Accuphase e202 Eq amp 2sc1451 replacements
- Thread starter reddish75
- Start date
Register to hide this ad
KSC2690AY
Nothing at all wrong with that one either, except B&D is the only trustworthy source and they seem to think these devices are made out of ****ing platinum.
Ronge
New Member
Sorry to resurrect this old thread but is the KSC2690AY still a good replacement for the 2SC1451 in an E-202, specifically the phono stage, or are there better alternatives?
My E-202 is currently being completely overhauled and the tech ran into some issues with these and I'm just trying to help out.
Thanks in advance!
My E-202 is currently being completely overhauled and the tech ran into some issues with these and I'm just trying to help out.
Thanks in advance!
restorer-john
Addicted Member
What's wrong with the 2SC-1451s? Has your tech actually tested them? Does he have a curve tracer?
Japanese transistor substitution manual puts 2SC-1628, 2SC-1903 or a 2SC-3800 all as subs. Bear in mind you want the lowest noise rank (G/GR equiv) for anything phono and he should buy a bag and match them.
Personally, I wouldn't let anyone near my E-202 who couldn't find a transistor or an equivalent. It's a warning sign he has no idea what he is doing.
Ronge
New Member
Thanks for your reply, I appreciate it!
Since they're known for causing problems, they will get replaced. Indeed he has, on both questions. This is what he said:
"I dug seven out of the jar. I ran my transistor tester and took curves on all of them. Some were broken, others were completely wrong in their values. But I managed to find two with the right values and they were very similar to each other. I replaced one of the transistors and that channel started working right away."
Even though the two he found might work for now, they're ticking timebombs plus it's a complete restauration of the amp so would prefer to have them replaced as well.
It seems most substitutes are obsolete, hence my resurrection of this thread, since the one mentioned here actually isn't obsolete.
I use KSC3503
EDIT: Sorry I didn't know that KSC3503 is gone. KSC2690AYS still can found on digikey. I had used it on pioneer but be sure it works and don't oscillate due bigger Cob.
TTC004B might work too.
Code:
2SC1451 KSC2690AYS TTC004B
---------------------------------------------------------------------------------------------------
Polarity NPN NPN NPN
Package / Case TO-5 / CAN-3 (Metal) TO-126 (Plastic) TO-126N (Plastic)
Vceo (Max Voltage) 150V 160V 160V
Vcbo (Base Voltage) 160V 160V 160V
Ic (Current) 50mA - 100mA 1.2A (Much higher capacity) 1.5A
Pd (Power) 800mW 1.2W (Free air) / 20W (HS) 10W (at Tc=25°C)
hFE (Gain) 40 - 240 60 - 320 140 - 280 (at 100mA)
fT (Frequency) 100MHz - 130MHz 155MHz 100MHz
Cob (Capacitance) ~2.0 - 4.0 pF 19 pF (Typical) 12 pF (Typical)
---------------------------------------------------------------------------------------------------
Last edited:
