[Elecraft] K2 Question - control board

Thu Feb 5 08:54:00 2004

Hi

Be careful with analog meters like the Simpson 260, Triplett meters or =
copies of them. The ohms ranges use a high voltage battery for all of =
the upper ranges and a 1.5 volt D cell for the lowest ohms range. The =
high voltage battery is usually a 15 or 22.5 volt battery but I think I =
remember seeing a 67.5 volt battery in some meter I worked on years ago. =
The upper ranges could damage some semiconductor circuits by exceeding =
their breakdown voltage or the low ohms range could damage the circuit =
by passing too much current through the circuit. DVM's limit the current =
to about 1 mA and the voltage is around 3 or less volts on the ohms =
ranges.

Don Brown
KD5NDB
  ----- Original Message -----=20
  From: Henry Gardiner<mailto:[email protected]>=20
  To: [email protected]<mailto:[email protected]>=20
  Sent: Thursday, February 05, 2004 7:26 AM
  Subject: Re: [Elecraft] K2 Question - control board

  =20
  Snip

   You could also blow the dust off ye olde analogue VOM.

  Henry =20

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