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 Post subject: ID a tube
PostPosted: Nov Wed 20, 2019 3:19 am 
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Two of these being used in an amp, only two tubes in the set.
Anyone know what it might be? thank you


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 Post subject: Re: ID a tube
PostPosted: Nov Wed 20, 2019 3:40 am 
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Later version of the 866-jr mercury vapor rectifier tube.

Norman

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 Post subject: Re: ID a tube
PostPosted: Nov Wed 20, 2019 3:41 am 
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They look like some kind of mercury vapor rectifier.
Beat me to it. :D

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 Post subject: Re: ID a tube
PostPosted: Nov Wed 20, 2019 4:04 am 
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thanks, I'm curious what this will be when it gets here, seller is unsure
the whole device. power supply or an amp?


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PSorAMP.jpg
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PSorAMPfront.jpg
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 Post subject: Re: ID a tube
PostPosted: Nov Wed 20, 2019 4:09 am 
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Power supply.

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 Post subject: Re: ID a tube
PostPosted: Nov Wed 20, 2019 7:05 pm 
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Hefty power supply.

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 Post subject: Re: ID a tube
PostPosted: Nov Wed 20, 2019 10:16 pm 
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thanks

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 Post subject: Re: ID a tube
PostPosted: Nov Thu 21, 2019 3:28 pm 
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Looks like a homemade, full wave, high voltage power supply possibly to power a transmitter. I'm guessing it features two separate power transformers.

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 Post subject: Re: ID a tube
PostPosted: Nov Tue 26, 2019 11:04 pm 
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took a chance, and it's super heavy, and came poorly packed, so of course both tubes snapped, one completely off, both seam still sealed, may be a chance for saving, but may return it, or force seller to cough up some cash. his fate:"returns accepted"

the 866 and 866a tube has a cap connection, diffently an #8 something...


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20191126_170014.jpg
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 Post subject: Re: ID a tube
PostPosted: Nov Wed 27, 2019 12:48 am 
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the 866jr seems to be the nearest I can find as well.

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 Post subject: Re: ID a tube
PostPosted: Nov Wed 27, 2019 2:38 am 
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Opened it up, a mix of old and new caps for sure, check out the sprague's.
That is a 50K ohm 100 watt resistor.


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 Post subject: Re: ID a tube
PostPosted: Nov Wed 27, 2019 2:39 am 
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Note to all: Request shippers pack the tubes separately in bubble wrap. I always do this when I ship anything with tubes larger than 9 pin miniature, and sometimes even those. I mark them with numbered blue painter's tape, and put the same number at the tube socket from whence it came.

I've gotten some pretty bashed up stuff packed by some one that thinks if you wrap something in newspaper, throw two small pieces of foam in the box with the chassis, and trust UPS, all will be well. Long ago an ancient Hickok O'scope arrived with two wafer switches demolished. The shipper had not even fastened the case on and basically just threw it in a box.

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 Post subject: Re: ID a tube
PostPosted: Nov Wed 27, 2019 2:40 am 
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......definitely home brew. :). Use it for a boat anchor

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 Post subject: Re: ID a tube
PostPosted: Nov Wed 27, 2019 4:11 am 
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this was packed with a trash bag, sandwich bag, padded envelope, couple pieces of bubble wrap, and a small wad of paper. basically all trash can stuff

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 Post subject: Re: ID a tube
PostPosted: Nov Thu 28, 2019 1:52 am 
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it's got to be a half wave rectifier, an 81 seems close. 866JR too, but those in this shape glass are Taylor made.
CBS Industrial, this looks to be a rugged #81. Half wave cause of one plate. Full waves all have 2 plates.

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 Post subject: Re: ID a tube
PostPosted: Nov Thu 28, 2019 2:05 am 
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Type 81 tubes are not mercury vapor types. The tubes on your power supply are clearly mercury vapor types. It's easy enough to find out. The 81 tube requires 7.5-volts for the filament whereas the 866jr requires 2.5-volts.

Norman

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 Post subject: Re: ID a tube
PostPosted: Nov Thu 28, 2019 2:53 am 
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Braithwaite wrote:
Type 81 tubes are not mercury vapor types. The tubes on your power supply are clearly mercury vapor types. It's easy enough to find out. The 81 tube requires 7.5-volts for the filament whereas the 866jr requires 2.5-volts.

Norman


thanks, good point. I can probably power it up enough to check the filament voltage, that would cut the field quite a bit.

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 Post subject: Re: ID a tube
PostPosted: Nov Fri 29, 2019 3:07 pm 
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still working on this ID, has 3 wires. Liking the 866JR other than these are not Taylor made and they seem to be the only retailer of that tube.
Looks like 892JR


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20191129_083723.png
20191129_083723.png [ 748.33 KiB | Viewed 1244 times ]
20191129_083718.png
20191129_083718.png [ 546.32 KiB | Viewed 1244 times ]

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