Oh Henry!!!!

It has been documented that it is advisable to change out the 50 ohm resistor after the first cap in the Dynamo ST-35 power supply with a choke. Most of the chokes I have seen are 200mA-250mA and 1.5H. This is supposed to aid in reducing ripple current. (Adding more capacitance in the power supply would help too.)

How about adding a choke with 4H instead? If the other parameters are the same, will the increase in inductance help even more? Can you have too much inductance?

4H will work fine. Do you already have the choke?  Make sure it will handle the current.  Also replacing the 50 ohm resistor with the choke will change your B+ since the DC resistance of the choke will be different from the resistor.  You may need to add a resistor in series to keep the B+ from going above its current level.  Most old tube circuits recommended at least 4H, so you are safe.

Thanks Tubes