Tube Lore lists 2040 in the RCA section as A.K.A. 1C21.Ira.
On 10/20/2014 4:32 PM, Joe Zatarski wrote:
thanks, I had the Otis document, but no datasheet for these tubes. I
don't believe they are 1C21, but maybe they are close enough? I think
my tubes say 2040 on them. Also, that article
Thanks for the clarification.
On Tuesday, October 21, 2014 1:48:36 PM UTC-5, I wrote:
Tube Lore lists 2040 in the RCA section as A.K.A. 1C21.Ira.
On 10/20/2014 4:32 PM, Joe Zatarski wrote:
thanks, I had the Otis document, but no datasheet for these tubes. I don't
believe they are
Here is a photo of a tube marked 2040 on the glass and 425A5 on the base
http://www.radiomuseum.org/tubes/tube_2040.html , I can't vote for its
authenticity but I have both types but not one with both markings.
I have also scraped away the black paint from 1C21s and they have an
identical
I guess now what I would like to know are some example circuits for power
supplies maybe? I guess I need 135VDC, and it needs to be isolated from the
mains because it'll also have 150VAC on it relative to earth ground.
Easiest to do is get a transformer (if I can find the right voltage output)
all my tubes have 2040 printed on them, all of them have a TD71 sticker,
and two say 425A5 on a sticker.
On Tuesday, October 21, 2014 1:55:29 PM UTC-5, Dekatron42 wrote:
Here is a photo of a tube marked 2040 on the glass and 425A5 on the base
http://www.radiomuseum.org/tubes/tube_2040.html ,
I concur. It is a thing of beauty. I purchased one of his Solitube clocks.
Quite an accomplishment!
On Monday, October 20, 2014 6:38:51 AM UTC-7, M.J.Sangster wrote:
Dalibor created an amazing tube, it has to be seen first hand to
appreciate the quality and size of the tube!
I attached a
