Power supply for Radiola 111

7/20/2005 12:09:01 PMTom

i would like to make a power supply for a Radiola 111. It will only be used for this radio so I only need 1.5v (A), 20v and 40v (B) and 1.5v (C). I have rebased 1A5 tubes to replace the WD11 tubes.I have many transformers that I can use but the output is like 270volts c.t. or higher, 6volts and 5volts. What is the best way to drop these outputs to the needed voltage? should I use large wattage resistors accross the rectified outputs or zener diodes? If I should use the diodes how would I do it? What about bypass caps to keep hum and buzz out? Where should I install them?
Thanks for the help, Tom

7/20/2005 4:30:43 PMNorm Leal

Hi Tom

For the "A", filament, supply use a small 6.3 volt filament transformer. Rectify, filter and use a LM317 to regulate voltage.

For the "B" voltages use an isolation transformer. Use a diode, filters and resistors to drop voltage. Detector voltage should be around 20 but second stage can be much higher. With around 90 volts a Radiola lll will operate a speaker.

Check out transformer G13510 at www.goldmine-elec.com . Only $2.49 and it has two primary windings. (One can be used as primary & other isolation secondary.) Also has 2 - 6.3 volt windings. You can use 1 for "A", filament & the second can be for "C" voltage.

I can send basic information if you list your email address.

Check to be sure the audio interstage transformer isn't open.

Norm

:i would like to make a power supply for a Radiola 111. It will only be used for this radio so I only need 1.5v (A), 20v and 40v (B) and 1.5v (C). I have rebased 1A5 tubes to replace the WD11 tubes.I have many transformers that I can use but the output is like 270volts c.t. or higher, 6volts and 5volts. What is the best way to drop these outputs to the needed voltage? should I use large wattage resistors accross the rectified outputs or zener diodes? If I should use the diodes how would I do it? What about bypass caps to keep hum and buzz out? Where should I install them?
:Thanks for the help, Tom

7/21/2005 7:02:32 AMTom

:Hi Tom
:
: For the "A", filament, supply use a small 6.3 volt filament transformer. Rectify, filter and use a LM317 to regulate voltage.
:
: For the "B" voltages use an isolation transformer. Use a diode, filters and resistors to drop voltage. Detector voltage should be around 20 but second stage can be much higher. With around 90 volts a Radiola lll will operate a speaker.
:
: Check out transformer G13510 at www.goldmine-elec.com . Only $2.49 and it has two primary windings. (One can be used as primary & other isolation secondary.) Also has 2 - 6.3 volt windings. You can use 1 for "A", filament & the second can be for "C" voltage.
:
: I can send basic information if you list your email address.
:
: Check to be sure the audio interstage transformer isn't open.
:
:Norm
:
::i would like to make a power supply for a Radiola 111. It will only be used for this radio so I only need 1.5v (A), 20v and 40v (B) and 1.5v (C). I have rebased 1A5 tubes to replace the WD11 tubes.I have many transformers that I can use but the output is like 270volts c.t. or higher, 6volts and 5volts. What is the best way to drop these outputs to the needed voltage? should I use large wattage resistors accross the rectified outputs or zener diodes? If I should use the diodes how would I do it? What about bypass caps to keep hum and buzz out? Where should I install them?
::Thanks for the help, Tom

