Amps
[Top] [All Lists]

Re: [Amps] Direct rectification of AC mains to power the amp, VDD Supply

To: amps@contesting.com
Subject: Re: [Amps] Direct rectification of AC mains to power the amp, VDD Supply
From: Manfred Mornhinweg <manfred@ludens.cl>
Date: Sat, 28 Sep 2013 17:46:59 +0000
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Leigh,

...or rather than conjecture one could simply ask the savvy RF application
engineers at Microsemi whose role and raison d'?tre it is to ensure their
MOSFET RF power products are properly and optimally used.

You are right, but I'm too timid to do that! Even before answering any question, the usual thing is to get a questionnaire asking things like what one's expected monthly need for those transistors will be! If I then have to answer that there will be no monthly need, but rather just the possibility of a one time purchase of one device, or perhaps two or four, depending on the case, and maybe a publication in QEX that might lead to another five people also buying one device each, there's usually a much reduced eagerness on the part of the semiconductor company's people to spend any time on the matter. And I can't blame them.

It would be very different if I were designing an amplifier to be manufactured in large quantities. In that case I would ask, and would expect meaningful, correct answers, or I would look at another parts maker.

This situation is particularly bad for people living in countries that have no electronics industry, like mine. If someone from the USA or Germany or Japan or China asks, the people at the semiconductor company might simply assume that he is potentially an important customer, and not even ask any questions. But if someone from Chile asks - forget it! It's clear to everyone that he can only be a hobbyist or student or maybe a professor, but not someone who will buy in quantity. So, no replies, and no free samples either!

Manfred

========================
Visit my hobby homepage!
http://ludens.cl
========================
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps

<Prev in Thread] Current Thread [Next in Thread>
  • Re: [Amps] Direct rectification of AC mains to power the amp, VDD Supply, Manfred Mornhinweg <=