hi
im new to audio...so what i say might be crap (hahha)..but heres my 2 cents worth...the amplifier seems to be a relatively good design except for the quasi complementary output stage...this is rather redundant now considering the hi quality of PNP tansistors...its a straight forward design
im new to audio...so what i say might be crap (hahha)..but heres my 2 cents worth...the amplifier seems to be a relatively good design except for the quasi complementary output stage...this is rather redundant now considering the hi quality of PNP tansistors...its a straight forward design
demons_wing said:
I kind of thought that too, but there are two reasons why I am going quasi-complementary:
1) I like the sound of the h/k 430 power amp section (this little amp I am building will work with my 430 to bi-amp a set of Wharfedale Diamond 7.2 loudspeakers)
2) I have most of the parts I need already, including 4x 2SC1030 power amp transistors, and two 28.5-0-28.5vold CT transformers.
What is really going to be fun (and perhaps stupid as well) is that I am going to build it using all point-to-point wiring, as I do not have the knowledge or ability to etch my own PCB.
i always thought point to point would be prone to RFI??..esp at the high power transistor side?..could be a dumb question..also....have you considered using proto board?
The Baxendall diode gives this quasi design lower distortion than most.
If your trafo is 28.5-0-28.5V AC RMS, the DC voltage will be ±40V, way too high for the devices here.
Look for 18-0-18 at about 80VA per channel or 20-0-20 at 160VA for a stereo supply. Because of poor regulation the smaller 18-0-18 will probably have a higher no-load voltage than the larger 20-0-20, around ±30V.
If your trafo is 28.5-0-28.5V AC RMS, the DC voltage will be ±40V, way too high for the devices here.
Look for 18-0-18 at about 80VA per channel or 20-0-20 at 160VA for a stereo supply. Because of poor regulation the smaller 18-0-18 will probably have a higher no-load voltage than the larger 20-0-20, around ±30V.
funny, I'm using a pair of HK A401 (integrated amp based on the HK330C amp section) to biamp a pair of wharfedale 8.1 with nice results.
Those old HK amps sections are sonically great, even by today's standards. 🙂 If you like the sound, what stops you from making an exact copy ?
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