08-20-2011, 08:15 PM
Hi
Perhaps it will help if you have the specifications of the original:
High voltage secondary - 700 volts center-tapped (VCT), 135 mA
Filaments - 6.3 volts center-tapped, 3.5 amps
Rectifier filament - 5 volts, 2 amps
A Hammond HX-273BX will be an excellent replacement for the original. The Hammond is a vertical mounting transformer like the original, and it has higher current capacity than the original. Pricey at $78.06 from Radio Daze, but still cheaper than a Heyboer custom-made transformer.
This is why an old radio should never be plugged in until it has been thoroughly checked out for trouble such as bad electrolytic capacitors (and 75+ year old electrolytics are usually bad). The consequences of plugging in an old radio can be costly!
http://www.philcoradio.com/tech/plugin.htm
http://www.antiqueradio.org/powerup.htm
Oh, and Edcor Electronics also offers what looks like another good choice as a replacement, with plenty of reserve current capacity and cheaper ($60.95) than the Hammond:
http://www.edcorusa.com/products/820-xpwr179_120.aspx
I think the Edcor would be the better choice, as its primary is designed for 120 volts while the Hammond primary is designed for 115. With today's higher line voltages, 115 is really too low these days as running that transformer at 125 volts will result in higher than published secondary voltages.
Perhaps it will help if you have the specifications of the original:
High voltage secondary - 700 volts center-tapped (VCT), 135 mA
Filaments - 6.3 volts center-tapped, 3.5 amps
Rectifier filament - 5 volts, 2 amps
A Hammond HX-273BX will be an excellent replacement for the original. The Hammond is a vertical mounting transformer like the original, and it has higher current capacity than the original. Pricey at $78.06 from Radio Daze, but still cheaper than a Heyboer custom-made transformer.
This is why an old radio should never be plugged in until it has been thoroughly checked out for trouble such as bad electrolytic capacitors (and 75+ year old electrolytics are usually bad). The consequences of plugging in an old radio can be costly!
http://www.philcoradio.com/tech/plugin.htm
http://www.antiqueradio.org/powerup.htm
Oh, and Edcor Electronics also offers what looks like another good choice as a replacement, with plenty of reserve current capacity and cheaper ($60.95) than the Hammond:
http://www.edcorusa.com/products/820-xpwr179_120.aspx
I think the Edcor would be the better choice, as its primary is designed for 120 volts while the Hammond primary is designed for 115. With today's higher line voltages, 115 is really too low these days as running that transformer at 125 volts will result in higher than published secondary voltages.
--
Ron Ramirez
Ferdinand IN
