The client intends to sponsor one project each 4-6 weeks with a budget between $500+$1000 with an additional bonus upon successful capital raising.What do you need to know and what kind of project are you considering.
The client intends to sponsor one project each 4-6 weeks with a budget between $500+$1000 with an additional bonus upon successful capital raising.you might be surprised...
Thanks, I am new to this forum so appreciate the help. If you know anybody who may have this expertise, please let me know! We would surely be interested in connecting and seeing whether we could collaborate with them. Thanks.You don't need to answer to each of us independently in the thread. I'm personally not experienced with the expertice that you're requesting. But give it a couple of days, and maybe someone will chime in.
Many of us old guys have former expertise with vacuum tube power circuits. At what power level, frequency/pulse-rate, signal accuracy. GU (Russian) series power tubes generally mean VHF band linear operation or some strange audiophile application.
The actual description of the work is very vague. There are a lot of tetrode tubes around, both as audio amplifiers and as RF amplifiers. But the when there is also mentioned Klystrons and thyratrons suddenly things get really broad.
They could also be wanting to build a GPS signal jammer or spoofer. I have concluded that the solution to jamming and spoofing is a small missile homing on the signal. And the missile should have perhaps a 25-yard kill circle. No need to be excessivly destructive.Somebody is building a medium-high powered radar, and must have deep pockets. I'd like to know who, first of all.
Picture is me with an in-house made C band TWT transmitter.
Petkan: I still remember them. If you have a specific question - please let me know. I have started with valves and may well finish with them
I have a collection of slide rules, both linear and circularI too am retired and remember the days of the vacuum tubes.
About the only way to get them now is to google them and try to find NOS.
A lot of the new tube replacements come from Russia.
They still used them in their MIGS in Vietnam.
The high power matched amplifier audio tubes are still used in hi-end audio amplifiers.
Radio and TV broadcasters no longer need an 1st Class FCC engineer on site to keep the frequency on band, and to fix things when they broke.
Everything is digital now.
The closest thing they have in solid state that behaves similar to a vacuum tube is a MOSFET,which is also a voltage device,as opposed to transistors that are current devices.
There is also work being done on Vacuum Transistors,kind of a hybrid of the two technologies that promises heretofor unreachable frequencies,into the terahertz..It uses a vacuum channel between source and drain instead of silicon.
These are nano scale devices at present,but very high output power is anticipated.
I was more or less forced to learn solid state devices and computer logic and programming due to the job market demands.
Vacuum tubes have the advantage of being immune to EMP,and the old HAM operators will be the backbone of civilian communications if such an event occurs.
The military has Faraday Shields on their equipment,so no problem for them.
Forgive me for preaching to the choir,I am sure you know all of this,this is mainly for the benefit of the solid state generation.
We put the first man on the moon with pencil,paper and slide rules and vacuum tubes.
Does anyone still have a slide rule?
Funny -- I was thinking the same thing, relative to great expectations for bargain basement prices. Sounds just like the reptiles I went to work for just out of school.Once again I will respond: There are hundreds of good texts on vacuum tube circuits and the advantage of learning from a book is that you can do it at your own pace, and review and restudy as much as needed.
A teaching deal seems far to much like it would turn into a much less comfortable design effort. So really, the whole thing has an unpleasant aroma about it.
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by Jake Hertz
by Jake Hertz