Transformer Shorted? -Faintly lit up bulb without load.

Posted by rcollege (A) on February 23, 2015 at 12:38:26

In Reply to: RE: Bridge vs. Voltage Doubler for 4W SET posted by JKT on February 23, 2015 at 11:39:55:

Thank you for your input.

I'm trying to actually use all tube rectification to hear the difference for myself rather than only relying on researching and asking.

I don't have a choke...however I have the Damper tubes. I just pulled apart a transformer that was bad...so I now have laminates to wind my own choke.

Now I have a concern- I found that the Freed Transformer may have a short...I just tested it with a 40w light bulb in series with the primary and it faintly lit without any load on the secondaries. Being a 470V center tap...I'm concerned 520V may be too high for the windings under load. (520 due to 120V input rather than the 115V)

(I found 2 other transformers I had that lit the bulb up nice and bright...shorted windings. Socket and 40W bulb- One of the best $4 spent.)

Normality frightens me- its what they use to lure you into the cookie cutter.
Roger

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Follow Ups Full Thread

Topic - Bridge vs. Voltage Doubler for 4W SET - rcollege 10:30:43 02/23/15 (9)

RE: Bridge vs. Voltage Doubler for 4W SET - rcollege 14:29:10 02/25/15 (0)

RE: Bridge vs. Voltage Doubler for 4W SET - Tom Bavis 05:37:57 02/24/15 (0)

There is this point in the hobby when... - Chip647 13:57:40 02/23/15 (0)

RE: Bridge vs. Voltage Doubler for 4W SET - JKT 11:39:55 02/23/15 (5)

Transformer Shorted? -Faintly lit up bulb without load. - rcollege 12:38:26 02/23/15 (4)

RE: Transformer Shorted? -Faintly lit up bulb without load. - rcollege 14:20:17 02/25/15 (0)

RE: Transformer Shorted? -Faintly lit up bulb without load. - Michael Samra 22:06:22 02/24/15 (0)

RE: Transformer Shorted? -Faintly lit up bulb without load. - Triode_Kingdom 14:43:14 02/23/15 (0)

RE: Transformer Shorted? -Faintly lit up bulb without load. - Alpha Al 12:52:42 02/23/15 (0)

Follow Ups

Transformer Shorted? -Faintly lit up bulb without load. - rcollege 12:38:26 02/23/15 (4)

RE: Transformer Shorted? -Faintly lit up bulb without load. - rcollege 14:20:17 02/25/15 (0)

RE: Transformer Shorted? -Faintly lit up bulb without load. - Michael Samra 22:06:22 02/24/15 (0)

RE: Transformer Shorted? -Faintly lit up bulb without load. - Triode_Kingdom 14:43:14 02/23/15 (0)

RE: Transformer Shorted? -Faintly lit up bulb without load. - Alpha Al 12:52:42 02/23/15 (0)

Transformer Shorted? -Faintly lit up bulb without load.

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