fwh1599

稳压电源不是并联式(SHUNT TYPE)而是串联式(series type)，是以BJT作误差放大，IRF610和IRF9610做调整管的形式。

太贵了,不如多等三天? So costly. Can you wait 3days?

不错哦，第一次秒那么漂亮！

I will accomplish Case Test No.4(PCB Ver.Test 3) in next week. It include 4 betterment: 1.DC coupling(It is most important improve for sound of Twinkle); 2.Strengthen supply after regulator; 3.Increase protect circuit without realy(Sensitive and not hurt timbre); 4.Increase user-friend iindicatory circuit(Light at natural,flash at problem) I wish it is finally PCB for Twinkle,It have high quality sound and security.

hacknet: I get low offset at output stage,I hear Twinkle about a month. I think mabey these are important for get low offset: 1.Select lower offset OP; 2.Select higher PSRR OP; 3.Very symmetrical +-supply; 4.Matched component(Transistors,Diodes,Resistance).

It's rubber cannulation(heat shrinkd),around Q1-Q2,for holding same temperature.

hacknet: I think use a discrete output stage can increase the Amp's drive capacity,and the AMP is a loop feedback,if select low offset and JFET input OP,you can obtain very low offset. In my twinkle(My Twinkle),I use AD8065,the offset is less than 1mV,if use NE5534 the offset is about 10mv. jasonhanjk: I think A1015/C1815 isn't fit output stage,it's a TO-92,Pc<=400mW,current <10mA(+-24V supply,no heat sink),along with the use of D7-D9 and emitter-stabilization resistors R8-R9,so R8=R9>100Ohm.In my Case,I use MJ15030/15031 at 60mA(emitter-stabilization resistors =10ohm),I can get low distortion,Class A sounds!

I think use DB as output stage is very simple and good,we can use BUF IC or discrete DB. As it:

My Twinkle(OP+DB): Case Test No.1 It used MUSE BP 10uF/25V as coupling and feedback Case Test No.2 It used WIMA 1uF/50V as coupling and feedback(R8=10K,R7=68K) Case Test No.3(PCB Ver.Test 2) It used WIMA MKS-3 1uF/63V as feedback,and DC coupling(R8=10K,R7=68K)

So Beautiful.