I find it difficult to believe that a filter will go bad between
manufacturer and customer. Perhaps the odd one in 1000 might get past the
manufacturer's test regime. Modern surface mount components and hybrids are
very sturdy and no postal service could impart sufficient vibration or shock
to these devices to cause damage, particularly as these are soft-packed to
absorb shocks. It's even more improbable that it could change the
performance by just a few dB that all but the best test equipment could
reveal.
I am not able to test that the filters I purchased are up to spec, but if
there have been significant numbers of failures (and the extraordinary
failure of one in a reviewer's sample), I'm coming to the conclusion that
filters should be returned to be re-tested, since the recent history
indicates a faulty test and / or manufacturing regime.
INRAD is a well-respected manufacturer, so, for Elecraft to re-test their
work (with all the calibration problems that engages) is a plus for our
confidence in the final product but a distinct fear that those filters
produced prior to this time are statistically more likely to have failures
amongst them.
Eric, is this something Elecraft could offer?
David
G3UNA
That Elecraft is testing the filters now is a good thing!
I remember a post from Elecraft a few months ago, that said that I
should not use the 8.2M IF filters that were intended for Yaesu's FT1K
because the filters for the Elecraft K3 were specially selected to get
top performance.
The recent messages of bad filters, 8-pole and 5-pole, seem to
contradict that. Or do filters break down during transport?
Anyway, awaiting my new K3 with several filters within a few weeks from
now, I expect that my filters are thouroughly tested for flatness, good
imd-performance and are handpicked for top performance.... As promised.
Or is this an impossible, strange question? Then please say so.
73
Arie PA3A
K2 36..something
>
We do now!
Originally all 8 pole filters were supposed to be 100% tested at INRAD's
supplier. When we discovered some bad ones had gotten through, we added
100% testing at Elecraft and at INRAD in Aptos.
73, Eric WA6HHQ
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