7/21/2005 7:07:35 AMTom

::Hi Tom
::
:: For the "A", filament, supply use a small 6.3 volt filament transformer. Rectify, filter and use a LM317 to regulate voltage.
::
:: For the "B" voltages use an isolation transformer. Use a diode, filters and resistors to drop voltage. Detector voltage should be around 20 but second stage can be much higher. With around 90 volts a Radiola lll will operate a speaker.
::
:: Check out transformer G13510 at www.goldmine-elec.com . Only $2.49 and it has two primary windings. (One can be used as primary & other isolation secondary.) Also has 2 - 6.3 volt windings. You can use 1 for "A", filament & the second can be for "C" voltage.
::
:: I can send basic information if you list your email address.
::
:: Check to be sure the audio interstage transformer isn't open.
::
::Norm
::
:::i would like to make a power supply for a Radiola 111. It will only be used for this radio so I only need 1.5v (A), 20v and 40v (B) and 1.5v (C). I have rebased 1A5 tubes to replace the WD11 tubes.I have many transformers that I can use but the output is like 270volts c.t. or higher, 6volts and 5volts. What is the best way to drop these outputs to the needed voltage? should I use large wattage resistors accross the rectified outputs or zener diodes? If I should use the diodes how would I do it? What about bypass caps to keep hum and buzz out? Where should I install them?
:::Thanks for the help, Tom

Norm,Thanks for the help, My e-mail is tkelly1@wsscwater.com I will look into the transformer you talked about, I would also like some more info on bypass caps to keep the noise down. also can I get that LM317 regulator from Radio Shack?
Thanks again, Tom

7/21/2005 7:38:07 PMNorm Leal

Hi Tom

Information sent.

Norm

:::Hi Tom
:::
::: For the "A", filament, supply use a small 6.3 volt filament transformer. Rectify, filter and use a LM317 to regulate voltage.
:::
::: For the "B" voltages use an isolation transformer. Use a diode, filters and resistors to drop voltage. Detector voltage should be around 20 but second stage can be much higher. With around 90 volts a Radiola lll will operate a speaker.
:::
::: Check out transformer G13510 at www.goldmine-elec.com . Only $2.49 and it has two primary windings. (One can be used as primary & other isolation secondary.) Also has 2 - 6.3 volt windings. You can use 1 for "A", filament & the second can be for "C" voltage.
:::
::: I can send basic information if you list your email address.
:::
::: Check to be sure the audio interstage transformer isn't open.
:::
:::Norm
:::
::::i would like to make a power supply for a Radiola 111. It will only be used for this radio so I only need 1.5v (A), 20v and 40v (B) and 1.5v (C). I have rebased 1A5 tubes to replace the WD11 tubes.I have many transformers that I can use but the output is like 270volts c.t. or higher, 6volts and 5volts. What is the best way to drop these outputs to the needed voltage? should I use large wattage resistors accross the rectified outputs or zener diodes? If I should use the diodes how would I do it? What about bypass caps to keep hum and buzz out? Where should I install them?
::::Thanks for the help, Tom
:
:Norm,Thanks for the help, My e-mail is tkelly1@wsscwater.com I will look into the transformer you talked about, I would also like some more info on bypass caps to keep the noise down. also can I get that LM317 regulator from Radio Shack?
:Thanks again, Tom

7/22/2005 6:43:54 AMTom

Norm, I did not receive the information you sent. I hope there was not a mix up with the e-mail address, could you please try again?
Thanks,
Tom
tkelly1@wsscwater.com

:Hi Tom

:
: Information sent.
:
:Norm
:
::::Hi Tom
::::
:::: For the "A", filament, supply use a small 6.3 volt filament transformer. Rectify, filter and use a LM317 to regulate voltage.
::::
:::: For the "B" voltages use an isolation transformer. Use a diode, filters and resistors to drop voltage. Detector voltage should be around 20 but second stage can be much higher. With around 90 volts a Radiola lll will operate a speaker.
::::
:::: Check out transformer G13510 at www.goldmine-elec.com . Only $2.49 and it has two primary windings. (One can be used as primary & other isolation secondary.) Also has 2 - 6.3 volt windings. You can use 1 for "A", filament & the second can be for "C" voltage.
::::
:::: I can send basic information if you list your email address.
::::
:::: Check to be sure the audio interstage transformer isn't open.
::::
::::Norm
::::
:::::i would like to make a power supply for a Radiola 111. It will only be used for this radio so I only need 1.5v (A), 20v and 40v (B) and 1.5v (C). I have rebased 1A5 tubes to replace the WD11 tubes.I have many transformers that I can use but the output is like 270volts c.t. or higher, 6volts and 5volts. What is the best way to drop these outputs to the needed voltage? should I use large wattage resistors accross the rectified outputs or zener diodes? If I should use the diodes how would I do it? What about bypass caps to keep hum and buzz out? Where should I install them?
:::::Thanks for the help, Tom
::
::Norm,Thanks for the help, My e-mail is tkelly1@wsscwater.com I will look into the transformer you talked about, I would also like some more info on bypass caps to keep the noise down. also can I get that LM317 regulator from Radio Shack?
::Thanks again, Tom

