[Elecraft] K2 - VCO-Test (Alignment an d Test, Part II)

[Don Brown]

Hi

The usual problem with the VFO is T5 not making proper connection due to =
improper stripping of the leads or T5 is wound improperly. Double check =
that both T5 windings are wound exactly like the drawing. The start and =
finish must be on the sides of the toroid shown. Make sure you stripped =
the wire up to the core. The core is not conductive so it is OK for some =
bare wire to touch the core. If you did not strip the wire up far enough =
when you pull the wire tight you will pull the insulated part into the =
pad and get a bad connection. The note to add a turn relates to the =
voltage on R30 not quite making it to 6 volts. You should get the VFO =
working then if you can not bring the voltage at R30 into range try =
squeezing the turns together or spreading the apart until the voltage is =
correct. If you can not bring it into range then rewind the transformer =
adding one turn.

Don Brown
KD5NDB
  ----- Original Message -----=20
  From: David Broger=20
  To: elecraft@mailman.qth.net=20
  Sent: Friday, August 15, 2003 4:15 PM
  Subject: [Elecraft] K2 - VCO-Test (Alignment an d Test, Part II)


  Hello
  I am assembling a K2 (#3613). I have a problem with the VCO-Test as
  described on page 57 of the manual. The freqzuency counter (K2) shows =
me
  about 1.3MHz and not 8-10MHz. The frequency is not stabil - it changes =
very
  quickly about +/-10 Hz. When I tried to adjust the Voltage at R30 I =
got
  constantly 8.2V. I can turn on L30 - there is no effect. I read =
something to
  add on turn at t5 primary-winding. I made t5 as shown in the manual.
  Has somebody more information to solve this problem?

  Best reagards
  dave hab9rvs


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