The way I reduce power out on my Ranger to drive an amp is not exactly the right way, but it works very well. I know of several other people using the very same method, reduce the screen voltage. I reduce my normal screen voltage with a variable resistor controlling a transistor. Turn the screen voltage up and load the Ranger as normal and then adjust the screen voltage until the desired power out is obtained. Power out is adjustable from full power down to 5 watts or so, I normally run my Ranger at 10 watts to drive an amp. The Ranger is capable of a lot of positive modulation peaks running like this. I have observed no ill affects from doing this, your mileage may vary. Mike / WN3B
> > > <<Another way to get the power output down from the Ranger, is to replace the > > 6146 with a 2E26. Everything is the same, except for half the dissapation. > > Then, don't load the final stage as heavy.>> > > > > Just a curious question here... Why bother replacing the 6146 with a 2E26 if > > everything besides the plate dissipation is the same? Why not just load it > > lighter? There shouldn't be any difference the way I see it. Comments? > > With a 6146, you can only un-load the final 'so far', while maintaining the > proper > grid drive required (2.5mA, if I recall correctly). > > While 'normal' load conditions on a single 6146 are somewhere in the area of > 110mA, > 50mA (or thereabouts) is about typical for the 2E26. While you can unload the > final > down to about 75mA on the 6146, I would presume that 15 to 20mA would be easy > to accomplish with a 2E26. 700VDC @20mA is around 14w DC Input. > > I don't believe you can unload a single 6146 to anything less than around 75mA. > > I don't have a Ranger here (anymore), so I can't give specifics... I can't > remember > back that far ;-) > > 73 = Best Regards, > -=Geoff/W5OMR=- > > > _______________________________________________ > AMRadio mailing list > AMRadio@mailman.qth.net > http://mailman.qth.net/mailman/listinfo/amradio
