[Boatanchors] Thanks for Replies: Question: X-Rays from 3B28?
ka9egw1 at britewerkz.com
Sat Feb 14 12:00:15 EST 2015
How about a 2X2?
On February 14, 2015 9:29:33 AM CST, William <w_b_morton at hotmail.com> wrote:
>Ok, it appears there is no x-ray risk as the voltage is too low to
>create any... or too low to create any strong enough to actually exit
>As to why not use solid state or 5U4GB: The only reason I have is my
>project uses 807 and 7193 tubes and a non-top cap 5U4GB would look too
>bald. I figured what the heck - I found some rectifiers having a top
>plate cap so why not use them? Besides, the tube is filled with xenon.
> Such a noble tube.
>True, I now need to get a separate transformer for their filaments and
>have to see if I even have sockets and look around for larger plate
>connectors and my electric bill will go up and and and...and the whole
>shebang might not even work. But it will still be fun to try.
>If there are any other alternative non-mercury rectifier tubes having
>top caps, please let me know.
>Thanks again for all the responses.
>From: w_b_morton at hotmail.com
>To: boatanchors at puck.nether.net
>Subject: Question: X-Rays from 3B28?
>Date: Sat, 14 Feb 2015 03:42:24 +0000
>Been thinking of using a pair of 3B28 tubes to rectify an output
>voltage to around 450VDC. That value is above the critical anode
>voltage value of 50V, so that should not be a problem. Current is less
>than the 500mA max listed in the table. With the output voltage far
>lower than the ~1000V values listed in the table, I think these things
>would not even break a sweat.
>Two questions for the experts:
>1. Any issue seen operating arund 450VDC?
>2. The tubes have a sticker on the base with a warning regarding
>x-rays. Why is there a warning on the tube base but nothing shown on
>the data sheet?
>I had no idea these would present an x-ray risk based on what I saw
>(and did not see) on the data sheet, so I picked up a pair. Perhaps
>this my learning experience for the week.
>Have a great weekend!
>Boatanchors mailing list
>Boatanchors at puck.nether.net
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