I have a Yale BP-135 Automatic B - Battery Eliminator. The unit functions but the posts do not put out the correct voltages. There are 4 wire wound resistors inside. I believe they are the problem. Does anyone have info on this set or know the resistor values? I have been unable to find anything on this set. Any help would be appreciated.
Thanks,
Paul

Hi Paul

Bosch made a battery eliminator. The schematic is in Rider. Click on the schematic to get a larger copy. Didn't find Yale.

http://www.nostalgiaair.org/Riders/showinfo.asp?PATH=UAB&IMG=_UAB_1-1.gif&INF=BAN%20%20PWR%2E%20%20UNITS

If your resistors are wire wound they should be ok unless open. Filter capacitors should be replaced. The rectifier may also be weak. These supplies usually had 80 or BH tubes.

Norm

:I have a Yale BP-135 Automatic B - Battery Eliminator. The unit functions but the posts do not put out the correct voltages. There are 4 wire wound resistors inside. I believe they are the problem. Does anyone have info on this set or know the resistor values? I have been unable to find anything on this set. Any help would be appreciated.
:Thanks,
:Paul

:Hi Paul
:
: Bosch made a battery eliminator. The schematic is in Rider. Click on the schematic to get a larger copy. Didn't find Yale.
:
:http://www.nostalgiaair.org/Riders/showinfo.asp?PATH=UAB&IMG=_UAB_1-1.gif&INF=BAN%20%20PWR%2E%20%20UNITS
:
: If your resistors are wire wound they should be ok unless open. Filter capacitors should be replaced. The rectifier may also be weak. These supplies usually had 80 or BH tubes.
:
:Norm
:
:
:
::I have a Yale BP-135 Automatic B - Battery Eliminator. The unit functions but the posts do not put out the correct voltages. There are 4 wire wound resistors inside. I believe they are the problem. Does anyone have info on this set or know the resistor values? I have been unable to find anything on this set. Any help would be appreciated.
::Thanks,
::Paul

Thanks for the info Norm. The Bosch battery eliminators did not match the yale. I found that two of the four wire wound resistors were open. The 135 volt tap has no resistor, the 90Volt tap has a 8k ohm resistor, the 67 1/2 volt tap has 10k ohm rsistor, the 45V tap has an open resistor and the last resistor has no tap associated with it but is also open (may be for the supply because the other three share the same source voltage. You are right about changing the filter caps. I need the correct info for the unit to determine the values etc. Any other ideas or info sources would be much appreciated.
Thanks for your assistance.

Paul

:Hi Paul
:
: Bosch made a battery eliminator. The schematic is in Rider. Click on the schematic to get a larger copy. Didn't find Yale.
:
:http://www.nostalgiaair.org/Riders/showinfo.asp?PATH=UAB&IMG=_UAB_1-1.gif&INF=BAN%20%20PWR%2E%20%20UNITS
:
: If your resistors are wire wound they should be ok unless open. Filter capacitors should be replaced. The rectifier may also be weak. These supplies usually had 80 or BH tubes.
:
:Norm
:
:
:
::I have a Yale BP-135 Automatic B - Battery Eliminator. The unit functions but the posts do not put out the correct voltages. There are 4 wire wound resistors inside. I believe they are the problem. Does anyone have info on this set or know the resistor values? I have been unable to find anything on this set. Any help would be appreciated.
::Thanks,
::Paul

Hi Paul, I don't have any information on Yale supplies but you might be able to repair it anyway. I assume they're wire wound resistors and will probably only have one or two breaks in each one. Examine them carefully to try and find where the break is. If they have an insulated coating you might have to dig / scrape through it. It could be open at the end where the resistance wire connects to the terminal. Where there's a tap you can find which half is open. Then try and measure the resistance of the two halves from each side of the break to the end terminal. Where there's a tap you can measure the good half. The total resistance should be proportional to the winding length, i.e. if the good end is 1" long and measures 6k and the total length is 3" then the total resistance will be about 18 k. Hopefully you can get wilthin 20% accuracy (or better) and that should be close enough to get it working. Is there any label that indicates where it was made? A lot of Canadian stuff made its way into the US, often when people migrated. Maybe Ed can throw some light on it if it's Canadian. What sort of rectifier does it use?
Don Black.

:Thanks for the info Norm. The Bosch battery eliminators did not match the yale. I found that two of the four wire wound resistors were open. The 135 volt tap has no resistor, the 90Volt tap has a 8k ohm resistor, the 67 1/2 volt tap has 10k ohm rsistor, the 45V tap has an open resistor and the last resistor has no tap associated with it but is also open (may be for the supply because the other three share the same source voltage. You are right about changing the filter caps. I need the correct info for the unit to determine the values etc. Any other ideas or info sources would be much appreciated.
:Thanks for your assistance.
:
:Paul
:
::Hi Paul
::
:: Bosch made a battery eliminator. The schematic is in Rider. Click on the schematic to get a larger copy. Didn't find Yale.
::
::http://www.nostalgiaair.org/Riders/showinfo.asp?PATH=UAB&IMG=_UAB_1-1.gif&INF=BAN%20%20PWR%2E%20%20UNITS
::
:: If your resistors are wire wound they should be ok unless open. Filter capacitors should be replaced. The rectifier may also be weak. These supplies usually had 80 or BH tubes.
::
::Norm
::
::
::
:::I have a Yale BP-135 Automatic B - Battery Eliminator. The unit functions but the posts do not put out the correct voltages. There are 4 wire wound resistors inside. I believe they are the problem. Does anyone have info on this set or know the resistor values? I have been unable to find anything on this set. Any help would be appreciated.
:::Thanks,
:::Paul

