Mystery (to me) phase inverter? - Page 2

Geek · 3rd October 2004, 06:28 AM

Heh, I think that's why Fred sent most of his stash to me. "Let's see what you can use them for", I believe were his words

Yvesm · 3rd October 2004, 08:44 PM

What could mean that numbers labelled with a triangle on the schemo ? AC peak or rms ?
32 at the driver anode and 3.6 at 6L6 grids ?
If dp missing, why 48 at 6L6 anodes ?

If square marked values are for DC, they are vy curious too !

Yves.

SY · 3rd October 2004, 10:21 PM

Quote:

Originally posted by Yvesm
What could mean that numbers labelled with a triangle on the schemo ? AC peak or rms ?
32 at the driver anode and 3.6 at 6L6 grids ?
If dp missing, why 48 at 6L6 anodes ?

If square marked values are for DC, they are vy curious too !

Yves.

Those look like AC voltages, but referenced to a certain input which doesn't appear on that schematic fragment. The 48V at 6L6 anodes indicates that the stage gain is about 13. The DC voltages look pretty normal to me- what caught your eye as unusual?

Yvesm · 4th October 2004, 06:03 AM

Quote:

Originally posted by SY

. . .
The DC voltages look pretty normal to me- what caught your eye as unusual?

If 1st half 12AX7 runs at 1mA (1 v accross 1K cathode res), then
there is 100v accross its plate res, and that calls for a 265v B+.
Right, since this is the 6L6 Vg2 too.

If so, how could the phase splitter have 280v on anode !

I just wanted to point that this schemo should be used with some caution.

Yves.

SY · 4th October 2004, 11:28 AM

Quote:

If so, how could the phase splitter have 280v on anode !

Good catch!

porkchop61 · 5th October 2004, 05:45 PM

Quote:

Originally posted by Yvesm
What could mean that numbers labelled with a triangle on the schemo ? AC peak or rms ?
32 at the driver anode and 3.6 at 6L6 grids ?
If dp missing, why 48 at 6L6 anodes ?

If square marked values are for DC, they are vy curious too !

Yves.

Yes triangles are AC signal voltages measured with a VTVM.
Squares are DC measured with a 20kOhm/Volt meter no signal.

Is there something wrong with this schematic? I'm new at this tube stuff, so please pass on any wisdom you may have.
I can post the whole schematic if you like. Just let me know.
Thank you.
Glenn

fdegrove · 5th October 2004, 11:18 PM

Hi,

Quote:

I can post the whole schematic if you like. Just let me know.

Please do.
As Yves pointed out there's something not quite correct with the voltages (DC) as shown.

Cheers,

porkchop61 · 6th October 2004, 11:16 AM

Here it is.
Thanks Frank.
Glenn

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
6J5 weird phase inverter	ThSpeakerDude88	Tubes / Valves	10	13th October 2008 03:11 PM
A very odd phase inverter- comments?	GordonW	Tubes / Valves	6	16th August 2008 02:05 PM
Phase inverter	ThSpeakerDude88	Tubes / Valves	37	29th August 2007 03:15 PM
6C8G phase inverter	engels	Tubes / Valves	4	4th February 2007 06:01 PM
What is the purpose of phase inverter?	RemoGaggi	Digital Source	3	6th December 2006 05:09 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

3rd October 2004, 06:28 AM	#11
Geek diyAudio Member Join Date: Sep 2004	Heh, I think that's why Fred sent most of his stash to me. "Let's see what you can use them for", I believe were his words

3rd October 2004, 08:44 PM	#12
Yvesm diyAudio Member Join Date: Jul 2004 Location: Ardeche	What could mean that numbers labelled with a triangle on the schemo ? AC peak or rms ? 32 at the driver anode and 3.6 at 6L6 grids ? If dp missing, why 48 at 6L6 anodes ? If square marked values are for DC, they are vy curious too ! Yves.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)