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Re: Look here for 12B4 line stage info! [message #31807 is a reply to message #31804]

Thu, 09 March 2006 14:45

PakProtector
Messages: 935
Registered: May 2009

Illuminati (2nd Degree)

Hey-Hey!!!,
I took some part in that discussion. I just resurrected my first pre as a resistive plate loaded 12B4. With B+ of only 170V, I ran a 10k plate load at 10 mA with 4 red LED's for biasing the cathode. Piddling 1 uF coupling caps too.

It sounded really good, but it was a bit more prone to hum than with the CCS. I had to beef up the PS capacitance( 120 uF/330V salvaged photo flash caps from disposable cameras ).
cheers,
Douglas

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[Message index]

		Say Doug; how would you go about.. By: Manualblock on Sun, 05 March 2006 12:19
		Look here for 12B4 line stage info! By: Norris Wilson on Mon, 06 March 2006 04:35
		Re: Look here for 12B4 line stage info! By: Manualblock on Mon, 06 March 2006 06:28
		Re: Look here for 12B4 line stage info! By: PakProtector on Thu, 09 March 2006 14:45
		Re: Look here for 12B4 line stage info! By: Norris Wilson on Thu, 09 March 2006 18:38
		Re: Look here for 12B4 line stage info! By: PakProtector on Fri, 10 March 2006 04:02

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