[Techtoolslist] [Vectorlist] Updating - W-G 6100 Vector Monitor FAQ & Guide V1.1

[colin.w.davies]

Bd237 and Bd238 seem to work well but you have to shuffle the legs around.  (Think pin 2 and 3 are swapped). Cheap and easy to find.Sent from my Galaxy
-------- Original message --------From: John Robertson <jrr at flippers.com> Date: 06/12/2023  22:26  (GMT+00:00) To: "Discussons of vector-based arcade games." <vectorlist at lists.vectorlist.org> Cc: techtoolslist at flippers.com Subject: [Vectorlist] Updating - W-G 6100 Vector Monitor FAQ & Guide V1.1 
    Who is maintaining this?
    I ask because on page 8 there is a typo - that I've only just
      realized when I was going through trying to update my WG monitors
      as we have a pair of SWs that are running WGs (with the LV2000
      kits).
    It says "R701 (1.3K) changed from +/-2%, 1/4W to +/-1%, 5W.(*)"
    That can't be right, I am certain it should instead say:
    "R701 (1.3K) changed from +/-2%, 1/4W to +/-1%, 0.5W.(*)"
    and it would be clearer with:
    "R701 (1.3K) changed from +/-2%, 1/4W to +/-1%, 1/2W.(*)"
    It makes no sense otherwise. There simply can't be enough current
      for a 5W resistor as this is ground biasing the base of a small
      signal transistor.
    Then there is the question of Q604/Q704 (MPSU07) transistors
      upgraded to TO-202 (NTE-49) which looks like another problem as
      there is no NTE-49 and hasn't been for decades. That was the same
      as the ECG-49, which was a NPN-Si, 125Vcbo, 2A, Gen Purpose
      TO-202. Anyone have a workable replacement to save me the lookup
      time? 
    
    I'm thinking a Rv1.2 is overdue...
    John :-#)#
    
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