Counterpoint SA-1000

Cobra2 · 15th March 2008, 02:46 PM

I need some data on this unit; How much gain does the line-amp give, and how much the phono-amp give, in high & low position.
I have found that it can give a total(max) 70dB, but not specified...

Arne K

soundchaser001 · 16th March 2008, 02:50 PM

Hi There;
The information I have is that the high gain phono is 70dB (MC I guess); low gain is 58dB and line is 25 dB.

This info is from a partial manual that I have.

Matt

Cobra2 · 16th March 2008, 04:03 PM

Thanks!

A bit higher line-stage-gain than I need...

Any suggestions to improve this unit? And to lower gain?
- rewire/adjust to 5687 tube?
What lower gain tubes with 6DJ8 pin-out can fit?

Arne K

soundchaser001 · 16th March 2008, 04:24 PM

H There;

Be forewarned I'm not a tube expert by any means. Much more at home with solid state.

I'm not sure that simply changing the tube would do it. Maybe but I'd probably reduce the size of the resistor in the plate. It would be a good idea to do some SPICE sims on this to see the effects as well because you may also limit the O/P voltage swing if you're not careful.

25dB is nearly 18V/V gain and I too have no idea why anyone would want it so high. His (Michael Elliot) SA0-100 power amp is the same way. Too much gain and the driver to the MOSFETs is running a bit current starved. This is something else I would want to ook into when I get time.

Matt

15th March 2008, 02:46 PM	#1
Cobra2 DIY ! diyAudio Member Join Date: Apr 2002 Location: Stavanger, Norway	Counterpoint SA-1000 I need some data on this unit; How much gain does the line-amp give, and how much the phono-amp give, in high & low position. I have found that it can give a total(max) 70dB, but not specified... Arne K __________________ Ars longa, vita brevis

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
counterpoint Sa 5.1	max29	Tubes / Valves	289	18th May 2011 05:47 AM
Counterpoint SA-12	vsr123	Solid State	1	19th January 2009 01:13 AM
Can someone look at a Counterpoint SA7 for me?	240z4u	Tubes / Valves	0	27th June 2008 05:23 PM
Counterpoint SA-12	vsr123	Tubes / Valves	0	3rd July 2003 02:54 PM
Counterpoint	nickgreek	Solid State	0	22nd March 2003 07:04 AM

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

16th March 2008, 02:50 PM	#2
soundchaser001 diyAudio Member Join Date: Oct 2007 Location: Kanata	Hi There; The information I have is that the high gain phono is 70dB (MC I guess); low gain is 58dB and line is 25 dB. This info is from a partial manual that I have. Matt

16th March 2008, 04:24 PM	#4
soundchaser001 diyAudio Member Join Date: Oct 2007 Location: Kanata	H There; Be forewarned I'm not a tube expert by any means. Much more at home with solid state. I'm not sure that simply changing the tube would do it. Maybe but I'd probably reduce the size of the resistor in the plate. It would be a good idea to do some SPICE sims on this to see the effects as well because you may also limit the O/P voltage swing if you're not careful. 25dB is nearly 18V/V gain and I too have no idea why anyone would want it so high. His (Michael Elliot) SA0-100 power amp is the same way. Too much gain and the driver to the MOSFETs is running a bit current starved. This is something else I would want to ook into when I get time. Matt

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