12 volt power supply for tube amps

caraudionut · 24th October 2001, 04:13 AM

I was wondering if any one out there would have or know were to find a 12 volt power supply for maybe a SE 300b ?
I have built a pair of 300b mono blocks for home and I would really like to try to make some for the car.

Any help would be great.
Brian

w5jag · 26th April 2007, 02:48 PM

Consider an old solid state 12 volt power supply designed for some of the older tube ham radio transceivers. Virtually no one runs these radios mobile any more, so a supply should be dirt cheap. Sometimes these even show up as NOS for about dirt cheap.

Drake DC-3, DC-4, Collins MP-1; there are likely many others out there.

Use it as-is, or gut it for the parts. If I were to build a mobile tube amp, this would be my starting point for power.

Win W5JAG

zzzz_alexander · 27th April 2007, 12:27 AM

this is my 300b car amplifier
out put is 8 Watt + 8 watt

power supply is 12 volt to 110 volt 60 or 50 Hz

zzzz_alexander · 27th April 2007, 12:34 AM

this is one of the power supply
http://i35.photobucket.com/albums/d1...CIMG4604_1.jpg http://i35.photobucket.com/albums/d193/zzzzaudio/CIMG4604_1.jpg [IMG]

[/IMG]

agent.5 · 27th April 2007, 12:42 AM

If you use output transformers and accept a hybrid approach, you don't even need a power supply. Just run the amp at 12VDC. There are plenty of tubes that can run on 12VDC and use them as voltage gain. Use mosfet followers for current gain.

Look up Susan Parker's thread on the solid state forum.

w5jag · 27th April 2007, 01:02 AM

Quote:

power supply is 12 volt to 110 volt 60 or 50 Hz [/B]

Neat. Did you pull the inverter board from an old UPS?

Win W5JAG

zzzz_alexander · 27th April 2007, 11:03 AM

yes, this is ups
for computer

Merlinb · 27th April 2007, 12:38 PM

This could form the basis of a VERY cheap and dirty 12Vdc step up PSU:
http://web.telia.com/~u85920178/use/tubepsu.htm

Brian Beck · 27th April 2007, 01:37 PM

Why not just buy a regular DC-to-AC power inverter? These things are dirt cheap these days. That way you just plug a home amp into the AC power. The output is typically a distorted, noisy waveform, so you'd want to make sure you've got line filtering in between it and the amp, but you'd have to do this for any switching option anyway.

Cheap power inverters

The idea of 300B filaments jangling along with road bumps and vibration gives me the willies, but I guess you could vibration-isolate the chassis as much as possible.

w5jag · 27th April 2007, 03:04 PM

Quote:

Originally posted by Merlinb
This could form the basis of a VERY cheap and dirty 12Vdc step up PSU:
http://web.telia.com/~u85920178/use/tubepsu.htm

All of the old mobile supplies are pretty much the same as this in principle.

Win W5JAG

27th April 2007, 12:34 AM	#4
zzzz_alexander diyAudio Member Join Date: Jul 2006	this is one of the power supply http://i35.photobucket.com/albums/d1...CIMG4604_1.jpg http://i35.photobucket.com/albums/d193/zzzzaudio/CIMG4604_1.jpg [IMG][/IMG]

27th April 2007, 01:37 PM	#9
Brian Beck diyAudio Member Join Date: Dec 2004 Location: South Florida, USA	Why not just buy a regular DC-to-AC power inverter? These things are dirt cheap these days. That way you just plug a home amp into the AC power. The output is typically a distorted, noisy waveform, so you'd want to make sure you've got line filtering in between it and the amp, but you'd have to do this for any switching option anyway. Cheap power inverters The idea of 300B filaments jangling along with road bumps and vibration gives me the willies, but I guess you could vibration-isolate the chassis as much as possible. __________________ Brian

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
how to build a 12 volt dc power supply?	michelevit	Class D	5	22nd December 2006 07:53 AM
How to use a 220 Volt power supply at 12 Volts in the car?	Mr. Old School	Car Audio	3	10th March 2006 12:11 AM
Voltmeter to monitor an Electrostatic speaker 10000 Volt power supply	kermeeng	Planars & Exotics	19	17th April 2004 02:23 AM
Can you adapt a computer power supply for the 5v and 6.3 volt needs?	Original Burnedfingers	Tubes / Valves	10	27th November 2002 11:22 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

24th October 2001, 04:13 AM	#1
caraudionut diyAudio Member Join Date: Oct 2001	I was wondering if any one out there would have or know were to find a 12 volt power supply for maybe a SE 300b ? I have built a pair of 300b mono blocks for home and I would really like to try to make some for the car. Any help would be great. Brian

26th April 2007, 02:48 PM	#2
w5jag diyAudio Member Join Date: Feb 2007 Location: Arkansas	Consider an old solid state 12 volt power supply designed for some of the older tube ham radio transceivers. Virtually no one runs these radios mobile any more, so a supply should be dirt cheap. Sometimes these even show up as NOS for about dirt cheap. Drake DC-3, DC-4, Collins MP-1; there are likely many others out there. Use it as-is, or gut it for the parts. If I were to build a mobile tube amp, this would be my starting point for power. Win W5JAG

27th April 2007, 12:42 AM	#5
agent.5 diyAudio Member Join Date: Aug 2003 Location: San Francisco, CA	If you use output transformers and accept a hybrid approach, you don't even need a power supply. Just run the amp at 12VDC. There are plenty of tubes that can run on 12VDC and use them as voltage gain. Use mosfet followers for current gain. Look up Susan Parker's thread on the solid state forum.

27th April 2007, 11:03 AM	#7
zzzz_alexander diyAudio Member Join Date: Jul 2006	yes, this is ups for computer

27th April 2007, 12:38 PM	#8
Merlinb diyAudio Member Join Date: May 2006 Location: York	This could form the basis of a VERY cheap and dirty 12Vdc step up PSU: http://web.telia.com/~u85920178/use/tubepsu.htm

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)