[Hallicrafters] tubes 8165

[pacho]

Roy:The tube  has the followingnmarks. Eimac-8165.  8165/4-65A Now I 
have checked in the Emac catalog is the same in shape and looks as the  
4PR65A. /8187. Intendednto use inpulse modulator and pulse amplifier (?) 
plate voltage 10,000 volts. Outpu p[ower 1,700 watts. Now I think is not 
for amateur service. NOW! I found it.! 4-65A/8165. I qoute: Is a small 
radial beam tetrode .........
Permit its use at max. rating through 150Mhz.. C RF amplifier 3000 
volts  270 watts out. AB rf linear amp. 3000 volts , 240 watts out/ two 
tubes . I think not good for amateur service unless for 6 meters
Frank, WB4EHB