[R-390] Z503 Replacement

[ToddRoberts2001 at aol.com]

In a message dated 4/2/2011 4:29:36 P.M. Eastern Daylight Time,  
drewrailleur807 at yahoo.com writes:

"To match the low Q of the original inductor a resistor could be placed in  
parallel with the Mouser inductor and
cap tuned circuit to lower the Q  down to the 25-50Q range which should work
very close to the original Z503  circuit."

Todd, this is good work you have done.  You have called  out the values and 
configuration required and this should make for easy  duplication by those 
who would wish to fabricate an inexpensive Z503  replacement.

Drew
 
Hi Drew,
I was hoping that posting the values of the components inside the Z503 will 
 make it easier for someone
to build a replacement. The next step will be to pick up some off-the-shelf 
 parts from Mouser and
put together a working Z503 so anyone can build one for a few  bucks using 
matching part numbers and get consistent performance.
 
73 - Todd WD4NGG