you should have a signal on the oscillator. It will be the IF frequency above where your radio is tuned. If you tune your Crosley to 1000 a second radio should pick up the oscillator around 1181.5. The IF frequency is 181.5 in this radio.
Since the link didn't work you can click on "Resources" above. From there Crosley and the model number.
Norm
:Hi Norm: Thanks for responding and for all you've helped me with in the past. I'm afraid I'm about as good following links as I am fixing radios. I couldn't pull up the address up but guess it's the schematic for the 179. It is difficult to follow. Also this model Crosley has some unusual looking coils and transformers. All except the power trans are located under the chassis in small cans and they are difficult to identify even with the schematic. I believe the osc. coil is close to the 58 osc. tube with one of the leads going to the 58's grid. I checked the five leads on this coil for continuity and all appear to be giving a reading. Should I be getting a signal on the plate and grid of the osc tube? I can't think what else other than the coil that would cause it to drop the signal like that. Thanks. Al
:
:
:Hi Al
::
:: Check continuity of the osc coil. Not easy to follow Crosley schematics as they used their own numbers rather than part values.
::
::http://www.nostalgiaair.org/PagesByModel/307/M0003307.pdf
::
::Norm
::
:::First let me say thanks for all the help this site has provided over the years. I'm a weekend hobbist at best so its a great resource that you provide. I have a Crosley 179 I've been trying to figure out. I've replaced the caps and several open resistors. All I get is a low volume hum from the speaker. I've checked the speaker coils and the tube voltages and they appear close to what the schematic shows. I have checked the coils and they have continuity. I was able to get a strong signal at the plate of the RF amp tube but a faint signal at best on the grid and plate of the Osc. I've also checked the volume and it appears to be ok. I'm thinking it may be a problem with the osc. Any thoughts about what else to check or what might be the problem and possible fix? Thanks Al
:::
::
::
:
:
:Hi Al
:
: Yes, you should have a signal on the oscillator. It will be the IF frequency above where your radio is tuned. If you tune your Crosley to 1000 a second radio should pick up the oscillator around 1181.5. The IF frequency is 181.5 in this radio.
:
: Since the link didn't work you can click on "Resources" above. From there Crosley and the model number.
:
:Norm
:
::Hi Norm: Thanks for responding and for all you've helped me with in the past. I'm afraid I'm about as good following links as I am fixing radios. I couldn't pull up the address up but guess it's the schematic for the 179. It is difficult to follow. Also this model Crosley has some unusual looking coils and transformers. All except the power trans are located under the chassis in small cans and they are difficult to identify even with the schematic. I believe the osc. coil is close to the 58 osc. tube with one of the leads going to the 58's grid. I checked the five leads on this coil for continuity and all appear to be giving a reading. Should I be getting a signal on the plate and grid of the osc tube? I can't think what else other than the coil that would cause it to drop the signal like that. Thanks. Al
::
::
::Hi Al
:::
::: Check continuity of the osc coil. Not easy to follow Crosley schematics as they used their own numbers rather than part values.
:::
:::http://www.nostalgiaair.org/PagesByModel/307/M0003307.pdf
:::
:::Norm
:::
::::First let me say thanks for all the help this site has provided over the years. I'm a weekend hobbist at best so its a great resource that you provide. I have a Crosley 179 I've been trying to figure out. I've replaced the caps and several open resistors. All I get is a low volume hum from the speaker. I've checked the speaker coils and the tube voltages and they appear close to what the schematic shows. I have checked the coils and they have continuity. I was able to get a strong signal at the plate of the RF amp tube but a faint signal at best on the grid and plate of the Osc. I've also checked the volume and it appears to be ok. I'm thinking it may be a problem with the osc. Any thoughts about what else to check or what might be the problem and possible fix? Thanks Al
::::
:::
:::
::
::
:
:
If the coil shows continuity, resistance between terminals of each winding, it should be ok.
Osc coil is identified as part #6 on the schematic. It should have 2 windings with 5 leads.
May not be the coil at fault. Could be caps, resistors or the tube itself (53). You have several #58 tubes in your radio. Might try them in different sockets. Thry may not all oscillate in socket 53.
Be sure pins #2 and #3 on each 58 tube has B+ voltage.
http://www.nostalgiaair.org/PagesByModel/307/M0003307.pdf
Norm
:Thanks Norm: I did locate the schematic and parts list from the resource link. The coil I've been focusing on has two leads going to the osc. tube and one to a trimmer so I'm thinking this is the osc. coil. Two of the leads on this coil have voltage readings and the remaining three have no readings. I would think both the primary and secondary would have similar voltages. I did try the osc test with another radio and could not pick up a signal so I'm guessing that the coil is at least a major problem with the radio. If it has a bad coil are the only options to locate a parts set with a working one? Thanks again for the help. Al
:
::Hi Al
::
:: Yes, you should have a signal on the oscillator. It will be the IF frequency above where your radio is tuned. If you tune your Crosley to 1000 a second radio should pick up the oscillator around 1181.5. The IF frequency is 181.5 in this radio.
