Power Supply for Altec 459a
« on: February 03, 2021, 11:40:07 AM »
Getting ready to rack up a pair of Altec 459a's...looking for a good power supply kit. I've done plenty of lower voltage rack jobs with solid state pres (Altec 9470s, Spectrasonics 101s, etc.) with the Five Fish 2448 and the JLM supplies, but I'm striking out finding an equivalent for tube gear. Schematic shows a 6.3V/1.6A and 275V/40mA requirement, and obviously I'd like to over-spec on amperage to make sure I have more than enough for both models. Also I'd prefer a kit that comes with a transformer. Any recommendations would be greatly appreciated!
http://www225.pair.com/audio/waltzingbear/Schematics/Altec/Altec_459A.htm
Also, any issues using something like the this Five Fish DC 1248 board on the 6.3V rail to provide 48V for phantom? Any concern with the amperage being too high for phantom?
https://www.fivefishstudios.com/shop/index.php?route=product/product&product_id=88
Thanks!


EmRR

Re: Power Supply for Altec 459a
« Reply #1 on: February 03, 2021, 01:28:06 PM »
International Power linear supplies from Mouser. 

Those ran DC filament in the consoles.  Should be ok with AC too I think. 

I've written elsewhere about the $10 Meanwell switchers for phantom, they work well. 
Best,

Doug Williams
Electromagnetic Radiation Recorders

"I think this can be better. Some kind of control that's intuitive, not complicated like a single knob" - Crusty

"Back when everything sounde

Re: Power Supply for Altec 459a
« Reply #2 on: February 04, 2021, 09:49:44 AM »
International Power linear supplies from Mouser. 

Those ran DC filament in the consoles.  Should be ok with AC too I think. 

I've written elsewhere about the $10 Meanwell switchers for phantom, they work well.

Thanks Doug, but the International ones only go up to 265 and that one only has one output...looking for something that has the specs above.

EmRR

Re: Power Supply for Altec 459a
« Reply #3 on: February 04, 2021, 11:52:43 AM »
Thanks Doug, but the International ones only go up to 265 and that one only has one output...looking for something that has the specs above.

Look again, they are adjustable.    I've used dozens of them.  And.   10V less is no difference.   
Best,

Doug Williams
Electromagnetic Radiation Recorders

"I think this can be better. Some kind of control that's intuitive, not complicated like a single knob" - Crusty

"Back when everything sounde

waltzingbear

Re: Power Supply for Altec 459a
« Reply #4 on: February 22, 2021, 01:57:23 PM »
don't know where you came up with that link, but you should use the standard link, http://waltzingbear.com/Schematics/Altec/Altec_459A.htm

EmRR

Re: Power Supply for Altec 459a
« Reply #5 on: February 23, 2021, 08:37:17 AM »
Thanks Doug, but the International ones only go up to 265 and that one only has one output...looking for something that has the specs above.


Another point:  in the consoles the power transformer tap is to set filament voltage....B+ goes up and down too.  275 is an average value.
Best,

Doug Williams
Electromagnetic Radiation Recorders

"I think this can be better. Some kind of control that's intuitive, not complicated like a single knob" - Crusty

"Back when everything sounde


 

Related Topics

  Subject / Started by Replies Last post
1 Replies
2088 Views
Last post December 24, 2004, 09:32:27 PM
by CJ
0 Replies
1300 Views
Last post January 25, 2010, 03:37:11 PM
by tubologic
2 Replies
1676 Views
Last post July 31, 2011, 10:12:39 AM
by tubologic
0 Replies
578 Views
Last post July 03, 2018, 07:44:53 PM
by JW