[Amps] care and feeding

[Carl]

If they really work there its likely at no more than 30% efficiency.





thanks Carl.

I've got a couple 4x150G coaxial tubes in a cavity and I'm trying to figure 
out what the operating freq is without actually applying power.

I was told they are 1250 Mhz but I'm not sure.  Although one is labeled 
"protron death ray, use only in emergency"


Paul (KG7HF)


----- Original Message -----
From: "Carl" <km1h at jeremy.mv.com>
To: "Paul Decker" <kg7hf at comcast.net>, amps at contesting.com
Sent: Sunday, April 18, 2010 9:15:32 PM GMT -05:00 US/Canada Eastern
Subject: Re: [Amps] care and feeding

Eimac made a series of cavity amps for the early cell phone industry using
the 3CX400U7; 2 can be moved to 903.

Ive seen mention of others but havent looked for them.

There are a few commercial cavities using the RCA 7213 that will make 1296
but they are hard to find.

Carl
KM1H



----- Original Message ----- 
From: "Paul Decker" <kg7hf at comcast.net>
To: <amps at contesting.com>
Sent: Sunday, April 18, 2010 8:44 PM
Subject: [Amps] care and feeding


>
>
> Hi guys,
>
>
>
> I'm reading over the Eimac "Care and feeding of power tetrodes" because it
> came up in a search I did.
>
>
>
> page 8, figure 17 shows a cavity and says "Schematic cavity section of
> 1250 Mc. amplifier employing 4x150G tetrode"
>
>
>
> Does anyone have any information on a 1250 Mc cavity amp? Did eimac
> actually make the cavities or was that up to the end user? Roughly what
> could I do to figure out what frequency a cavity is for?
>
>
>
> thanks,
>
> Paul, kg7hf
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