![]() |
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
I am planning to build an upgraded PS for my new P-3A. The stock PS is a cheap wall wart unit that appears to consist of a transfromer only in sealed plastic, rated to provide 9V AC and 2A. The rectification and filtering take place inside the DAC...not sure exactly why that was, but I will proceed as is for now.I have ordered a toroidal transformer from Digikey rated for 9V AC and 2.75A. My intent is to simply install the new transformer in a prototype box, install a filtered IEC socket and ferrite beads on the secondary wires inside the box. I will install a shielded twisted pair wire, terminated in the appropriate female plug for connection to the DAC.
Now obviously, I will bench test the new PS vs. the stock one to make sure that I AM truly getting 9V AC just like the stock PS.
Question: Is a toroidal xformer a good choice for this app.? I also considered the Signal split bobbin transformers, but I couldn't find one that could be configured for 9V, so I settled for what I could find in the digikey catalog. For the $18 invested in the transformer, I figure it is a worthwhile venture. If it works out well, the total parts cost for the venture will not exceed $40.
My guess is that the transformer that they provide in the PS for the stock unit is inexpensive and thus keeps their price for the DAC down. I don't begrudge them that, it is a GREAT DAC.
Comments? Recommendations? Warnings? Any would be appreciated.
Take care,
Dan W.
This post is made possible by the generous support of people like you and our sponsors:
Topic - Upgraded PS for P-3A...Need Feedback. - Dan W 13:37:14 09/20/00 (9)
- Re: Upgraded PS for P-3A...Need Feedback. - Lesha 02:26:49 09/21/00 (6)
- Re: Upgraded PS for P-3A...Need Feedback. - Dan W 10:49:20 09/21/00 (5)
- Re: Upgraded PS for P-3A...Need Feedback. - Lesha 03:58:55 09/22/00 (4)
- Re: Upgraded PS for P-3A...Need Feedback. - Dan W 07:59:42 09/22/00 (3)
- Re: Upgraded PS for P-3A...Need Feedback. - Lesha 10:02:27 09/22/00 (2)
- Re: Upgraded PS for P-3A...Need Feedback. - Dan W 11:26:01 09/22/00 (1)
- Re: Upgraded PS for P-3A...Need Feedback. - Lesha 03:34:41 09/23/00 (0)
- Re: Upgraded PS for P-3A...Need Feedback. - elan120 16:49:28 09/20/00 (1)
- Interested in details for JISCO PS - JDH 06:47:56 09/21/00 (0)