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Millett "Starving Student" hybrid amp - Page 7

post #91 of 6522
4/27/08 at 5:48pm
Thread Starter 
Quote:
Originally Posted by holland View Post
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).
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 View Post
True. Keep in mind, if the total goes over $17 or $18 (including shipping), it's probably cheaper to get the Jameco linear.

Jameco Electronics Power Supplies & Wall Adapters: JAMECO RELIAPRO: MW48-4800500
Jameco Electronics Power Supplies & Wall Adapters: JAMECO RELIAPRO: MW48-4800500-R

Is the Cisco one regulated? If it is, then it's a total bargain.
The Cisco supply is a regulated switcher.

Pete
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post #92 of 6522
4/30/08 at 7:43pm
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
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post #93 of 6522
5/1/08 at 9:08am
Quote:
Originally Posted by holland View Post
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).
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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post #94 of 6522
5/1/08 at 9:23am
Come on, if you're going to do a balanced version you have to at least consider a tube rectified PS.
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post #95 of 6522
5/1/08 at 12:22pm
Thread Starter 
Quote:
Originally Posted by n_maher View Post
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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post #96 of 6522
5/1/08 at 4:37pm
Quote:
Originally Posted by pmillett View Post
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
Quote:
Originally Posted by sejarzo View Post
I posted that one from Jameco as the Cisco is also a switcher
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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post #97 of 6522
5/1/08 at 7:56pm
Quote:
Tungars are nice for low voltages. You just have to replace them every 1000 hours or so.
I use those to light my driveway.
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post #98 of 6522
5/1/08 at 8:21pm
.
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post #99 of 6522
5/2/08 at 12:24am
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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post #100 of 6522
5/2/08 at 11:42am
Thread Starter 
Quote:
Originally Posted by malldian View Post
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?
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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post #101 of 6522
5/2/08 at 12:23pm
Alright thanks a lot.
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post #102 of 6522
5/2/08 at 2:11pm
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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post #103 of 6522
5/2/08 at 3:34pm
Whats the shipping time from Antique Electronic Supply?
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post #104 of 6522
5/2/08 at 3:37pm
Try Dale and Roy Rogalski at Radio Electric Supply - otherwise known as vacuumtubes.net:

Vacuum Tubes Radio Tubes - 5,000 different tubes in stock - Over 10 million tubes!
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post #105 of 6522
5/2/08 at 3:44pm
Vacuumtubes.net is half the price of tubedepot.com. oh well.
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