Re: Invitation for another exchange of questionably useful information.
the arrl handbook is too basic for that. i think the ee programs are more theoretical at an undergraduate level then they were 40 yrs ago i have about 2 yrs of college but have never taken an
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arthurok <arthurok@...>
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#24852
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[Fwd: Re: Tektronix 492BP chassis heat.]
Here are some measurements on my 494P. After about 3 hours of operation in its normal position (45 degrees tilted up on the handle, standing on the floor inside a wood rack without much air
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Didier Juges <didier@...>
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#24851
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Re: Tektronix 492BP chassis heat.
The winner in my collection is the 517 at 1250 Watts. Stan
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Stan and Patricia Griffiths <w7ni@...>
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#24850
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Re: Bringing up a 555
Hi Andy, You asked about connectors for extender cables. There are three possible extenders you could be talking about: 1) vertical plugin, 2) timebase plugin, 3) power cable from mainframe to power
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Stan and Patricia Griffiths <w7ni@...>
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#24849
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Re: Tektronix 492BP chassis heat.
Hi, Gerald Dont know in what part of Aussie you be, but over here in the West we are often plagued with higher than normal Line Voltages, specially if u live near an industrial area or near a feeder
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hpxref
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#24846
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Re: Tektronix 492BP chassis heat.
alot of modern equipment either just has a 115/230 vlt switch "like a pc" or a uni versal input switching supply. one simple solution for high line voltage is a filament transformer with n its
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arthurok <arthurok@...>
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#24848
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Re: Invitation for another exchange of questionably useful information.
1 ] get a Your square of area=1 in the first quadrant of the XY plane, this is correct. and the The area of the square in the third quadrant is area=1 as well. Remember that Area = length * height for
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pink_floydian_rockstar
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#24847
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Re: Invitation for another exchange of questionably useful information.
Yeah, I understand. Its just to accept. But the whole brain of mine want to give the result [ sqrt(-1) = -1 ] !!! =) If I draw a carthesian coordinate system and pinpoint X=1 and Y=1 I get a square of
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Lars Ahlstr?m <lea56@...>
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#24845
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Re: Invitation for another exchange of questionably useful information.
Reactance, Negative Frequency, Imaginary numbers, Inductance, Capacitence, complex phasors, complex exponentials, Transform math... If you have issues with these concepts then look at your options: 1.
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pink_floydian_rockstar
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#24844
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Re: Invitation for another exchange of questionably useful information.
its a shared "delusion"
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arthurok <arthurok@...>
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#24843
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Re: Chopper wanted (the electromechanical kind)
Yes, I had though of that. I think, though, that I would be just as guilty of a crime doing that as I would be taking the tubes out of an early Tek scope to make an guitar amp. I think that if I got
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tertiary_42
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#24842
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Re: Bringing up a 555
This is not for filtering. The L manual says: "Low-frequency peaking for the X10 amplifier is provided mainly by C6002A and C6002B in the plate circuits of V5942 and V6042. With their associated
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Larry Christopher
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#24841
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Re: 7D15 COUNTER TIMER , FAULTY U688
I have an invaluable book from Fairchild, published 1973. ¡°The TTL Application Hanbook¡±. I checked your need, and what I can see, the only thing you need is a divide by 10 counter. The 8292 is
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Lars Ahlstr?m <lea56@...>
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#24840
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Re: Chopper wanted (the electromechanical kind)
Looking for GAP/R (Philbrick) amplifiers might help. Some of those were chopper-stabilized and used IIRC Airpax choppers. Cheers, Kuba
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Kuba Ober <ober.14@...>
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#24839
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Re: Invitation for another exchange of questionably useful information
Hadn't we all :) That's like with some "advanced" and "seemingly complex" ultra-low-current measurement. If you look for it on-line, there's a Bob Pease EDN article where he explains how he measured
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Kuba Ober <ober.14@...>
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#24838
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Re: Invitation for another exchange of questionably useful information.
Well, it's an abstract concept, I guess it's better treated like one. Your only "idea" should be of the properties of this number, and some applications that suit your interests. I don't think I have
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Kuba Ober <ober.14@...>
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#24837
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Re: Tektronix 492BP chassis heat.
--- In TekScopes@..., Didier Juges <didier@...> wrote: "... Over here, this is the season where a little bit more heat in the shack is a good thing :-) The 494P is the second best shack
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nj902
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#24836
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Re: Tektronix 492BP chassis heat.
I have both a 492 and a 494P and both run quite hot (measured with my finger). I did not put a thermometer on it, but 56 degrees C sounds about right, I can lightly touch it but would not want to
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Didier Juges <didier@...>
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#24835
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Re: 7D15 COUNTER TIMER , FAULTY U688
The 8292A is a low power presettable decade counter that can be connected as a /2 or /5 counter. In the biquinary mode, it is a /5 followed by a /2, and produces a square wave. The outputs can be set
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Chuck Harris <cfharris@...>
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#24834
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Re: Invitation for another exchange of questionably
Just need to remember ELI the ICE man. This is the way I learned it in the early 70s. See http://hyperphysics.phy-astr.gsu.edu/hbase/electric/phase.html#c3. I think you have it reversed. Russ WQ3X
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Russ <combatruss@...>
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#24833
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