I finally finished assembling that kit. Now I need a power supply for it. I posted the same thread on 2 different forums but none of the answers are the same. What do you guys suggest?
HIFI AMP KIT valve 6N11 + LM4780（2*60W） on eBay.ca (item 180449856016 end time 27-Jan-10 02:28:55 EST)
Here's the schematics
View attachment LM478.pdf
HIFI AMP KIT valve 6N11 + LM4780（2*60W） on eBay.ca (item 180449856016 end time 27-Jan-10 02:28:55 EST)
Here's the schematics
View attachment LM478.pdf
You require 3 supplies.....
0-24, 0-24 to supply the chipamp @ 150VA (the main power)
0-18, 0-18 to supply the HT to the valve/tube @ 100ma to 500mA
0-9 to supply the valve/tube heater @ 500mA
The 0-24, 0-24 could be a centre tapped transformer ie 24-0-24 but the 0-18, 0-18 must be 2 seperate windings as they piggyback on top of the 24v windings ( to give effectively 42-0-42 )
Hope this helps
Andy
.
Looking at the
0-24, 0-24 to supply the chipamp @ 150VA (the main power)
0-18, 0-18 to supply the HT to the valve/tube @ 100ma to 500mA
0-9 to supply the valve/tube heater @ 500mA
The 0-24, 0-24 could be a centre tapped transformer ie 24-0-24 but the 0-18, 0-18 must be 2 seperate windings as they piggyback on top of the 24v windings ( to give effectively 42-0-42 )
Hope this helps
Andy
.
Looking at the
Here's what I got from another forum
One with 120v primary, 48v center tapped secondary, or two 24v secondary windings, at least 150vA rating.
One with 120v primary, 36v center tapped secondary, or two 18v secondaries. 5vA would likely be enough.
One with 120v primary, 9v secondary, 3vA or more.
One with 120v primary, 48v center tapped secondary, or two 24v secondary windings, at least 150vA rating.
One with 120v primary, 36v center tapped secondary, or two 18v secondaries. 5vA would likely be enough.
One with 120v primary, 9v secondary, 3vA or more.
In addition to the noted power supplies, you will need SIX heatsinks.
Note the four TO220 devices all bunched together...you should have sinks on all four to get full ratings from them. As the are all tightly bunched together consult the technical diagrams for suitable dimensions & clearances for you amp.
As there are zillions of heatsinks available you should be able to find four to fit just right. There is another TO220 device all alone on the board...you could use the same sink as you will be getting for the other four.
Then there is the ampchip itself & that will require a rather large heatsink to cool it down...check out the various heatsinks available & you should find something doable.
______________________________________________________Rick...
Note the four TO220 devices all bunched together...you should have sinks on all four to get full ratings from them. As the are all tightly bunched together consult the technical diagrams for suitable dimensions & clearances for you amp.
As there are zillions of heatsinks available you should be able to find four to fit just right. There is another TO220 device all alone on the board...you could use the same sink as you will be getting for the other four.
Then there is the ampchip itself & that will require a rather large heatsink to cool it down...check out the various heatsinks available & you should find something doable.
______________________________________________________Rick...
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The 4 TO220 devices together are the rectifier diodes. I don't think they require any heatsink. (they would if they were regulator chips which is what "Richard Ellis" may be thinking) The other one on its own is the heater regulator and a heatsink is probably a good idea.
As for transformers, what you have in post#5 is WRONG ! You must have 2 18v secondaries not a centre tapped.
( Otherwise OK )
Andy
As for transformers, what you have in post#5 is WRONG ! You must have 2 18v secondaries not a centre tapped.
( Otherwise OK )
Andy
Good that I didn't buy anything!! I went to an e-store this afternoon that store carries everything but he needed part numbers from the Hammond catalog, way too many options and choices I totally got lost after I found the first transformer (I think I found it)
Here's the catalog could you guys point me which ones I need for sure?
Hammond Mfg. - Electronic Transformers - POWER Index
Here's the catalog could you guys point me which ones I need for sure?
Hammond Mfg. - Electronic Transformers - POWER Index
That's all from the Hammond website? There's no search for parts so I can't pull em from the site!!
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You can order all in one custom toroidal transformer. 200VA would cost about 90-100 USD + about 20-30 USD shipping to Cananda.
see my thread: http://www.diyaudio.com/forums/tube...one-need-custom-power-output-transformer.html
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