I have a Majestic 8JL885. There is a loud hum when the radio is turned on and it is not present when the phonograph is on. I am going to replace the wires that I can see insulation falling off, but I was wondering is someone might know if this problem may be tube issue or not. Thanks in advace for any response I might get.

Hi Eric

Loud hum is usually caused by bad electrolytic filter caps. I'm surprised that it's not present when the phonograph is on?

Norm

:I have a Majestic 8JL885. There is a loud hum when the radio is turned on and it is not present when the phonograph is on. I am going to replace the wires that I can see insulation falling off, but I was wondering is someone might know if this problem may be tube issue or not. Thanks in advace for any response I might get.

Thank you Norm for the reply. I was a bit confused by the lack of hum with the phonograph too. I found the schematic here and I have a little electronics experience but I only have a multimeter to poke around with. I'll replace the wires just because the some of the conductors are exposed and then check on replacing the caps. Thanks again for the reply.

:Hi Eric
:
: Loud hum is usually caused by bad electrolytic filter caps. I'm surprised that it's not present when the phonograph is on?
:
:Norm
:
::I have a Majestic 8JL885. There is a loud hum when the radio is turned on and it is not present when the phonograph is on. I am going to replace the wires that I can see insulation falling off, but I was wondering is someone might know if this problem may be tube issue or not. Thanks in advace for any response I might get.

Hi Eric

Does this radio use a loop antenna? Is it connected? Are there shielded wires where the outside may not be grounded?

Norm

:Thank you Norm for the reply. I was a bit confused by the lack of hum with the phonograph too. I found the schematic here and I have a little electronics experience but I only have a multimeter to poke around with. I'll replace the wires just because the some of the conductors are exposed and then check on replacing the caps. Thanks again for the reply.
:
::Hi Eric
::
:: Loud hum is usually caused by bad electrolytic filter caps. I'm surprised that it's not present when the phonograph is on?
::
::Norm
::
:::I have a Majestic 8JL885. There is a loud hum when the radio is turned on and it is not present when the phonograph is on. I am going to replace the wires that I can see insulation falling off, but I was wondering is someone might know if this problem may be tube issue or not. Thanks in advace for any response I might get.

Hello Norm,

There is an antenna that is on the inside wall of the cabinet. I think it is connected but haven't really checked. The radio is actually my Grandpa's and it's a little project we are looking at. He just told me that the hum started after he replaced the power transformer many years ago. He thinks he still has the old txfmr and we can dblchk the part numbers.

Regards,
Eric

:Hi Eric
:
: Does this radio use a loop antenna? Is it connected? Are there shielded wires where the outside may not be grounded?
:
:Norm
:
::Thank you Norm for the reply. I was a bit confused by the lack of hum with the phonograph too. I found the schematic here and I have a little electronics experience but I only have a multimeter to poke around with. I'll replace the wires just because the some of the conductors are exposed and then check on replacing the caps. Thanks again for the reply.
::
:::Hi Eric
:::
::: Loud hum is usually caused by bad electrolytic filter caps. I'm surprised that it's not present when the phonograph is on?
:::
:::Norm
:::
::::I have a Majestic 8JL885. There is a loud hum when the radio is turned on and it is not present when the phonograph is on. I am going to replace the wires that I can see insulation falling off, but I was wondering is someone might know if this problem may be tube issue or not. Thanks in advace for any response I might get.

Hi Norm if you're out there...

I replaced that old wire which I mentioned awhile back which ended up being a speaker wire. I was looking to replace the filter cap, but I was unsure what to look for... it is electrolytic axial and on one end it has two leads. It is 16mfd /450v and I'm not finding it to easy. Also the schematics show two, but I only found one in the set. Would you know what I'm looking for?

Thanks in advance.
Eric

:Hello Norm,
:
:There is an antenna that is on the inside wall of the cabinet. I think it is connected but haven't really checked. The radio is actually my Grandpa's and it's a little project we are looking at. He just told me that the hum started after he replaced the power transformer many years ago. He thinks he still has the old txfmr and we can dblchk the part numbers.
:
:Regards,
:Eric
:
::Hi Eric
::
:: Does this radio use a loop antenna? Is it connected? Are there shielded wires where the outside may not be grounded?
::
::Norm
::
:::Thank you Norm for the reply. I was a bit confused by the lack of hum with the phonograph too. I found the schematic here and I have a little electronics experience but I only have a multimeter to poke around with. I'll replace the wires just because the some of the conductors are exposed and then check on replacing the caps. Thanks again for the reply.
:::
::::Hi Eric
::::
:::: Loud hum is usually caused by bad electrolytic filter caps. I'm surprised that it's not present when the phonograph is on?
::::
::::Norm
::::
:::::I have a Majestic 8JL885. There is a loud hum when the radio is turned on and it is not present when the phonograph is on. I am going to replace the wires that I can see insulation falling off, but I was wondering is someone might know if this problem may be tube issue or not. Thanks in advace for any response I might get.

