[Drakelist] R-4C amp

[Neil M Califano]

Does the R-4C have a class A amp?


  

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[Drakelist] TR7 BCD stuff..GURU's beware

[Gypsymt34]

Hi all, 
Here is a chance for all of the gurus to shineAnyone got a good set of  
truth tables, for a Digital Control Board and a Translator Board
Original headache, never mind that there (still) is no sound . DR7  board 2 
Megs down.
 
Ok I'm going a little cockeyed.
Digital control Board to Translator board with the extenders and adaptor  
board in.  The adapter board is a pass threw  from everything I've  read, 
alleviating any headache with the DR7.
 
 
Using the example in the manual Pg 1-3 at 14+ megs its a "34"
Well I have a 28.5 M at 51...if this sounds right would someone let me  
know.  
But some writers definition of most significant vs least significant  
defies my logic...
 
In any case...28.5 M   Per the manual 41-44 least, 46-49 most  significant. 
(on the Translator Board)
Assumptions...< .5 V = LO  ;  > 4.5 V =  HI .   I was given a truth on the 
Trans board for 28.5M
 
DCBoard   (IS)   Translator  Board  
(IS)   -->Should Be
 
41   HI41 
LO  LO
42  1.8v   goofy42  HI  
  HI
43  1.8v "  43 
1.48v   goofy LO   
44  LO   .001  ?44 1.5v 
  " HI
 
45   HI  46   
LO LO
46   HI  47
LO LO
47   HI   48
LO  LO
48  LO   .000  ? 49HI   
HI  
 
 
Now if I switch to 14 M
 
41   LO  41  LO
42   LO  42  HI
43   LO 43   1.48v 
goofy  ...Note this goofy on all freqs
44   HI  44  1.51v  
  "      this too 
 
45   HI  46   HI
46   LO 47   HI
47   HI  48   LO
48   LO 49   LO 
   
 
 The question is Which Way Do I  GO ?  DCB or  Translator?  I'm getting 
tired and you can only cram so much education into  an old F..T during any 
specific time period.
Carl wd8nhk___
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[Drakelist] Drake T-4XC with Heathkit SB-620

[Eric Berty]

I would like to use the Heath SB-620 panoramic adaptor with the DrakeT-4XC, but 
have no 5.2 mhz coil.  Does anyone know who I can contact or get in touch with 
in obtaining this IF OSC coil?  I have seen the articles on the Heathkit coils, 
but what I have made so far, could be much better. 
 
Thanks,
 
Eric Berty W3EU   ___
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