[Elecraft] KBPF3A and KBPF3B

[Wayne Burdick]

The K3 RF board will still need the new capacitor even if you're installing a KPBF3A (which has the LF mods already). 

This will be made clear in an upcoming errata for the KBPF3A manual. 

Wayne
N6KR

----
http://www.elecraft.com

> On Jun 25, 2015, at 11:32 AM, "Dauer, Edward" <edauer at law.du.edu> wrote:
> 
> 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
>>