Hi,
The schematics are below.
I wired. Black to power/hot and White to neutral. Mains here are 123VAC.
Green/yellow to ground. Green Green per schematic.
I ASSUME yellow black (center tap) and yellow to 5Y3 per schematic.
I have two questions. Is the yellow 5V correct?
If I want higher voltage should I use the grey wire on the primary based on 123VAC mains?
Thanks,
Billy
The schematics are below.
I wired. Black to power/hot and White to neutral. Mains here are 123VAC.
Green/yellow to ground. Green Green per schematic.
I ASSUME yellow black (center tap) and yellow to 5Y3 per schematic.
I have two questions. Is the yellow 5V correct?
If I want higher voltage should I use the grey wire on the primary based on 123VAC mains?
Thanks,
Billy
Attachments
I am trying to figure how to get a 272 FX Hammond data sheet posted. Anyway the yellow 5V is Yellow Yellow Black Yellow.
Link to Hammond. https://www.hammfg.com/part/272FX
Link to Hammond. https://www.hammfg.com/part/272FX
Rectifier uses 5VAC, so connect the yellow and yellow to the filament.
Carefully isolate the yellow/black center tap, but do not connect it to anything.
Be aware that center tap is elevated at a high DC voltage.
If you want a higher B+, using the 115VAC tap instead of the 125VAC tap will do that,
but at the expense of lower current. The VA rating does not change.
Carefully isolate the yellow/black center tap, but do not connect it to anything.
Be aware that center tap is elevated at a high DC voltage.
If you want a higher B+, using the 115VAC tap instead of the 125VAC tap will do that,
but at the expense of lower current. The VA rating does not change.
Thanks for the help rayma. I was not sure what to do with the five volt center tap.
What do you think the yellow black to one of the yellow wires would be, 2.5VAC? I have not powered up the PT to measure the voltages.
Billy
What do you think the yellow black to one of the yellow wires would be, 2.5VAC? I have not powered up the PT to measure the voltages.
Billy
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Be really careful of the filament center tap, it's hundreds of volts above ground.
Yes, the 5VAC rectifier winding center tap gives 2.5VAC to either end of the winding.
But you cannot ground or otherwise connect the center tap anywhere at all, it has to float.
Cut off the bare end of the center tap wire, and cover the insulated end of the wire
with several thicknesses of heat shrink. No rubber tape, it will fall off in the heat.
Yes, the 5VAC rectifier winding center tap gives 2.5VAC to either end of the winding.
But you cannot ground or otherwise connect the center tap anywhere at all, it has to float.
Cut off the bare end of the center tap wire, and cover the insulated end of the wire
with several thicknesses of heat shrink. No rubber tape, it will fall off in the heat.
Got it. Marine shrink tube is what I normally use to isolate a wire. That type of shrink tube is thicker and cools very hard. No issue there.
Thanks again,
Billy
Thanks again,
Billy
The shrink tubing should go at least 1/2" beyond the end of the wire for voltage isolation.
Then use a nylon wire tie to tightly fix the tubing onto the wire, so it can't ever slide off.
This is a really critical place to isolate properly.
Then use a nylon wire tie to tightly fix the tubing onto the wire, so it can't ever slide off.
This is a really critical place to isolate properly.