[Elecraft] Flaw in the 1.8 kHz roofing filter - Final for 2009

[David Gilbert]

Personally, I find it easier to believe that Inrad fixed the problem 
based upon Elecraft's subjective confirmation of such than I do your 
totally subjective implication that they might be collectively and 
intentionally lying to us.

Dave   AB7E



Robert Wood wrote:
> In general K3 owners bought for the high performance "numbers"
>
> The ARRL numbers on the dynamic range for 1.8 filter in the QST review 
> provide "great results" but that is subjective - subjective.  Far below 
> expected numbers even if it is better then Brand x
>
> The hamfest story below is great salesman hand waving - no numbers, no 
> reposted test results
> To claim the problem is fixed implies that there are test results
> or to state another way, to claim the problem is fixed without posting test 
> results is questionable
> I doubt the story below was in response to the ARRL article
>
> It's doubtful anyone will perform a retest - (ARRL certainly NOT)
> a Retest by someone outside the firm like Sherwood, etc. would be good
> ( although we maybe too busy reading about firmware updates.....hi)
>
> The ARRL QST article as minimum indicates that not all xtal filters of same 
> model are equal
>
> back to RF,   Robert w5aj
>
>
>
>
>
> ----- Original Message ----- 
> From: "Fred Atchley" <hamkt4fk at att.net>
> To: <Elecraft at mailman.qth.net>
> Sent: Friday, October 16, 2009 12:14 AM
> Subject: Re: [Elecraft] Flaw in the 1.8 kHz roofing filter
>
>
> At the recent Santa Barbara Hamfest, Eric addressed a problem with the 
> early
> filters in the K3.
>
> The frequency would change unexpectedly. Eventually the problem was solved
> by cleaning.
>
> It was found that particles left over from the crystal manufacturing were
> modifying the freq.
>
> Inrad is just down the street from Elecraft and together they resolved the
> issue.
>
>
>
> I use the 1.8 in my K3 (#2241) with great results.
>
>
>
> 73, Fred AE6IC
>
>