[Elecraft] Attentuation

Bill W4ZV btippett at alum.mit.edu
Wed Nov 26 16:20:59 EST 2008



Ralph K1ZZI wrote:
> 
> I just received my K3 last week (#2169) so I'm just getting used to it. 
> My FT-1000MP MKV had a 3 position anttenuation selector 6, 12 and 18 dB. 
> Many times I had the 18 dB pad cranked in on 160m.  I know it's only one S
> unit difference from the K3 but sometimes it's just what you need to pull
> it out.  Wish I had more than one ATT choice.
> 

One of the things you'll notice with the K3 is that you seldom (i.e. never
for me) need to bother with the attenuator to reduce IMD or BDR problems. 
That's one of the benefits of exceptional dynamic range.  The K3 has about
10-15 dB more IMD dynamic range (91 at 5kHz for MP/Inrad 5k roofing filter vs
102/106 at 5kHz for K3/500or400) than an Inrad MP which will more than cover
the 8 dB difference (18-10) in attenuators.  

I nearly wore out the ATT switch in VY2ZM's FT-1000D last year in the CQ 160
CW.  I'm looking forward to Jeff getting his new K3 soon...or I'll take my
own K3 if I return.  :-)

73,  Bill

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