-
You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
LOL LOOK AT THE SCOPE. Especially when he says it looks good
- Thread starter Low_Boy
- Start date
Ya got that right.
With a signal that bad on the scope; you couldn't do much worse.
Completely square-waved and severely pinched off on the middle.
Yeah, he's a legend in his own shop.
With a signal that bad on the scope; you couldn't do much worse.
Completely square-waved and severely pinched off on the middle.
Yeah, he's a legend in his own shop.
Last edited:
The jackass was using a 20 MHz scope to begin with and he couldn't even get the trace rotation set properly let alone the flat topping and cut-off.
Mike calls that waveform "boxcars".
I call it "kazoo", since you'll sound as if you're playing one.
73
I call it "kazoo", since you'll sound as if you're playing one.
73
Looks like the cobra 29 in my old truck. It gets good audio reports and cuts lips....I can't imagine how bad it is after going through 2 class C leenyars.
No bs here..red wire mod...red led mod. 50watts! Bird doesn't lie. Were do I sign up for such a great teknishion. I wonder how many watts he can get from a 4 pill!!
so ...
13.8 X 4A = 55.2W / 60% (being generous even for a FET)= 33.12~
Yup , unbelievable. *
Now it is possible to get much better efficiency ...
http://www.classeradio.com/
but this is a very specific exception.
Let's go back to school for just a bit .
Voltage multiplied by current equal watts.
A BJT in a tuned, single ended circuit can approach 60% efficiency.
There are other current drains on a transceiver so approximately 50% efficiency is an acceptable rule of thumb.
Although a MosFET may have slightly better efficiency the above still holds reasonably true.
Bird, Dosey, MFJ, it doesn't really matter. The above is what you get.
*I wonder what the thermal load is on the surface area of that TO220 mounting
Now on to the "red wire mod" .
Seems our esteemed technician has seen fit to insert either an extra current carrying conductor from the main filter cap or a delay line.
Ever wonder exactly how long a nanosecond is?
I was looking for the particular lecture that I attended in but even in the expanse of the web I couldn't find it. Just that thought may seem somewhat self aggrandizing but actually it was I remember quite well and smile every time I think of Admiral Grace Hopper's nanoseconds.
"One accurate measurement is worth a thousand expert opinions" - Adm Grace Murray Hopper
This has nothing to do with inflated wattage claims or the red wire mod (save for it's length reminded me of ...)
It has everything to do with visualizing what you can not see. Understanding what you can measure. And how to tell the difference between physics and phucktards.
Anything you can find that directly relates to Admiral Grace Hopper's work be it video or white paper is worth reading.
Seems our esteemed technician has seen fit to insert either an extra current carrying conductor from the main filter cap or a delay line.
Ever wonder exactly how long a nanosecond is?
I was looking for the particular lecture that I attended in but even in the expanse of the web I couldn't find it. Just that thought may seem somewhat self aggrandizing but actually it was I remember quite well and smile every time I think of Admiral Grace Hopper's nanoseconds.
"One accurate measurement is worth a thousand expert opinions" - Adm Grace Murray Hopper
This has nothing to do with inflated wattage claims or the red wire mod (save for it's length reminded me of ...)
It has everything to do with visualizing what you can not see. Understanding what you can measure. And how to tell the difference between physics and phucktards.
Anything you can find that directly relates to Admiral Grace Hopper's work be it video or white paper is worth reading.
Y'know, I can understand this type of radio workmanship forty years ago. With no information highway or a consensus of proper convention or protocols. But for this ignorance to continue despite the overwhelming information available to the contrary, these ignorant`concepts and delusions still continue.
He seems to be concerned with only the total power output and disregards everything else. Wonder if he understands different harmonics and how they occur? Or the life expectancy of the MOSFET? Did anyone else notice that he had spread the 54mhz trap coil? He spent - how much - on the two Bird meters? What - ~$1200? Yet he isn't aware of a little knowledge that is free that would turn his quality of workmanship around 180 degrees. How does he remain this clueless and still have customers? Boggling - isn't it?
It isn't stupidity; just ignorance.
Now if he learns better and continues with his present methods; then it is stupidity.
He seems to be concerned with only the total power output and disregards everything else. Wonder if he understands different harmonics and how they occur? Or the life expectancy of the MOSFET? Did anyone else notice that he had spread the 54mhz trap coil? He spent - how much - on the two Bird meters? What - ~$1200? Yet he isn't aware of a little knowledge that is free that would turn his quality of workmanship around 180 degrees. How does he remain this clueless and still have customers? Boggling - isn't it?
It isn't stupidity; just ignorance.
Now if he learns better and continues with his present methods; then it is stupidity.
Last edited:
Admiral Hopper was the one who found an actual bug in a computer program. In a computer that filled a gymnasium she did find a moth caught in a relay, hence the term BUG in a programs was born.