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Author Topic: DIY Leach Amp 700w 2R  (Read 3115 times)

Offline fantom_mayonaise

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Re: DIY Leach Amp 700w 2R
« Reply #20 on: October 21, 2011, 04:42:47 PM »
Quote from: pENdot on October 21, 2011, 04:10:14 PM
ano ito? hi jacker? ???

this is a very good thread. >:(

I asked sir tony a question then after some thought, deleted it. No hijacking done :)
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Re: DIY Leach Amp 700w 2R
« Reply #20 on: October 21, 2011, 04:42:47 PM »

Offline jbmobile

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Re: DIY Leach Amp 700w 2R
« Reply #21 on: October 29, 2011, 10:44:31 PM »
mga master ng leach amp..i think it's possible to uprate the superleach amp using 2sc5200/2sa1943,,A1941/C5198drivers, A940/C2073 Vas with 75-0-75VAC,1300va trafo..450Wrms@8ohm will be attainable..just my 2 cents.. ::) ;D
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Re: DIY Leach Amp 700w 2R
« Reply #21 on: October 29, 2011, 10:44:31 PM »

Offline tony

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Re: DIY Leach Amp 700w 2R
« Reply #22 on: October 30, 2011, 07:43:54 AM »
Quote from: jbmobile on October 29, 2011, 10:44:31 PM
mga master ng leach amp..i think it's possible to uprate the superleach amp using 2sc5200/2sa1943,,A1941/C5198drivers, A940/C2073 Vas with 75-0-75VAC,1300va trafo..450Wrms@8ohm will be attainable..just my 2 cents.. ::) ;D

your dc unloaded rails will be +/-105volts, you will need to series connect 63volt capacitors.....
your chosen drivers are good up to rails of 75volts, you are at risk if you use it are 105volt rails....
also your Vas trannies must have Ft's in the 100mhz range para bumagay sa output devices mo na may 30mhz Ft's, the drivers must have same Ft's as your output devices...
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Re: DIY Leach Amp 700w 2R
« Reply #22 on: October 30, 2011, 07:43:54 AM »

Offline jbmobile

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Re: DIY Leach Amp 700w 2R
« Reply #23 on: October 30, 2011, 02:03:14 PM »
k.thanks sir tony..actually my semicons are based in a KDrock amp with similar trafo ratings..also have 2 pairs of 20,000uf/120vdc caps. maybe the on-semis are better..have to check specs
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Re: DIY Leach Amp 700w 2R
« Reply #23 on: October 30, 2011, 02:03:14 PM »

Offline jbmobile

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Re: DIY Leach Amp 700w 2R
« Reply #24 on: October 30, 2011, 08:28:37 PM »
@sir tony,i suppose mje15032/33 will do as vas and driver..r13/r14=8.2k,1W..for an 8 OPT per rail scheme what should be the ideal quiescent current for the OPT's?..how about the vas,does it need to be moded also and the VI limiter too? sorry too many querries.. nagtatanong lang po para matuto. ;D ;D
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Re: DIY Leach Amp 700w 2R
« Reply #24 on: October 30, 2011, 08:28:37 PM »

Offline tony

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Re: DIY Leach Amp 700w 2R
« Reply #25 on: October 30, 2011, 09:37:52 PM »
yes that will do...idle current depends on how big your heatsink is.....VAS can stay as it is, although there are better transistors, but for PA duties, the MJE340/350 will do......http://www.datasheetcatalog.org/datasheet2/4/08hjtccgzrjdwuujf11iuij75kky.pdf

Quote from: jbmobile on October 30, 2011, 08:28:37 PM
@sir tony,i suppose mje15032/33 will do as vas and driver..r13/r14=8.2k,1W..for an 8 OPT per rail scheme what should be the ideal quiescent current for the OPT's?..how about the vas,does it need to be moded also and the VI limiter too? sorry too many querries.. nagtatanong lang po para matuto. ;D ;D
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Offline tony

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Re: DIY Leach Amp 700w 2R
« Reply #26 on: October 30, 2011, 09:45:02 PM »
Quote from: jbmobile on October 30, 2011, 02:03:14 PM
k.thanks sir tony..actually my semicons are based in a KDrock amp with similar trafo ratings..also have 2 pairs of 20,000uf/120vdc caps. maybe the on-semis are better..have to check specs

i haven't seen a 120volt cap, the next standard value after 100 is 160v, but then who knows? did you get them surplus? any data?
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Offline chinokscapsighter

