Repairing The Venerable Crown DC 300

[mlucitt]

Yes, the DC300A manual I have is original. I'm still looking for a DC300 original instruction or service manual.

 

[mlucitt]

I am ordering the 25 each of MPSA06 and 2N3906 from Mouser (already have plenty of the 2N3439). Anything else look good on your substitution lists?

Original list re-posted for convenience:

DC300
Desig# - Device - Substitute
Q101 - TD101 - ?
Q102 - 2N3839A - MPSA06
Q103 - 2N5383 - 2N3906
Q106 - 40327 - 2N3439 positive pre-driver
Q114 - SS7304 or 2N4929 - ? negative pre-driver
CR101 - MZ2361 - ?
CR105 - 1N270 - ? (Germanium)
CR106 - MR2360 - ?
Q1 - MHT7698 - ? driver
Q2 - 2N3773 - MJ15024 (although the 2N3773 is stocked at Mouser)

DC300A
Desig# - Device - Substitute
Q103 - 2N4125 - 2N4125TF
Q104 - 2N6175 - ?
Q109 - 2N5804 - ?
D3 - 1N961B - 1N5240B 10V .5 W Zener
IC1 - uA739 or uA749 - ?