[Hallicrafters] SX-100 MK2 info

[Anthony W. DePrato]

well trying to get the last of my receivers restored before i start on my 
transmitters.. pulled my working  SX -100 MK 2 out of the box and put on 
the bench today.
serial # 171639 and  Mark 2 serial  number on the  notch unit is  199719
my question is i have both an SX 100 and  SX 100 MK 2 book but this radio 
has an extra tube installed next to the 6bj7 det /anl/ave tube. it is a 
6by6  it is also connected to the  AM/CW SSB switch on the front..

now the radio works fine i am just going to replace the caps and a bad rf 
gain pot.. the only thing that makes me wonder if this is a factory mod 
/upgrade or not is that the extra socket is mounted to the chassie with 
screws and all the others are brads.
of course it would be faster to use screws instead of brads if this was a 
production change down the line after the chassie was punched and the 
sockets added.
was there a Mark 2A or a Mark 3 ?
thanks
73 Tony

QBE  ZUT  DE WA4JQS

ANTHONY W. (Tony) DePrato WA4JQS
Since 1962
CQ DX HALL OF FAME # 35
A1-OP      FISTS
South Sandwich Island Dxpedition Group
CALLS HELD:
WA4JQS/ZS1, WA4JQS/KC4, WA4JQS/4K1
ZD8JQS, V31SS,
VP8BZL, VP8SSI, 3Y0PI



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