Bottlehead Forum

Bottlehead Kits => Legacy Kit Products => Quickie => Topic started by: the dude on January 04, 2012, 08:20:32 AM

Title: Quickie C1 . . ?
Post by: the dude on January 04, 2012, 08:20:32 AM

Iv'e had this since Halloween, its fabulous!
I was playing with OPA's and LM's before these, no more!  HOOKED!
Anyway, the Carver preamp gave me some trouble, again, so I decided to make a small modification...
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi258.photobucket.com%2Falbums%2Fhh251%2Fpaulpatrick3%2FquickieC1.jpg&hash=1be61e82a9877f0aabbbeb53be4b7cd4a6cf1a79)

BEST mod done to this unit, hands-down.

Title: Re: Quickie C1 . . ?
Post by: Grainger49 on January 04, 2012, 08:48:23 AM

LAMO!  Very well put.

Title: Re: Quickie C1 . . ?
Post by: porcupunctis on January 04, 2012, 04:03:19 PM

Dude!  I can't tell you how many times I've considered building a quickie into one of my Phase Linear (pre-carver, carver) pre-amps.  Before I got into Bottlehead stuff I accumulated a bunch of PL SS equipment and kept running into equipment problems.  The biggest problem being that the ICs for the preamps are no longer manufactured and don't have a modern pinout so replacing is not a good option.

I love the looks of this stuff but I just can't get any of them running well for any length of time.  I might have to put this idea back on my project list now.

Thanks for sharing, nice work.

Title: Re: Quickie C1 . . ?
Post by: the dude on January 05, 2012, 07:03:35 AM

Your'e welcome and thanks!
The Joppa board is underneath BTW.
It [Quickie] currently uses the volume balance and power controls.
Next I think I will integrate an electronic crossover I have, it may well get the tube treatment before that.
The Quickie alone [no process] has more stage than the C1 did with all of the holography circuits engaged.
Strangely accurate at the same time... I can't wait to see what BugleBoy tubes do with this thing!

Title: Re: Quickie C1 . . ? can go to wall outlet when batteries die
Post by: the dude on January 10, 2012, 05:09:44 AM

Iv'e used an hp printer power cube and parallel 63v 1000uf fc cap in replacement of the 9v batteries with fair success FWIW.

Title: Re: Quickie C1 . . ?
Post by: the dude on January 10, 2012, 09:02:53 AM

there was some audible noise without the cap.
with the cap its there but not discernible with audio output, only in silence.
I was thinking 2 more in series with + and - wire might be worth trying for giggles...
There is definitely noise though...

Title: Re: Quickie C1 . . ?
Post by: the dude on January 10, 2012, 09:05:13 AM

or maybe :
http://sound.westhost.com/project43.htm

Title: Re: Quickie C1 . . ?
Post by: Doc B. on January 10, 2012, 09:08:16 AM

You might just try a film cap in parallel with the existing 1000uF, maybe a 1uF or a .1uF. Might shunt more HF noise to ground.

Title: Re: Quickie C1 . . ?
Post by: the dude on January 19, 2012, 07:23:21 PM

.1uf cap, check. I also found that a piece of copper tape helped strung from tops of tubes to chassis helped with noise.
Microphonics worse with a DC converter?

Title: Re: Quickie C1 . . ?
Post by: Doc B. on January 20, 2012, 06:21:13 AM

The microphonics might be worse with a DC converter simply because you don't have the additional mass of the batteries attached to the chassis plate.

Title: Re: Quickie C1 . . ?
Post by: the dude on January 20, 2012, 11:38:02 AM

LOL I bet that's what it is!