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3cx10000 Ouput Test
- Thread starter Drifter
- Start date
You can set the power levels of an AM transmitter correctly with an average or PEP meter. I don't have a preference. If you're going to use average make sure the meter stays close to the same spot under modulation. If you're going to use PEP make sure the peaks are 4 times the carrier. Both settings produce the same output but peak looks better when trying to sell an amp. I know he never claimed the meter was PEP or average but what I liked was the care taken in the video to hide the right hand side of the meter and not to show the plate current while modulating.
You won't gain any peak watts.....the compression will just "bring up" some of the lower peaks to a higher baseline.. It increases your average talk power....and it does not effect the peak. Your louder because the all your modulation will be in the 80% to 100% range ( depending how its set of course).
I don't understand how this pertains to what Mack said....A well set up compressor won't have any effect on peak levels. I still use a pep meter with my compressor...personally it works better than rms in this situation...I can get a better idea of where my average peak power is hanging out at.
Maybey I'm missing something.........
I guess it doesn't have anything to do with what Mack said, my compressor is working is all. I just don't understand the hate for a Bird meter, except maybe he can't afford one.
But, I like to monitor my avg power, as well as my pep power sometimes depending on what I'm doing. It's all relative to your station and your tech anyway once you are up and running.
The only meter that I've found that can do consistent average power readings is a Bird. There are several meters that do pep quite well, but none who do avg very well at all, which is worth looking at.
BTW, there is absolutely no such thing as RMS power or watts. Only RMS voltage and amperage, so be sure of what you are saying before talking me down.
BTW, take your Palstar, MFJ, Daiwa, Dosy, RS or whatever you want and calibrate it on your favorite scale. Then switch from 20w to 200w to 2,000w and see how accurate you are.
With a Bird you still have the +/-5% no matter what slug you put in ............. hate the Bird all you want, but it's a good meter, it just doesn't show you the numbers that you want :tongue:
With a Bird you still have the +/-5% no matter what slug you put in ............. hate the Bird all you want, but it's a good meter, it just doesn't show you the numbers that you want :tongue:
While we're talking about it, tell me all about "average peak power" ........ I'm curious.
OK, Im seeing a few "common" terms misused.
"peak" and PEP are one of the same. PEP means PEAK envelope power. This is the highest power measurement, measured at the very top point of the sine wave.
For a great read on RMS and AVG
http://www.eznec.com/Amateur/RMS_Power.pdf
"peak" and PEP are one of the same. PEP means PEAK envelope power. This is the highest power measurement, measured at the very top point of the sine wave.
For a great read on RMS and AVG
http://www.eznec.com/Amateur/RMS_Power.pdf
pep is a pointless use of measurement ,this test is inconclusive at best and not believable as far as i am concerned i think you are right shock hes dumping an am radio into an amplifier with pep am 25000 slug readings into a dummy load rated at less than half?and we did not get to see either of the meters at modulation hog wash!
wizard
Well first off i must say i agree with everything donald has said.And i must point out that wizard always uses a bird 43p with a peak kit when he tests his amplifiers. Acording to ralph aka wizard when i talked to him over the phone the bird 43 is should never hold a certain power level while keyed let alone ever swing foward that is why they invented the peak kit.He told me to call bird and ask for myself.
The only reason why he is hiding the peak kit because i kept asking him on u tube to make a video with it turned off which he never did.I dont know about you guys but if i owned a 3cx10000 i would hope it would key atlest 10kw and hold it atleast.I owed a 3cx6000 that could easily key 10kw and swing foward so thats over 40kw pep.I have since no graduated to tetrodes but i still build triodes for people.
I guarentee the plate supply is to small and that the tank circuit is setup all wrong.
Ralph holds a tech class ticket and said to me that he graduated devri for what ? obviously not electronics since he doesnt even know how convert ac to dc properly on paper when using a full wave bridge rectifier.I have caught him in multiple times in his mistakes.Or build an amplifier that works properly.
What he builds is junk with a flimsy cabinet and undersized parts so you will be forced to keep bringing it back for repair.
Nice rf sheild over the tube are the holes big enough lol
Well first off i must say i agree with everything donald has said.And i must point out that wizard always uses a bird 43p with a peak kit when he tests his amplifiers. Acording to ralph aka wizard when i talked to him over the phone the bird 43 is should never hold a certain power level while keyed let alone ever swing foward that is why they invented the peak kit.He told me to call bird and ask for myself.
The only reason why he is hiding the peak kit because i kept asking him on u tube to make a video with it turned off which he never did.I dont know about you guys but if i owned a 3cx10000 i would hope it would key atlest 10kw and hold it atleast.I owed a 3cx6000 that could easily key 10kw and swing foward so thats over 40kw pep.I have since no graduated to tetrodes but i still build triodes for people.
I guarentee the plate supply is to small and that the tank circuit is setup all wrong.
Ralph holds a tech class ticket and said to me that he graduated devri for what ? obviously not electronics since he doesnt even know how convert ac to dc properly on paper when using a full wave bridge rectifier.I have caught him in multiple times in his mistakes.Or build an amplifier that works properly.
What he builds is junk with a flimsy cabinet and undersized parts so you will be forced to keep bringing it back for repair.
Nice rf sheild over the tube are the holes big enough lol
shock is it just me or is there no output choke.
Also take a good look at the plate transformer looks kinda small how many kva do you think its is.
If theres no output choke who ever buys it better not touch the coax when its on just in case lol.
Some day one of his boxes will kill someone and then he will be locked up for murder.
If hes been using a 10kw load to test all of his amps who knows what condition the resistor is in it may be above or below 50 ohms which would create a high swr.
And yes you can tell peak meter is on from the way the needle is moving .
If someone astually buys this box then they are stupid he must have about 2000 or so into it.Its a total bull box.Does it even have a new eimac tube is it even an eimac.
Also take a good look at the plate transformer looks kinda small how many kva do you think its is.
If theres no output choke who ever buys it better not touch the coax when its on just in case lol.
Some day one of his boxes will kill someone and then he will be locked up for murder.
If hes been using a 10kw load to test all of his amps who knows what condition the resistor is in it may be above or below 50 ohms which would create a high swr.
And yes you can tell peak meter is on from the way the needle is moving .
If someone astually buys this box then they are stupid he must have about 2000 or so into it.Its a total bull box.Does it even have a new eimac tube is it even an eimac.
I havent used my peak kit in over 6 years.My box swing foward i wouldnt talk if it swung backwards.
ralph make another video make sure you show the right side of the bird meter and also show the plate current meter while you talk.
A peak meter will swing foward even if your rms meter swings backwards.
ralph make another video make sure you show the right side of the bird meter and also show the plate current meter while you talk.
A peak meter will swing foward even if your rms meter swings backwards.