There is nothing wrong with a lot of old tech tubes.
I have several old fashioned 7213's and a couple of the 7214 pulse version
and always wanted to build something around them.
For now they are just spares for military cavities retuned to 222 and 432 .
Many moons ago in the mid 60's I used 6161's that were given to me NIB when
a CH 56 transmitter was scrapped, I was the tower ape at that site doing on
call moonlighting when needed as I lived about 5 miles away. Thats when I
was taught about cavity and flat plate designs and had them as high as 1296
with decent efficiency considering the frequency
Carl
KM1H
----- Original Message -----
From: "Bill, W6WRT" <dezrat1242@yahoo.com>
To: "AMPS" <amps@contesting.com>
Sent: Monday, July 30, 2012 9:16 PM
Subject: Re: [Amps] Another interesting tube
> ORIGINAL MESSAGE:
> On Mon, 30 Jul 2012 20:55:19 -0400, you wrote:
>
>>Glass instead of ceramic and only a 150C seal limit means lots of air when
>>trying for 1500W.
>>That really is an ancient technology tube and is only good to 6M.
>
> REPLY:
> All true, but the tube is so cute! :-)
>
> Seriously though, I would run two in parallel if going for 1500 watts. And
> lots
> of air.
>
> And spend the money I saved on antennas.
>
> 73, Bill W6WRT
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>
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