The RMS value of a power wave form is not the same as finding the RMS voltage value, squaring it and dividing by resistance. Exactly what does a power waveform look like? Please read completely befor
is No fault found with why average is not zero. This is the part I was responding to: I guess you meant instantaneous VOLTAGE rather than power? Otherwise you would be finding the RMS value of power.
Vrms is the (square)Root of the Mean of the Squares (of the Voltage samples). When you work out Vrms^2 in order to work out the power, you are squaring the squareroot, so the r in rms disappears and
For the EXPERTS....., I have a question which I believe will combign the two most interesting and informative threads we have had going here on the reflector for quite some time. Why is it that a Bir
And, along a similar vein: If a string of 50% duty cycle dots at say 50 words per minute are transmitted, what should the Bird meter show for power output compared to full carrier? What are the rise
Also, have you verified with a scope that 100% modulation is being achieved? Yes. Regards, Dennis O. _______________________________________________ Amps mailing list Amps@contesting.com http://lists
If you keep the modulation depth constant (as verified with a scope), does the kit perform more poorly as you increase the frequency of modulation? Slightly; like 1 or 2 percent, but not nearly the 2
Secondly, how does the calibrated kit work? Does it simply hang across the meter terminals, then you push a button and it displays what the peak value was? You calibrate the kit by adjusting a trimpo
Unfortunately my Bird 43 has no peak reading option. It did have the option once upon a time but I got tired of it eating 9v batteries and removed it. Cut out the two zener diodes that are useless an
Once I believe they call that the 'CURIE' temperature. Regards, Dennis O. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/lis
Unless you plan to modulate that amplifier, you will need bias for AM service (amplification of low level AM). If you don't bias it to at least AB you will have a disaster on your hands. 73, ... Joe,
Tom -- It has the ability to occasionally oscillate at VHF -- because it is the only HF 8877 amplifier on this planet that uses no VHF suppressor whatsoever. http://www.somis.org/8877-gs2.JPEG OK, so
Or, one can tape a big plastic garbage bag to the top of the amplifier and time how long it takes to fill the bag with air. If a 20 cubic foot bag fills in 20 seconds then you have a flow of 60 cubic
Fortunately, unlike TowerTalk, this discussion group is not controlled by a control-freak. AMEN! Dennis O. _______________________________________________ Amps mailing list Amps@contesting.com http:/
OK, I have got to reply. Most of the hams that build amplifiers for 11 meter operators and those that know little about RF are illegal CBers that have taken the relative easy exams and gotten ham tic
Mention was made in recent posts about EMP. Other than lightning damage, which can be relatively protected against by disconnection of antennae, telephone lines, a.c. power lines, etc., what are the
Anyone else receiving email with fraudulent attempts to gain access to your Ebay and PayPal accounts being sent to the address you use to post to this list? I had, and wondered where it had originate
There have been mis-designed chokes used before too! I have heard of some in some Henry amps where the few top turns would burn out. That was over SR and was cured by subtracting a few turns off the
Not necessarily. You see, when resonances occur hot spots can develop in the area that carries the current maximum. Presumably the resonance arose at the higher frequencies and that is precisely acti