280 rectifier [Boatanchors] NEED TUBE INFO

[rrkrr]

I am not selling anything, but pertinent to the current discussion, the 
link below will take you to an auction site sale of a JRC "JX 280" 
rectifier tube with the original box.  There is enough resolution in the 
pictures to read the text on the box, which lists the filament as 5.0V, 
2.0A.

http://cgi.ebay.com/JRC-JX-280-Rectifier-Tube-In-Org-Cellophane-Box-MINT_W0QQitemZ120142919948QQihZ002QQcategoryZ67816QQcmdZViewItem

I believe the "JX" reference is a a manufacturer's designation, as I 
find references to "CX-280";"SX-280", and UX-280", all full wave 
rectifiers.  NJ7P's tube database (http://www.nj7p.org/Tube.php) shows a 
pinout but no parameters for type "280" but shows 5V, 2A filament specs 
for type "UX-280" and refers to type 5Y3 for other characteristics.

Bob K4ERR

Brian Goldsmith wrote:
> -----Original Message-----
> From: David Hollander 
>
>
> Brian - once again, the 280 rectifier is a 2.5 volt filament tube. It is 
> the2.5 volt version of the 80 rectifier. The National 5887 doghouse supply
> uses one to power the FB-7 receiver 2.5 volt tube version. The National 5880
> doghouse which is for the 2.5 volt version of the SW-3 also has a 280 in the
> power supply. The doghouse supplies for the early national receivers using 6
> volt tubes uses an 80 rectifier. 
>
>
> ***** The following people from the Tube Collectors Association do not agree
> with you and present some data sheets to back them up.I agree with you about
> the 280A.
>
>   
>>> 1) Re: 280 Rectifier
>>>       
>     Posted by: "Donald Daykin" daykin at ameritech.net drdaykin
>     Date: Fri Jul 20, 2007 6:54 am ((PDT))
>
> Believe me, the 280 has a 5-volt filament. Since they need separate
> windings, it makes no difference what the voltage is for the other tubes.
>
> Donald
>
>   
>>> 2) 2c. Re: 280 Rectifier
>>>       
>     Posted by: "Roger P. Walker" rp.walker at btconnect.com rp.walker
>     Date: Fri Jul 20, 2007 7:23 am ((PDT))
>
> The 280A is a MV rectifier with a heater of 2.5V 3A but 280 seems to be 5V
>
>
>   
>>> 3) From: tubecollectorsassociation at yahoogroups.com
>>>       
> [mailto:tubecollectorsassociation at yahoogroups.com] On Behalf Of Donald
> Daykin
> Sent: 20 July 2007 14:54
> To: tubecollectorsassociation at yahoogroups.com
> Subject: Re: [TCA] 280 Rectifier
>
> Believe me, the 280 has a 5-volt filament. Since they need separate
> windings, it makes no difference what the voltage is for the other tubes.
>
>   
>>> 4) 2d. Re: 280 Rectifier
>>>       
>     Posted by: "Tony" tonydaggs at comcast.net bone433
>     Date: Fri Jul 20, 2007 5:36 pm ((PDT))
>
>
> http://www.nj7p.org/Tube4.php?tube=280
>
> Tony
>
>
>
> Brian Goldsmith.
>
>
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