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So, I'm not sure if anyone will see this thread since it's been over 10 years since it was last commented in, but I came across this exact RFI issue with Edison bulbs running at 110V mains. Basically, I was setting up my terminal and getting a strong buzz through my tonearm. After much trial and error, I isolated the problem to some Edison bulbs.

I'm going to include some links to videos I took.

This video shows the hum mostly disappearing when I turn off the squirrel cage Edison bulbs:

This video shows the hum amplified when I touch the light fixture in which the bulbs are installed:

Here's a video I took where I place some aluminum foil over the tonearm. When the foil touches the large aluminum platter, it appears to help act as an RFI sink and reduces the amount of RFI in the tonearm

Here are a few other videos of experiments to try and figure out what was causing the RFI:

If these links those work, I'll see if I can upload them elsewhere. Unfortunately. *.mov files can't be uploaded here.

In the spirit of contributing to the knowledge here, the bulbs have no markings on them except 120V/60W etched in the brass bass. They are most likely brand new bulbs bought by the homeowner (I rent) and the have a filament that zig zags 12 times (there is a six-pronged filament support at the end of the bulb). This is the most similar one I could find online:

I don't know if there is any gas in them or if they are a vacuum, but I would guess that these have a vacuum as they are cheap modern reproductions.

If anyone wants to do any experimentation here let me know. If anyone knows if there is a way to solve the RFI without replacing the bulbs let me know. If the only option is to replace the bulbs, what kinds of bulbs maintain the same look and feel but don't have an RFI problem. If I need to replace them, I'm happy to send them to anyone who might want one. I have 5.
« Last post by vintagehobby on November 21, 2019, 03:12:02 pm »
I'm new to this subject and new to this board but my Grandfather gave me a vintage lamp and I want to complete the lamp with a real antique bulb.  I wanted to see if this bulb is in fact authentic and not a reproduction.  Thanks in advance.

Antique Bulb Discussion / Bermac Bulb?
« Last post by Red90 on November 20, 2019, 11:41:39 am »
I found this light.  Does anyone know what it might be?  The closest I see in the gallery is Bermac (with a different base).  There are no markings that I can see.
General Discussion / Greetings to All
« Last post by Dennisen on October 24, 2019, 01:44:05 am »
Just a quick self-intro. The nameís Dennis. Originally from the LA area but now calling Tokyo home.

The reason why Iím here is that Iím assembling a small museum of the prehistoric, ancient, innovative and artistic, called the Oolkay Museum. Iíd like to include an early Edison bulb as an exhibit, and with some regret, need a hand with direction and acquisition. Iím still Ďin the darkí regarding pricing, condition, availability, reliable sources, and a good starting point, whether a book, a site (this looks like the place!), or an individual. I still need to explore this site to get a better grasp on the topic.

By the way, has anyone seen any Edison bulbs that were used to light the Columbia, and subsequently removed in 1895?

Thanks to all who found the time to read my swill. The very best to you all.

Wanted to Buy / Emerson Candalite wanted dead or Alive
« Last post by Littbubb on October 22, 2019, 06:26:01 pm »
I collect Frankart lamps and have a l206 and need a Emerson candalite bulb.
Any feedback or direction would be greatly appreciated
For Sale / Trade / Re: For sale: Antique "POPEYE" filament lightbulb ca 1930's
« Last post by Knomad on August 26, 2019, 01:17:56 pm »
I sold my Popeye light bulb on eBay on July 14, 2018.  I had forgotten my posting on this KILOKAT site.  I tried to attach a photo but it wouldn't transmit since it was too large.   Good luck. Knomad.
Antique Bulb Discussion / Re: Oddball incandescent tube light
« Last post by cmshapiro on August 22, 2019, 06:42:59 pm »
please email me a pic at, I can probably help you ID this. Chad
Antique Bulb Discussion / Re: Oddball incandescent tube light
« Last post by Lvxarcana on August 21, 2019, 05:49:56 pm »
Apologies for the PDF attachment. The forum limits the size. Any tips on uploading files from an iPhone would help. Iím happy to email anyone interested some photos.
Antique Bulb Discussion / Oddball incandescent tube light
« Last post by Lvxarcana on August 21, 2019, 05:41:54 pm »
Hello all,
This is my first post on this great forum. Iím at a loss trying to ID this unusual old light fixture. It runs on 115vac. It appears to be hand blown and pre WWII. The tube has brass terminals connecting filaments inside so itís incandescent. It was salvaged in western Canada. The only marking thatís legible still is a Capital A beside the brass terminal. Any information would be graciously received.
Antique Bulb Discussion / Re: Mazda bulb socket size
« Last post by adam2 on August 12, 2019, 04:43:32 pm »
These are almost certainly a standard larger screw base, internationally known as E40. Also called GES in the UK or Mogul screw base in the USA.
Less used than in years gone by but still available on fleabay and elsewhere if using the above search terms.

These sound like series street lighting bulbs.  Each lamp runs at a very low voltage but large numbers are burnt in series from a constant current high voltage supply.
Very little used these days.
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