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Do you mind sharing a pic of the insides of the 300b amp? It looks very nice!
That post is over 3.5 years old though. They did update their drivers in 2016. I guess that came with price increases as well.
Interesting. Where did you find that info?
They're also replacing the earpads on my XC's btw. They did not replace those on my LCD-3's.
I wonder if they have a policy on who pays for return shipping. My LCD-XC's recently broke and I payed $500 for driver replacements + an extra $50...
Correct! They arrived to me with a failed driver. But those were under warranty. Not so lucky this time. At least the LCD 3 holds up so far.
Looks like I'll be upgrading the drivers after all! Got a driver failure yesterday :(
$500 + shipping down the drain, 6 month out of warranty.
Good job baron! It’s nice to see that you’re going at it!
Hey, now I recognize it. It's basically a filament reg with a different FET and fixed resistors instead of trimmer. Also much lower value for C4.
I’ve seen tubes for sale here https://www.head-fi.org/forums/cables-speakers-accessories-for-sale-trade.6553/page-2
Now I choose tubes based on linearity, gain and looks. I don’t build amps for tube rolling.
No problem baron!
You're right! Started my forth build just recently.
Only 6SL7 with the CCS installed. ECC35 and 6C8G (with adapter) would also work, but 6SN7 would not be happy at 1.2mA of bias current.
Good work baron!
I don't think there's anything you can do to the ps(s) without extending the chassis or have a external chassis for the...
Ok, all good then!
Measure bias voltage at cathode node. Should read slightly higher at boot before the B- supply starts, then go to normal.
Wheres your B-...
Switch it on! :)
I can't see if all connection are correct though as I'm on thr phone. But I'm sure you're fine if you double and triple check!...
Yes, ground connection for driver stage B+ decoupling.
No, its connected to the pcb ground plane. Measure with ohm meter if you're unsure.
Baron is referring to top of anode resistor, so B+.
No, because the cathodes are not grounded. Cathode node will be at about 1V.
You can connect the decoupling cap lead in the same ground hole as...
I’m glad you got it sorted Baron!
The 68 ohm resistor is a current limiting resistor. So not to damage the backlights at startup.
Right! I still have a NOS quad (+ 1 spare) WE421A.
If you're interested shoot me a pm.
Yes, there is! The 5998!
I really love this amp but I'm having too much fun with my DIY amps. Can't keep everything sadly, too little time.