[AMPS] Info needed 7213/7214

[km1h@juno.com]

On Sun, 25 Oct 1998 14:28:40 -0500 "frank ayers jr" <LOMAX1@prodigy.net>
writes:
>
>Greetings
>
>Looking for specs on the 7213/7214.
>Max voltages, fil voltage/current and max frequency.


The 7213 is the usual one used by hams, the 7214 is the pulse version and
I'm not sure if there is any difference besides HV insulation.

The 7213/7214:
Fil:  both 5.5V  17.3A
Plate: 3000V/5000V pulse
Screen: 500/1000
Plate dissp.: 1500W
Grid dissp: 30W
Screen dissp: 50W
Max freq:  1215 MHz

Typical operation for the 7213 in Class C CW @ 450 MHz:
2500V Ep
500 Esg
1A  Ip
75W drive
1.35 KW out
Kind of strange..nowhere in the specs does it mention Control Grid
voltage. All the above from a 1982 ITT catalog. 

A real popular UHF tube over the past 30+ years but good ones getting
scarce via surplus market.
There were a few 7213 military cavities that tuned right thru 432 MHz
that I've heard reports of 1500W with ease. I have no idea how this tube
will perform in linear service...IMD, etc.



73   Carl   KM1H




>Thanks
>
>Frank
>W2FCA
>
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