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thus is what I want in a SDR. these non-computer inputs... 2 vfo dials, and a complete set of vfo control buttons for split at least a couple vfo memories af gain, mic/cw gain filter controls... narrow/wide for both cw and ssb, plus passband edges key, mic, tx footswitch/handswitch...

poorly written. ............... is it possible to get correct grid bias, something between -50 an -100 volts, using only resistors and zeners, without an active power supply... .........no transformer....

is it possible to get correct grid bias with passive parts. ie, resistors or zeners? I assume correct bias would be -50 to -100 Volts on the grid

Crusher, is this for AM? what does the word 'activated' mean. there needs to be -bias on the grid, if there is +volts applied to the plate. Ii am not sure if you can do that with a grid-leak-resister. generally, there needs to be active negative bias on the grid,all the time...

more info would be helpful, such as , idle plate current. you need to have negative volts on the grid, whenever volts are applied to the plate. never apply screen volts without plate volts. also, is this for CW/FM, or linear

LZ... In my opinion, the 'figure of merit' for a beam, is forward gain, ( an exception, would be some kind of 'steerable-null' antenna for receive) as the backlobe is just another sidelobe to me. as QRM comes from random bearings, not just 180. as an aside, I am also considering some...

nut... matching, I am thinking about... a 9 to one, quarter wave matching section, three coax in parallel, to get to 5.5 ohms or so. driven element would be adjusted resonance at low-phone. lumped elements would have to be switched in, for CW. spacing is as indicated. 0 (reflector)...

does anyone use the Yagimax program?, here is what I have come up with. ANY comments welcome. I just can't get it better than this at 18 ft boom length 20 meters, dims in feet rf. 34.4... 0 dv. 33.2... 5 di. 32.2 ... 18 which results in, gain of,,,, edge, 14.2 , edge,,,, of 8.52...

is EME mostly CW? or is SSB possible with a reasonably sized suburban (non-Ariciebo) type setup

Capt KW and Shock.. thanks for your comments ........................... as for , mess, weight, and size, I would build the PS in a crate, and put it in an, unused adjacent room. t-frmr from a commercial, microwave oven. good idea, where would I look, some kind of scrap yard for...

If I came across 4 transformers from junked (for example) TS 520s or 820s . I could build a nice 400w amp from a Russian tube or two.

Drago.. is your system, duplex, half-duplex, or simplex? are there other 'companies/units' on the same freq? are PL tones involved? is operation, dispatch to car, worker to worker?

keep in mind that a 5 watt zener can only get rid of 5 watts of heat, if the leads are clamped to an infinite heat sink, which is not the usual case. ........... how much collector voltage, can a 2n3055 or 2n5686 tolerate?

I would use some kind of, voltage divider arrangement, fed from B+. Along with the usual string of 5 W zeners and a switch for screen V Hi/Lo