[Vintage-Audio] Tube amps with no load

Sun Mar 2 22:13:00 2003

Robert, 	

It is apparent that you do not understand the principals at work. Rather than
pursue this and possibly embarrass you by one of the more technically versed
guys pointing out the errors in your thinking, and feelings getting hurt, I have
asked an indifferent third party with over forty years of hands on electronic
experience to draft a simplified explaination of why and how capacitors are
reformed. Additionally, he will address the topic of rectification. I will post
his remarks on Monday March 3rd. 	

Duane Fischer, W8DBF	

----------
From: Robert  J.  McKee <[email protected]>
To: [email protected]
Subject: Re: [Vintage-Audio] Tube amps with no load
Date: Sunday, March 02, 2003 8:43 PM

But without the rectifier tube there will be no DC at
any potential... so once again.  Why bother???

----- Original Message -----
From: "Duane Fischer, W8DBF" <[email protected]>
To: <[email protected]>
Sent: Sunday, March 02, 2003 8:12 PM
Subject: Re: [Vintage-Audio] Tube amps with no load

> You remove the rectifier tube OM -
>
>
>
> ----------
> From: Robert  J.  McKee <[email protected]>
> To: [email protected]
> Subject: Re: [Vintage-Audio] Tube amps with no load
> Date: Sunday, March 02, 2003 8:09 PM
>
> Can you explain what good it does to bring it up slowly
> when you have a tube rectifier?  I can understand it if
> the rectification is solid state so you are truly bringing
> it up slowly... reforming the power supply capacitors.
> It would seem that the way to reform them would be to
> use a variable DC supply to do the reforming.
> Looking for the pros and cons of each.
> Bob McKee
>
>
> ----- Original Message -----
> From: "Duane Fischer, W8DBF" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, March 02, 2003 5:05 PM
> Subject: Re: [Vintage-Audio] Tube amps with no load
>
>
> > The real issue, may be in powering up an old amplifier
that
> has sat idle for
> > several or more years. Unless it is brought up slowly on a
> Variac to allow the
> > capacitors to reform, Kapow! "Sold as is, a non-smoker, so
> not sure where that
> > slight smell of smoke is coming from."
> >
> > DBF
> >
> >
> > ----------
> > From: [email protected]
> > To: [email protected]
> > Subject: Re: [Vintage-Audio] Tube amps with no load
> > Date: Sunday, March 02, 2003 11:55 AM
> >
> > No problem at all....
> >
> > It's only when there's an audio signal going through the
amp
> that there's
> > a problem....
> >
> > Don't forget a transformer is an AC device.  The load is
> only reflected
> > back to the tube during an AC excursion.  There's no
problem
> or
> > refelction with no AC, when the amplifier is at idle.
> >
> > Ed K1ZOK
> >
> > On Sun, 2 Mar 2003 10:28:03 -0600 "Steven K. Wenger"
> <[email protected]>
> > writes:
> > > Is it just me, or does anyone else cringe when someone
on
> eBay writes
> > > the amp's tubes light up but I have no way of testing
it?
> There is a
> > > Fisher X200 amp on eBay right now. You can actually see
> the amp's
> > > line cord plugged into an extension cord, the tube's
> filaments are
> > > on, and no speakers are connected.
> > >
> > >
> >
> >
>
______________________________________________________________
> __
> > Sign Up for Juno Platinum Internet Access Today
> > Only $9.95 per month!
> > Visit www.juno.com
> > _______________________________________________
> > Home:
http://mailman.qth.net/mailman/listinfo/vintage-audio
> > List Administrator: Duane Fischer, W8DBF
> > ** For Assistance: [email protected] **
> > _______________________________________________
> > Home:
http://mailman.qth.net/mailman/listinfo/vintage-audio
> > List Administrator: Duane Fischer, W8DBF
> > ** For Assistance: [email protected] **
>
> _______________________________________________
> Home: http://mailman.qth.net/mailman/listinfo/vintage-audio
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: [email protected] **
> _______________________________________________
> Home: http://mailman.qth.net/mailman/listinfo/vintage-audio
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: [email protected] **

_______________________________________________
Home: http://mailman.qth.net/mailman/listinfo/vintage-audio
List Administrator: Duane Fischer, W8DBF
** For Assistance: [email protected] ** 