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PostPosted: Sun Feb 11, 2018 5:40 pm 
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Location: Fergus, ON, CA
Silly question.
I have a SAE Mk3b amp with a blown light bulb. I need to figure out which replacement bulb to get.
The bulb sleeve is very corroded. It says 1815 and I believe 2A. Any tips on how I can check the voltage?


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PostPosted: Sun Feb 11, 2018 5:50 pm 
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Location: Quebec, QC, CA
1815 bulb run on 12 volts

pretty commun
you will find it easilly


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PostPosted: Sun Feb 11, 2018 6:40 pm 
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renehuot70 wrote:
1815 bulb run on 12 volts

pretty commun
you will find it easilly


Excellent!!! many thanks.

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PostPosted: Sun Feb 11, 2018 8:32 pm 
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Location: London, ON, CA
Some examples here.
http://www.canadalite.com/1815-Miniature-Indicator-lamp-T3.25-Bulbs-BA9s

http://canada.newark.com/chicago-miniature-lighting/1815/lamp-miniature-bayonet-t-3-1-4/dp/27F228

http://www.bulbscanada.com/index.php?route=product/product&path=1193_80_757&product_id=2338

https://buy.wesco.ca/Miniature-Light-Bulbs/STANDARD-PRODUCTS/Miniature-Lamp-T-3-1-4/1815/p/06954950432-2

https://www.amazon.ca/General-Electric-Instrument-Panel-Light/dp/B000CHMXX8 Unavailable.

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Ohms

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PostPosted: Mon Feb 12, 2018 4:59 am 
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Thank you for the confirmation.
Next task at hand will be to replace the light bulb cover as it appears to burnt through.
I will try to devise something more resistant.

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PostPosted: Mon Feb 12, 2018 5:42 am 
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I suggest hitting up Amazon or eBay and getting a plug in LED upgrade. You can choose the colours and brightness and it should be a simple plug in.

Here's an example https://www.amazon.ca/Eiko-LED-14-BA9S-W-Miniature-Light-Replaces/dp/B007NV8JKM/ref=sr_1_6?ie=UTF8&qid=1518442966&sr=8-6&keywords=1815+led

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PostPosted: Mon Feb 12, 2018 7:00 am 
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Most older bulbs are now replaced with colored LEDs. THus you can change the look of the faceplate to a newer or shade different more to your liking or not.


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PostPosted: Mon Feb 12, 2018 3:16 pm 
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alboettcher wrote:
Most older bulbs are now replaced with colored LEDs. THus you can change the look of the faceplate to a newer or shade different more to your liking or not.


I like the idea of going LED...it would solve the burning of the light shield that seems common on this model.
A local electronics shop has a green LED bayonet style bulb I might try.
It’s rated at 14v....I hope it will be compatible.
I’m not too concerned what the end colour is as it’s just a utility amp in my make shift studio for running guitar through into some monitors periodically

-- 12 Feb 2018 23:25 --

Is there a way to confirm the voltage by using a multimeter/ voltage meter on the bayonet socket?

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PostPosted: Mon Feb 12, 2018 4:20 pm 
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alexander_x wrote:
alboettcher wrote:
Most older bulbs are now replaced with colored LEDs. THus you can change the look of the faceplate to a newer or shade different more to your liking or not.


I like the idea of going LED...it would solve the burning of the light shield that seems common on this model.
A local electronics shop has a green LED bayonet style bulb I might try.
It’s rated at 14v....I hope it will be compatible.
I’m not too concerned what the end colour is as it’s just a utility amp in my make shift studio for running guitar through into some monitors periodically

-- 12 Feb 2018 23:25 --

Is there a way to confirm the voltage by using a multimeter/ voltage meter on the bayonet socket?
Or the board terminals if they're accessible. Getting probes into a live socket can be a bit risky...

Be aware that LEDs, while a great idea, produce a very directional beam of light. Depending on the orientation of the bulb, they may/may not provide satisfactory results.

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PostPosted: Mon Feb 12, 2018 5:24 pm 
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To be 100% certain, power up and double check with multimeter before replacement;
That's the standard procedure for all lamps, if you are technical and know safety rules.


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PostPosted: Tue Feb 13, 2018 6:10 am 
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[/quote]Be aware that LEDs, while a great idea, produce a very directional beam of light. Depending on the orientation of the bulb, they may/may not provide satisfactory results.[/quote]

good point

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PostPosted: Tue Feb 13, 2018 9:35 am 
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always be careful with bulb wiring, as sometimes the bulb is a little too directly wired to the given 'bulb' transformer winding. You can, if not careful, possibly burn out the wiring in the transformer, for the bulb circuit. As in, fusing may not even be in place, as a bulb is very fuse like, and sometimes they did not worry too much about how the bulb was wired. Of course, this pertains to older gear with actual bulbs, in some instances.

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PostPosted: Tue Feb 13, 2018 11:07 am 
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Canadian Tire/Partsource 10/pk. I think my old TranAm used these as side marker lamps.
As Teo said,transformer tap.

G


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