[ARC5] TM ident for BC-946, please

[Leslie Smith]

  Good-morning list readers,
  I have a well-hacked BC-946 I'm seeking to restore to working
  condition.
  Can any-one advise the series that the BC-946 belongs to, and/or the
  TM manual for this series?
 Good-morning list readers,
  I have a well-hacked BC-946 I'm seeking to restore to working
  condition.
  Can any-one advise the series that the BC-946 belongs to, and/or the
  TM manual for this series?

  This set has seen a good deal of work by some-one with side-cutters.
  Everything under and over the dyno plate is missing.
  The detector is now a 6H6 and the 12A6 has been replaced by a triode.
  Does any-one remember a "mod" where this was done.
  (Also, the output transformer is missing.   I'll try a 240 .. 12v
  filament transformer as a replacement and advise the result.  Will the
  D.C. in the plate circuit saturate the transformer core?  The world
  holds it's breath in anticipation of the answer.)  
  
  The filaments in the set are wired in parallel.
  Has anyone seen an original BC-946 with the filaments wired for 12
  volts?
  As an additional point difference all the "tubes" are 6 volts types,
  so - as I got it - the set is meant to operate from a 6v filament
  supply.  I suppose that somewhere in the past some-one had a 6 volt
  filament transformer and decided to use that.

  Most of the circuit in front of the detector seems intact, apart from
  the fact that two of the four tag-strips are missing.
  Anyway, this set is so far from original it can only be restored to
  functional.
  The top deck and rear panel of the dyno area are cut away, so I'll
  need to fabricate two Al plates to cover the damage. 

  With careful work the set can will work and look cosmetically
  acceptable.


  73 de Les Smith
  vk2bcu at operamail.com  It's not part of the SCR-274N series, and I
  don't even know the meaning of "ZB".

  This set has seen a good deal of work by some-one with side-cutters.
  Everything under and over the dyno plate is missing.
 Good-morning list readers,
  I have a well-hacked BC-946 I'm seeking to restore to working
  condition.
  Can any-one advise the series that the BC-946 belongs to, and/or the
  TM manual for this series?

  This set has seen a good deal of work by some-one with side-cutters.
  Everything under and over the dyno plate is missing.
  The detector is now a 6H6 and the 12A6 has been replaced by a triode.
  Does any-one remember a "mod" where this was done.
  (Also, the output transformer is missing.   I'll try a 240 .. 12v
  filament transformer as a replacement and advise the result.  Will the
  D.C. in the plate circuit saturate the transformer core?  The world
  holds it's breath in anticipation of the answer.)  
  
  The filaments in the set are wired in parallel.
  Has anyone seen an original BC-946 with the filaments wired for 12
  volts?
  As an additional point difference all the "tubes" are 6 volts types,
  so - as I got it - the set is meant to operate from a 6v filament
  supply.  I suppose that somewhere in the past some-one had a 6 volt
  filament transformer and decided to use that.

  Most of the circuit in front of the detector seems intact, apart from
  the fact that two of the four tag-strips are missing.
  Anyway, this set is so far from original it can only be restored to
  functional.
  The top deck and rear panel of the dyno area are cut away, so I'll
  need to fabricate two Al plates to cover the damage. 

  With careful work the set can will work and look cosmetically
  acceptable.


  73 de Les Smith
  vk2bcu at operamail.com  The detector is now a 6H6 and the 12A6 has been
  replaced by a triode.
  Does any-one remember a "mod" where this was done?
  What is the advantage of a triode output stage?

  (Also, the (12A6) output transformer is missing.   I'll try a 240 ..
  12v filament transformer as a replacement and advise the result.  Will
  the D.C. in the plate circuit saturate the transformer core?  The
  world holds it's breath in anticipation of the answer.)  
 Good-morning list readers,
  I have a well-hacked BC-946 I'm seeking to restore to working
  condition.
  Can any-one advise the series that the BC-946 belongs to, and/or the
  TM manual for this series?

