Are 6146B and 6146B/8298A identical?

[AURA]

I need two 6146B's for a Heathkit HW-101 and I'm not sure which ones to get.
Is there any difference between the RCA's or Sylvania's 6146B and the GE's 6146B/8298A?
Has anyone tried 6146W's on HW-101? I read that the 6146W's made in the late 60's are 6146B compatible ...
Thank you.

[N3ZKP]

The late 6146B and 6146W are essentially the same tube.

As for RCA over Sylvania, take what you can get your hands on. The difference in the real world isn't worth measuring. I think RF Parts gets more for their Sylvanias that the other brands but they are ALL NOS - New, Old Stock - which means they are still 25+ years old, even if they are unused. I don't believe there has been any new production since the late 70s.

There are several threads on 6146s over in the boatanchor forum. Do a search on 6146. You'll find more information than you want.

Lon

[N3ZKP]

Just noticed the second part ...

I think the 8298A is a pulse rated tube with a higher dissipation than the 6146.

Try this web page:

http://home.comcast.net/~zcomco/The_6146_Family_of_Tubes_1.htm

73,

Lon - N3ZKP
Baltimore, Maryland

[KE4DRN]

hi,

New old stock JAN (military) 6146W (and B)
by GE made in the USA circa late 1985
also the 12by7a drives by GE

http://www.surplussales.com/Tubes-Sock-Acc/TubeSpecials.html

73 james ke4drn

[AURA]

Thank you all.