RE: [TCML] Stancor X-formers

[William Noble <william_b_noble@xxxxxxx>]

1. fil xfmr is 6.3V CT so 3.15V from CT to either leg

2. choke is for filtering, not current limit, though it won't know the difference

3. CTx is probably a saturable core xformer, like a SOLA type power supply - so it would produce the 200 amps at 5v without too much swing as input voltage varies - some wires are input V, some wires will go to a cap or other control circuit for regulation - you don't mention the form factor of the CTx - I presume its a standard looking xfmr - look for a piece of wood in the core
 
> From: chriskarr4@xxxxxxxxxxx
> To: tesla@xxxxxxxxxx
> Date: Thu, 29 Apr 2010 11:40:47 -0700
> Subject: [TCML] Stancor X-formers
> 
> 
> Hello Everyone,
> 
> 
> 
> I have recently come into posession of two Stancor filament transformers marked:
> 
> 
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> "6.3V CT 2.2A"
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> 
> 
> The hitch is this - the transformers have had the center-tap lead cut during production of their intended device (what I expect is a triode-based RF amplifier) and I am unsure as to whether the centre-tap (to) outer-lead connection is the 6.3V or if it is rated at 6.3V (hot+ to hot-).
> 
> 
> 
> Then, there are two-lead chokes marked:
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> 
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> "X* Hy (I know this means Henries and is a measure of inductance)
> 
> 50mA
> 
> DC Insul. Tested 1500V"
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> 
> 
> I understand that this means that the choke is capable of handling 1500VDC, though should only be ran at a maximum of ~1,200VDC due to the 1,200VDC being, likely, less-smooth than the testing apparatus.
> 
> 
> 
> My question is this - was this choke meant to be the method of current-limiting for the output of the plate transformer?
> 
> 
> 
> Then, there's the control-transformer:
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> 
> 
> It is marked as "Hi-potted" and has a _very_ large input winding with terminal lugs and two leads per lug into the transformer. It is labelled as -
> 
> "Control transformer
> 
> 5V 200A"
> 
> Then, there are a plethora of leads which extend from the other side of the transformer, all of which are around 12-14AWG stranded wire with synthetic insulation (such as PVC hook-up wire).
> 
> 
> 
> Here's the question - what the **** is this thing used for? Modulation of a plate-supply for amplitude-modulation broadcast? This seems somewhat unlikely due to its having a laminated-steel core, which seems (due to the thickness of the laminations) to be made for 50/60Hz. Any clue?
> 
> 
> 
> Last, but certainly not least -
> 
> There is a transformer in a _huge_ housing (comparatively) which also has three ovular-can capacitors. It has few markings, though it weighs (figuratively) half-a-ton. Somebody expected it might be an isolation transformer, though they reported it to be a step-up transformer, upon further testing. The ratio of input to output, however is not known/is not marked. The case has few markings and it is of the ever-famous, non-marked type.
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> The transformer's input and output are on a common side of the case and are mounted (equidistant from one-another, all four terminals) about two inches from eachother.
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> Any help with these matters is greatly appreciated.
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> 
> 
> Thank you,
> 
> 
> 
> - Christopher Karr
> 
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