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Greater Toronto Area DIY meetup
Greater Toronto Area DIY meetup
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Old 6th November 2018, 03:11 AM   #931
ticknpop is offline ticknpop  Canada
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Join Date: May 2005
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Greater Toronto Area DIY meetup
Me too, i ‘m not far from you. And I have to work there every week. , but at least we can play the stereo
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Old 6th November 2018, 03:55 AM   #932
anatech is offline anatech  Canada
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Location: Georgetown, On
Greater Toronto Area DIY meetup
That's so true.

I do have a lab if you need to do something Dave.

-Chris
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Old 6th November 2018, 02:37 PM   #933
BigE is offline BigE  Canada
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Quote:
Originally Posted by ticknpop View Post
The shop is available if anyone needs an assembly area, a big drill press, or metal shear, or if anyone wants a test area or load for something new.
( or just wants to play music and drink beer, wine, tequila, scotch, rum, vodka, Gran Marnier, or any other fermented beverage.)

The room is reflective I know. I must have missed the humungous horns where were they? , my favorite bass horn is 8 feet wide by 42 inches tall and so far I havenít found a pair or had the nerve to install them..................

Well Yes the shop speakers arenít exactly domestic, but for driving them with a single power amp to demonstrate about as efficient a load as there is. I will have a Mac mini with Amarra and Dirac running next meet which does digital domain room and speaker frequency response correction by inverse correction from mic measurements. The Amarra program can choose the tracks and control the volume from an ipad then, so it can be passed around for listeners to pick their preference of demo tracks. A balanced jfet/fet preamp which matches the new dac for topology and construction will be ready soon. The 2 chassis for new 150 watt monoblock class A power amps arrived today so Iíll have to get off my butt..................
Doesn't volume control in the digital domain mean you use less bits?
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Old 6th November 2018, 02:44 PM   #934
bentoronto is offline bentoronto  Canada
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Greater Toronto Area DIY meetup
Quote:
Originally Posted by BigE View Post
Doesn't volume control in the digital domain mean you use less bits?
Sure makes it easier to build. But good question, and one I have asked too. Two answers: there's so much digital S/N headroom, not a problem AND/OR you can do what I did, a 4-pot ganged volume control downstream from the DSP.

The VC approach works quite nicely if all digital sources are same gain level, as they ought to be (excepting some recordings made very low with loud short peaks... but you'd have to ride the gain control on those recordings anyway).

B.
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Old 6th November 2018, 04:02 PM   #935
ticknpop is offline ticknpop  Canada
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Greater Toronto Area DIY meetup
You can chose -as the new preamp uses a 60 step remote controlled reed relay switched balanced attenuator using my favorite naked resistors, so those who find digital attenuation the end of civilization will have the preamp remote control to keep analog alive .

Last edited by ticknpop; 6th November 2018 at 04:07 PM.
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Old 6th November 2018, 06:22 PM   #936
Mikett is offline Mikett  Canada
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Hi Dave, thanks for hosting the meetup.
Hope you are not too tired of the leftovers by now.

Mike
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Old 6th November 2018, 10:05 PM   #937
ticknpop is offline ticknpop  Canada
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I freeze them for the next diy meet.

I’ll ask whose attending in advance so I don’t get too much caviar next time.

Last edited by ticknpop; 6th November 2018 at 10:14 PM.
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Old 6th November 2018, 11:00 PM   #938
Atom666 is offline Atom666  Canada
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Greater Toronto Area DIY meetup
Just wanted to say thanks for hosting, had a good time!
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Old 25th December 2018, 08:48 PM   #939
ticknpop is offline ticknpop  Canada
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I’m building plug in adaptar cables for spade, locking banana, and flexible bare wire connections for the speaker wires to hookup to the shop speakers to handle whatever amp connections are required much more easily that the stiff bare wire thats there now.

An all jfet direct coupled cascode single ended preamp with Jung super regulators next time.

Dirac speaker correction from a Mac Mini runiing Amarra.

Working on the all discrete balanced jfet/fet preamp with shunt regulators that matches the 24/194khz - 8 x 1704K dac that was at the last meet. If the preamp is ready I’ll bring both the preamp and the dac, they are identical in build.

It would help me if I know how many are comining to cater the event so i’ll ask for an inication of who’s coming a few weeks in advance.

Any suggestions, Feruary ? March ? April? Never?

Last edited by ticknpop; 25th December 2018 at 08:51 PM.
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Old 26th December 2018, 01:09 AM   #940
anatech is offline anatech  Canada
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Greater Toronto Area DIY meetup
Hi Dave,
I think it would be better when snow and storms aren't such a problem. You'll have a better turnout that way.

I will be bringing a tube amp I designed.

-Chris
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