Hi All.....IMHO a better choice for conversion of the SB-200 to 6 is the
3CX800. No screen voltage needed, HV ok for the tube.
socket will mount in old tube hole...or mount on main chassis. Fill
transformer is small.
Am in the process of converting one now. de Norm N8RGR
At 12:41 PM 1/21/00 -0400, you wrote:
>Hello All,
>
>I have an SB-200 and new 4CX250B tubes with the plan being
>to make a 6 meter 10 w in, 800 w out amplifier. I also have a
>number of old articles on 6m 4CX-type amps.
>
>Does anyone have any experience in building a 6 meter amplifier
>using two 4CX250B tubes recently, especially the conversion of
>a SB-200 to these tubes that would be willing to convey to me
>the insight of their experinces ?
>
>My current 6 meter radios (Yaesu FT-680R and FT-736R) are both
>10 watt units, thus the plan conversion. My older Kachina 1 6 meter
>radio would drive the 572B tubes to full output, but that radio is just
>to old to really use regularly.
>
>/s/ Steve, N2CKH
>http://www.QSL.net/n2ckh
>
>
>
>
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