[Boatanchors] NEED TUBE INFO

[David Hollander]

Hi Bob -

The 280 is NOT the same as an 80. It is a rectifier with a 2.5 volt 
filament. The rest of the specs are the same or very similar to the 80 
rectifier.

280's are much harder to find and considerably more expensive so don't 
test it as an 80.

Use the 80 settings on your TV-7 with the filament set to 2.5 volts.

It is used in the early national doghouse power supplies on the radios 
that have the 2.5 volt filament tubes and it is also used in many lat 
1920's and early 1930's broadcast receivers.

Hope that helps.

73,

Dave N7RK
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Dave  N7RK          Boatanchors Home Page: http://members.cox.net/n7rk
Phoenix, Arizona         *DXCC Honor Roll*    *WAZ#22 - 75 Meter SSB*

ex-XE2/N7RK, N7RK/ZB2, VK2ERK, ZM0AJN, WB6NRK, WN6IWX

Boatanchor and Antique Radio Collector