Re KX3 booster

[w7aqk]

John and All,

I’m not necessarily recommending these amps, but you may possibly be confusing them with a prior model line--  The original  “HLA” series, such as the HLA 150 and HLA 300.  Those amps were marginal at best, although if you ran them well below their rated output they weren’t “too dirty”!  Hi.  RM Italy also sold a line of amps that didn’t even have proper bandpass filtering as they were intended primarily for CB.  I think those just had an “HL” designation.

These newer models supposedly are a much better design.  I first saw them at Dayton a couple of years ago.  The price went up substantially too!  Supposedly these are all FCC certified, whereas the prior models were not.

Dave W7AQK




-------------------------------------------------------------------------------
From: John Harper <[hidden email]>

I'm surprised a reputable company like DXE would sell the brand:

https://www.dxengineering.com/search/department/amplifiers/brand/rm-italy/product-line/rm-italy-la-250-series-vhf-linear-amplifiers?autoview=SKU&sortby=Default&sortorder=Ascending

John AE5X

Sent from Mail for Windows 10

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[Bob McGraw - K4TAX]

My comment and understanding on "FCC Certified".    The FCC now allows
companies to perform "self certification".   In other words, they allow
the fox to watch the hen house.    The companies can elect to do the
testing and submit the results to the FCC. Thus the FCC does not
actually test products to issue the certification.   I personally find
many items, such as, power supplies, CFL lamps, routers, printer power
supplies, and a host of other items that are producing noise and these
do have the required Part 15 along with other certification labels.

I did work for a company whose products were required to be "certified"
by several safety organizations and to meet radiation and safety
standards.  We used an independent testing company for all of these
tests.     On more than one occasion I observed a product just barely
meet or just barely  exceed the required radiation levels.   The company
said "this is close enough we can pass it".   I said NOPE, it has to go
back to Engineering to be improved.  Well need less to say that caused
turmoil with Sales, Marketing, Engineering and Management.    But I
stood my ground and said "improve it" knowing that production units
might be worse in terms of emissions.   Many companies seem to take the
approach "we saw it work once and it almost meets specs........ship it".
Further we find that production changes through the life of a product
may be related to part and design changes.   No further testing is
required as the model number does not change.   The labels are affixed
and the items shipped.  Who knows if they meet the required safety and
emissions requirements?   Just because it has the required labels and
statements is no assurance that it meets those requirements.   It is
called "economics".

73

Bob, K4TAX


On 11/6/2018 2:25 PM, dyarnes wrote:

> John and All,
>
> I’m not necessarily recommending these amps, but you may possibly be confusing them with a prior model line--  The original  “HLA” series, such as the HLA 150 and HLA 300.  Those amps were marginal at best, although if you ran them well below their rated output they weren’t “too dirty”!  Hi.  RM Italy also sold a line of amps that didn’t even have proper bandpass filtering as they were intended primarily for CB.  I think those just had an “HL” designation.
>
> These newer models supposedly are a much better design.  I first saw them at Dayton a couple of years ago.  The price went up substantially too!  Supposedly these are all FCC certified, whereas the prior models were not.
>
> Dave W7AQK
>
>
>
>
> -------------------------------------------------------------------------------
> From: John Harper <[hidden email]>
>
> I'm surprised a reputable company like DXE would sell the brand:
>
> https://www.dxengineering.com/search/department/amplifiers/brand/rm-italy/product-line/rm-italy-la-250-series-vhf-linear-amplifiers?autoview=SKU&sortby=Default&sortorder=Ascending
>
> John AE5X
>
> Sent from Mail for Windows 10
>
> ______________________________________________________________
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>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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[Jim Brown-10]

On 11/7/2018 6:08 AM, Bob McGraw K4TAX wrote:
> It is called "economics".

No, it is called lying and cheating.

I've also opened up noisy products and found circuit boards missing
components at the empty holes for RFI suppression components.

73, Jim K9YC

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[Bill Frantz]

Or why may US companies that manufacture in foreign countries
have decided they need to have full-time staff from the US in
the foreign country to monitor what's coming off the production
line. Many of these foreign manufacturers are always looking for
ways to cut costs, and those RFI suppression components really
don't do anything useful, particularly in the RF environment at
the factory.

73 Bill AE6JV

On 11/7/18 at 11:07 AM, [hidden email] (Jim Brown) wrote:

>I've also opened up noisy products and found circuit boards
>missing components at the empty holes for RFI suppression components.

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