  This set has seen a good deal of work by some-one with side-cutters.
  Everything under and over the dyno plate is missing.
  The detector is now a 6H6 and the 12A6 has been replaced by a triode.
  Does any-one remember a "mod" where this was done.
  (Also, the output transformer is missing.   I'll try a 240 .. 12v
  filament transformer as a replacement and advise the result.  Will the
  D.C. in the plate circuit saturate the transformer core?  The world
  holds it's breath in anticipation of the answer.)  
  
  The filaments in the set are wired in parallel.
  Has anyone seen an original BC-946 with the filaments wired for 12
  volts?
  As an additional point difference all the "tubes" are 6 volts types,
  so - as I got it - the set is meant to operate from a 6v filament
  supply.  I suppose that somewhere in the past some-one had a 6 volt
  filament transformer and decided to use that.

  Most of the circuit in front of the detector seems intact, apart from
  the fact that two of the four tag-strips are missing.
  Anyway, this set is so far from original it can only be restored to
  functional.
  The top deck and rear panel of the dyno area are cut away, so I'll
  need to fabricate two Al plates to cover the damage. 

  With careful work the set can will work and look cosmetically
  acceptable.


  73 de Les Smith
  vk2bcu at operamail.com  
  The filaments in the set are wired in parallel.
  Has anyone seen an original BC-946 with the filaments wired for 12
  volts?
  As an additional point difference all the "tubes" are 6 volts types,
  so - as I got it - the set is meant to operate from a 6v fila
  Good-morning list readers,
  I have a well-hacked BC-946 I'm seeking to restore to working
  condition.
  Can any-one advise the series that the BC-946 belongs to, and/or the
  TM manual for this series?

  This set has seen a good deal of work by some-one with side-cutters.
  Everything under and over the dyno plate is missing.
  The detector is now a 6H6 and the 12A6 has been replaced by a triode.
  Does any-one remember a "mod" where this was done.
  (Also, the output transformer is missing.   I'll try a 240 .. 12v
  filament transformer as a replacement and advise the result.  Will the
  D.C. in the plate circuit saturate the transformer core?  The world
  holds it's breath in anticipation of the answer.)  
  
  The filaments in the set are wired in parallel.
  Has anyone seen an original BC-946 with the filaments wired for 12
  volts?
  As an additional point difference all the "tubes" are 6 volts types,
  so - as I got it - the set is meant to operate from a 6v filament
  supply.  I suppose that somewhere in the past some-one had a 6 volt
  filament transformer and decided to use that.

  Most of the circuit in front of the detector seems intact, apart from
  the fact that two of the four tag-strips are missing.
  Anyway, this set is so far from original it can only be restored to
  functional.
  The top deck and rear panel of the dyno area are cut away, so I'll
  need to fabricate two Al plates to cover the damage. 

  With careful work the set can will work and look cosmetically
  acceptable.


  73 de Les Smith
  vk2bcu at operamail.comment supply.  I suppose that somewhere in the past
  some-one had a 6 volt filament transformer and decided to use that.

  Most of the circuit in front of the detector seems intact, apart from
  the fact that two of the four tag-strips are missing.
  Anyway, this set is so far from original I can only restore it to a
  functional condition.
  The missing tag-strips may present a problem.  Most stages have a low
  value decoupling resistor in the plate circuit (a few hundred ohms)
  with a C by-pass to common.  Has any-one had experience running a set
  without the decoupling?
  If I don't replace these (remember the tag-strips are missing!) will
  the set oscillate at the RF (or I.F.) frequency)?

  The top deck and rear panel of the dyno area are cut away, so I'll
  need to fabricate two Al plates to cover the damage. 

  With careful work the set can be made to work work and look even look
  cosmetically acceptable.
  I'll have a useful Q5-er when the work is finished and I'll know a LOT
  more about these sets.


  73 de Les Smith
  vk2bcu at operamail.com

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