Thanks for the info Don. I measured as you described and I believe I have the correct values now. They are El Menco Hy Watt resistors and the values had been worn off or faded. I am not sure of the wattage however. The unit does use the Raytheon BH tube also. I'll see if I can buy replacement resistors and try it out. Thanks for your help
Paul
:Hi Paul, I don't have any information on Yale supplies but you might be able to repair it anyway. I assume they're wire wound resistors and will probably only have one or two breaks in each one. Examine them carefully to try and find where the break is. If they have an insulated coating you might have to dig / scrape through it. It could be open at the end where the resistance wire connects to the terminal. Where there's a tap you can find which half is open. Then try and measure the resistance of the two halves from each side of the break to the end terminal. Where there's a tap you can measure the good half. The total resistance should be proportional to the winding length, i.e. if the good end is 1" long and measures 6k and the total length is 3" then the total resistance will be about 18 k. Hopefully you can get wilthin 20% accuracy (or better) and that should be close enough to get it working. Is there any label that indicates where it was made? A lot of Canadian stuff made its way into the US, often when people migrated. Maybe Ed can throw some light on it if it's Canadian. What sort of rectifier does it use?
:Don Black.
:
::Thanks for the info Norm. The Bosch battery eliminators did not match the yale. I found that two of the four wire wound resistors were open. The 135 volt tap has no resistor, the 90Volt tap has a 8k ohm resistor, the 67 1/2 volt tap has 10k ohm rsistor, the 45V tap has an open resistor and the last resistor has no tap associated with it but is also open (may be for the supply because the other three share the same source voltage. You are right about changing the filter caps. I need the correct info for the unit to determine the values etc. Any other ideas or info sources would be much appreciated.
::Thanks for your assistance.
::
::Paul
::
:::Hi Paul
:::
::: Bosch made a battery eliminator. The schematic is in Rider. Click on the schematic to get a larger copy. Didn't find Yale.
:::
:::http://www.nostalgiaair.org/Riders/showinfo.asp?PATH=UAB&IMG=_UAB_1-1.gif&INF=BAN%20%20PWR%2E%20%20UNITS
:::
::: If your resistors are wire wound they should be ok unless open. Filter capacitors should be replaced. The rectifier may also be weak. These supplies usually had 80 or BH tubes.
:::
:::Norm
:::
:::
:::
::::I have a Yale BP-135 Automatic B - Battery Eliminator. The unit functions but the posts do not put out the correct voltages. There are 4 wire wound resistors inside. I believe they are the problem. Does anyone have info on this set or know the resistor values? I have been unable to find anything on this set. Any help would be appreciated.
::::Thanks,
::::Paul

Hi,
I have a generic Raytheon circuit that they included with their BH tubes on my website:
http://Art_Deco_era_radios.tripod.com/main.html
I also have a couple diagrams and links to similar power suppplies if you follow go to the "Farm Radios" page.

The caps will be low values, on the order of 2 Mfd, especially if there is a heavy choke in the unit. Replacing them with new capacitors of the same size will usually yield higher voltages overall.

I use Digi-key for caps. www.digikey.com

:Thanks for the info Norm. The Bosch battery eliminators did not match the yale. I found that two of the four wire wound resistors were open. The 135 volt tap has no resistor, the 90Volt tap has a 8k ohm resistor, the 67 1/2 volt tap has 10k ohm rsistor, the 45V tap has an open resistor and the last resistor has no tap associated with it but is also open (may be for the supply because the other three share the same source voltage. You are right about changing the filter caps. I need the correct info for the unit to determine the values etc. Any other ideas or info sources would be much appreciated.
:Thanks for your assistance.
:
:Paul
:
::Hi Paul
::
:: Bosch made a battery eliminator. The schematic is in Rider. Click on the schematic to get a larger copy. Didn't find Yale.
::
::http://www.nostalgiaair.org/Riders/showinfo.asp?PATH=UAB&IMG=_UAB_1-1.gif&INF=BAN%20%20PWR%2E%20%20UNITS
::
:: If your resistors are wire wound they should be ok unless open. Filter capacitors should be replaced. The rectifier may also be weak. These supplies usually had 80 or BH tubes.
::
::Norm
::
::
::
:::I have a Yale BP-135 Automatic B - Battery Eliminator. The unit functions but the posts do not put out the correct voltages. There are 4 wire wound resistors inside. I believe they are the problem. Does anyone have info on this set or know the resistor values? I have been unable to find anything on this set. Any help would be appreciated.
:::Thanks,
:::Paul