01-25-2013, 07:43 PM
Mr Grumpy Wrote:Could i just buy a terminal strip and then solder new resistors across the terminals (in series)?
Absolutely! This is what I did in my 41-616.
[Image: http://i326.photobucket.com/albums/k420/..._00003.jpg]
The extra long terminal strip was pulled from a junk Philco chassis, so it looks sort of period "correct."
You can read the details here:
http://philcoradio.com/phorum/showthread...8#pid27888
Unfortunately, the service info does not give the wattage info for the Candohm resistors. To get an accurate wattage, you need to know two of the following:
1. The voltage drop across each section
2. The current flowing through each section
3. The resistance of each section
You are given the resistance. If you can find the voltage drop, you can determine the current with Ohm's law.
And then you can determine the power in watts using one of the two formulas:
P = (I*I)R or P = I*E
where P = power in watts, I = current in amps, R = resistance in ohms, E = voltage in volts
Unfortunately, Philco does not give the voltage drop or the current. So we have to guess at it.
Since the 268, 28 and 26 ohm resistances are used as a B- voltage divider, and the 780 ohm section provides cathode bias to the first and second IF tubes, the voltages are small. You should be safe using 5 watt resistors to replace each section. In fact 5 watt resistors may be a bit overkill, but better safe than sorry.
I used 5 watt resistors to replace the B- voltage divider Candohm sections in my 41-616, along with one 7 watt unit to replace one section with a high resistance. It worked out fine.
--
Ron Ramirez
Ferdinand IN