Re: VTTC from Eimac 8755 on eBay

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Mddeming@xxxxxxx

Hi,

Having a max power rating of 50 KW, (Max V  X  Max A)
but a "typical" power output of only 650 W implies that it is
intended for very low duty cycle ( ~1.3%) pulsed operation.
For TC use, I think you'd be happier with one rated >1KW
Continuous power (CCW)

Matt D.


In a message dated 2/1/07 2:51:49 A.M. Eastern 
Standard Time, tesla@xxxxxxxxxx writes:
Original poster: westland <westland@xxxxxx>

*I'd like some advice from the group on a VTTC ...

There is an Eimac 8755 RF Triode available on
eBay, which seems to me would work well as the
core of a reasonably powerful VTTC.   135
amplification, 3GHz max freq, Anode V 8Kv and Amp
7.5A ... apparently you can cool it with fluids,
so it seems you could make a pretty powerful circuit with it.
Would this be a good choice (with appropriate
power source ... suggestions?) and John Freau's Staccato controller?


Here are the **Eimac 8755 specs*

*Amplification Factor (µ):* 135.0
*Anode Current (A):* Maximum 5.0
*Anode Voltage (kV):* Maximum 10
*Brand:* Eimac
*Cooling Method:* Forced Air
*Filament Current (mA):* 1,300
*Filament Voltage (V):* 6.300
*Frequency (MHz) Maximum:* 3,000
*Peak Anode Voltage (kV):* 8.000
*Peak Cathode Current (A):* 7.500
*Transconductance (µmhos):* 30
*Typical Anode Current (mA):* 1,000
*Typical Anode Voltage (V):* 1,750
*Typical Grid 1 Voltage (V):* -100
*Typical Power Out (W):* 650