Replacing them all with 0.5 will likely cause problems. This is especailly true in teh audio section. There wrong size capacitors will cause distortion in the audio.
Best Regards,
Bill Grimm
::Hi all I am restoring a Philco 52. It has a block of caps (Philco part # 03915 cap values are .1,.5,.25,.5,.15 )The wires comming out of the block are usually color coded making the job easy. In this case the wires are coded in tar and I can't make out color on wires. Plus the schematic does not give values..just the placement of caps by virtue of a number(23 on schematic) My question is..could I just replace all with .5 values or will this effect preformance??
:
:Replacing them all with 0.5 will likely cause problems. This is especailly true in teh audio section. There wrong size capacitors will cause distortion in the audio.
:
:Best Regards,
:
:Bill Grimm
I must respectfully disagree with Mr. Grim. I think all those caps are bypass caps, and the value isn't important. But, since it won't hurt anything, why don't you try it and see what happens?
Lewis
:::Hi all I am restoring a Philco 52. It has a block of caps (Philco part # 03915 cap values are .1,.5,.25,.5,.15 )The wires comming out of the block are usually color coded making the job easy. In this case the wires are coded in tar and I can't make out color on wires. Plus the schematic does not give values..just the placement of caps by virtue of a number(23 on schematic) My question is..could I just replace all with .5 values or will this effect preformance??
::
::Replacing them all with 0.5 will likely cause problems. This is especailly true in teh audio section. There wrong size capacitors will cause distortion in the audio.
::
::Best Regards,
::
::Bill Grim
:
:I must respectfully disagree with Mr. Grim. I think all those caps are bypass caps, and the value isn't important. But, since it won't hurt anything, why don't you try it and see what happens?
:Lewis
The .05 MFD caps may work well, but performance will most likely be affected in one way or another. Reduction in capactance in one of the cathode bias circuits may reduce bass response (I believe that it is in the detector). Reduction of capacitance in filter circuits may also reduce bass response, or make the circuit become unstable at low frequencies.
T.
:There are different capacitances to match the different resistances found in the various circuits. Capacitor drain rate affects low frequency passage and or supression. I do not know why, but as is typical, my brain is going blank on the exact term for this phenomenon.
:
:The .05 MFD caps may work well, but performance will most likely be affected in one way or another. Reduction in capactance in one of the cathode bias circuits may reduce bass response (I believe that it is in the detector). Reduction of capacitance in filter circuits may also reduce bass response, or make the circuit become unstable at low frequencies.
:
:T.
"Impedance " (reactance) of a capacitor varies with frequency: Xc=1/ 2 PI F C
From that formulae it is obvious that smaller capacitor values will have a higher "impedance" at lower frequencies (in term of audio, less bass).
Syl
Unless you are an engineer, I would trust the original engineer(s) of the radio and replace with correct values. I would think if a single values was acceptable, they would have used it then.
You know there is a Philco Forum on the net?
Syl
::Hi all I am restoring a Philco 52. It has a block of caps (Philco part # 03915 cap values are .1,.5,.25,.5,.15 )The wires comming out of the block are usually color coded making the job easy. In this case the wires are coded in tar and I can't make out color on wires. Plus the schematic does not give values..just the placement of caps by virtue of a number(23 on schematic) My question is..could I just replace all with .5 values or will this effect preformance??
:
:Unless you are an engineer, I would trust the original engineer(s) of the radio and replace with correct values. I would think if a single values was acceptable, they would have used it then.
:
:You know there is a Philco Forum on the net?
:
:Syl
Use this schematic. Most values are shown.
http://www.philcoradio.com/tech/images/51.jpg
You can use larger bypass caps. If an original was .1 mf it's ok to use .5 mf. Manufacturers figured lowest value acceptable as cost was less.
Norm
:Hi all I am restoring a Philco 52. It has a block of caps (Philco part # 03915 cap values are .1,.5,.25,.5,.15 )The wires comming out of the block are usually color coded making the job easy. In this case the wires are coded in tar and I can't make out color on wires. Plus the schematic does not give values..just the placement of caps by virtue of a number(23 on schematic) My question is..could I just replace all with .5 values or will this effect preformance??
:Hi
:
: Use this schematic. Most values are shown.
:
:http://www.philcoradio.com/tech/images/51.jpg
:
: You can use larger bypass caps. If an original was .1 mf it's ok to use .5 mf. Manufacturers figured lowest value acceptable as cost was less.
:
:Norm
:
::Hi all I am restoring a Philco 52. It has a block of caps (Philco part # 03915 cap values are .1,.5,.25,.5,.15 )The wires comming out of the block are usually color coded making the job easy. In this case the wires are coded in tar and I can't make out color on wires. Plus the schematic does not give values..just the placement of caps by virtue of a number(23 on schematic) My question is..could I just replace all with .5 values or will this effect preformance??