Re: Modulated VTTC (plasma tweeter) question (fwd)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Mddeming-at-aol-dot-com>

In a message dated 3/26/01 4:44:58 AM Eastern Standard Time, tesla-at-pupman-dot-com 
writes: 

SNIP----- 

>
> Well, let's assume that the 6146 runs from 750V, takes 120mA plate 
> current, 160V on g2 and g2 current 11mA. (ICAS Class C Telegraphy 
> example, RCA manual.)  Unfortunately, I don't have any data at all on 
> the 6CL6, much less characteristic curves, so can't do a complete 
> trial calculation.  However, if we assume that 160V on the 6146 g2 is 
> as high as it ought to go, then take say 110V as minimum and 135V as 
> average. 


SNIP--- 

See if this helps: 
Max. Ratings (design center values) Class A1 Amp.: 
Max plate V                        300 
g3 (suppressor) V                  0 
g2 (screen)  Supply V      300 
g2 V                                        150 
g1 (control grid) neg bias   50 
                                pos bias   0 
plate diss                              7.5w 
g2 input                                1.7w 
bulb temp                            200C 
Typical Operation: 
Plate V                                  250 
g3 connect to cathode at socket 
g2 V                                        150 
g1 V                                        -3 
Peak AF g1 v                       3 
zero sig Plate cur.              30mA 
Max.Sig. Plate cur.            31mA 
zero sig g2                            7mA 
Max. sig g2                          7.2mA 
Plate res                                90K-ohm 
transconductance              11,000 umho 
Load res.                               7.5K-ohm 
Tot.Harm.Dist.                   8% 
Max. sig.power output    2.8 watts 
g1 volts for plate 10uA    -14V 
Max. circuit values: 
g1 cir.res.(fix.bias)             0.1Megohm 
g1 (cathode bias)               0.8Megohm 

Matt D.