SP 12 SE

[laatsch55]

Do I shoot him at the property line or let him get closer??

 

[speakerman1]

Little closer I think.

Larry

 

[laatsch55]

Till I can POSITIVELY identify him??

 

[laatsch55]

He has compared this Pre to a 3000.00 pre without my upgrades. The 14 is suppose to be like a 6000.00 pre.

Larry

How do they get that kinda money out of something with so little in it??

 

[speakerman1]

Design, advertising, the build. All cost money for one that is built already.

Larry

 

[speakerman1]

Answer.

it's the identical hookup as any other volume control, see photo near the bottom of this page . . . . http://tubes4hifi.com/DP.htm

Larry

 

[speakerman1]

Lee did that answer your question?

Larry

 

[laatsch55]

yes it did Larrt, thank you, I got it now. See, that site of his is for folks who know more about this than I do. As far as building stuff from scratch " it is identicakl in hookup as any other volume control" is not totally accurate, I've seen but not hooked up quite a few.

 

[laatsch55]

Ok, another question.Where is the choke wired to. No mention of it anywhere.

 

[speakerman1]

Email sent

Larry

 

[Skratch]

Lee, Usually the chokes go between the first and second filter caps in the B+ tube power supply. If its a tube rectifier the first filter cap should not be more than 40uf. I have not seen a choke in a tube preamp before but I see no reason why it wouldn't work. Keep it away from any low level signals because it is an inductor. Also there may be a jumper between the 1st and 2nd filter cap if a choke is not used, if there is it must be taken out. The choke should be the only thing between the 1st and 2nd filter caps. Look at a schematic of a Dynaco ST 70 or Mark3 and you will see how it is wired. Hope this helps.

 

[speakerman1]

Lee
You have an email.

larry

 

[laatsch55]

Just got in from work. I'll check the e-mail.

 

[laatsch55]

That wiring diagram helps a bunch. Just what I needed.

 

[laatsch55]

A lot of progress. May get it tonight.

 

[speakerman1]

Very Cool. Is it heavy?

Larry

 

[laatsch55]

Yes, for a pre----very.

 

[mlucitt]

But no tone controls to compensate for room acoustics?

 

[speakerman1]

But no tone controls to compensate for room acoustics?

What?

Larry

 

[laatsch55]

The moment of truth.......did he or didn't he???