Audio Note Kits Forum

Cathode Foiiower

68.226.139.153

In Reply to: RE: CS8412/14 upgrade posted by Tom R on January 11, 2008 at 20:31:55

Just so you know I an not a engineer so what I describe hear is correct to the best of my knowledge, but others may have a different opinion. Anyway….

As I stated, I scrapped the original output board in favor of transformer output stage. I purchased from AN Output Transformer number 011/01-A to be the heart of the new output stage. AN OPT number 011/01B can also be used, this is a better OPT but also the cost is almost double.

I also used a 6N1P as an output tube, it is a duel triode. So I parallel the two sides together for each channel.

Cathodes pin # 3 and 8 were tied together. From ground I added a 180ohm Tantalum cathode resistor, bypassed with a 470uF black gate cap. This resistor/cap feed the two Cathodes tied together. This will give 12mA to the tube or 6mA per side.

Signal from the digital board is fed to grid pins 2 and 7 – with 120 ohm grid “stopper resistors”

The two anodes pins 1 & 6 are tied together and are connected to the OPT transformer 160 VDC B+ supply coming through a LCLC network from the power supply board.

Very simple design with no caps in the signal path. Works great.

Tom R.

Follow Ups:

RE: Cathode Foiiower - GTCharlie 18:19:10 01/18/08 (0)

Post a Followup:

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.