04-09-2023, 08:04 PM
HI JK,
I have one of these also. MMFD is the same as pF. Move the decimal point 6 places, or just google convert uF (MFD) to pF (MMFD). It is an interesting circuit, as it uses a voltage divider in the screen circuit of one output tube to get the inverted signal needed for the other output tube. Therefore, make sure that your resistors in that circuit are good. I have not totally finished recapping my radio, but have replaced the 'lytics, bypass and audio coupling caps.
This radio uses tubes common to Philco's auto radios of the vintage, except for the XXL. This is a very good performer, except that you need a good long line antenna to get the best from it.
I have one of these also. MMFD is the same as pF. Move the decimal point 6 places, or just google convert uF (MFD) to pF (MMFD). It is an interesting circuit, as it uses a voltage divider in the screen circuit of one output tube to get the inverted signal needed for the other output tube. Therefore, make sure that your resistors in that circuit are good. I have not totally finished recapping my radio, but have replaced the 'lytics, bypass and audio coupling caps.
This radio uses tubes common to Philco's auto radios of the vintage, except for the XXL. This is a very good performer, except that you need a good long line antenna to get the best from it.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards,
MrFixr55
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