Dick,
Good idea, but I'm not sure it is necessary. I used a prototype P3 in WPX
CW in May at P49Y with my K3, serial 0076, which does not have the mod. Now
this was in a contest, and I wasn't particularly looking for the weakest
signals, but it did seem to interface fine with the older K3, just using the
IF output of the K3.
BTW: I strongly recommend the P3. Without it I felt "blind" with the K3.
Here's what I said in my 3830 writeup about it:
>>>>>>>>>>>>>>
The K3/P3 combo performed great. The K3 is so good as a CW run radio with
its excellent selectivity that you can feel that you are in a "hole" during
a run with no idea of general signal levels prevalent on the band (unless
you are saddled with someone's key clicks in the passband), but now with the
P3, you can see the other signals and get a good picture of what's going on
in the neighborhood. Thanks to Wayne and Eric, the owners, to Brian, who
built it, and most of all to Alan, N1AL, the P3 designer. Great job guys!
It's still a work in process; in fact, Alan even emailed me new firmware
Friday that I saw in the dark on my iPhone, but had no way to download (and
didn't want to mess with once the power returned). But I have no doubt that
it's going to be an essential accessory to all K3-owning contesters.
>>>>>>>>>>>>>>
73, andy, ae6y
- Original Message -----
From: "Dick Dievendorff"
To: "'Jim Miller KG0KP'" ; "'Elecraft Reflector'"
Sent: Tuesday, July 27, 2010 11:34 AM
Subject: Re: [Elecraft] P3 and required options
> You may wish to install the IF Output Gain modification,
> http://www.elecraft.com/K3/mods/IF_Output_Buffer_Gain_Mod_Rev_A.pdf. This
> mod has already been installed if your rig was built after about September
> 2009.
>
> It isn't essential, but you'll probably want to do this if you have a P3.
> The mod replaces one resistor.
>
> You'll need to connect to the K3's IF output, provided by the KXV3 or
> KXV3A
> Rx Antenna, IF out, and Transverter interface option.
>
> The KIO3 does not require any changes for the P3.
>
> You can install the KXV3A yourself, and the IF Output Gain modification is
> straightforward. The SMD parts are quite small, and it's easy to lose
> track
> of them.
>
> Of course you can send your radio in if you'd prefer to have the mod
> installed at the factory. It took me a few minutes with the SMD part, and
> you'll want some magnification. But it's just one resistor, and you can
> use
> the leaded resistor if you prefer. The upgrade kit includes both a leaded
> and SMD resistor.
>
> 73 de Dick, K6KR
>
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Miller KG0KP
> Sent: Tuesday, July 27, 2010 11:02 AM
> To: Elecraft Reflector
> Subject: [Elecraft] P3 and required options
>
> Which of the options/upgrades should be installed for the P3 to function
> at
> optimum capability?
>
> Is it the KIO3 bd and what is the effect of trying to use the non-upgraded
> board?
>
> Was this the bd that can be ordered on swapout or should I send in mine to
> be upgraded? How long does it take?
>
> Thanks es 73, de Jim KG0KP
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