[TenTec] Re: wattmeter calibration

[JEFF S JOHNSON]

I've got a 6AL5 could someone please help me with the pin connections and
Cap sizes off list.  I'm a green horn on these tube contraptions!

thank you, Jeff  aa8ve

On Sat, 18 Dec 1999 11:02:10 -0600 "Roy Koeppe" <royanjoy@ncn.net>
writes:
> 
> About,
> 
> "Regardless of the diode rectifier used, you have to be careful 
> about
> the
> value of the resistor used across the filter cap and the input 
> impedance
> of the DVM. If the DVM loads the circuit too much, you get less than 
> the
> peak voltage and calculate less than the true power value."
> 
> 
> Not at all a concern in this case. Here we are talking about a
> transmitter working into a 52 ohm dummy load. And a quite low 
> resistance
> tube with its plates connected in parallel. The circuit impedance is
> many thousands of times lower than that of a VTVM and even a VOM.
> 
> Accuracy is maintained to a high degree, depending only upon the 
> rating
> of the DC voltmeter. Yes, I'm speaking in practical terms.
> 
> 73,       Roy             K6XK
> 
> 
> 
> 
> 
> 
> 
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