[Elecraft] K3: options to buy: a summary of what I learnt from you all...

[Amateur Radio Operator N5GE]

Another justification for not swapping for the 2.8Khz filter is that even the 8
pole filters will need to be adjusted if you want exact alignment with any other
filters.  Not a really big deal, but if you're a perfectionist...

73,

Tom Childers
Radio Amateur N5GE
Licensed since 1976
QCWA Life Member 35102
ARRL Life Member
Retired Professional
C# Software developer
http://www.n5ge.net

On Fri, 7 Jan 2011 08:11:12 -0800 (PST), Bill W4ZV <btippett at alum.mit.edu>
wrote:


>One comment on this.  Matching the 2.7k filters is not critical at all.  For
>example if they vary by 100 Hz total (which is more than I've seen in
>building 4 units), you can set the offset to half the difference in each
>(e.g. one is -0.79 and the other is -0.89, so you set -0.84 for both).  With
>an actual 6 dB bandwidth of about 2800 Hz, you will never notice a 50 Hz
>offset.
>
>2.7<>2.8k swap fee = $121, plus second 2.8k for $131, results in $252 more
>expensive versus two stock 2.7k filters at no additional charge.  However,
>as they say "It's your money!"
>
>73,  Bill