[Elecraft] [K3] KRX3 Installation R91 mod

2009-01-24 Thread Dave Van Wallaghen
Hi all, At first, I was only going to contact Ron with this as I was too embarrassed to reveal that I had maimed the RF board on my K3. But, I then thought maybe someone else could benefit from my experience and public humility ;-) I have an early serial number #338 and needed to make the

Re: [Elecraft] [K3] KRX3 Installation R91 mod

2009-01-24 Thread Bill Coleman
Dave Van Wallaghen wrote: Hi all, At first, I was only going to contact Ron with this as I was too embarrassed to reveal that I had maimed the RF board on my K3. But, I then thought maybe someone else could benefit from my experience and public humility ;-) I have an early serial number

Re: [Elecraft] [K3] KRX3 Installation R91 mod

2009-01-24 Thread Ron D'Eau Claire
If you've got the right resistance across R91, you're good! Golly Dave, never be embarrassed to stumble over a problem. To paraphrase an old saying, If you haven't damaged a trace, you haven't worked on enough pc boards... That pad was chosen because trying to solder directly to the IC with

Re: [Elecraft] [K3] KRX3 Installation R91 mod

2009-01-24 Thread Rich
Ron's 3rd hint is very important! Keep some handy. Put some on the solderwick when trying to remove components or clear holes. If that little spool of solder wick is more than a few months old the flux in it has dried out and all you are doing is heating the board/lifting the pad. I don't know

Re: [Elecraft] [K3] KRX3 Installation R91 mod

2009-01-24 Thread Dave Van Wallaghen
Thank you all for the great suggestions. The rest of the installation went well except for one hitch that Bill had mentioned about the tabs on the KRX3 PCB. In my case, I tried to get it to fit but found that all of the tabs running from the front to back (right and left sides looking from the