F2 for beginners

vitalstates · 23rd January 2007, 05:08 PM

Hello chaps

I am a refugee from the land of SET so please forgive the naive question..I'm an absolute newby with SS.

I want to build an F2 for my fostex folded voigts just to see what all the fuss is about. I have read the background on the F1 service manual and tried to understand the circuit that Nelson kindly supplied in the clone thread, BUT............

I can't see a +out on the diagram and as the ps is floating vis chassis via the thermistors, i couldn't make sense of it.

Can anybody enlighten me on this please.

Regards

Ed

Nelson Pass · 23rd January 2007, 06:56 PM

Since the circuit is inverting, the + output is ground and the
- output is the active output. Hook up the speaker that way
and it will work as intended.

Netlist · 23rd January 2007, 07:05 PM

Is there actually a difference as long as both speakers are connected equally (- to + or vice versa)?

/Hugo

vitalstates · 23rd January 2007, 07:12 PM

Many thanks for that, and again, apologies for the naivity.

Regards

Ed

GRollins · 23rd January 2007, 09:01 PM

Quote:

Originally posted by Netlist
Is there actually a difference as long as both speakers are connected equally (- to + or vice versa)?

/Hugo

Yes. It's subtle enough that most people don't notice or care, but it's there. It's most noticeable on something like a bass drum.

Grey

flg · 23rd January 2007, 10:04 PM

But, actually, might it be advisable to try both connections???

GRollins · 24th January 2007, 12:02 AM

No one will arrest you.
I promise.
But I cannot promise that they will not snicker behind your back.

Grey

23rd January 2007, 05:08 PM	#1
vitalstates diyAudio Member Join Date: Jan 2006 Location: uk	F2 for beginners Hello chaps I am a refugee from the land of SET so please forgive the naive question..I'm an absolute newby with SS. I want to build an F2 for my fostex folded voigts just to see what all the fuss is about. I have read the background on the F1 service manual and tried to understand the circuit that Nelson kindly supplied in the clone thread, BUT............ I can't see a +out on the diagram and as the ps is floating vis chassis via the thermistors, i couldn't make sense of it. Can anybody enlighten me on this please. Regards Ed

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23rd January 2007, 06:56 PM	#2
Nelson Pass The one and only Join Date: Mar 2001	Since the circuit is inverting, the + output is ground and the - output is the active output. Hook up the speaker that way and it will work as intended.

23rd January 2007, 07:05 PM	#3
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	Is there actually a difference as long as both speakers are connected equally (- to + or vice versa)? /Hugo

23rd January 2007, 07:12 PM	#4
vitalstates diyAudio Member Join Date: Jan 2006 Location: uk	Many thanks for that, and again, apologies for the naivity. Regards Ed

23rd January 2007, 10:04 PM	#6
flg diyAudio Member Join Date: Jul 2005 Location: North East	But, actually, might it be advisable to try both connections???

24th January 2007, 12:02 AM	#7
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	No one will arrest you. I promise. But I cannot promise that they will not snicker behind your back. Grey