7/21/2005 9:34:57 PMMarv Nuce

Tom,
The LM317 is a generic 3 terminal adjustable (with resistor combinations) voltage regulator, and should be available at Radio Shack. In Google, type in the part number, then go to any site listing a .pdf document for a complete data sheet.
marv

:::Hi Tom
:::
::: For the "A", filament, supply use a small 6.3 volt filament transformer. Rectify, filter and use a LM317 to regulate voltage.
:::
::: For the "B" voltages use an isolation transformer. Use a diode, filters and resistors to drop voltage. Detector voltage should be around 20 but second stage can be much higher. With around 90 volts a Radiola lll will operate a speaker.
:::
::: Check out transformer G13510 at www.goldmine-elec.com . Only $2.49 and it has two primary windings. (One can be used as primary & other isolation secondary.) Also has 2 - 6.3 volt windings. You can use 1 for "A", filament & the second can be for "C" voltage.
:::
::: I can send basic information if you list your email address.
:::
::: Check to be sure the audio interstage transformer isn't open.
:::
:::Norm
:::
::::i would like to make a power supply for a Radiola 111. It will only be used for this radio so I only need 1.5v (A), 20v and 40v (B) and 1.5v (C). I have rebased 1A5 tubes to replace the WD11 tubes.I have many transformers that I can use but the output is like 270volts c.t. or higher, 6volts and 5volts. What is the best way to drop these outputs to the needed voltage? should I use large wattage resistors accross the rectified outputs or zener diodes? If I should use the diodes how would I do it? What about bypass caps to keep hum and buzz out? Where should I install them?
::::Thanks for the help, Tom
:
:Norm,Thanks for the help, My e-mail is tkelly1@wsscwater.com I will look into the transformer you talked about, I would also like some more info on bypass caps to keep the noise down. also can I get that LM317 regulator from Radio Shack?
:Thanks again, Tom

1/28/2006 1:04:17 AM

:Tom,
:The LM317 is a generic 3 terminal adjustable (with resistor combinations) voltage regulator, and should be available at Radio Shack. In Google, type in the part number, then go to any site listing a .pdf document for a complete data sheet.
:marv
:
::::Hi Tom
::::
:::: For the "A", filament, supply use a small 6.3 volt filament transformer. Rectify, filter and use a LM317 to regulate voltage.
::::
:::: For the "B" voltages use an isolation transformer. Use a diode, filters and resistors to drop voltage. Detector voltage should be around 20 but second stage can be much higher. With around 90 volts a Radiola lll will operate a speaker.
::::
:::: Check out transformer G13510 at www.goldmine-elec.com . Only $2.49 and it has two primary windings. (One can be used as primary & other isolation secondary.) Also has 2 - 6.3 volt windings. You can use 1 for "A", filament & the second can be for "C" voltage.
::::
:::: I can send basic information if you list your email address.
::::
:::: Check to be sure the audio interstage transformer isn't open.
::::
::::Norm
::::
:::::i would like to make a power supply for a Radiola 111. It will only be used for this radio so I only need 1.5v (A), 20v and 40v (B) and 1.5v (C). I have rebased 1A5 tubes to replace the WD11 tubes.I have many transformers that I can use but the output is like 270volts c.t. or higher, 6volts and 5volts. What is the best way to drop these outputs to the needed voltage? should I use large wattage resistors accross the rectified outputs or zener diodes? If I should use the diodes how would I do it? What about bypass caps to keep hum and buzz out? Where should I install them?
:::::Thanks for the help, Tom
::
::Norm,Thanks for the help, My e-mail is tkelly1@wsscwater.com I will look into the transformer you talked about, I would also like some more info on bypass caps to keep the noise down. also can I get that LM317 regulator from Radio Shack?
::Thanks again, Tom

