[ARC5] Aligning BC-453-B. (Solved) Benefit from repairing a 'junker' (long)

[Leslie Smith]

  Hello David,
  Working on a wrecked set is a very educational process.
  I dealt with:  Lots of dirt.  Missing B.F.O.  box.  Restoring the
  wiring around the 12A6 and filaments.
  Re-capping.  Intermittent L.O.  Misaligned RF box.  Large choke
  missing.  
  Dial alignment pin missing.  Carbon resistors 'going high'.
  Every item on my list has been discussed here, and is well known.  
  However, actually dealing with these teaches much more than merely
  reading about it.

  The biggest reward comes from learning to read the manual.
  Actually working on a set is, I think, the best way to become familiar
  with it
  (Other list-readers will understand this, as you do, but I'm still
  learning.)

  TUNING/DAIL
  In the past I saw the index pin (or alignment 'pip' as I called it).
  Function = obvious.  Then I got this set.  It has a plastic dial. 
  Interesting, given the ser. nr is 3154.
  (O.N. = 595, W.F. 1943.  I suspect the set was made that year.)
  So the dial (I think) is a 'ring-in'.   Anyway, the place where the
  plastic pin broke off isn't obvious.
  I described earlier how I aligned the dial to frequency, and I have 2
  points that are "on-frequency" (210 and 520kHz).
  (I found the description for alignment - that's a useful piece of
  information.)  
  I have used ALL the adjustment available in the padding cap, but since
  the dial and frequency match, I am content.

  Also, since I have the two aligned, AND the nut tightened, that's it!
  I'm not undoing that nut - not even for ice-cream and custard!

  My next task will be to align the RF stage.  The small variable "C" 
  (control on F.P. lower left) isn't connected.
  (I have to wonder why anyone would disconnect THAT).

  To recapitulate:
  I've done things with this I WOULDN'T DARE with a good set.  That's
  the benefit of an old set.
   It gave me the courage to use the garden hose and "Dot's bath & tile
   cleaner."
  Maybe my trouble later (with the LO) came from 'the washing'.  So
  what?  It's working now!

  All this reinforces my belief that actual 'hands on' is the best
  educational method.
  Thanks for your interest.

  73 de Les Smith
  vk2bcu at operamail.com


On Thu, Jan 29, 2015, at 23:01, David Stinson wrote:
> 
> I guess I don't understand the problem with the 
> pin/dial thing.
> Aligning the pin-index hole in the dial with the pin socket 
> on the capacitor is essential for a successful alignment.  
> You can't "by guess and by golly" this one.
> This shouldn't be a problem unless one has difficulty
> with his vision, and some of us do.
> The hole in the dial and the pin socket-even if the pin
> is broken-off in it, should be readily visible.
> Clean the two surfaces.  Put a touch of silicone glue 
> on one surface- just a dab is enough.  Attach the dial
> and align the pin holes.  Let sit overnight.
> It will stay and, if need be, come off without damage.
> 
> 73 Dave AB5S
> 
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