Bass Master XM100 Type:100B

[redkurn]

Yes. I saw that page, too. Sadly, all of the crosses are also discontinued.

If you end up having to buy the eBay ones and they are legit, you can use one and put the other 4 back on eBay for 10 bucks each. Or, contact the seller and see if he will sell you just one.

So this one is a no go?
https://www.mouser.com/ProductDetail...SBPZK7Bg%3D%3D

[The Dude]

Yes. I saw that page, too. Sadly, all of the crosses are also discontinued.

If you end up having to buy the eBay ones and they are legit, you can use one and put the other 4 back on eBay for 10 bucks each. Or, contact the seller and see if he will sell you just one.

[redkurn]

I might not have a choice and almost $30 ouch!
Found this...
https://alltransistors.com/transisto...ansistor=40962
https://alltransistors.com/crsearch....400&caps=TO218

https://www.mouser.com/ProductDetail...SBPZK7Bg%3D%3D

[The Dude]

I've done a bit of searching and came up with nothing. Darlingtons are a bit tougher to cross. I did find this, and they look like the real deal, are sold by a US seller, and say "old stock". Anything that says "new" is likely fake since the part is discontinued. But, buy at your own risk. I don't usually recommend buying parts from eBay, but you may not have a choice.

https://www.ebay.com/itm/Motorola-MJ...MAAOSwyhVfVSfF

[redkurn]

No! One is a PNP and the other is a NPN. They cannot be interchanged. You can't use 2 of the same part. There will be smoke.

I completely missed that... doh!
That's the one I was having a hard time finding a sub for, yorkville doesn';t list it and the local auth dealer isn't auth anymore.

[The Dude]

No! One is a PNP and the other is a NPN. They cannot be interchanged. You can't use 2 of the same part. There will be smoke.

[redkurn]

I only had time for a quick onceover, so I could have missed it. I don't see a sub for the MJH11018.

I couldn't find one other that the MJH11017G, they are on the datasheet and appear to be the same.
https://www.onsemi.com/pdf/datasheet/mjh11017-d.pdf

[The Dude]

I only had time for a quick onceover, so I could have missed it. I don't see a sub for the MJH11018.

[redkurn]

I think the one here is pushing the LED more, but I think I have seen some there.
How does my parts list look? I can't order until I know they are right. XD

[Enzo]

REgular old screw in 100 watt bulbs for your table lamp seem to be gone, but the other incandescents I mentioned are still around. And some specialty lamps, like the large globe 40 or 60 watts like for over a bathroom vanity are out there.

[Randall]

Does Home Depot even sell incandescent bulbs these days? I thought they were phased out a while ago. I bought a coated 100 watt industrial bulb on line when I built my light bulb limiter years ago.

[Enzo]

Remember the purpose of the bulb limiter. it isn't for operating the amp, it is for troubleshooting fuse-blowing amps. I'd recommend a 60 watt bulb for general work. Others may have other ideas. A 100 watt tube amp probably draws less than 50 watts at idle.

Your amp might produce a certain power and you might calculate what the mains drw might be, but the bulb is used when the amp is to be idling, not when it is driving speakers.

[redkurn]

REmember to use an incandescent bulb. Regular bulbs are harder to find, but a "special duty" bulb is good also, Liek "Appliance" bulbs or "rough service" bulbs. Hell, even heat lamps.

Will do, I'll make sure to have a clerk help find a proper bulb.
Since this is a 100w amp, I figure a 120w+ bulb should be safe and good for almost any use, some people say match it to the input watts and others say make sure it's more... It doesn't show how many watts it uses, I'm sure I could math it.

[Enzo]

REmember to use an incandescent bulb. Regular bulbs are harder to find, but a "special duty" bulb is good also, Liek "Appliance" bulbs or "rough service" bulbs. Hell, even heat lamps.

[redkurn]

Thanks to you guys helping, I may have found the parts that will substitute, I'm basing this on the spec sheet and one part Yorkville actually had as a sub on their website.
Please take a look before I order and let me know if I have made a mistake or if I am good to go, next thing is a trip to Home Depot to get parts for a Dim Bulb Tester.

https://www.mouser.com/ProjectManage...sID=b7a77ef8c9