[Elecraft] Filters for K3

[Joe Subich, W4TV]

> I think that you should choose on the filter characteristics, 
> not on the price. The price difference between two 2.8s and 
> two 2.7s (matched or unmatched) is peanuts compared to the 
> K3-rigprice.

Think again about the difference between two 2.8 KHz filters 
vs. matched 2.7 KHz filters.  The upgrade price on the 2.8 
KHz filters are $109.95 EACH.  The cost to match the 2.7 KHz 
filters is $30.95.  The $179.95 difference almost pays for 
the 500/200 Hz pair if one uses 5-pole filters.  

Yes, it's small difference in comparison to the overall cost 
of the transceiver but by using 5-pole filters instead of the 
8-pole filters and buying as a kit, one could add the 100W 
amplifier or possibly KRX3 for the price of the factory built 
version with 8-pole filters. 

73, 

   ... Joe, W4TV 
    




> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Arie 
> Kleingeld PA3A
> Sent: Tuesday, December 29, 2009 5:04 AM
> To: 'DM4iM'; elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Filters for K3
> 
> 
> Martin,
> 
> About the 2.7 filters and matching.
> 
> I have two of those and they do not match. I set the offset 
> between the two and they are now both 50 Hz off or so :-) . 
> No need to worry about this. In SSB you cannot hear any 
> difference. (It will be a problem with the low bandwidths so 
> if you plan 200Hz 5-poles, then they MUST match. But we are 
> talking about the 2.7s now)
> 
> I think that you should choose on the filter characteristics, 
> not on the price. The price difference between two 2.8s and 
> two 2.7s (matched or
> unmatched) is peanuts compared to the K3-rigprice.
> 
> My choice were the 2.7s because they are actually wider than 
> the 2.8s so I can well listen AM broadcast stations and wide 
> SSB with it, without sacrificing much roofing-effect.
> 
> In the end, it is your choice.
> 
> 73
> Arie PA3A
> 
> 
> 
> -------------------------------------
> 
> <Snip>
> 
> The expense on 2 matched 5 pole or 2 8-pole filters is about 
> the same, so the criteria here is performance.
> 
> May i call for a run-off?
> <snip>
> 
> 
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