Absolute annoyance at been misquoted

VK2RK

Active member
I am very annoyed at been misquoted or even stating that I had said something I had not.

In the News letter the editor took the liberty to comment on a technical article I had submitted, there was no consultation as to the content of the comments.

What the comments state

“Robert said that the output of transmitters dropped by 10% if the voltage to them dropped this amount.”
I never said this, what I said is that the input power in my test case dropped by 10Watts
as far as the 81% not sure how this was derived and makes no sense.


. Hence this conditioner is even more important for older rigs”
Old or New is not an issue, I2R losses are.

Robert’s design is a belts and braces design and if you don’t require some facilities, it can be slightly simplified.”
There is no need to simplify anything, the design is the result of a lot of thought

Every time I submitted an article it created arguments, so this is the last time



Some extra thoughts on Robert’s DC conditioner.
Robert said that the output of transmitters dropped by 10% if the voltage to them dropped this amount.
This may be true of some later rigs, but older rigs on12 VDC however will not just drop 10% in output power with a drop in voltage drop of 10% in fact they will drop to around 81% of output due to the inverse power law. Some drop even more. Hence this conditioner is even more important for older rigs.
AC operated rigs also have the same problems and many USA rigs designed for 115 volt and 230 volts (sometimes switchable), the mains voltage on 115 volts was found to sag too much for proper operation on this voltage.
They recommended that the transmitters be run on 230 volts. Most USA premises had or have a centre tapped 230-volt supply and it is intended that light duty items work off 115 volts (centre tap to one end of the winding) whilst heavy current drain items ran across the whole winding.

Robert’s design is a belts and braces design and if you don’t require some facilities, it can be slightly simplified. Keep in mind with a 13.8-volt supply that R1 will dissipate around 76 watts at turn on with a current drain from the supply of 5.5 amps.
This power dissipation will drop fairly quickly as the 16.6 Farad capacitor charges. The resistor(s) can be overloaded for a short period but Robert suggests that four 10-watt ceramic resistors will survive this treatment as it is not as if 76 watts is being dissipated for long or often. The decision will be yours. I’d give it a go at that.

Rodney (Editor)
 
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BillC

Active member
Rob your article on the power conditioner made a lot of sense to me , it was obviously derived from a lot of thought, as good designs are. I have over the years designed many devices and have spent hours & hours nutting out all sorts of problems such as , practical application, the need for the device, ergonomics, availability of parts, useful life, engineering considerations both practical and technical. Design and construction is a whole philosophical study on its own. GOOD LUCK with your future designs . Regards.......
 

VK2RK

Active member
Rob your article on the power conditioner made a lot of sense to me , it was obviously derived from a lot of thought, as good designs are. I have over the years designed many devices and have spent hours & hours nutting out all sorts of problems such as , practical application, the need for the device, ergonomics, availability of parts, useful life, engineering considerations both practical and technical. Design and construction is a whole philosophical study on its own. GOOD LUCK with your future designs . Regards.......
Thank you Bill.
I have decided to resign from the club in the light of the late happenings, I have kept silent in the past about other issue and taken things on the chin, this latest happening has cemented my resolve to not bother helping others, attempting to impart knowledge acquired over many years is not received well, I have realised that all it does is bruise egos exposing their ignorance.
It was a pleasure to know you, you are of the same grit as I, you take pleasure from the craft of electronics developing innovative systems, I do appreciate your enthusiasm and genius.
Good Luck Bill.
 

BillC

Active member
If Robs power conditioner were applied to the power supply input of a solid state SSB tranceiver the result would most probably be an improvement in the dynamic range of the transmitted information, perhaps not so much as an increase in power output. The conditioner would supply the peak demands of power as required by audio peaks from the speech input, and the transmitter could more faithfully reproduce the voice tones of the operator,, IF that was considered desirable ? Could someone comment please, on these ideas.
 

VK2RK

Active member
If Robs power conditioner were applied to the power supply input of a solid state SSB tranceiver the result would most probably be an improvement in the dynamic range of the transmitted information, perhaps not so much as an increase in power output. The conditioner would supply the peak demands of power as required by audio peaks from the speech input, and the transmitter could more faithfully reproduce the voice tones of the operator,, IF that was considered desirable ? Could someone comment please, on these ideas.
Hi Bill
You placed your question in the wrong thread, however I will try to answer some of your points.

"the result would most probably be an improvement in the dynamic range"
To improve the dynamic range one expects an increase of the peak power at that instance of the dynamic peak.

"perhaps not so much as an increase in power output"
Due to the action of the ALC the voltage drop will cause an increase in drive sustained by the ALC time constant, this increase in drive will cause a reduction of PA efficiency. In fact the conditioner will cause an increase in average power that will be noticed if using the two tone method measurement, as far as a voice modulated signal little if any power increase will be noticed, but the clarity of the signal should improve due to the better peak response, having said this the drive (ALC) will require adjustment if not and retaining the old ALC settings will cause a reduction in power as the peak value are greater causing a greater ALC control action.

" IF that was considered desirable ?"
Most definitely YES
Any improvement in transmission quality is desirable, any increase in power efficiency is desirable, the conditioner achieves both, the question should be that of "Is the above improvements to the average operator desirable" Listening to the many poorly modulated signals on the bands that are caused by overdriving and 3KAL is an example of this, with many others that have no expertise to monitor their own signals for proper adjustment I would say NO the device will add another layer of complexity that they will have no understanding of, considering the many other things that they do not understand, promoting modification to ICOM, Kenwood radios to alter the ALC time constant in the belief that this cause more output power one has to wonder and consider why we have so many distorted splattering signals on the bands.

Good transmitted audio is a sign that the operator has the knowledge and skills to adjust a transmitter properly, good audio will get you further than a splattering RF one will.
 

BillC

Active member
Thank you very much Rob for the further discussion and information. I have absolutely no idea of the message posting protocol, however thank you very much for that advice. I totally agree with your comment about the quality of most of the SSB signals one hears,mostly atrocious, overdriven, wrong microphone technique etc. Just too difficult to listen to. I suppose this is posted in the wrong place too, too hard for me to work it out. Cheers..
 
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