::
:: Since the link didn't work you can click on "Resources" above. From there Crosley and the model number.
::
::Norm
::
:::Hi Norm: Thanks for responding and for all you've helped me with in the past. I'm afraid I'm about as good following links as I am fixing radios. I couldn't pull up the address up but guess it's the schematic for the 179. It is difficult to follow. Also this model Crosley has some unusual looking coils and transformers. All except the power trans are located under the chassis in small cans and they are difficult to identify even with the schematic. I believe the osc. coil is close to the 58 osc. tube with one of the leads going to the 58's grid. I checked the five leads on this coil for continuity and all appear to be giving a reading. Should I be getting a signal on the plate and grid of the osc tube? I can't think what else other than the coil that would cause it to drop the signal like that. Thanks. Al
:::
:::
:::Hi Al
::::
:::: Check continuity of the osc coil. Not easy to follow Crosley schematics as they used their own numbers rather than part values.
::::
::::http://www.nostalgiaair.org/PagesByModel/307/M0003307.pdf
::::
::::Norm
::::
:::::First let me say thanks for all the help this site has provided over the years. I'm a weekend hobbist at best so its a great resource that you provide. I have a Crosley 179 I've been trying to figure out. I've replaced the caps and several open resistors. All I get is a low volume hum from the speaker. I've checked the speaker coils and the tube voltages and they appear close to what the schematic shows. I have checked the coils and they have continuity. I was able to get a strong signal at the plate of the RF amp tube but a faint signal at best on the grid and plate of the Osc. I've also checked the volume and it appears to be ok. I'm thinking it may be a problem with the osc. Any thoughts about what else to check or what might be the problem and possible fix? Thanks Al
:::::
::::
::::
:::
:::
::
::
:
:
:Thanks Norm: I did locate the schematic and parts list from the resource link. The coil I've been focusing on has two leads going to the osc. tube and one to a trimmer so I'm thinking this is the osc. coil. Two of the leads on this coil have voltage readings and the remaining three have no readings. I would think both the primary and secondary would have similar voltages. I did try the osc test with another radio and could not pick up a signal so I'm guessing that the coil is at least a major problem with the radio. If it has a bad coil are the only options to locate a parts set with a working one? Thanks again for the help. Al
:
::Hi Al
::
:: Yes, you should have a signal on the oscillator. It will be the IF frequency above where your radio is tuned. If you tune your Crosley to 1000 a second radio should pick up the oscillator around 1181.5. The IF frequency is 181.5 in this radio.
::
:: Since the link didn't work you can click on "Resources" above. From there Crosley and the model number.
::
::Norm
::
:::Hi Norm: Thanks for responding and for all you've helped me with in the past. I'm afraid I'm about as good following links as I am fixing radios. I couldn't pull up the address up but guess it's the schematic for the 179. It is difficult to follow. Also this model Crosley has some unusual looking coils and transformers. All except the power trans are located under the chassis in small cans and they are difficult to identify even with the schematic. I believe the osc. coil is close to the 58 osc. tube with one of the leads going to the 58's grid. I checked the five leads on this coil for continuity and all appear to be giving a reading. Should I be getting a signal on the plate and grid of the osc tube? I can't think what else other than the coil that would cause it to drop the signal like that. Thanks. Al
:::
:::
:::Hi Al
::::
:::: Check continuity of the osc coil. Not easy to follow Crosley schematics as they used their own numbers rather than part values.
::::
::::http://www.nostalgiaair.org/PagesByModel/307/M0003307.pdf
::::
::::Norm
::::
:::::First let me say thanks for all the help this site has provided over the years. I'm a weekend hobbist at best so its a great resource that you provide. I have a Crosley 179 I've been trying to figure out. I've replaced the caps and several open resistors. All I get is a low volume hum from the speaker. I've checked the speaker coils and the tube voltages and they appear close to what the schematic shows. I have checked the coils and they have continuity. I was able to get a strong signal at the plate of the RF amp tube but a faint signal at best on the grid and plate of the Osc. I've also checked the volume and it appears to be ok. I'm thinking it may be a problem with the osc. Any thoughts about what else to check or what might be the problem and possible fix? Thanks Al
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