[R-390] Z503 Replacement

[Drew P.]

On his development of a Z503 replacement, Todd wrote:

[snipped]

"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