Hammond makes a number of transformers with 115/230V primaries and a secondary that's either 115V or 115/230V. Some of these look just right for preamps. One that I'm considering for an upcoming project is the Hammond 186D120. This has a 115/230V primary and a 115V secondary rated for 250 mA. Used in reverse and applied to my line voltage of roughly 120V, it would output about 240V. With a full wave bridge, that translates to a B+ of 315-320V at more than 100 mA.
This transformer is less than $16 from companies like Mouser, even in single quantity. My only concern is whether the lack of a shield might be a problem, especially in a preamp (I want to include a phono stage). Does anyone have any experience using these for this purpose?
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Topic - Inexpensive Power Transformers - Triode_Kingdom 07:41:50 06/10/17 (25)
- RE: Inexpensive Power Transformers - Audio Pete 14:55:17 06/15/17 (0)
- RE: Inexpensive Power Transformers - GeorgePope 05:46:44 06/13/17 (0)
- RE: Inexpensive Power Transformers - Steve O 14:44:25 06/10/17 (0)
- RE: Inexpensive Power Transformers - DAK 08:26:16 06/10/17 (21)
- RE: Inexpensive Power Transformers - vinnie2 15:19:33 06/10/17 (0)
- RE: Inexpensive Power Transformers - Triode_Kingdom 10:00:32 06/10/17 (19)
- Virtual Umbilical... - caffeinator 06:38:14 06/11/17 (2)
- Yes, that's probably what I'll do - Triode_Kingdom 08:54:29 06/11/17 (1)
- RE: Yes, that's probably what I'll do - caffeinator 07:04:27 06/13/17 (0)
- RE: Inexpensive Power Transformers - HoosierAudio 16:30:02 06/10/17 (0)
- " Maybe I should be looking for a toroidal transformer" - 1973shovel 11:33:15 06/10/17 (10)
- RE: " Maybe I should be looking for a toroidal transformer" - dave slagle 04:51:32 06/13/17 (8)
- RE: " Maybe I should be looking for a toroidal transformer" - Triode_Kingdom 19:14:02 06/13/17 (7)
- RE: " Maybe I should be looking for a toroidal transformer" - dave slagle 04:31:13 06/14/17 (3)
- RE: " Maybe I should be looking for a toroidal transformer" - Triode_Kingdom 10:33:37 06/16/17 (2)
- RE: " Maybe I should be looking for a toroidal transformer" - Tom Bavis 19:31:29 06/18/17 (1)
- Thanks Tom, good info! (nt) - Triode_Kingdom 23:03:31 06/19/17 (0)
- RE: " Maybe I should be looking for a toroidal transformer" - mah 04:30:02 06/14/17 (2)
- RE: " Maybe I should be looking for a toroidal transformer" - cpotl 06:24:33 06/14/17 (1)
- RE: " Maybe I should be looking for a toroidal transformer" - dave slagle 08:38:35 06/14/17 (0)
- RE: " Maybe I should be looking for a toroidal transformer" - JKT 15:48:53 06/10/17 (0)
- RE: Inexpensive Power Transformers - DAK 10:08:02 06/10/17 (3)
- RE: Inexpensive Power Transformers - Triode_Kingdom 10:22:02 06/10/17 (2)
- RE: Inexpensive Power Transformers - DAK 11:56:25 06/10/17 (1)
- RE: Inexpensive Power Transformers - Triode_Kingdom 15:26:00 06/10/17 (0)