Only $15 and you will know for sure. Big danger from PCB oil is
repeated exposure over a period of time, or worse, breathing smoke from
burning PCB oil.
Many older dental X-Ray transformers were 70 KV @ 7-10 mA. Ive seen
some that were 100 KV @ a few mA. These must be in oil to use them,
otherwise you will burn them up. Find a suitable WATERPROOF electrical
box, mount the xfmr, bring out the leeds using electrical grade RTV
silicone ($$) that has no acetic acid. Install a 3/16 nipple in the top
cover so that is not below the level of the oil. Buy or borrow a
MITYVAC hand held vacuum pump. Connect the pump to the nipple & draw 25
- 30 inches of vacuum. Leave it for 24-48 hours. Check & maintain 25 -
30 inches of vacuum. You want to get rid of any air bubbles in the
secondary winding.
If you're drawing arcs with these, you will need to current limit the
primary. A 500 foot roll of #12 THHN from home depot or ebay works
fine. Have fun & be safe.
Bob
AKA Sparky99
On 7/5/2016 9:35 AM, Buds mohrstamping mail wrote:
Hi all, Got a dental x ray transformer given to me this past weekend. Mfg’d by Ritter Dental MFG co. inc. Rochester NY. Does anyone know anything about this unit? PCB’s maybe!? voltage? Unit only has primary tap info on it. Any help would be appreciated.
Forrest Mohrman
Engineer
bud@xxxxxxxxxxxxxxxx || 440.647.4316
www.mohrstamping.com
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