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Fw: K2

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Geoff Grayer

Fw: K2

My K2/100 has suddenly stopped working. If it was an RF problem, I would have some idea where to start. But when I switch it on, 'ELEC" appears on the display, but there it stays. So what do I do next?
Please don't tell me to look for dry joints, wire whiskers, bent IC pins, or similar - I am an experienced constructor, and have checked for all these!
Geoff G3NAQ ex AE4PI, HB9APY, F0ZY
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Don Wilhelm-4

Re: Fw: K2

Geoff,

You may be am experienced constructor, but I need to tell you to look
carefully at the front panel board. Check the orientation of the diodes
too.

73,
Don W3FPR

On 7/28/2012 7:37 AM, Geoff Grayer wrote:
> My K2/100 has suddenly stopped working. If it was an RF problem, I would have some idea where to start. But when I switch it on, 'ELEC" appears on the display, but there it stays. So what do I do next?
> Please don't tell me to look for dry joints, wire whiskers, bent IC pins, or similar - I am an experienced constructor, and have checked for all these!
> Geoff G3NAQ ex AE4PI, HB9APY, F0ZY
>

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Phillip Lontz

K3 Filter question… Again?

In reply to this post by Geoff Grayer

Why an 8 pole filter

OR

Why a 5 pole filter?

Yeah I know the 5 poles are cheaper... but other than that.

Phil
Santa Fe
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Dave Perry N4QS

Re: K3 Filter question. Again?

Phil,

Go to this link on the Elecraft website:

http://www.elecraft.com/K3/Roofing_Filters.htm

And this link:

http://www.elecraft.com/K3/K3_filter_plots.htm

Dave, N4QS

----- Original Message -----
From: "Phil Townsend" <[hidden email]>
Cc: <[hidden email]>
Sent: Wednesday, August 08, 2012 8:12 PM
Subject: [Elecraft] K3 Filter question. Again?

> Why an 8 pole filter
>
> OR
>
> Why a 5 pole filter?
>
> Yeah I know the 5 poles are cheaper... but other than that.
>
> Phil
> Santa Fe
> ______________________________________________________________
> 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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Matt Zilmer

Re: K3 Filter question Again?

In reply to this post by Phillip Lontz

Those 8-pole filters have steeper skirts. Either the 5- or 8-pole
work quite well.

I use 5-pole for the narrower filters (250, 500), and the 8-pole for
1.8, 2.8, 13 KHz bandwidths.

73,
matt W6NIA
K3 #24

On Wed, 08 Aug 2012 19:12:58 -0600, you wrote:

>Why an 8 pole filter
>
>OR
>
>Why a 5 pole filter?
>
>Yeah I know the 5 poles are cheaper... but other than that.
>
>Phil
>Santa Fe
>______________________________________________________________
>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

Buck - k4ia

Re: K3 Filter question Again?

My thought on the 5 pole was that it would give you some protection but because the skirts were not as steep you could hear someone calling you off frequency better. They would be down but not out. The 5's have slightly less insertion loss and are cheaper. On the other hand they need an offset adjustment and therefore don't lend themselves to diversity reception as well.

I think the answer is: it depends on your style of operating and what you want to spend. The reason there is more than one choice is that one size does not fit all. Or, as my Nana used to say, "that's why they don't make it all vanilla."

Sent from my iPad

On Aug 8, 2012, at 10:04 PM, Matt Zilmer <[hidden email]> wrote:

> Those 8-pole filters have steeper skirts. Either the 5- or 8-pole
> work quite well.
>
> I use 5-pole for the narrower filters (250, 500), and the 8-pole for
> 1.8, 2.8, 13 KHz bandwidths.
>
> 73,
> matt W6NIA
> K3 #24
>
> On Wed, 08 Aug 2012 19:12:58 -0600, you wrote:
>
>> Why an 8 pole filter
>>
>> OR
>>
>> Why a 5 pole filter?
>>
>> Yeah I know the 5 poles are cheaper... but other than that.
>>
>> Phil
>> Santa Fe
>> ______________________________________________________________
>> 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

Matt Zilmer

Re: K3 Filter question Again?

Good point. It would depend upon whether or not you'd want to hear
someone so far from zero beat.

73,
matt

On Wed, 08 Aug 2012 23:38:06 -0400, you wrote:

>My thought on the 5 pole was that it would give you some protection but because the skirts were not as steep you could hear someone calling you off frequency better. They would be down but not out. The 5's have slightly less insertion loss and are cheaper. On the other hand they need an offset adjustment and therefore don't lend themselves to diversity reception as well.
>
>I think the answer is: it depends on your style of operating and what you want to spend. The reason there is more than one choice is that one size does not fit all. Or, as my Nana used to say, "that's why they don't make it all vanilla."
>
>Sent from my iPad
>
>On Aug 8, 2012, at 10:04 PM, Matt Zilmer <[hidden email]> wrote:
>
>> Those 8-pole filters have steeper skirts. Either the 5- or 8-pole
>> work quite well.
>>
>> I use 5-pole for the narrower filters (250, 500), and the 8-pole for
>> 1.8, 2.8, 13 KHz bandwidths.
>>
>> 73,
>> matt W6NIA
>> K3 #24
>>
>> On Wed, 08 Aug 2012 19:12:58 -0600, you wrote:
>>
>>> Why an 8 pole filter
>>>
>>> OR
>>>
>>> Why a 5 pole filter?
>>>
>>> Yeah I know the 5 poles are cheaper... but other than that.
>>>
>>> Phil
>>> Santa Fe
>>> ______________________________________________________________
>>> 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