News:
September 25, 2023, 02:49:21 AM

Author Topic: Resister Sanity Check  (Read 626 times)

0 Members and 1 Guest are viewing this topic.

Offline IntarsiaGuy2

  • Jr. Member
  • **
  • Posts: 10
Resister Sanity Check
« on: April 05, 2022, 10:05:24 AM »
Based on the instructions on page 31, I would expect the 2.49K resister (no wattage mentioned - assuming 1/4 watt) would be smaller than the 220K 1W resister in the next step.  They are the opposite - the 2.49K resisters are large and look like 1 watt resisters.  The 220K resisters look like 1/4 watt.  (I measured the resistance to double check my color reading).  Just want to confirm this is correct before I continue.  Thanks.

Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 18655
Re: Resister Sanity Check
« Reply #1 on: April 05, 2022, 10:31:44 AM »
The 2.49K resistors that we used for eons became tough to get because of supply issues, so we have a different part substituted (it's still a nice Vishay/Dale part).  It is indeed physically larger than the 220K resistors, which are somewhat smaller than might be expected for their power rating.  (The 220K resistors dissipate under 1/4W in operation, so the demands are pretty low)
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline IntarsiaGuy2

  • Jr. Member
  • **
  • Posts: 10
Re: Resister Sanity Check
« Reply #2 on: April 05, 2022, 10:38:03 AM »
Thank you for the quick reply.  Onward!