Rich Measures writes:
> - - - Does the circuit in which the 4cx1600 is used have a grid
> terminating R? If so, is there an inductor in series with said R? If
> so, how much L? tnx.
Hi Rich
It looks like Ray, QRO, added the resistor after 1995 as a mod. It
also has an inductor in series but the value is not marked in the drawing.
Why do you ask?
Point of interest about converting these amps to a pair of 4CX800's:
Very easy to do as the sockets are mounted on an easy to remove plate.
However, I have both flavors of Ray's amps and a pair of 800's are
NOT the same as one 1600. Not by a thousand watts.
Both the QRO 2500 (2x4CX800A) and 3K (4CX1600B) amps run
1500 watts out all day and are fine contest amps so the day I do
have to convert the 3K's to 2500's will not be too painful, just sad.
73 Rich KL7RA
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