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Ranger 1 mods?
I am in the process of doing mods on my Ranger 1. I have studied
everything that I can find online from WA1HLR, WA1HZK, W3AM, AD5X, W8JI (All have excellent info). All of them with the exception of W8JI seem to have some version of the WA1HLR mods. I am in the process of changing all the electrolytic and paper caps. Also increasing the voltage ratings. Solid stating the power supplies, adding the keying relays. I am regulating the LV PS with the 2 0D3/VR-150 gas tubes as in the WA1HZK mods. I am doing the minimum modulator mods, removing one cap and increasing the value of another. (I realize there are many opinions about all this) One item I am not 100% clear on at this time ( I may have more later) is the screen voltage for the modulator tubes. After I remove the 50 Watt adjustable resistor, do I connect the modulator screens direct to the +300 VDC LV supply? The modulator idle current is then adjusted with the new bias supply? If I regulate the LV supply at 300 v, will this be enough for the screens? Has anyone made a complete Ranger schematic showing all the mods? Any info on this will be most appreciated. Randy, WB5KCM |
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