Hi Eric

Your electrolytic caps are identified as C33 & C34 in the schematic. They are probably mounted on the cassis & in the same can? Both sections are 16 mfd. You may have only 2 wires, with the can being negative?

Use 2 - 22 mfd @ 450 volts for replacement. This is the standard modern value.

I would disconnect the original but leave the can in place. Use 2 caps for replacement mounted under the chassis. Some collectors take the old can apart and insert new caps inside. This will look original be how many people will be looking under the chassis?

Norm

:Hi Norm if you're out there...
:
:I replaced that old wire which I mentioned awhile back which ended up being a speaker wire. I was looking to replace the filter cap, but I was unsure what to look for... it is electrolytic axial and on one end it has two leads. It is 16mfd /450v and I'm not finding it to easy. Also the schematics show two, but I only found one in the set. Would you know what I'm looking for?
:
:Thanks in advance.
:Eric
:
::Hello Norm,
::
::There is an antenna that is on the inside wall of the cabinet. I think it is connected but haven't really checked. The radio is actually my Grandpa's and it's a little project we are looking at. He just told me that the hum started after he replaced the power transformer many years ago. He thinks he still has the old txfmr and we can dblchk the part numbers.
::
::Regards,
::Eric
::
:::Hi Eric
:::
::: Does this radio use a loop antenna? Is it connected? Are there shielded wires where the outside may not be grounded?
:::
:::Norm
:::
::::Thank you Norm for the reply. I was a bit confused by the lack of hum with the phonograph too. I found the schematic here and I have a little electronics experience but I only have a multimeter to poke around with. I'll replace the wires just because the some of the conductors are exposed and then check on replacing the caps. Thanks again for the reply.
::::
:::::Hi Eric
:::::
::::: Loud hum is usually caused by bad electrolytic filter caps. I'm surprised that it's not present when the phonograph is on?
:::::
:::::Norm
:::::
::::::I have a Majestic 8JL885. There is a loud hum when the radio is turned on and it is not present when the phonograph is on. I am going to replace the wires that I can see insulation falling off, but I was wondering is someone might know if this problem may be tube issue or not. Thanks in advace for any response I might get.

Thanks for the quick response Norm. C33/34 were the caps I was looking for, but as you suggested I only found one 5" or so can inside rated at 16uf/450v. To clarify my last, the cap had one lead out one side and two leads out the other side. I wasn't sure if this was called radial/axial, multi-part, or axial(with two leads on one side).

Eric

:Hi Eric
:
: Your electrolytic caps are identified as C33 & C34 in the schematic. They are probably mounted on the cassis & in the same can? Both sections are 16 mfd. You may have only 2 wires, with the can being negative?
:
: Use 2 - 22 mfd @ 450 volts for replacement. This is the standard modern value.
:
: I would disconnect the original but leave the can in place. Use 2 caps for replacement mounted under the chassis. Some collectors take the old can apart and insert new caps inside. This will look original be how many people will be looking under the chassis?
:
:Norm
:
::Hi Norm if you're out there...
::
::I replaced that old wire which I mentioned awhile back which ended up being a speaker wire. I was looking to replace the filter cap, but I was unsure what to look for... it is electrolytic axial and on one end it has two leads. It is 16mfd /450v and I'm not finding it to easy. Also the schematics show two, but I only found one in the set. Would you know what I'm looking for?
::
::Thanks in advance.
::Eric
::
:::Hello Norm,
:::
:::There is an antenna that is on the inside wall of the cabinet. I think it is connected but haven't really checked. The radio is actually my Grandpa's and it's a little project we are looking at. He just told me that the hum started after he replaced the power transformer many years ago. He thinks he still has the old txfmr and we can dblchk the part numbers.
:::
:::Regards,
:::Eric
:::
::::Hi Eric
::::
:::: Does this radio use a loop antenna? Is it connected? Are there shielded wires where the outside may not be grounded?
::::
::::Norm
::::
:::::Thank you Norm for the reply. I was a bit confused by the lack of hum with the phonograph too. I found the schematic here and I have a little electronics experience but I only have a multimeter to poke around with. I'll replace the wires just because the some of the conductors are exposed and then check on replacing the caps. Thanks again for the reply.
:::::
::::::Hi Eric
::::::
:::::: Loud hum is usually caused by bad electrolytic filter caps. I'm surprised that it's not present when the phonograph is on?
::::::
::::::Norm
::::::
:::::::I have a Majestic 8JL885. There is a loud hum when the radio is turned on and it is not present when the phonograph is on. I am going to replace the wires that I can see insulation falling off, but I was wondering is someone might know if this problem may be tube issue or not. Thanks in advace for any response I might get.