hi Sir Andrew
wow,,, cool sir, maybe I will learn a lot from you, about H & HD class ..
while I was playing in first class AB
regards
wow,,, cool sir, maybe I will learn a lot from you, about H & HD class ..
while I was playing in first class AB
regards
hola amigos del foro muy interesante estos amplificadores apex,pero tengo una pregunta si pueden publicar el pcb con sus componentes de hx11 psu
English only please. RULES
Hello friends of the Forum very interesting these amplifiers apex, but I have a question if they can publish the pcb with its components of hx11 psu
no!i don't have an intention to drive the speaker at its full capacity. and besides the amp is not intended to drive specifically to that speaker. i decided to increase the rail at +-20v, and that would give HV of +-145v and +-155v for VAS. in this case, there's no way the amp can produce as much as speaker specs. this would give around 1300@8ohm at clipping, so its safe.
this amp is for mobile purposes so it needs to be high power.
for mile, what is the current set at vas stage on your vertex amp?..
this amp is for mobile purposes so it needs to be high power.
for mile, what is the current set at vas stage on your vertex amp?..
Greetings i'm putting together the amplifier apexaudio 900 because i will be sending them photos, my question is with the transistor a42 is equal to mpsa42 and a92 shall be equal to mpsa92 thank you.
Greetings, i am with other questions waiting for your prompt help.
could you put 4558 rather than the ne5532 ci?
could you put 4558 rather than the ne5532 ci?
i'd finished cascoding two transistors at vas stage of h900 based on ba2000 and it work fine. setting up vas current at 10ma, the cascode bias resistor between the 2 base of mje340/350 is 180k instead of 220k,this would divide the voltage rails equally to all pairs
now my amp has a vas rail of +-150v separated, MV=80v and HV=140v respectively. i plan to use 3step driver but it seems i have to rewind my transistors and add another set of board. so i decided to add more output transistors and mosfets to compensate more power. the mosfet was 4pairs of irf2807
regards..
now my amp has a vas rail of +-150v separated, MV=80v and HV=140v respectively. i plan to use 3step driver but it seems i have to rewind my transistors and add another set of board. so i decided to add more output transistors and mosfets to compensate more power. the mosfet was 4pairs of irf2807
regards..
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Hi sir andrewlebon
Greetings i will try to h900 transformer for toroidal details in your post no719
How much ampere i get
Thanking you sir
Greetings i will try to h900 transformer for toroidal details in your post no719
How much ampere i get
Thanking you sir
sownel that is true 750va trafo data and if you want make that you will waste your hard work.that only for testing.
nice build sir Bhoy... can you share the PDF of the of your amps using mur1520?
thanks...
thanks sir 1520?? u mean mur1620? i dont have pdf file i just adjust the size in paint then print if you want i have pdf file but version 2 using also mur1620.give me your e mail.
Mr.rohin thanks for ur reply. My badness already build This trafo anyway pls give me 25ampere details
Mail id stanimorin@gmail.com
Hi rohin greetings,
I build one channel h900 and 750va transformer sound very loud and clear. Its produce more heat my rail 100-50 dc offset .3ma .how to buy a power amp case
I build one channel h900 and 750va transformer sound very loud and clear. Its produce more heat my rail 100-50 dc offset .3ma .how to buy a power amp case
hi, for home use you can use any transformer thats not a matter.for case go to iron box maker shop(electric panel builder) and give them dimension they will make.heat can come for several reason if possible post pictures.
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Hi Mile,as this protection board is against the overload, d.c present on out(speakers)
and overheat ,what is the lower d.c v (in speaker out)for protect activation,what is the level on pro input for protect activation?
I want to know these levels for testing this protection board stand alone without connection to an amplifier.
2x18v a.c is from a separate transformer?
Can you post a wiring diagram with an amplifier?
Apex PA protection
Hi Mile ,i beleive that is a wrong polarity diode in this board.
Please have a look at this acording to this schematic.
I have test this and some measurements posted here just in case helping others
Hi Mile ,i beleive that is a wrong polarity diode in this board.
Please have a look at this acording to this schematic.
I have test this and some measurements posted here just in case helping others
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