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Re: DIY Leach Amp 700w 2R
« Reply #27 on: October 31, 2011, 03:00:26 AM »
my nagbebenta na ganyang capacitor 10000/120v sa dipolog Zamboanga del norte... ;)
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Offline tony

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Re: DIY Leach Amp 700w 2R
« Reply #28 on: October 31, 2011, 06:45:40 AM »
^can you post brand and model number?
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Offline chinokscapsighter

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Re: DIY Leach Amp 700w 2R
« Reply #29 on: October 31, 2011, 01:33:32 PM »
hmmm... hindi ko na maalala sir... matagal na ka.c yung nakapunta ako sa mga electronic store sa dipolog...
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Offline jbmobile

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Re: DIY Leach Amp 700w 2R
« Reply #30 on: October 31, 2011, 08:38:44 PM »
@ sir tony,that20000uf/120v i got from the KDrock amp..i also happen to buy sometime ago @ loud n clear and ac/dc,cebu 100v,120v caps.they are chinese made caps.our local store here in dipolog once had 120v caps..will show pix of it maybe tomorrow na,together with our assembled amp.
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Offline chinokscapsighter

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Re: DIY Leach Amp 700w 2R
« Reply #31 on: November 01, 2011, 12:15:49 AM »
Wow taga dipolog ka pala Sis jbmobile... jan korin nabili yung IC na pang Mic effects wala kacing nagbebenta sa Dumaguete... :)
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Offline jbmobile

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Re: DIY Leach Amp 700w 2R
« Reply #32 on: November 03, 2011, 11:13:15 AM »
yup sis chinoks.i guees u hail from dumaguete also,and into PA i presume..I also bought FBT's at dumaguete 2 years ago,wala stock dire dipolog @ that time..am more into audio/mobile nowadays,passed on my shop to my partner..nakakatamad na magrepair,a case of burn out i guess..
  @sir tony sorry/will try to post pix of caps ASAP..gotta have to wrap up my sat dish installs today..daming naghahabol sa upcomig Pacquiao-marquez fight kc..  :D :D
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Offline chinokscapsighter

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Re: DIY Leach Amp 700w 2R
« Reply #33 on: November 04, 2011, 08:38:33 PM »
Wow sis  jbmobile maraming ka palang costumer... saang tindahan ka bumili dito sa dumaguete ng FBT sis... Meron din ka.c akong hinahanap na FBT walang stock dito sa Dumaguete Baka meron dyan sa dipolog...?
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Offline jbmobile

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Re: DIY Leach Amp 700w 2R
« Reply #34 on: November 04, 2011, 08:57:56 PM »
nakalimutan ko na pangalan store sis..pero meron pa ako receipt dun,lapit lang  SU..about FBT,paki type lang # at tv brand subukan hanapin bukas txt nalang kita..pm me ur cel#.punta kc ako ng AJ electronics bukas early AM..dun mo nakita big caps na 120v.
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Offline chinokscapsighter

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Re: DIY Leach Amp 700w 2R
« Reply #35 on: November 05, 2011, 01:07:56 PM »
ah ok sis baka bernardos ang name ng store ka.c malapit din yan sa SU... ito ang model no. KV-14jdr1 at ito ang number ng FBT nx-1723//m... salamat Sis... pero baka matagal kopa mabili ang FBT kung meron man.... hehehe :)
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Offline jbmobile

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Re: DIY Leach Amp 700w 2R
« Reply #36 on: November 08, 2011, 11:45:23 AM »
@ sir Tony..eto po sample ng caps..nabili na yung 20,000uF caps 2gether with  amp.. :D
 [url=http://img408.imageshack.us/img408/5200/img5263h.jpg]http://img408.imageshack.us/img408/5200/img5263h.jpg[/url]
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Offline tony

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Re: DIY Leach Amp 700w 2R
« Reply #37 on: November 08, 2011, 11:51:41 AM »
nice....sana meron sa raon nyan...

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Offline jbmobile

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Re: DIY Leach Amp 700w 2R
« Reply #38 on: November 08, 2011, 11:58:27 AM »
eto isa pa nasa  diy westrack amp namin.. ;D
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Offline tony

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Re: DIY Leach Amp 700w 2R
« Reply #39 on: November 08, 2011, 12:00:36 PM »
ano nga pala can diameters? marami akong clamps na pang 3inch...
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Re: DIY Leach Amp 700w 2R
« Reply #39 on: November 08, 2011, 12:00:36 PM »
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