Suggestions for tweaks while building K2 and KSB2

[Ben Hofmann K1NT]

Hello folks,
 
I'm new to the list, and have just began assembling my
newly purchased K2, and KSB2.
 
I'm looking for suggestions of things I can do while
in the process of building the K2 and KSB2 that may
help avoid some of the issues that have come up with
other users.  Here's what I've come up with so far:
(mostly from viewing LA3ZA's web site, and monitoring
the list the last couple of weeks)
 
-Ground the mic jack outer conductor
-Ground the SSB filter crystals near the bottom of the
can instead of on the top
-Pay close attention to windings on T2 and T4 while
they're being built in order to have full output on
10m
 
Anyone have any other suggestions?
 
Thanks.
 
-Ben  KB1AHR
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[Tom Mc]

Is this the time to consider the 14 matched xtals?

I bought a set at the time I installed my SSB unit (which was  well after
the basic K2 was built).  I still haven't traded out the original xtals for
the new ones in the K2, but once I do they will match the SSB's xtals.

Tom
WB2QDG
K2 #1103

When a clock is hungry, does it goes back four seconds?


-----Original Message-----
From: [hidden email] <[hidden email]>
To: [hidden email] <[hidden email]>
Date: Saturday, October 02, 2004 12:13 PM
Subject: [Elecraft] Suggestions for tweaks while building K2 and KSB2


Hello folks,

I'm new to the list, and have just began assembling my
newly purchased K2, and KSB2.

I'm looking for suggestions of things I can do while
in the process of building the K2 and KSB2 that may
help avoid some of the issues that have come up with
other users.  Here's what I've come up with so far:
(mostly from viewing LA3ZA's web site, and monitoring
the list the last couple of weeks)

-Ground the mic jack outer conductor
-Ground the SSB filter crystals near the bottom of the
can instead of on the top
-Pay close attention to windings on T2 and T4 while
they're being built in order to have full output on
10m

Anyone have any other suggestions?

Thanks.

-Ben  KB1AHR
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[Don Brown-4]

Hi

It depends. If you have an older K2 before s/n 3000 then you may improve things with a new crystal set. There is also no advantage to having all 14 crystals matched. The 7 in the CW filter need to match and the 7 on the SSB board need to match but the CW and SSB do not need to match each other because the SSB and CW crystals are not used at the same time. Many of the crystal sets before s/n 3000 were fine and no improvement will be had by changing them all out. It was just some of the crystal sets were a little out in the early K2's and then the new set of crystals will improve the band pass ripple and overall gain of the radio. It is also more important to have the SSB crystals closer matched it you are setting up the SSB board for 2.5 KHz bandpass. So if you have an older SSB module and want to upgrade to the 2.5 KHz bandpass then you may want to change the crystals. The caps are easier to change when the crystals are removed first.

Don Brown


  ----- Original Message -----
  From: Tom Mc<mailto:[hidden email]>
  To: [hidden email]<mailto:[hidden email]> ; [hidden email]<mailto:[hidden email]>
  Sent: Saturday, October 02, 2004 12:44 PM
  Subject: Re: [Elecraft] Suggestions for tweaks while building K2 and KSB2


  Is this the time to consider the 14 matched xtals?

  I bought a set at the time I installed my SSB unit (which was  well after
  the basic K2 was built).  I still haven't traded out the original xtals for
  the new ones in the K2, but once I do they will match the SSB's xtals.

  Tom
  WB2QDG
  K2 #1103

  When a clock is hungry, does it goes back four seconds?


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[Ben Hofmann K1NT]

Oops, I guess I forgot to mention that my K2 and KSB2
are both brand new purchased in Aug or Sep '04.  K2 is
serial # 44?? (can't remember exactly)  I was of the
impression that the current crystals being shipped
(for the K2 and the KSB2 both)are already matched
sets.  Don, I think that's what you're saying as well,
but I want to make sure I'm not mistaken on this.

-Ben  KB1AHR
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[Don Brown-4]

Hi

Yes if you have a new K2 (>3000) you already have the matched crystals. No need to replace them.

Don Brown

  ----- Original Message -----
  From: [hidden email]<mailto:[hidden email]>
  To: [hidden email]<mailto:[hidden email]>
  Sent: Saturday, October 02, 2004 3:17 PM
  Subject: Re: [Elecraft] Suggestions for tweaks while building K2 and KSB2


  Oops, I guess I forgot to mention that my K2 and KSB2
  are both brand new purchased in Aug or Sep '04.  K2 is
  serial # 44?? (can't remember exactly)  I was of the
  impression that the current crystals being shipped
  (for the K2 and the KSB2 both)are already matched
  sets.  Don, I think that's what you're saying as well,
  but I want to make sure I'm not mistaken on this.

  -Ben  KB1AHR
  _______________________________________________
  Elecraft mailing list
  Post to: [hidden email]<mailto:[hidden email]>
  You must be a subscriber to post to the list.
  Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft>    
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  Elecraft web page: http://www.elecraft.com<http://www.elecraft.com/>
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