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D&A transformer

intercepter

Member
Dec 18, 2009
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i have a old D&A Maverick 4 driving 4,just wondering what voltage is on the transformers.how close are they to what i need to build a amp with 811a tubes in it.the D&A isn't working to test the voltage.thanks
 
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i have a old D&A Maverick 4 driving 4,just wondering what voltage is on the transformers.how close are they to what i need to build a amp with 811a tubes in it.the D&A isn't working to test the voltage.thanks

The D&A used 660 volt AC transformers. If you used a voltage doubler it would provide about 1800 volts DC under no load. That's in the ballpark for an 811A. You'll probably need more then one transformer if you use more then 2 tubes because of current limitations.
 
i have 2 transformers out of the D&A,was thinking about using 4 811a tubes.this should make a good little amp.don't know if i can use anymore of the parts from the D&A.thanks
 
2 D&A transformers will run 4 811's just fine! I hammered my 811 box on D&A's for a long time, I finally toasted a transformer when I installed some 572b's :oops:
 
can i use any other parts out of the D&A,i also need a case,the case i have is to small for the 811a's.any places to order large cases.thanks
 
can i use any other parts out of the D&A,i also need a case,the case i have is to small for the 811a's.any places to order large cases.thanks

I dont know much about the D&A's, you might be able to use the variable air gap caps?
 
The load cap might be OK but the tune cap will probably arc.

Put the 811s in there sideways like a 30L-1 Collins. They work just fine like that.
 
i have another case its bigger but i will have to lay the 811'S on the side.ill look for another tune cap.thanks.

811 work better vertical, if your going to run it hard! They plates like to sag and short out!

If your going to run it in specs then you will be fine!
 

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