DIY Amp club, Post your DIY amp here
|
|
 Apr 27 2007, 11:38 AM
Return to original view | Post
#41
|
 
Senior Member
6,489 posts Joined: Mar 2005 From: Serdang 
|
=P
no the big big one is ELNA. i have some panasonic though. =) before start up somethings bigger. today i built one of Cmoy with my remaining OPA2134 again. =) just to brushing up my soldering skill. hand a bit keras liao. =P  the bass. is so fat anyway compare to OPA637 sigh.. i kena poison of the fast speed of OPA637 liao.. =( OPA 637 even plug to AC97 also quite ok on KSC75.. =P |
|
|
|
|
|
Apr 27 2007, 12:40 PM
Return to original view | Post
#42
|
|
Senior Member
6,489 posts Joined: Mar 2005 From: Serdang
|
i need somethings very small for my portable earphone / KSC75
haha so i built cmoy loh. nothings can goes as small as it mah.. thats my limit already at the moment. haha so the new amp will be home use.. as it gonna be huge.. =P |
|
|
Apr 27 2007, 12:49 PM
Return to original view | Post
#43
|
|
Senior Member
6,489 posts Joined: Mar 2005 From: Serdang
|
QUOTE(Eokboy @ Apr 27 2007, 12:45 PM) Smaller? Go SMD lah. PPAS is smaller than your Cmoy. lol don't have the SMD soldering station leh. =P better hold my horse.. =P wait i got money first. |
|
|
Apr 27 2007, 06:21 PM
Return to original view | Post
#44
|
|
Senior Member
6,489 posts Joined: Mar 2005 From: Serdang
|
QUOTE(BraThief @ Apr 27 2007, 06:10 PM) pcWork, @eokboy . Roger that. thanks for info. will goes into SMC once my new amp is done. =Phow does this opa2134 sound ? how much would an opa2134 cost in jalan pasar ? Thanks. p.s: am i allowed to ask that here ?  @BraThief  u steal bra?haha sorry.. ok opa2134 i got from BSL555 long long time ago roughly RM 10-12 u can't find it in jalan pasar. perhaps farnel will have. it sound ah it's much warmer compare to LDM+ if u use it in cmoy. sound stage not bad. bass heavy. but slow bass. not as fast and accurate as 637 =P overall very good loh the sound match with KSC75 ka... IEM ok ok loh. =) and it's easier to control with lower voltage. |
|
|
Apr 27 2007, 07:13 PM
Return to original view | Post
#45
|
|
Senior Member
6,489 posts Joined: Mar 2005 From: Serdang
|
QUOTE(zahri @ Apr 27 2007, 06:26 PM) erm... opa637 bass's response is much faster than opa2134 ? Lets just say, im using the tangentsoft schematics, and can i use this opa637 ? Sorry for the noob question.  QUOTE(lAh0S @ Apr 27 2007, 06:52 PM) You can't. actually canOPA637 is single channel while OPA2134 is dual channel. the schematic shown for cmoy is actually singel channel so we combine left and right (we double everythings) to make it dual channel. for cmoy yes u can use it but 637 is harder to control, it need much "clean" power supply. and it's much more expensive opa2134 = RM 12 opa 637 = RM 50 best price. u need two so the op amp alone will be RM 100. =) other parts add in. can easily reach RM 150-> RM 200. with that budget i rather go for other schematic then. =P |
|
|
Apr 27 2007, 09:07 PM
Return to original view | Post
#46
|
|
Senior Member
6,489 posts Joined: Mar 2005 From: Serdang
|
QUOTE(rioven @ Apr 27 2007, 09:00 PM) perhaps like opa627/opa637..other alternatif is opa2107 (dual channel)..should be same sound signature (read at head-fi) =PIMHO. same sound signature, but OPA637 is far more better. =P |
|
|
|
|
|
Apr 30 2007, 11:10 AM
Return to original view | Post
#47
|
|
Senior Member
6,489 posts Joined: Mar 2005 From: Serdang
|
HD535 + cmoy??
NOWAY.. =P built.... at least buffered amp. or somethings better. |
|
|
May 1 2007, 11:38 AM
Return to original view | Post
#48
|
|
Senior Member
6,489 posts Joined: Mar 2005 From: Serdang
|
2132
do PM me the price pls haha =) and by the way, where is ur location? |
|
|
May 4 2007, 08:15 PM
Return to original view | Post
#49
|
|
Senior Member
6,489 posts Joined: Mar 2005 From: Serdang
|
QUOTE(bsl555 @ May 4 2007, 12:26 PM) Insist on gold pins?.. I don't think its available at Jln Pasar. They mostly retail the normal variety. Its usable but IMO, the quality is not entirely top notch. Had a few with loose pins...and it came from Nixie. IMHO, I can hardly hear audible difference between non-gold and gold pinned sockets. Best is actually solder the damn chip PERMANENTLY!. QUOTE(zahri @ May 4 2007, 07:55 PM) littleghost, u are answering the question. but i see that he actually answered the question u asked before... i bought the same one u have in the picture. but mine is the normal one, yours looks like its gold , is it ? bsl555, im afraid that i might fry the amp while soldering the legs directly to the board. i might do that once i have enough confidence in not frying it and when i am 100% sure the board is working, who knows i might screw it up  hehehe... Is there any significant difference in the sound produced if i use the gold socket than the normal ic socket ? THANKS to ALL |
|
|
May 4 2007, 08:33 PM
Return to original view | Post
#50
|
|
Senior Member
6,489 posts Joined: Mar 2005 From: Serdang
|
QUOTE(bsl555 @ May 4 2007, 08:31 PM) There's some schools of thought that socketing IC's are bad if its going to be permanent, especially if low noise and interference rejection is paramount and to be achieved. Nevertheless, if one is doing prototyping and for experimentation, by all means use a socket for convenience. Once the circuitry is to one's expectation, all components are to soldered in permanently. so there's a korea soundcard with all the DIP socket is actually bad design? giving more chances of having noise? |
|
|
May 4 2007, 10:04 PM
Return to original view | Post
#51
|
|
Senior Member
6,489 posts Joined: Mar 2005 From: Serdang
|
QUOTE(cutun1217 @ May 4 2007, 09:09 PM) anyone has the CMOY layout in eagle format? i want to etch own PCB, but dont know how to draw in eagle i wanna learn how to etch oh . thanksmind to teach me? |
|
Topic ClosedOptions
|
| Change to: |  0.0441sec
 0.25
 7 queries
 GZIP Disabled
Time is now: 24th December 2025 - 09:43 AM |
Quote