FWIW. No reflector should be a media for “bullying” or “name calling” at any
point, for any discussion, heated or not. The Ten-Tec reflector seems to be in
need of better thread moderation - e.g. terminating discussion on a particular
thread, when adequate information has been rendered or reached a point of
diminishing return, which this one has.
There is no need for self-imposed exile. A mistake on the keyboard happened
and apologies made. Let’s move on. End the thread and discussion. Or…
perhaps form a new discussion topic and focus on specific switchers known to be
noisy.
Steve - W5JK
On Jan 19, 2014, at 10:17 AM, Clayton Brantley <clayton_n4ev@yahoo.com> wrote:
> I have to agree with your thoughts on switch mode power supplies. I am a
> linear
> power supply man myself and my thoughts about switch mode supplies is just
> simply they belong in the garbage dump. My station supply is an old GE
> repeater
> supply with a back-up battery.
>
> Name calling will not work here because there are those that know the real
> facts
> and the facts cannot be hidden.
>
> Clayton N4EV
>
>
>
>
>
> On Sunday, January 19, 2014 3:15 AM, Richards <jrichards@k8jhr.com> wrote:
>
> HI -- I WROTE THIS REBUTTAL TO GOOD OL' JB BUT I DID NOT SEND IT AND
> PROBABLY WON'T - BUT WONDER IF IT MAKES SENSE AND IF NOT, WHY NOT...
> HE JUST BURNS ME UP WHEN HE BLOWS ME OFF BY SAYING I AM IGNORANT... THAT
> IS NOT AN ARGUMENT, IT IS JUST NAME CALLING...
>
> OHHHHH..... HE BURNS ME UP...
>
> ANY REASON THIS LOGIC IS WRONG?
>
> Note - Again I did not send it and probably won't
> but I am sick and tired of his being a bully instead
> of a teacher.
>
>
>
> -- JHR --
>
> ----------------------------------------------------------
> DRAFT DRAFT DRAFT DRAFT
> ------------------------------------------------------------
>
> On 1/17/2014 4:43 PM, Jim Brown wrote:
>
>> No, there is a gap in your knowledge of fundamental electricity and
>> electronics.
>
>
> OK... once again, you tell me I am ignorant, rather
> than explaining it. One does not need an
> engineering degree to get this.
>
>
> FACT - switch mode supplies are often noisy. In fact,
> the new Chinese supplies have a knob to "shift" the
> noise when it adversely affects the operating frequency.
> You can debate whether or not that is "good engineering"
> practice, but there it is.
>
> FACT - linear supplies seem inherently less problematic,
> and don't seem to have these extra noise controls.
>
> FACT - historically, when switch mode supplies first
> arrived on the scene, there were many complaints about
> excessive noise - certainly more or different types of
> complaints than hams were expressing about linear supplies.
>
> If switch mode supplies were not inherently noisy, there
> would be no discussion about whether or not "good
> engineering practice" has sufficiently masked, suppressed
> or fixed them to make them useful in the shack.
>
> Your spin makes it sound like there is no issue or
> problem at all, and I don't accept that.
>
>
>
>
>> No, we simply follow good engineering practice when designing and
>> manufacturing the product in question.
>
>
>
> OK... I guess what you call "good engineering practice,"
> - I call masking and suppressing noise. Manufactures
> have "improved" them over time, but I do not believe
> they have done a complete job of it.
>
>
> FACT - Ten Tec sells switch mode supplies it concedes
> make noise outside the ham bands - rendering them
> useless when using their own general coverage receivers.
> This does not happen with a linear supply.
>
>
> So, you can call me ignorant...again... and smother me
> with a vitae of advanced degrees...but the fact is,
> I prefer linear supplies because they seem to be
> inherently less problematic, much quieter and do not
> produce the same noise my TenTec switch mode supply does.
>
> Paul Clinton admits switch mode supplies are noisy,
> but TT does not care, because they don't make noise in
> the ham bands. Apparently they are not intended to
> work with their general coverage receivers and other
> radios.
>
>
>
>
>> Enough with dumb analogies. Go to the ARRL Handbook and study the
>> fundamentals.
>
>
> I read that, and it sounds like switch mode supplies make
> noise that "good engineering pracitce" is supposed to
> mask or suppress. But, calling me names does not
> provide an explanation... It takes logic, science, and
> a little patience to accomplish that.
>
> The discussion is based on the fact that switching
> mode supplies are inherently noisy - or at least more
> noisy than linear supplies. It did not just arise
> out of nothing.
>
> Anyone wanna buy my Ten-Tec switch mode power supply ??
>
>
>
>
>
>> __________________________ JHR ________________________________
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