[Elecraft] KFL3C-400 offset?

[Carl Jón Denbow]

Good advice, Mark.  I’ll do that on Monday.  I’m happy to see that I’m not the only one confused by this. I really only want to use eight-pole filters in both main and sub receivers.  73 de Carl

Sent from my iPhone
===========================
Carl Jón Denbow, N8VZ
17 Coventry Lane
Athens, Ohio 45701-3718
 
carl at n8vz.com
www.n8vz.com
EM89wh
 
IRLP 4533   Echolink 116070
 
PSK and JT65 Forever!
===========================

> On Feb 23, 2019, at 5:31 PM, Mark Musick <markmusick at outlook.com> wrote:
> 
> Something is definitely amiss.
> The only six pole filter (which has six crystals) that I know of that Elecraft sells is the 200 Hz filter. The 200 Hz filter does have an offset and is an open frame filter like the one you have shown me in the attachment.
> My 400 Hz filters are 8 pole with the 8 crystals and assembly installed in a can and has no offset.
> The 400 Hz is suppose to be a 8 pole filter. By the way, there is one crystal for each pole. Hence a 8 pole filter would have 8 crystals.
> If it were me, I would call Elecraft support, not sales, and ask them what is going on with the 400 Hz filter.
> The tag on the filter definitely describes a s 400 Hz filter with an offset. Maybe they can’t get 8 pole 400 Hz filters anymore and substituted a 6 pole which would have an offset.
>  
> Mark, WB9CIF
>  
> From: Carl Jón Denbow <n8vz at qth.com> 
> Sent: Saturday, February 23, 2019 22:18
> To: Mark Musick <markmusick at outlook.com>
> Subject: Re: [Elecraft] KFL3C-400 offset?
>  
> Mark,
> 
> Here’s a photo. You think they put the wrong label on the filter?
> 
> 73 de Carl
> 
> <image001.jpg>
> 
> 
> Sent from my iPhone
> ===========================
> Carl Jón Denbow, N8VZ
> 17 Coventry Lane
> Athens, Ohio 45701-3718
>  
> carl at n8vz.com
> www.n8vz.com
> EM89wh
>  
> IRLP 4533   Echolink 116070
>  
> PSK and JT65 Forever!
> ===========================
> 
> > On Feb 23, 2019, at 5:07 PM, Mark Musick <markmusick at outlook.com> wrote:
> > 
> > Carl,
> > It is a six pole filter. 
> > It sounds like you got the 200 Hz filter in lieu of a 400 Hz filter.
> > I think a call to Elecraft Sales is in order.
> > 
> > 73,
> > Mark, WB9CIF
> > 
> > -----Original Message-----
> > From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of Carl Jón Denbow
> > Sent: Saturday, February 23, 2019 20:36
> > To: Nr4c <nr4c at widomaker.com>
> > Cc: elecraft at mailman.qth.net
> > Subject: Re: [Elecraft] KFL3C-400 offset?
> > 
> > Bill, 
> > 
> > Thanks for your response.  This filter, unlike the others, is exposed and there are six crystal cans.  Does this mean it’s a five-pole?  I was sure I ordered an eight-pole filter?  When I do a search on the KFL3C-400 everything I see indicates it’s an eight-pole filter.  Are there two types of KFL3C-400 filters?  As you can see I’m still confused.
> > 
> > 73,  
> > 
> > Carl
> > 
> > Sent from my iPhone
> > ===========================
> > Carl Jón Denbow, N8VZ
> > 17 Coventry Lane
> > Athens, Ohio 45701-3718
> > 
> > carl at n8vz.com
> > www.n8vz.com
> > EM89wh
> > 
> > IRLP 4533   Echolink 116070
> > 
> > PSK and JT65 Forever!
> > ===========================
> > 
> >> On Feb 23, 2019, at 2:41 PM, Nr4c <nr4c at widomaker.com> wrote:
> >> 
> >> Is your filter in a metal can. Eight pole filters used to be in a can. Five pole filters were exposed parts. If the later, count the crystal cans. Should be 5, 6, or 8. 
> >> 
> >> Sent from my iPhone
> >> ...nr4c. bill
> >> 
> >> 
> >>> On Feb 23, 2019, at 1:44 PM, Carl-N8VZ <n8vz at qth.com> wrote:
> >>> 
> >>> I’m assembling a KRX3 second receiver for my K3.  One of the filters 
> >>> I’m installing is a KFL3C-400.  When I ordered it, the order form 
> >>> said it was an 8-pole filter.  I purposely only ordered 8-pole 
> >>> filters.  It was my understanding that 8-pole filters have no offsets 
> >>> to worry about.  Why, then, does the KFL3C-400 have an offset (-0.79) 
> >>> listed on the filter when the others do not?  I’m confused.  Can 
> >>> someone clarify this for me?  73 de Carl N8VZ
> >>> 
> >>> 
> >>> 
> >>> --
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