KAT100

[Ian Maude]

Hi all,
Just finished building my KAT100 and it seems to be working fine!  Just
one question though.  The book mentions to tune c31 for lowest voltage
on pin 3 of U5 and also mentions that it should be as close to 0v as
possible.  I could get it nowhere near this, best at around 1.6V.  I can
get the target voltages ok on R3 and R4 so it seems this is ok but I
find the reference odd.

Any pointers?

Ian

--
Ian Maude G0VGS Morecambe Lancs UK | [hidden email]
Sysop of GB7MBC, the Morecambe Bay Cluster
Running Linux and DXSpider | K2 #4044
 
Find out about Summits on the Air!  
Visit the SOTA web site at http://www.sota.org.uk

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[Don Brown-4]

Hi

This does not sound right. You should be able to get the voltage down to around a few mV. It seems like the several I have built would go down to 10 to 20 mV.


Don Brown
KD5NDB
  ----- Original Message -----
  From: Ian J Maude<mailto:[hidden email]>
  To: Elecraft<mailto:[hidden email]>
  Sent: Saturday, June 26, 2004 5:04 PM
  Subject: [Elecraft] KAT100


  Hi all,
  Just finished building my KAT100 and it seems to be working fine!  Just
  one question though.  The book mentions to tune c31 for lowest voltage
  on pin 3 of U5 and also mentions that it should be as close to 0v as
  possible.  I could get it nowhere near this, best at around 1.6V.  I can
  get the target voltages ok on R3 and R4 so it seems this is ok but I
  find the reference odd.

  Any pointers?

  Ian

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[Ian Maude]

On Sat, 2004-06-26 at 23:14, Don Brown wrote:
> Hi
>  
> This does not sound right. You should be able to get the voltage down
> to around a few mV. It seems like the several I have built would go
> down to 10 to 20 mV.
Well, guess what?  Yep, it was my fault!

I had disconnected the serial cable from the tuner but not from the K2.
The section from the K2 to the computer was left connected and the
computer was on.  I am guessing this caused the extra voltage.  All is
now well and thanks to those who responded.

Ian
>  
--
Ian Maude G0VGS Morecambe Lancs UK | [hidden email]
Sysop of GB7MBC, the Morecambe Bay Cluster
Running Linux and DXSpider | K2 #4044
 
Find out about Summits on the Air!  
Visit the SOTA web site at http://www.sota.org.uk

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