1/28/2006 12:58:53 AM

::Hi Tom
::
:: For the "A", filament, supply use a small 6.3 volt filament transformer. Rectify, filter and use a LM317 to regulate voltage.
::
:: For the "B" voltages use an isolation transformer. Use a diode, filters and resistors to drop voltage. Detector voltage should be around 20 but second stage can be much higher. With around 90 volts a Radiola lll will operate a speaker.
::
:: Check out transformer G13510 at www.goldmine-elec.com . Only $2.49 and it has two primary windings. (One can be used as primary & other isolation secondary.) Also has 2 - 6.3 volt windings. You can use 1 for "A", filament & the second can be for "C" voltage.
::
:: I can send basic information if you list your email address.
::
:: Check to be sure the audio interstage transformer isn't open.
::
::Norm
::
:::i would like to make a power supply for a Radiola 111. It will only be used for this radio so I only need 1.5v (A), 20v and 40v (B) and 1.5v (C). I have rebased 1A5 tubes to replace the WD11 tubes.I have many transformers that I can use but the output is like 270volts c.t. or higher, 6volts and 5volts. What is the best way to drop these outputs to the needed voltage? should I use large wattage resistors accross the rectified outputs or zener diodes? If I should use the diodes how would I do it? What about bypass caps to keep hum and buzz out? Where should I install them?
:::Thanks for the help, Tom

1/28/2006 1:00:10 AM

:::Hi Tom
:::
::: For the "A", filament, supply use a small 6.3 volt filament transformer. Rectify, filter and use a LM317 to regulate voltage.
:::
::: For the "B" voltages use an isolation transformer. Use a diode, filters and resistors to drop voltage. Detector voltage should be around 20 but second stage can be much higher. With around 90 volts a Radiola lll will operate a speaker.
:::
::: Check out transformer G13510 at www.goldmine-elec.com . Only $2.49 and it has two primary windings. (One can be used as primary & other isolation secondary.) Also has 2 - 6.3 volt windings. You can use 1 for "A", filament & the second can be for "C" voltage.
:::
::: I can send basic information if you list your email address.
:::
::: Check to be sure the audio interstage transformer isn't open.
:::
:::Norm
:::
::::i would like to make a power supply for a Radiola 111. It will only be used for this radio so I only need 1.5v (A), 20v and 40v (B) and 1.5v (C). I have rebased 1A5 tubes to replace the WD11 tubes.I have many transformers that I can use but the output is like 270volts c.t. or higher, 6volts and 5volts. What is the best way to drop these outputs to the needed voltage? should I use large wattage resistors accross the rectified outputs or zener diodes? If I should use the diodes how would I do it? What about bypass caps to keep hum and buzz out? Where should I install them?
::::Thanks for the help, Tom

1/28/2006 1:01:06 AM

:i would like to make a power supply for a Radiola 111. It will only be used for this radio so I only need 1.5v (A), 20v and 40v (B) and 1.5v (C). I have rebased 1A5 tubes to replace the WD11 tubes.I have many transformers that I can use but the output is like 270volts c.t. or higher, 6volts and 5volts. What is the best way to drop these outputs to the needed voltage? should I use large wattage resistors accross the rectified outputs or zener diodes? If I should use the diodes how would I do it? What about bypass caps to keep hum and buzz out? Where should I install them?
:Thanks for the help, Tom