[IRCA] Eton E100 Serial Number Variations

[D1028Gary@xxxxxxx]

Hello Guys,
 
     With the growing popularity of the new Eton E100  modifications (Slider 
loopstick and Murata CFJ455K5 IF filter),  hobbyists should be advised that 
there are certain E100 variants that  are not suitable for either modification.  
Those directly involved in  designing or performing the modifications (John 
Bryant, Guy Atkins, Steve  Ratzlaff and myself) have been aware of this for 
some time, but new E100  purchasers should check their unit's serial number, 
before planning or ordering  any modification.
 
     Any E100 with a serial number of the  E10-0709xxxxxx series is NOT 
compatible with either the Slider loopstick or the  Murata IF filter modification.  
These units have a redesigned  loopstick among other major changes, and the 
AM performance is noticeably  inferior to the other E100 variants.  Photos of 
the RF circuit board,  loopstick and logo of these "non-standard" units have 
been posted by John  Bryant on the ultralightdx Yahoo group site.  If you have 
one of these  units, the popular modifications are not possible, and they 
should not be sent  to Steve Ratzlaff for filter jobs, or to any volunteers making 
Slider  loopsticks..
 
     Most of the E100's currently owned by  DXers (and reportedly all of the 
E100's still available from Durham Radio  in Canada) are of the type suitable 
for modification.  These  generally are either the E10-0704xxxxxx series, or 
the E10-0505xxxxxx  series.  Both of these groups are fully suitable for 
modifications, and  both work equally well as modified DX chasers.  The loopstick 
coils of  these two groups have slight variations, however, which result from a  
slightly different tuning capacitor in the variants.
 
     The E10-0704xxxxxx series E100's have more turns  of Litz wire in the 
stock loopstick coil, and perform best with a Slider  loopstick coil of 
approximately 63 turns of 40/44 Litz wire.  The  E10-0505xxxxxx series have fewer 
turns of Litz wire in the stock coil, and can  operate well with a Slider 
loopstick coil of 51 turns, although they will still  function well with a coil of 63 
turns (although the coil will slightly  extend over the edge of the bar while 
tuning some very high band  frequencies).  Detailed testing here has not 
revealed any variation in  sensitivity between a 63 turn Slider coil or a 51 turn 
coil in  the E10-0505xxxxxx variants.
 
     The modifications themselves work extremely well  in boosting up the 
E100's sensitivity and selectivity, and in combination they  are phenomenal in 
performance.  Before planning or ordering material for  modifications, however, 
please ensure that your E100's are of the  acceptable type, and can actually 
be transformed into legendary DX  chasers.
 
     73,  Gary DeBock 
 
 
 
       
 
 
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