On Mon, 22 Feb 99 09:16:36 -0600 Jon Ogden <jono@enteract.com> writes:
>
>>
>>I have a need for several 3-500Z tube chimneys. Reportedly Coleman
>lantern
>>globes can be used. Has anyone tried this?
>>
>>Sure beats paying $40.00 per unit from RF Parts.
>
>Lane,
>
>I've heard people suggest this before.
Maybe old hat since I was away for a week but the Coleman glass is not
the ideal choice for a chimney. Yes, they usually work OK with the
4-400A/3-500Z type tube but a real chimney is compounded to be neutral to
RF. The lantern type glass has a poor radiation xfer. It really becomes
a problem with the 4-1000A size bottles.
Check Paul...forgot his name....but he sells real chimneys for around
$25.
What does Ameritron get for theirs??
Rich sez that the transverse
>fan
>cools better? Hmm, I would have thought that a chimney approach would
>
>work best in getting maximum airflow over the tube.
The SB-220 and TL-922 are examples of fine fan cooled amps. The LK-500ZC
with the metal German fan is another nice example.
Who knows. I
>guess
>you use what's most convenient for your design.
No, you use what works and design from there.
73 Carl KM1H
>
>73,
>
>Jon
>KE9NA
>
>
>
>------------------------------------------------------------------------
--
>Jon Ogden
>
>jono@enteract.com
>www.qsl.net/ke9na
>
>"A life lived in fear is a life half lived."
>
>
>--
>FAQ on WWW: http://www.contesting.com/ampfaq.html
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>Search: http://www.contesting.com/km9p/search.htm
>
>
___________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com/getjuno.html
or call Juno at (800) 654-JUNO [654-5866]
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|