[NJARC] AK help needed

Pete O via NJARC njarc at mailman.qth.net
Tue Mar 3 20:58:48 EST 2015


I don't have any schematics for that particulas AK but none of the caps are critical except for those involved in the RF tuning stages.  For any cap that is not connected directly to a tuning tank (RF/IF), you will do fine with RF/IF stages, a .001 to .010 and not critical.  In the audio stages you will be generally safe with .05 to .10 uuf.  I usually melt out any of the cap "cans" and simply refill them with modern caps and new color coded wires. A soldered common ground inside these cans helps tremendously.  Of course there will be a possible avalanche of criticism here but I've never been defeated by any of these old circuits, especially AK's.
These AK's were built with very un-critical values.  For filter caps, go ahead and use your bin stock of 10uuF-  these are far better than anything in the original design.  
The AK resistors are a nightmare to decipher.  You will be be best off using common sense values;  if you have any particular value question,  I'll try to figure it out and in the meantime get a schematic.  They are very simple radios.
Pete O  AI2V
      From: Bill <n2yeg at optonline.net>
 To: "NJARC at mailman.qth.net" <NJARC at mailman.qth.net> 
 Sent: Monday, March 2, 2015 11:19 PM
 Subject: Re: [NJARC] AK help needed
   
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Looking for data on the AK L2 chassis.  Found both  the Rider's and 
Beitman's on line, but the quality is poor.  Apparently Rider added 
component values to their schematic, but they're fuzzy.

The Rider is volume 1, pages 93 & 94; the Beitman is page 16 in the 
1926-1938 volume.

I'll be at this Friday's meeting if anyone can help.  Thanks


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