I just acquired this radio.
I can tune in few sations at one end of the SW band loud and clear.
I only get static on the rest.
I can not tune in any thing on the AM band, only static.
Where should I look.
Thank you so much every body and Merry Christmas to all.

Al

Al....Has this radio been electronically repaired or is it in original condition?
If the capacitors have not been changed out then this probably is major source of issue.

:Al....Has this radio been electronically repaired or is it in original condition?
:If the capacitors have not been changed out then this probably is major source of issue.
:
Dear Scot,

I see that they have changed all the small electrolytic capacitors and I did replace all the power supply 20 uf capacitors myself.
Should I go ahead and test the small capacitance electrolytics now.
Thanks.

Al

Looks like there is 2-20mfd/350v electrolytics and 1-20mfd/25v electrolytic.
Then,looking at the schematic, there are 7 regular paper capacitors.
These should all be replaced. The electrolytic replacements must be installed with the negative/ positive connected per schematic.

Along with replacing all of the paper caps, check for a negative voltage at pin 4 of the 6SA7. If not negative, then the oscillator is cutting out.

Check for drifted resistors in all of the circuitry involving this tube. Check for a weak/gassy tube. Check the tuning capacitor for shorts/dirt in both gangs, though if it works in a certain area for one band, but not for the other, then it is not likely the cause of your trouble.

:Along with replacing all of the paper caps, check for a negative voltage at pin 4 of the 6SA7. If not negative, then the oscillator is cutting out.
:
:Check for drifted resistors in all of the circuitry involving this tube. Check for a weak/gassy tube. Check the tuning capacitor for shorts/dirt in both gangs, though if it works in a certain area for one band, but not for the other, then it is not likely the cause of your trouble.
:

::Along with replacing all of the paper caps, check for a negative voltage at pin 4 of the 6SA7. If not negative, then the oscillator is cutting out.
::
::Check for drifted resistors in all of the circuitry involving this tube. Check for a weak/gassy tube. Check the tuning capacitor for shorts/dirt in both gangs, though if it works in a certain area for one band, but not for the other, then it is not likely the cause of your trouble.

The fact that you are getting any stations at all pretty well eliminates the IF section of the radio, so concentrate on the RF and converter stages, especially the antenna and oscillator coils. Use a high impedance meter (VTVM or DMM) for the negative grid check. It will probably de-tune the oscillator, but don't worry about that just now. If the grid stays negative throughout the tuning range, and is working on all bands, then start looking at the RF stage. It might be letting strong stations thru a bad coil, but that's all.
Keep us posted,
Lewis

Lewis
::
:
:

:::Along with replacing all of the paper caps, check for a negative voltage at pin 4 of the 6SA7. If not negative, then the oscillator is cutting out.
:::
:::Check for drifted resistors in all of the circuitry involving this tube. Check for a weak/gassy tube. Check the tuning capacitor for shorts/dirt in both gangs, though if it works in a certain area for one band, but not for the other, then it is not likely the cause of your trouble.
:
:
:The fact that you are getting any stations at all pretty well eliminates the IF section of the radio, so concentrate on the RF and converter stages, especially the antenna and oscillator coils. Use a high impedance meter (VTVM or DMM) for the negative grid check. It will probably de-tune the oscillator, but don't worry about that just now. If the grid stays negative throughout the tuning range, and is working on all bands, then start looking at the RF stage. It might be letting strong stations thru a bad coil, but that's all.
:Keep us posted,
:Lewis
:
:Lewis
:::
::
::
:
:

: Thank you so much every body.
Hopefully one day I will be half as good as you guys.
Few 101 questions.
1-Whwen I change resistors, should I use the exact wattage or I will have some slack like Capacitors.
2-Where do you guys get youe supplies.
I use antique electronic supplies on line, any other alternatives short of going to local meets.

Al

::Along with replacing all of the paper caps, check for a negative voltage at pin 4 of the 6SA7. If not negative, then the oscillator is cutting out.
:::
:::Check for drifted resistors in all of the circuitry involving this tube. Check for a weak/gassy tube. Check the tuning capacitor for shorts/dirt in both gangs, though if it works in a certain area for one band, but not for the other, then it is not likely the cause of your trouble.
:
:
:The fact that you are getting any stations at all pretty well eliminates the IF section of the radio, so concentrate on the RF and converter stages, especially the antenna and oscillator coils. Use a high impedance meter (VTVM or DMM) for the negative grid check. It will probably de-tune the oscillator, but don't worry about that just now. If the grid stays negative throughout the tuning range, and is working on all bands, then start looking at the RF stage. It might be letting strong stations thru a bad coil, but that's all.
:Keep us posted,
:Lewis
:
:Lewis
:::
::
::
:
:

Resistors should be the same or larger wattage. In some cases you can actually go smaller in wattage, but you need to know what you are dealing with. For instance, the grid of the 1st AF tube normally doesn't draw much current, and so the resistor wattage can be very small. The standard is 1/4, but 1/8 and smaller will work just fine, and I have seen some radios with smaller sized resistors in place.

As far as resistance itself, % deviation depends on the circuit. Until you are familiar with the needs of various circuits, it is best at this point to just stick to original valves.

Radio Daze is also a nice supplier, though their web page is leaving a bit to be desired lately.

This is also a very good site. http://www.renovatedradios.com/parts.html

Play Things of the Past is also good.