[Amps] How to Bypass TR circuitry in Alpha 86

[Mark - N5OT]

I think you guys are discussing something unrelated to my inquiry.

73 - Mark N5OT



On 2/14/2020 8:14 AM, Jim Thomson wrote:
> <The biggest stations run (at least) two radios on each band, one "running" (calling CQ) and the other in S&P mode (tuning up and down the band for <multiplers).
> <http://k9yc.com/Multi-Station.pdf provides an overview of all of the mechanisms that can couple RF between stations.
> <73, Jim K9YC ##  I read  the  pdf.   Mark  is  referring  to  FULL  DUPLEX...with  TX  and  RX,  simultaneously..on  the  SAME  freq.Per  your PDF,  that  would  require  2 x yagis,  several  hundred  feet  apart,  with  booms  parallel to  each  other.  That  only  would  work In  2 x directions.  Ditto  with  perhaps 2 x dipoles  end  to  end...and  several  Hundred  feet  apart.BP  filters,  stubs  etc,  dont  enter  into  the  equation.   What  about  all  the other  directions ?? ##  what  if  a single  vertical  is  used  on...  say  160/80/40m ...and  a  2nd  vertical / dipole  for  RX??   I  find  the  concept  of  full duplex on  <5  acres, really  hard  to  believe. The signal  intensity on  ground  wave  for  verts  is intense.  ##  when  I  was a commercial  radio  op  back  In  1974,  the  TX  +  RX  ants  were  10  miles  apart,  hence  full  duplex  on 400-500  khz cw.    ##  Buddy  of  mine was  75m  mobile...coming  over  to my   home.  I  just  about  did  In  the
>    front  end  of  his  poor  Icom.I  shut  it  all  down,  asap, when  he  was  1400 feet  down  the  street. ##  older  ham,  across the  street  from  my  folks  home,  back  In  the  70s,  would  know  asap  when  I was  on  the  air.  Hiswatt meters,  rf  ammeters,  you  name it,  would  dance  up  +  down...with  all his  gear  shut  off. Jim  VE7RF
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