120V heater pad: Difference between revisions
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*This bulb is T3 R7S, 118 mm long - [https://www.bulbs.com/product/Q500T3-CL-240V] | *This bulb is T3 R7S, 118 mm long - [https://www.bulbs.com/product/Q500T3-CL-240V] | ||
*1500/375W 240/120v - [https://www.amazon.com/GE-Lighting-24932-Proline-1500-Watt/dp/B000C13XI8/ref=sr_1_12?dchild=1&keywords=240V%2Bhalogen%2Bbulb&qid=1615771059&s=hi&sr=1-12&th=1] | *1500/375W 240/120v - [https://www.amazon.com/GE-Lighting-24932-Proline-1500-Watt/dp/B000C13XI8/ref=sr_1_12?dchild=1&keywords=240V%2Bhalogen%2Bbulb&qid=1615771059&s=hi&sr=1-12&th=1] | ||
*Or use 2 120V 500W in series, more even bed heating, using 2 bulb holders - [https://www.amazon.com/gp/product/B07B2HNB1C/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1] | |||
Revision as of 02:04, 15 March 2021
Pad
Resistors
- Use resistors instead - [4]
Halogen As Heater
- Halogens are about 85% heaters.
- For 3D printers, use a 240V bulb, run it at 1/4 power with 120V (P~I^2R) so it doesn't burn out with on-off cycling - by running it only at a fraction of its rated power.
- Use a holder - 4.69 or 4-11/16" holder, for a 240V T3 bulb. [5]
- R7S is the style of holder -[6]
- This bulb is T3 R7S, 118 mm long - [7]
- 1500/375W 240/120v - [8]
- Or use 2 120V 500W in series, more even bed heating, using 2 bulb holders - [9]