This is to outline the construction of a Solid State to 5U4G power supply:
These parts may not be optimal but I have decided to work with most of what I have on hand.
This will allow for 180deg phase shift between the plate and filament transformer.
The addition of a phase modulator and a separate filament transformer will allow for testing 0-360deg phase shift between the plate and filament transformer.
----------------------------------
Plate transformer:
Hammond 382X
283 VA
1,000V C.T. @ 230ma.
Bias tap 50v
Filament #1 - 5V C.T. @ 3A
Filament #2 - 6.3V C.T. @ 6A
2kv isolation
This will allow for -500v - 0v - +500v to the ss full wave and 5v 3a to the filament.
Because the filament winding is in the same core with the plate coil the only out of phase option on the filament is 180deg.
Adding a separate filament transformer will allow for 0-360deg phase to plate coil.
------------------------------
Filament transformer: Option A
TRW N585-A
5V @ 3A
1kv isolation
NOTE: this is not a center tapped transformer - it may need to be
------------------------------
Filament transformer: Option B
Hammond 266M5
2.5v - 0v - 2.5v+ @ 3a
Center Tapped
------------------------------
Solid State Rectifier:
T-SSR01
Direct plug-in replacement for 5AR4, 5U4 and 5Y3 rectifier tubes in amplifiers with center tapped secondary power transformer
+ 1 Ceramic Octal 8 Pin Tube EL34 Style Socket
------------------------------
Tube Rectifier:
RCA 5U4G - Black Plate ,Bottom D Getter
+ 1 Ceramic Octal 8 Pin Tube EL34 Style Socket
------------------------------
Choke:
Hammond 193M Choke
10H / 300MA / 800V / 63 OHM
-------------------------------
Things I dont know:
Is the filament transformer 5vac or 5vac center tapped?
If so is the high side taken from the center tap, or from one side of the 5v coil?
How is the output loaded, filter cap , chokes, etc...?
I would assume that it is loaded with a filter cap through a 10H choke and some sort of output load.. power resistor? bulb?
___________________________________________________________________________________________________________________
I originally got the idea from electron circuits which use vacuum rectifiers like the 5U4 GB or 5AR4 etc. The plate has a high voltage potential with lots of useable power available. You cant get to it or use it for anything without applying a heating voltage to the cathode or what is the cathode potential of the tube. So, you put in a small voltage of 5 volts AC 60 Hz which heats up the cathode and welcomes the electron stream from the plate. Or actually the other way around, but not important for this example of my thoughts. Now the high voltage power goes through the cathode and travels through the coils of the 5 volt transformer along with the 5 volt AC. If the plate voltage is not rectified then it is AC with a potential 60 Hz frequency. That combines with the 5 volt 60 Hz in the coil of the htr transformer and generally amounts to nothing. In fact the power of the 5 volt transformer amounts to nothing. It is an insignificant power supply except when the two transformers get slightly out of phase with each other, or when they are connected in reverse of one another. Then you can measure all kinds of things going on. You can generate all kinds of hash and multiple frequencies, and I do mean all kinds. What I measured during this process was very interesting. All these frequencies occasionally met at the same time with a much larger kick at the output.
Anyway, I have taken a high voltage power supply as follows: 500 v-0-500 v 300 mV plate transformer run it through a full wave silicon circuit then run it through a 5U4 electron tube rectifier. Now you know that the 5U4 requires 5 volts AC at 3 amps for its heater to gather the electrons and complete the circuit. Well, I measured the output from the tube and the result is 500 volts DC at 250 mV. The loss is due to the high impedance of the tube and its limited ability to dissipate more than 250 mA.. The point I wish to make here is that also along with the 500 volt DC is, yes, you guessed it, the 5 volts three amp AC current! They are both completely independent of each other except for some very interesting things I will mention to you some other time.. First of all, obviously you can have several different output components in the power output signal. You can have DC and AC together without any problem.
I was working at a laboratory at the time with much more sophisticated equipment then is available to even most manufacturing companies. I was able to analyses everything coming out of this simple two transformer AC high voltage circuit. In most power supplies there is lots of hash coming out and designers use a .05 or so to short out as much as possible before it gets to the smoothing capacitors. This hash comes from the mains supply and especially from the transformers themselves. Then the smoothing capacitors take out the rest of the multiple frequency hash along with the gigantic 60 Hz ac left in the B+. I became interested in the interaction between the two AC transformers. The interaction can be very reveling, trust me. Also, there is another interesting analogy. We seem to overlook so many things in our society. They are right in our faces but we just look around them without interest at all. When I began to study the effects of multiple frequencies combined together I found out that when you deliberately strive to create the worst case scenario of frequencies you start to get some very measurable kicks. In themselves they are not much. But if you make enough of them fast sendoff, you get a collectible power spike that is more then the power available to begin with. The destructive heating caused by the eddy currents become the problem we face when we make a really large powerful coil. Now you understand more about the heating problem and why using a fan does not work.