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Allied tube power transformer

Started by bitrex December 11, 2014
Several years ago I remember buying an Allied Electric branded
 power transformer similar to this one:

http://www.alliedelec.com/search/productdetail.aspx?SKU=70009000#t
ab=overview

But if I recall correctly the unit I bought was somewhat smaller;
 the primary had no center tap and the filament winding was rated
 for just 300 mA.  It doesn't seem to be on their site anymore. 
 Does anyone make a similar product?

At these power levels I'm wondering if it might be easier and
 cheaper to just use a switcher for B+.

-- 


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http://www.hammondmfg.com/pdf/EDB262A12.pdf

Try Edcor too.

Or if you had an automotive application in mind,

http://seventransistorlabs.com/Images/Discrete_Tube_Supply.png

Tim

-- 
Seven Transistor Labs
Electrical Engineering Consultation
Website: http://seventransistorlabs.com

"bitrex" <bitrex@de.lete.earthlink.net> wrote in message 
news:VKOdnRyLY98mqhfJnZ2dnUU7-d2dnZ2d@earthlink.com...
> > Several years ago I remember buying an Allied Electric branded > power transformer similar to this one: > > http://www.alliedelec.com/search/productdetail.aspx?SKU=70009000#t > ab=overview > > But if I recall correctly the unit I bought was somewhat smaller; > the primary had no center tap and the filament winding was rated > for just 300 mA. It doesn't seem to be on their site anymore. > Does anyone make a similar product? > > At these power levels I'm wondering if it might be easier and > cheaper to just use a switcher for B+. > > -- > > > ----Android NewsGroup Reader---- > http://usenet.sinaapp.com/
"Tim Williams" <tiwill@seventransistorlabs.com> Wrote in message:
> http://www.hammondmfg.com/pdf/EDB262A12.pdf > > Try Edcor too. > > Or if you had an automotive application in mind, > > http://seventransistorlabs.com/Images/Discrete_Tube_Supply.png > > Tim >
Nice use of the "Forrest Mims" oscillator topology! -- ----Android NewsGroup Reader---- http://usenet.sinaapp.com/
"bitrex" <bitrex@de.lete.earthlink.net> wrote in message 
news:PL6dnU5fuMoL_xbJnZ2dnUU7-e2dnZ2d@earthlink.com...
>> http://seventransistorlabs.com/Images/Discrete_Tube_Supply.png >> > > Nice use of the "Forrest Mims" oscillator topology!
Hmm, hadn't thought of that. I pieced that together from scratch, but I suppose some of the feedback bits are reminiscient. It's not really a multivibrator though, more like a monostable with a variably leaky re-trigger. Predecessors used feedback from the output transistor (gate or drain), but as this varies with supply and load voltage, I try to avoid doing that. Still, comparable performance and behavior (current mode control, no feedback winding required) from four transistors wasn't too bad either. Tim -- Seven Transistor Labs Electrical Engineering Consultation Website: http://seventransistorlabs.com