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Re: [Amps] Another interesting tube

To: "Bill, W6WRT" <dezrat1242@yahoo.com>, "AMPS" <amps@contesting.com>
Subject: Re: [Amps] Another interesting tube
From: "Carl" <km1h@jeremy.mv.com>
Date: Mon, 30 Jul 2012 22:02:12 -0400
List-post: <amps@contesting.com">mailto:amps@contesting.com>
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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