[ARC5] BC-453 Current Draw - measured at 60V B+ supply.

[Leslie Smith]

  Set in question.  BC-453-B, serial #3154.
  Condition:  well hacked, with LV choke missing, and all 'flower-pot'
  caps replaced by Mylar caps (sim. to greencaps, but brown).
  Screen divider pot completely removed, and screen supply connected
  directly to B+ supply.
  B+ Supply voltage  60.0 to 60.1 volts, measured by Fluke 123 scope
  meter.  
  Load:  garden variety (probably 32 ohm) 'cans'.  Common stereo type
  bought in a shop that sells 'stuff'.

  RF gain control fully CCW:    16.mA
  RF gain control fully CW        20.mA  (measured by my very nasty
  digital meter, but should be within 2%)

  So my set draws more current than Bill's set.
  (That's because he's above the equator, and I'm 'down under')

  But I think my set is 'typical', because I remember measuring the
  plate current WITH the two 7k dividers in place.
  I measured 20mA (but don't trust this - it's only memory!)

  That's 14k on 60V, or 4mA thru the divider.  4mA  20mA less 4mA (thru
  divider) = 16mA (what I get with the divider "out".


  73 de Les Smith
  vk2bcu at operamail.com



-- 
http://www.fastmail.com - Access your email from home and the web