[NJARC] Atwater Kent question

[Al Klase]

Joe,

Yes, there should be three B+ connections:  22.5 to the detector, 90 to 
the output tube via the speaker, and 67.5 to the RF amps and first audio.

Good luck,
Al

TrainBee at aol.com wrote:
> Visit our web site - See http://www.njarc.org
> _______________________________________________
>   
> ------------------------------------------------------------------------
>
>  
> Hello Al,
>     You were right, the wires were hopelessly  faded.  Using the schematic, I 
> replaced each with the same color up to  using a solid Green in place of a 
> Green with a yellow trace.  The matter of  the Green with Yellow trace comes 
> from the hook-up tag that came with the  radio.  (original tag from Atwater Kent, 
> June 1926)
>     So here is the bottom line, I just wanted to verify  that the voltages.  
> The Nostaglia Air  (Riders schematic ?) shows no  voltages, Beitman's shows 
> only 2 voltages and the schematic I found from the  W3NLB Atwater Kent site 
> gives a 90v B+ voltage, 22½ v and 67½ v (I am guessing  B+ voltage), -4½ v C, and 
> -6v A voltage.  
>     Al, I just want to make sure that I put the right  voltage into this 
> radio and don't fry 6 good 01A's.  All of the coils are  good along with the 
> transformers.  I only had to replace two caps, the grid  leak resistor and one 
> other resistor.  Everything else checked out  OK.  In the end, if a part looked OK 
> and passed the test, it was  not touched.
>     If you would like me to bring it on Friday night,  let me know.  I can 
> bring the power supply and speaker to try it out.
>  
> Regards and thanks,
> Joe
>  
>  
> In a message dated 2/5/2007 9:36:21 PM Eastern Standard Time, al at ar88.net  
> writes:
>
> Visit  our web site - See  http://www.njarc.org
> _______________________________________________
> Hi  Joe,
>
> The metal weight will normally go on the detector tube to damp out  
> microphonics.
>
> I'm not sure I understand the rest of the question.  Can you tell which 
> wire is which color? They're often hopelessly  faded.
>
> Standing by,
> Al
>
> TrainBee at aol.com wrote:
>   
>> Visit  our web site - See http://www.njarc.org
>>  _______________________________________________
>> I have the AK Model 30  back together and ready to go.  Can someone  verify 
>> the  voltages I should be using and on which tube the metal cap goes   on.  
>>  
>>     The schematic I am using  calls for the following  voltages:
>>  
>> A+     0        Red     (  A+ and B -  )
>> A  -    -6v      Black  
>>  B+    90v     Brown
>> B  -     0        Red
>> B+   67½v    White  
>> B+   22½v   Yellow  
>> C  -    4½v    Green or Blue  depending  schematic
>>  
>>          
>>     Current information  sources:     W3NLB schematic, Nostaglia Air, and  
>> Beitmans.
>> I have a  battery eliminator that can supply adjustable A voltage,  fixed 
>>     
> +22,  
>   
>> 45, 67, 90, 135 and adjustable C voltage.
>>  
>>  Thanks again in advance for your help.
>> Joe Devonshire
>>  _______________________________________________
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>> NJARC at mailman.qth.net
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>>
>>    
>>     
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-- 
Al Klase - N3FRQ
Flemington, NJ
http://www.skywaves.ar88.net/