fiftyfivefilms wrote:Hi Tom,
Shannon answered my questions so I'm good to go!...just one thing about the Antek.. Do you keep the plastic wrapping on or remove it?
Cheers!
Kirk
battradio wrote:fiftyfivefilms wrote:Hi Tom,
Shannon answered my questions so I'm good to go!...just one thing about the Antek.. Do you keep the plastic wrapping on or remove it?
Cheers!
Kirk
Hi Kirk ,
Do Not remove the Plastic film !
TomMcNally wrote:Sorry for the slow reply ...
The Antek high voltage windings are a little tricky. You need to put them in series, by connecting the "yellow and white" the issue is you don't know which is which. What I did is connect a low voltage AC transformer (9 volt wall wart) to the primary, and then carefully measured the secondary voltage, which when correct is about 70 volts. If you have it right, the windings "add" and if incorrect, they subtract. Easy ! I had to do the same thing with the two 6.3 filament windings, as the color codes on my transformer didn't match the documentation.
Good to hear the pics on my web site are inspirational. I often look back at my own amps for layout ideas too.
This is my first go at a big toroid, so far so good. Next time I'll go with a bigger chassis, the normal 12x8x3 is just big enough for the Clementine and James outputs.
Tom, so I ran this up to 9v on my variac, and found the yellow/white pair with the larger value. My question, does the larger value pair connect to the grounding pad? or does the lower value pair connect to the grounding pad?TomMcNally wrote:Sorry for the slow reply ...
The Antek high voltage windings are a little tricky. You need to put them in series, by connecting the "yellow and white" the issue is you don't know which is which. What I did is connect a low voltage AC transformer (9 volt wall wart) to the primary, and then carefully measured the secondary voltage, which when correct is about 70 volts. If you have it right, the windings "add" and if incorrect, they subtract. Easy ! I had to do the same thing with the two 6.3 filament windings, as the color codes on my transformer didn't match the documentation.
Good to hear the pics on my web site are inspirational. I often look back at my own amps for layout ideas too.
This is my first go at a big toroid, so far so good. Next time I'll go with a bigger chassis, the normal 12x8x3 is just big enough for the Clementine and James outputs.
TomMcNally wrote:They aren't pairs the way I have them twisted ... it's the "top" white and the "bottom" yellow, while the "center" white and yellow are twisted together and grounded. You are making a "center tap" with the center pair. When you series up the windings for testing with low voltage AC, you're looking for a high reading. If you get a low reading, reverse the pairs. In other words, when they are correctly in series, you will get a higher voltage than you get with them wrong. When you get it right, connect the "center" white & yellow to ground and use the other two for your high voltage. The voltage of the individual yellow and white winding sets doesn't matter.
TomMcNally wrote:Well, almost ... you have to make sure you're not shorting out the winding. You need yellow from one and white from the other. But the right ones. Antek would have made it a lot easier using different colors! Measure yellow to white (ohms with power off) and use two to test with that don't have readings between them. It's that phasing that's important, they will short, add or subtract depending on how you connect them.
tmbg wrote:Where can you get the antek transformers? I've tried to find them in the past and been unsuccessful.
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