An externally hosted image should be here but it was not working when we last tested it.
Done checking componet and voltage measuring found out 100r resistor change value to 1mr and finally my b500 is working fine now thanks to mr.apex and to other here.
Its sound really good 🙂
Sent from my MyPhone A919 Duo using Tapatalk
Congrats Kabayan... My B500 TEF..in action..once again thank you so much sir apex and sir willy.. very loud and very clear sound..thank you...
Attachments
Done checking componet and voltage measuring found out 100r resistor change value to 1mr and finally my b500 is working fine now thanks to mr.apex and to other here.
Its sound really good 🙂
Wow at those caps
Hello mister Miles I want to know who was the first layout designer for B500?
best regards
Juan
best regards
Juan
Congrats Kabayan... My B500 TEF..in action..once again thank you so much sir apex and sir willy.. very loud and very clear sound..thank you...
Somebody wants to build your own transformer? here's the link..http://sklaic.info/electronic/transformer you can download the file..regards to all advance merry x mas to all....
An externally hosted image should be here but it was not working when we last tested it.
plan for b500 tef what post can i find schematic and pcb here?Sent from my MyPhone A919 Duo using Tapatalk
Nice Heatsink.... 😉
Where did you bougth those in Manila?
Its from arangque but dont know were exaclty sir,my friend bought it for me wkrking near the shop sir do u have the schematic of b500 tef with protect
Sent from my MyPhone A919 Duo using Tapatalk
No.. I don't have full schematic, Just upgraded B500 tef pcb w/out protect.
Ok thanks sir
Sent from my MyPhone A919 Duo using Tapatalk
Sir why my pbc holes not fit with transistor pins i use your pcb i just print your design is there exact size?Layout H 900 TEF and B 500 TEF
Sent from my MyPhone A919 Duo using Tapatalk
Sir why my pbc holes not fit with transistor pins i use your pcb i just print your design is there exact size?
Sent from my MyPhone A919 Duo using Tapatalk

Sent from my MyPhone A919 Duo using Tapatalk
desert storm i cant pm you.. your inbox are full.. this is my e mail sandman_15th😀Congrats Kabayan... My B500 TEF..in action..once again thank you so much sir apex and sir willy.. very loud and very clear sound..thank you...
I use software sprint lay out 5, please check your print!!
and I don't problem to use transistor C5200
and I don't problem to use transistor C5200
Last edited:
I use software sprint lay out 5, please check your print!!
and I don't problem to use transistor C5200
Ok i will check again can u send schematic and partlist to me? Thanks sir
Sent from my MyPhone A919 Duo using Tapatalk
I wanted to ask Mr.Mile or the other could answer, even fellow DIYer may experience the same thing with this problem, .. why the H900 standard when playing a kick drum, bass disappears (PA as SUB) ... the 4R or 8R load. but if for a bass guitar no problem, voltage regulator 45ac-90ac-ct ... 4kva. and I do not use nsl 32. where is that must be repaired or is there any other damage?
sorry my bad english
thanks and regards
I have the similar problem not sure if this the same problem, my B500 when playing bass drum the speaker move backward but if playing regular song mid n treble no problem at all speaker move to front, any idea to fix this issue? i Hope any diy member could help
Regard
Mr.Apex and and to others here who can help this is my protect circuit having problem,when i first turn it on the relay wont activate but when i turn it off and on again 24v now present on relay coil and turns on i measure voltage on regulator 7815 +15 v present„7915 -15v absent having lower voltage and 7912 +12 present,then i 2xcheck my components and found 4148 diode in reverse position so i correct it and placed it on copper side due to track damage on copper but still same trouble,and while im trouble shoot i accedentaly forgot to connect the bd241 and turn it on after 5sec relay on with 24vdc and +-15vdc is present what could be the problem i need help with this my new 2 b500 is waiting any help pls.
Sent from my MyPhone A919 Duo using Tapatalk

Sent from my MyPhone A919 Duo using Tapatalk
I have the similar problem not sure if this the same problem, my B500 when playing bass drum the speaker move backward but if playing regular song mid n treble no problem at all speaker move to front, any idea to fix this issue? i Hope any diy member could help
Regard
H900 and B500 have inverted output phase for useing with B2181 and B181 subs. Speakers in B2181 and B181 are in reverted position for beter cooling.
If you use B2181 and B181 with another amps you must reverted (+) and (-) on speaker terminal or you can turn around speaker in standard position, also if you use H900 and B500 with another speakers you must reverted (+) and (-) on speakers terminals or amps output terminals.
Regards
Apex said this on h900 forum maybe it will you this
Sent from my MyPhone A919 Duo using Tapatalk
- Home
- Amplifiers
- Solid State
- 500W PA amplifier with Limiter