Sakura AV-735

[1022jv]

Sir Tony diba match pair yung 2SA1302 at 2SC2381 from Toshiba?

[edtechph]

2sc3281 yata yan sir and 2sa1302

[tony]

Sir Tony diba match pair yung 2SA1302 at 2SC2381 from Toshiba?

match in terms of hFE?.......the 2SA1302 and 2SC2381 are called complimentary pairs, because one is a pnp and the other an npn....

[01110011]

^ walking datasheet

[mund24]

yung toshiba sir na a1302 parehas ba ng mjl4302?

hindi lower ang Vce nya even wattage and fT

AFAIK yan yung mga una, jan binase yung mga MJL(ON SEMI) from toshiba
upgraded/newer version sya
2SA1302/2SC3281 -> MJL4302/MJL4281

[1022jv]

Sir Tony diba match pair yung 2SA1302 at 2SC2381 from Toshiba?

Mali pala 2sc3281

[1022jv]

Tama ba Sir. Tony.  Yung 2SC3281 at 2SA1302 ay commonly used noong una just like 2SC5200 at 2SA1943 of today.

[tony]

Tama ba Sir. Tony.  Yung 2SC3281 at 2SA1302 ay commonly used noong una just like 2SC5200 at 2SA1943 of today.

yung Yung 2SC3281 at 2SA1302 ang kuya at ate ng 2SC5200 at 2SA1943....

meron ding MJL3281 at MJL1302 ang ON semi....

[jlester87]

pwede ba sir palitan ko ng 2k trimmer yung 680r para maadjust yung bias? Instead of making a p68 class B amp, gusto ko sanang babaan yung bias for my subwoofer para mas energy efficient, thanks

[tony]

pwede ba sir palitan ko ng 2k trimmer yung 680r para maadjust yung bias? Instead of making a p68 class B amp, gusto ko sanang babaan yung bias for my subwoofer para mas energy efficient, thanks

lowering bias means going deeper into classB......you may not hear a difference since lower frequency ang involved..i think not a bad thing to do...

[pEN DoTA]

ok lang yan palitan, yung sa akin nilaruan ko yung resistor na yun from 680 to 3.3k.

[jlester87]

I am using TIP41C and TIP42C for the driver transistor with 53VDC unloaded rails, safe po ba ito for continuous use kasi bumababa naman ang rails pag loaded?

Baka bigla nalang kasi masira... Thanks

[Disabled]

^ safe pa.

[jlester87]

ok lang yan palitan, yung sa akin nilaruan ko yung resistor na yun from 680 to 3.3k.

Ano sir preferred bias mo for sound quality? No noticeable difference ba sa bass with diff bias setting? thanks

[pEN DoTA]

Ano sir preferred bias mo for sound quality? No noticeable difference ba sa bass with diff bias setting? thanks

pm sent.

[jyjc]

pa sub

[jyjc]

any schematic for 737 power supply pls.

ito sis baka makatulong

ano po purpose nung C3-C4 and R1-R2, kadalasan kasi wala ito sa mga nabubuksan ko na AMP na DIY.

[TechG]

Question po:

para saan yung
-Speaker Protect
-Signal
-Clip
-buffer
-SoftStart

what is the purpose and how this circuit works sa AMP?

TIA

[mund24]

ano po purpose nung C3-C4 and R1-R2, kadalasan kasi wala ito sa mga nabubuksan ko na AMP na DIY.

C3 and C4= to prevent any high frequency feedback/oscillation

R1 and R2= are bleeder, to discharge the storage (capacitors) for safer instances , example if naka OFF na yung PSU, the bleeder (resistor)  discharge it, kalimitan kasi pag alam nating naka OFF na eh wala nang power, so without the bleeder may instances na if nagkashort/ mali yung kinalikot possible masira yung components(IC, transistor and etc.) kasi may naka store pang energy in capacitor

[jyjc]

thanks sis +1
what type of capacitor yung C3 and C4?