[Elecraft] K3SYN3 with and without shielding

[The Smiths]

That is NOT a "shield" that is a "stiffenner" plate.  It does NOTHING for RF Shielding.  That plate was intended to keep your Synth board from bowing when you have the internal speaker on with the CW or Audio monitor up LOUD while transmitting.  It was found that in SOME cases loud audio monitoring with internal speakers would cause the CW to chirp or SSB to move Freq. while transmitting.

If you want that plate it is available as a "mod" and costs $20.00.  You can find it on Elecrafts site.  Keeping in mind that you only use 1 Synth board for transmitting you should only really need one plate (if any at all).

The reason that you MAY want to consider having it is because , just like the resistor mod that fixed another possible Chirpping with the CW, you MAY some day swap your Synth boards for Testing or some other reason, and if and when you do, you will want to assure yourself that the Mods are on the Transmit board yet again.

I hope this answers your questions..

 

PS.  Look closely at the Plate, you will notice that it actually does NOT cover any parts on the board.  That side of the board has all the parts sticking through that plate.  Most of the parts on that PCB are mounted SMD on the other side.

 


 
> Date: Wed, 23 Jun 2010 07:04:33 -0700
> From: LA3ZA at nrrl.no
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] K3SYN3 with and without shielding
> 
> 
> I am about to install the second receiver in the K3. I now have two
> synthesizers, the old no 1 which has been made up to date with a paralleled
> resistor (
> http://www.elecraft.com/K3/mods/KSYN3%20DDS%20Gain%20Modification.pdf KSYN3
> DDS Gain Modification ) and which does not have any shield. Then I have a
> new one with a shield which is several mm thick and covers most of the PCB. 
> 
> I would guess the shield is there for a purpose, so is it advisable that I
> swap the synthesizers and use the shielded one as no 1, which is also used
> for transmission I presume?
> 
> 
> Sverre
> 
> -----
> Sverre, LA3ZA
> 
> K2 #2198, K3 #3391
> http://www.qslnet.de/member/la3za/K2/mod.html LA3ZA Unofficial Guide to K2
> modifications 
> -- 
> View this message in context: http://elecraft.365791.n2.nabble.com/K3SYN3-with-and-without-shielding-tp5213399p5213399.html
> Sent from the [K3] mailing list archive at Nabble.com.
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