Newest Amplifier Design by Kang Su Park - The Allnic M-2500 Monoblock

ketcham

Industry Expert
Feb 29, 2016
176
118
150
Hi Bill,

The U52 rectifier which is what I use in the PX25, yes there would be issues. But the circuit designed by KS with 5U4G - no issues at all. The U52 sometimes has an issue with the 300B, so we changed the tube complement accordingly.
 

Wrm57

Well-Known Member
Oct 30, 2012
25
11
243
Thanks, John. What are the drop in replacements for this 5U4G in this circuit? I have a sizable collection of rectifiers -- 5AR4, 5R4GY -- assembled, in part, for my H3000. Will they also work in the M-2500?
 

ketcham

Industry Expert
Feb 29, 2016
176
118
150
KS Park firmly insists in use on the direct heated 5U4G rectifiers only.
 

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