February 6, 2021 at 11:28 am #16204Joseph SkrypkaCVRS Member
Does anyone have a schematic for a simple B Battery eliminator? I have a couple of old battery powered radios to restore and would like to eliminate the need for batteries.
JoeFebruary 6, 2021 at 1:37 pm #16208garykusterCVRS Member
I don’t have a schematic, but this transformer would be a good start. perhaps it can be found cheaper.February 6, 2021 at 4:29 pm #16216
I have attached a JPG schematic of a simple B+ power supply.
Hope this helps.
Attachments:February 6, 2021 at 4:36 pm #16218
Hi Joseph and others.
I have attached a 81 page PDF of connection diagrams for connecting vintage battery radios, it is used with a ARBE-III universal Battery Eliminator which I use.
Attachments:February 7, 2021 at 6:54 am #16222Jean MarcotteForum Participant
When using Bruce’s simple schematic, use a polarized plug with B- wired to the neutral side to avoid a live chassis.February 7, 2021 at 11:48 am #16224
I just wanted to clarify, the schematic I posted was from the internet. I did not intend to take credit for it. I tried numerous times to upload the website with it on but to no avail. The schematic came form;
Phil’s Old Radios: Home: Building
BruceFebruary 7, 2021 at 3:35 pm #16225John GreenlandCVRS Member
I have attached a very simple and inexpensive possible solution to your battery eliminator issue for the higher voltage. A couple of “D” cells will probably do for the filaments.
It requires 3 HP printer power supplies. I have found numerous type and power ratings at a local thrift store for 3 to 4 dollars ( Canadian) each.
They have 2 output voltages, 32 volts and 16 volts.
You need the ones with a 2 wire line cord. The three wire ones have the 0 volt wire (A) connected to the AC ground pin on the supply.
If you wire them as shown they will give you your high voltage. The diodes are optional and will lower your voltage slightly.
I have used 4 of them in series (without the diodes) to power a 40 watt incandescent light bulb as a test without a problem
Attachments:February 10, 2021 at 4:37 pm #16235Grant SesakCVRS MemberFebruary 14, 2021 at 3:27 am #16254Joseph SkrypkaCVRS Member
Thanks to all. For some reason, I’m not being notified of my messages, so I have not checked the site since last weekend.
I’ll work through all of the responses today!
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