I went to my favorite surplus place today and saw this pair of transformers.....again and can't figure out if I can use them anywhere.
Looks like parts out of a CD player.
The pic I found was on Pintrest which I hate, I'll see if it'll upload - it's kinda small.
Found a bigger pic, search for Sony CDP-X77ES is what got the bigger pic.
The pic I found was on Pintrest which I hate, I'll see if it'll upload - it's kinda small.
Found a bigger pic, search for Sony CDP-X77ES is what got the bigger pic.
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Or, since they are likely conventional E-I laminated transformers, concealed and nicely shielded in metal cases and probably have suitable output voltages, how about a high quality, dual mono preamp? That might be a cool enough project to be worthwhile 😉
I've thought about Dual mono preamp but 2 things. I have a wonderful preamp and there are a different number of wires going in and going out of each transformer.
Then it's time to identify which is the (likely) AC mains input primary winding. Secondary windings will likely be a mixture of single wound, separate and low voltage windings to power only specific devices like motors, control circuits, microprocessor and DAC as well as power supplies for the preamps other audio circuits.
Search the Sony player schematic(s) and they'll show you what at least some of the windings are for and what voltages to expect from them. For all the readily available details in the CD player's service manual, sign up first for a free download here: Sony CDP-X77ES Compact Disc Player Manual | HiFi Engine
According to the manual, transformer T901 is used for US 120V supplies and T902 is alternately used for 240V (UK etc.). So it looks like only T901 will be of any use to you. Wire it up with a low current mains fuse and test the secondary voltages when you've identified the various secondary winding pairs and (maybe) any tappings, by ohmmeter. It won't provide a lot more current than the CD player required so you'll need to proceed carefully unless you know what the expected current demands and total load could be (see the ID plate for a worst-case estimate). Stay with signal level circuits as you won't be getting much power from this transformer in any case.
Search the Sony player schematic(s) and they'll show you what at least some of the windings are for and what voltages to expect from them. For all the readily available details in the CD player's service manual, sign up first for a free download here: Sony CDP-X77ES Compact Disc Player Manual | HiFi Engine
According to the manual, transformer T901 is used for US 120V supplies and T902 is alternately used for 240V (UK etc.). So it looks like only T901 will be of any use to you. Wire it up with a low current mains fuse and test the secondary voltages when you've identified the various secondary winding pairs and (maybe) any tappings, by ohmmeter. It won't provide a lot more current than the CD player required so you'll need to proceed carefully unless you know what the expected current demands and total load could be (see the ID plate for a worst-case estimate). Stay with signal level circuits as you won't be getting much power from this transformer in any case.
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