Precision Fidelity - C7 Mods...help Wanted!

brianco · 18th December 2007, 10:50 AM

I have a Precision Fidelity C7 - in basic unmodified form. I want to bring it up to its highest spec. and would be grateful if anyone has a schematic to share for the 7A or REVISED model.

I will be using it with a Bent Audio MC Tx.(Silver) and a variety of power amps.

I will be very pleased to hear from anyone who has worked on this Pre.

Many thanks

Brian

Herrmann · 18th December 2007, 11:36 AM

Hi
Schematic of the C7A-Revised can be found here:
http://www.ys-audio.com
Torben

brianco · 18th December 2007, 01:49 PM

Very many thanks Hermann. That is just what I wanted!

Anyone got experience of these pre-amps? I had the C9 many years ago and wish that I still owned it!! I can't even remember where it went to, but do remember that the power supply was always causing problems when using a voltage drop transformer which gave as little as 110vac. But it DID sound good with an old Moscode!

Brian

brianco · 30th December 2007, 09:48 PM

Herrman kindly gave me a URL for a schematic for the C7 to C7A revision. I would very much like a copy of the C7 (Revised) schematic including it's power supply.

Can anyone help please?

Happy New Year

Brian

patferrari · 28th February 2008, 08:44 PM

The C-7A schematic on ysaudio is not accurate.

What do you need the schematic for?
I have all 3 schematics, and the mods.

Original Burnedfingers · 28th February 2008, 09:15 PM

I must be blind...I don't see schematics anywhere

brianco · 28th February 2008, 09:41 PM

Pat,

Many thanks indeed: rather than post a full reply I have sent you an email and look forward to your response.

Good luck,

Brian

brianco · 28th February 2008, 10:02 PM

Quote:

Originally posted by burnedfingers
I must be blind...I don't see schematics anywhere

burnedfingers,

Hermann, in post 2, above gave an address which gives the (incorrect) info.

Regarding your (apt?) board name I could be called burned table, carpet, well...virtually everything!

Brian

chevy_lvu · 26th March 2008, 07:16 PM

hi im a new member and cant email people??? im looking for a schematic for precision fidelity m-8 power amp. also a parts amp?? you can email me at skinnysteve_1@netzero.com I have two amps one works and the other needs help!!!please contact me with any info. steve Ellis

mcelaj · 30th May 2008, 12:39 PM

hi,

patferrari, brianco & others, if any, that has these schematics, i could really use all three schematics. my email is my username at gmail period com.

thanks a bunch.

18th December 2007, 10:50 AM	#1
brianco diyAudio Member Join Date: Aug 2005 Location: Scottish Borders - Kelso; on the famous Tweed River!	Precision Fidelity - C7 Mods...help Wanted! I have a Precision Fidelity C7 - in basic unmodified form. I want to bring it up to its highest spec. and would be grateful if anyone has a schematic to share for the 7A or REVISED model. I will be using it with a Bent Audio MC Tx.(Silver) and a variety of power amps. I will be very pleased to hear from anyone who has worked on this Pre. Many thanks Brian

30th December 2007, 09:48 PM	#4
brianco diyAudio Member Join Date: Aug 2005 Location: Scottish Borders - Kelso; on the famous Tweed River!	C7 (Revised) Herrman kindly gave me a URL for a schematic for the C7 to C7A revision. I would very much like a copy of the C7 (Revised) schematic including it's power supply. Can anyone help please? Happy New Year Brian

28th February 2008, 08:44 PM	#5
patferrari diyAudio Member Join Date: May 2006 Location: Metro St. Louis area	Precision Fidelity C-7 The C-7A schematic on ysaudio is not accurate. What do you need the schematic for? I have all 3 schematics, and the mods.

28th February 2008, 09:41 PM	#7
brianco diyAudio Member Join Date: Aug 2005 Location: Scottish Borders - Kelso; on the famous Tweed River!	Thank You... Pat, Many thanks indeed: rather than post a full reply I have sent you an email and look forward to your response. Good luck, Brian

26th March 2008, 07:16 PM	#9
chevy_lvu diyAudio Member Join Date: Mar 2008	precision fidelity hi im a new member and cant email people??? im looking for a schematic for precision fidelity m-8 power amp. also a parts amp?? you can email me at skinnysteve_1@netzero.com I have two amps one works and the other needs help!!!please contact me with any info. steve Ellis

18th December 2007, 11:36 AM	#2
Herrmann diyAudio Member Join Date: Feb 2002 Location: Denmark	Hi Schematic of the C7A-Revised can be found here: http://www.ys-audio.com Torben

18th December 2007, 01:49 PM	#3
brianco diyAudio Member Join Date: Aug 2005 Location: Scottish Borders - Kelso; on the famous Tweed River!	Very many thanks Hermann. That is just what I wanted! Anyone got experience of these pre-amps? I had the C9 many years ago and wish that I still owned it!! I can't even remember where it went to, but do remember that the power supply was always causing problems when using a voltage drop transformer which gave as little as 110vac. But it DID sound good with an old Moscode! Brian

28th February 2008, 09:15 PM	#6
Original Burnedfingers diyAudio Member Join Date: Nov 2002	I must be blind...I don't see schematics anywhere

30th May 2008, 12:39 PM	#10
mcelaj diyAudio Member Join Date: Nov 2003 Location: N/A	hi, patferrari, brianco & others, if any, that has these schematics, i could really use all three schematics. my email is my username at gmail period com. thanks a bunch.

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