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04-27-2008, 09:48 PM
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Head-Fi'er
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Join Date: Feb 2002
Location: Dallas, Texas
Posts: 82
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Quote:
Originally Posted by holland
Hmm, that's a switcher. They do have a linear @ 0.5 for $11.00, but it's not regulated (if it matters at all).
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I'll buy one of the linear unregulated ones and try it out. If it doesn't have too much ripple it might be better than the Cisco power supply, which hiccups a few times starting up.
Quote:
Originally Posted by holland
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The Cisco supply is a regulated switcher.
Pete
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04-30-2008, 11:43 PM
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500+ Head-Fi'er
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Join Date: May 2007
Location: USA
Posts: 838
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Ill probably consider this or a mini3 (high or low depends on headphones) over the summer as a amp build once i get headphones, depends if my headphones have better synergy with SS or Tube
__________________
Portable:128/160/320 VBR MP3 (depends when I encoded it) ->2nd gen Ipod shuffle-> JVC Marshmallows
Home:128/160/320K MP3 -> iTunes -> Onboard Sound Macbook Pro -> JVC HA-RX700
Planning on ripping all in FLAC for storage, V0 MP3 for computer and maybe 192 or 256 mp3 for portable (size permitting V0)
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05-01-2008, 01:08 PM
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Headphoneus Supremus
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Join Date: Jan 2006
Location: Northwest Indiana (metro Chicago)
Posts: 1,870
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Quote:
Originally Posted by holland
Hmm, that's a switcher. They do have a linear @ 0.5 for $11.00, but it's not regulated (if it matters at all).
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I posted that one from Jameco as the Cisco is also a switcher, and the Jameco would likely have enough oomph to drive that potental balanced variant (I think?)
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05-01-2008, 01:23 PM
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Headphoneus Supremus
Moderator
Resistorous Conflagorous
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Join Date: Nov 2004
Location: Seacoast, NH
Posts: 7,315
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Come on, if you're going to do a balanced version you have to at least consider a tube rectified PS.  
__________________
SB3/Arcam CD73 -> Hertsens Signature DAC -> Project Menace -> Woody HF-1 or HF-2
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05-01-2008, 04:22 PM
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Head-Fi'er
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Join Date: Feb 2002
Location: Dallas, Texas
Posts: 82
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Quote:
Originally Posted by n_maher
Come on, if you're going to do a balanced version you have to at least consider a tube rectified PS. |
Tungars are nice for low voltages. You just have to replace them every 1000 hours or so.
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05-01-2008, 08:37 PM
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1000+ Head-Fi'er
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Join Date: Dec 2003
Location: Seattle
Posts: 1,321
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Quote:
Originally Posted by pmillett
I'll buy one of the linear unregulated ones and try it out. If it doesn't have too much ripple it might be better than the Cisco power supply, which hiccups a few times starting up.
Pete
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Quote:
Originally Posted by sejarzo
I posted that one from Jameco as the Cisco is also a switcher
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I've had good luck with Jameco-branded transfomers. Pretty tough little monsters, they are.
So would the Jameco switcher be a good replacement? Pete, did you get a chance to check one out?
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05-01-2008, 11:56 PM
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Headphoneus Supremus
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Join Date: May 2007
Location: Home of the 58mm stainless knob!
Posts: 2,783
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Quote:
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Tungars are nice for low voltages. You just have to replace them every 1000 hours or so.
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I use those to light my driveway. 
__________________
*************************************************
"The only difference between me and a madman is that I am not mad."
- Salvador Dali
"We all agree that your theory is crazy, but is it crazy enough?"
- Niels Bohr
TEAM MILLETT MAX - TEAM BIJOU
TEAM HEADROOM - TEAM β22
TEAM JAN MEIER
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05-02-2008, 12:21 AM
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Headphoneus Supremus
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Join Date: Jun 2007
Posts: 1,618
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.
Last edited by holland; 10-19-2008 at 03:19 AM.
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05-02-2008, 04:24 AM
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Headphoneus Supremus
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Join Date: Sep 2006
Location: Califon, NJ
Posts: 1,924
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Ok I am not really sure about what I am reading here - can I make the amp as I with out worrying about busting my headphones if I turn it off by accident with them plugged in?
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05-02-2008, 03:42 PM
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Head-Fi'er
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Join Date: Feb 2002
Location: Dallas, Texas
Posts: 82
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Quote:
Originally Posted by malldian
Ok I am not really sure about what I am reading here - can I make the amp as I with out worrying about busting my headphones if I turn it off by accident with them plugged in?
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This amp is no different than any other amp with an output cap (like the original Millett hybrid design, or any number of others).
Has anybody blown up their headphones with a Millett hybrid (sans delay circuit)? Build errors don't count
Yes, it makes a thump when you turn it on or off.
I have yet to fry any headphones this way, but I can't gurantee there aren't some particulary sensitive headphones that wouldn't like it.
By the way, on first look the simple delay circuit used on the Millett Max should work fine here. As-is, the first transistor (QM1) might get warm enough to ned a heatsink. You could also change the zener (DM1) to 24V and use a 24V relay to lower the heat.
Pete
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05-02-2008, 04:23 PM
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Headphoneus Supremus
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Join Date: Sep 2006
Location: Califon, NJ
Posts: 1,924
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Alright thanks a lot.
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05-02-2008, 06:11 PM
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100+ Head-Fi'er
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Join Date: Nov 2005
Location: Sioux Falls, SD
Posts: 233
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Antique Electronic Supply is all out of the 19J6 tubes, and I just bought the last 4 from tubedepot.com for 3.95 a peice.
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05-02-2008, 07:34 PM
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Headphoneus Supremus
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Join Date: Sep 2006
Location: Califon, NJ
Posts: 1,924
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Whats the shipping time from Antique Electronic Supply?
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05-02-2008, 07:44 PM
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100+ Head-Fi'er
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Join Date: Nov 2005
Location: Sioux Falls, SD
Posts: 233
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Vacuumtubes.net is half the price of tubedepot.com. oh well.
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