I have an old HP calorimeter buried here somewhere. I guess I should dig it out. 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.conte
Since there seems to still be some confusion on the subject here is a nice article written by Roy Lewallen W7EL, the author of eznec software. He explains "RMS" power in layman's terms. A very good r
It certainly is on topic. After all "AMPS" is all about making power. What is the point of making power if you don't know how or what you are measuring. Being a participant in the thread I am rather
I have an old amp with 813's in grounded grid. All grids are grounded directly. To cut the tubes off during standby I raise the center tap of the filament transformer above ground. There is a resisto
I can see some people getting nervous already. :>) Not being an expert either, I believe what happens is the time constant in the meter is setup to respond to RF frequencies. When the audio is introd
If it is a peak reading bird it should show the same as with carrier. 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/m
I don't think most 11 meter amp manufacturers are to concerned about inter mod. The tuned circuit is there to transfer maximum power from the 50 ohm radio. 73 Gary K4FMX _____________________________
What method did you use to measure power to compare the bird to? Note that the higher power the element the broader band it is. Don't expect the 250H to be the same as the 2500H. 73 Gary K4FMX ______
Very good comparison! At least you have an independent reference that does not accomplish power measurement in the same manor as the bird. It would be interesting to see what those elements read at h
What I am getting at is the 11 meter amps needed all the power they could get for drive as there was only a few watts available usually. With a ham amp there is usually plenty of drive available and
?? Don't see where a 50 kw driver would even come close. The old rules said you could run 1 kw input to the final. For ssb that was the plate voltage times the plate current as read on meter peaks. T
Ok, ok I see where you are going with that now. :>) 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/am
An easy way to measure pretty close: You need a receiver that you can turn off the agc. Get a good audio voltmeter like an HP 400E with a nice db scale. You can find them for $10.00 or so. Hook the a
With the AGC off, how does your S meter function at all? 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listin
What kind of receiver do you have that the S meter gives signal strength response on with the AGC turned off? 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@cont
But the issue is one of gain "expansion" not of compression. Does expansion produce the same kind of distortion that compression does? 73 Gary K4FMX _______________________________________________ Am
What is full scale power of the meter? You could use a precision resistor in series with the load and measure the voltage across the resistor to get current. However keep in mind that most ac voltmet
Hi Will, I would think you could get close enough using the resistor with resistive loads. Probably as close as the cal lab would get you for an analogue meter. Problem may be that reactive loads may
I don't know if anyone has mentioned it but you also need to be careful when shorting the cap to ground, that the ground circuit for the cap hasn't opened up. For instance the meter resistor that bil
It may actually come down to some of the "manual merchants". Agilent has a small list of them on their web site where old HP manuals and copies can be purchased. They may have struck a deal with Agil