Elecraft

KFL3C-400 offset?

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Carl-N8VZ

KFL3C-400 offset?

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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Nr4c

Re: KFL3C-400 offset?

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 <[hidden email]> 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
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

Carl-N8VZ

Re: 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

[hidden email]
www.n8vz.com
EM89wh

IRLP 4533 Echolink 116070

PSK and JT65 Forever!
===========================

> On Feb 23, 2019, at 2:41 PM, Nr4c <[hidden email]> 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 <[hidden email]> 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
>>
>>
>>
>> --
>> Sent from: http://elecraft.365791.n2.nabble.com/
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>

Mark Musick

Re: KFL3C-400 offset?

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: [hidden email] <[hidden email]> On Behalf Of Carl Jón Denbow
Sent: Saturday, February 23, 2019 20:36
To: Nr4c <[hidden email]>
Cc: [hidden email]
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

[hidden email]
www.n8vz.com
EM89wh

IRLP 4533 Echolink 116070

PSK and JT65 Forever!
===========================

> On Feb 23, 2019, at 2:41 PM, Nr4c <[hidden email]> 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 <[hidden email]> 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
>>
>>
>>
>> --
>> Sent from: http://elecraft.365791.n2.nabble.com/
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this
>> email list: http://www.qsl.net/donate.html
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Dave-3

Re: KFL3C-400 offset?

In reply to this post by Carl-N8VZ

The "previous" web site used to implicitly say which filters were 5 pole and
which were 8 pole on the ordering page. The new "improved?" website omits
this information. Looking to answer the same question recently I had to
resort to looking elsewhere on the web!

Dave
Ww2r

>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 J?n Denbow, N8VZ
17 Coventry Lane
Athens, Ohio 45701-3718

[hidden email]
www.n8vz.com
EM89wh

---
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______________________________________________________________
Elecraft mailing list
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Carl-N8VZ

Re: KFL3C-400 offset?

In reply to this post by Mark Musick

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

[hidden email]
www.n8vz.com
EM89wh

IRLP 4533 Echolink 116070

PSK and JT65 Forever!
===========================

> On Feb 23, 2019, at 5:31 PM, Mark Musick <[hidden email]> 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 <[hidden email]>
> Sent: Saturday, February 23, 2019 22:18
> To: Mark Musick <[hidden email]>
> 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
>
> [hidden email]
> www.n8vz.com
> EM89wh
>
> IRLP 4533 Echolink 116070
>
> PSK and JT65 Forever!
> ===========================
>
> > On Feb 23, 2019, at 5:07 PM, Mark Musick <[hidden email]> 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: [hidden email] <[hidden email]> On Behalf Of Carl Jón Denbow
> > Sent: Saturday, February 23, 2019 20:36
> > To: Nr4c <[hidden email]>
> > Cc: [hidden email]
> > 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
> >
> > [hidden email]
> > www.n8vz.com
> > EM89wh
> >
> > IRLP 4533 Echolink 116070
> >
> > PSK and JT65 Forever!
> > ===========================
> >
> >> On Feb 23, 2019, at 2:41 PM, Nr4c <[hidden email]> 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 <[hidden email]> 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
> >>>
> >>>
> >>>
> >>> --
> >>> Sent from: http://elecraft.365791.n2.nabble.com/
> >>> ______________________________________________________________
> >>> Elecraft mailing list
> >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >>> Help: http://mailman.qth.net/mmfaq.htm
> >>> Post: mailto:[hidden email]
> >>>
> >>> This list hosted by: http://www.qsl.net Please help support this
> >>> email list: http://www.qsl.net/donate.html
> >>
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html

Nr4c

Re: KFL3C-400 offset?

In reply to this post by Carl-N8VZ

I think Elecraft altered their filter array recently ( maybe 1-2 years) and maybe the order page hasn’t caught up. I believe they discontinued some and added some 6-pole filters. I think that is what you have.

Sent from my iPhone
...nr4c. bill

> On Feb 23, 2019, at 3:36 PM, Carl Jón Denbow <[hidden email]> wrote:
>
> 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
>
> [hidden email]
> www.n8vz.com
> EM89wh
>
> IRLP 4533 Echolink 116070
>
> PSK and JT65 Forever!
> ===========================
>
>> On Feb 23, 2019, at 2:41 PM, Nr4c <[hidden email]> 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 <[hidden email]> 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
>>>
>>>
>>>
>>> --
>>> Sent from: http://elecraft.365791.n2.nabble.com/
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>