[Elecraft] How to determine K3 filter type - 5-pole or 8-pole

[Oliver Dröse]

Not a 100% safe way to tell so. A lot of OPs (myself included) let their 
filters switch in earlier already. I.e. my 400 Hz 8 pole filter is switched 
in at 500 Hz DSP bandwidth (exactly that is reflected in the filter setup in 
K3 Utility) already so with Don's suggestion you would think it's a 5 pole 
filter - not true. The most reliable way is certainly the checking the 
filters themselves, i.e. hardware. Offset settings *might* be another way as 
8 pole filters normally do not have an offset while 5 poles have. But even 
that might not be 100% ... so take a look at the hardware and be sure what 
you have. ;-)

73, Olli - DH8BQA


----- Original Message ----- 
From: "Don Wilhelm" <w3fpr at embarqmail.com>
To: "Mike Flowers" <mike.flowers at gmail.com>
Cc: <elecraft at mailman.qth.net>
Sent: Friday, June 21, 2013 10:50 PM
Subject: Re: [Elecraft] How to determine K3 filter type - 5-pole or 8-pole


> Mike,
>
> The K3 Utility configuration tab can tell you which filters are installed. 
> You can tell from the filter width whether it is an 8 pole or a 5 pole - 
> compare the installed widths with the filter listing on the Elecraft order 
> page (that page specifies 5 pole and 8 pole).
>
> 73,
> Don W3FPR
>
> On 6/21/2013 3:53 PM, Mike Flowers wrote:
>> Hi Gang,
>>
>> I recently bought a used K3 which has filters installed in both the main
>> and sub receivers.
>>
>> Is there an external way of determining if these filters are 5-pole or
>> 8-pole?
>>
>> Is the value of FLx FRQ for each filter a clue?
>>
>> Thanks for your assistance!
>> *
>>
>> 73 de Mike, K6MKF
>> *
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