[Elecraft] KBPF3A and KBPF3B

[Dauer, Edward]

A further question about this . . . Having just read the installation 
instructions for both the KBPF3A and for the mod kit for the old KBPF3, I 
note one difference.  The mod kit requires SM work on both the existing 
KBPF board and soldering on the RF board itself.  The new KBPF3A 
instructions make no mention of any changes to the RF board.  Does that 
mean that by replacing the KBPF3 entirely there is no need to also modify 
the RF board?  If that is so it reduces the surgical risk considerably.  
Or maybe I missed something in the instructions?

Thanks, to whomever might be able to set me straight on this . . . 

Ted, KN1CBR




On 6/25/15, 10:11 AM, "Dauer, Edward" <edauer at law.du.edu> wrote:

>So, just to be sure I have this right:
>
>If I have the NEW KSYN3A synth in an old K3, and if I still have the OLD
>KXV3A, then replacing the KBPF3A with the NEW KBPF3B will give me all of
>the enhanced performance available on 100 - 500 Khz?
>
>I am thinking of replacing the KBPF3 rather than doing the mod on the old
>one because I have never done surface mount work and in my dotage can¹t
>trust myself not to make a mess of it; and because shipping the K3 back to
>the factory for the mod may not be worthwhile compared to just replacing
>the bandpass filter . . . . due to the down-time.
>
>Izzat right, that replacing the bandpass filter now will do it all?
>
>Thanks,
>
>Ted, KN1CBR
>
>
>>Message: 27
>>Date: Wed, 24 Jun 2015 23:23:05 -0500
>>From: Michael Eberle <mteberle at mchsi.com>
>>To: elecraft at mailman.qth.net
>>Subject: Re: [Elecraft] KBPF3 upgrade kit and instructions now
>>	available
>>Message-ID: <558B8229.1070207 at mchsi.com>
>>Content-Type: text/plain; charset=windows-1252; format=flowed
>>
>>
>>Will new orders for the KBPF3 have the modification already done or
>>would one need to purchase both the KBPF3 and the KBPF3MDKT if they
>>wanted to receive 100-500 kHz?
>>
>>Mike
>>KI0HA
>>
>>On 6/24/2015 7:42 PM, Wayne Burdick wrote:
>>> Hi all,
>>>
>>> The long-promised KBPF3 modification kit is now available. It applies
>>>to the KBPF3, K3 RF board, and optionally to the KRX3 sub receiver. It
>>>allows the K3 or K3S to receive signals in the 100-500 kHz range with
>>>good sensitivity. This is an interesting part of the spectrum, with
>>>
>>> For full detailms on the mod kit, see:
>>>
>>>     http://www.elecraft.com/order_form_parts.htm#K3%20Parts
>>>
>>> Also see below for an excerpt from my original posting about signals in
>>>the 100-500 kHz range.
>>>
>>> 73,
>>> Wayne
>>> N6KR
>>>
>>>
>