Author Topic: Surplus amps (Read 991043 times)

jofkevski · « **Reply #150 on:** Oct 13, 2003 at 04:19 PM »

Quote from: iceman90a on Oct 13, 2003 at 02:58 PM

i see what you are getting at... admittedly the digital decoder of the kebao is cheap. magaspang tunog compared to having an AVR do the decoding, although a plus for the kebao vs nextbase is that it has an onboard DTS decoder (which is also cheap )

which is why i'm still on the lookout for an affordable receiver with pre-outs

That's the way to fly, brother!

akyatbundok · « **Reply #151 on:** Oct 13, 2003 at 04:37 PM »

ako rin! that's what i'll do. got the idea from jofkevski. an integrated amp with direct power/main-inputs solves the mixed HT/audio setup.

joan2, need your help.. sent you pm!

iceman90a · « **Reply #152 on:** Oct 13, 2003 at 04:37 PM »

Quote from: joan2 on Oct 13, 2003 at 04:09 PM

the power of murphy's law demostrated once more....i wonder who else got bitten....
i have had extensive experience in repairs of these amps, i have builtseveral power amps over the years, i can do repairs or you or i can look at your amps and tell you what you can do if you are interested in tweaking the insides o your amps,to me this is more challengin than to debate over cables and inter-conects, an i assure you that this is not as expensive.....

hi Sir,

tagal na ako interested sa gainclones nyo, lalo na ngayon that you can also repair/tweak amps

how do i get in touch with you?

thanks!

joan2 · « **Reply #153 on:** Oct 13, 2003 at 05:49 PM »

jofkevski ,
if you are planning that route, i suggest that you use the same model power amps, reason is that with the same amps, the gain of the amps will be identical, so that balancing will be easier than using dissimilar ones...just my 2 cents...

joan2 · « **Reply #154 on:** Oct 13, 2003 at 05:52 PM »

Quote from: iceman90a on Oct 13, 2003 at 04:37 PM

hi Sir,

tagal na ako interested sa gainclones nyo, lalo na ngayon that you can also repair/tweak amps

how do i get in touch with you?

thanks!

you can contact me at 6438957...look for tony...for starters, please read the post on my gainclone thread for links that will fill you in on info....
gainclones are bery easy to do, moonshow, a total newbie, was able to do it....thru the thread i started...

the pm on this forum doesn't seem to work for me...you mai email me at [email protected]....

akyatbundok · « **Reply #155 on:** Oct 13, 2003 at 06:43 PM »

Sansui AU-alpha707

click the pic!

things i like:
- glossy finish
- huge transformer
- beer can size capacitors
- isolation of pre/power/terminal sections
- power amp direct/main-inputs
- XLR balanced inputs
- gold plated RCA jacks
- big binding posts
- the big & warm sound!

BuLLeT · « **Reply #156 on:** Oct 13, 2003 at 07:12 PM »

Nice baby again akyat. You are indeed a patient hunter.

I hope this amp will not suffer the same fate as the hybrids hehehe

.

Congrats.

fakelondongenius · « **Reply #157 on:** Oct 14, 2003 at 12:21 AM »

congrats akyat!

bagong luma yan ah! yes, after the mid 80's sinubukan ulit ng Sansui bumawi. that time sa Japan nalang kasi ang market nila kaya gumanda ulit yung parts ng Sansui mo.

tungkol naman sa amp ko eh, ayos naman siya. sounds natural when i'm playing my marching band lp's. 150Watts is all i need. 1o o'clock high eh malakas na.

mabait yung mga manong tsaka si mommy. may kalawang na yung cover niya eh pero pina-repaint nila and it's 4 free

3 months free service warranty

next time siguro eh speakers naman:)

Leiko · « **Reply #158 on:** Oct 14, 2003 at 07:59 AM »

Quote from: joan2 on Oct 13, 2003 at 04:09 PM

i can do repairs or you or i can look at your amps and tell you what you can do if you are interested in tweaking the insides o your amps,to me this is more challengin than to debate over cables and inter-conects, an i assure you that this is not as expensive.....

This is indeed challenging. am considering getting an inexpensive HT receiver (like Sakura or Konzert) and tweak it to the max. My idea of tweak is parts replacement. Care to share what things to look at and replace?

akyatbundok · « **Reply #159 on:** Oct 14, 2003 at 08:30 AM »

i found another gem at the pier when i bought the sansui, pero defer ko lang muna pag post ng info, pinagiisipan ko pa kung kukunin as a replacement for one of my amps. di ako maka-decide if i should sell one of them to get this new one. we demo'd it and it sounded awesome.

thanks bullet. sana nga magtagal yang sansui. mahirap magkaroon ng "magic touch", yun bang lahat hawakan ay nasisira.

fakelondongenius, thanks & congrats din sa amp mo. ako din speaker ang susunod. actually may nahanap na ako pero di ko pa binibili.. having 2nd thoughts about the size, para kasing refrigerator na maliit hehe.

sir joan2, sent you email... HELP!

iceman90a · « **Reply #160 on:** Oct 14, 2003 at 09:46 AM »

Quote from: akyatbundok on Oct 14, 2003 at 08:30 AM

i found another gem at the pier when i bought the sansui, pero defer ko lang muna pag post ng info, pinagiisipan ko pa kung kukunin as a replacement for one of my amps. di ako maka-decide if i should sell one of them to get this new one. we demo'd it and it sounded awesome.

thanks bullet. sana nga magtagal yang sansui. mahirap magkaroon ng "magic touch", yun bang lahat hawakan ay nasisira.

fakelondongenius, thanks & congrats din sa amp mo. ako din speaker ang susunod. actually may nahanap na ako pero di ko pa binibili.. having 2nd thoughts about the size, para kasing refrigerator na maliit hehe.

sir joan2, sent you email... HELP!

baka naman pwedeng pa PM kung ano yun, tulong mo na lang sa naghihirap na pareho ang bisyo

akyatbundok · « **Reply #161 on:** Oct 14, 2003 at 10:00 AM »

hmmmm... sige

sent you pm bro.

u know the rules ha, risk palagi kung surplus. test mo mabuti if ever u decide to check it out.

iceman90a · « **Reply #162 on:** Oct 14, 2003 at 10:21 AM »

thanks! sent you PM again

jofkevski · « **Reply #163 on:** Oct 14, 2003 at 01:37 PM »

Quote from: joan2 on Oct 13, 2003 at 05:49 PM

jofkevski ,
if you are planning that route, i suggest that you use the same model power amps, reason is that with the same amps, the gain of the amps will be identical, so that balancing will be easier than using dissimilar ones...just my 2 cents...

Thanks for the reminder. This is the reason why I have to tag 2 identical integrateds (which can function as a separte) to buy in pier - to maintain gain and amp signature on sound.

joan2 · « **Reply #164 on:** Oct 14, 2003 at 05:10 PM »

Quote from: jofkevski on Oct 14, 2003 at 01:37 PM

Thanks for the reminder. This is the reason why I have to tag 2 identical integrateds (which can function as a separte) to buy in pier - to maintain gain and amp signature on sound.

yes, that is why gainclones are becoming popular, you can rig up a five channel amp on the same chassis....

Leiko · « **Reply #165 on:** Oct 14, 2003 at 07:33 PM »

joan2, added a discussion above re supertweaking of amps like sakura. care to share some thoughts on how to go about it? salamat!

joan2 · « **Reply #166 on:** Oct 15, 2003 at 06:34 AM »

any amplifier for that matter can be tweaked this way:
1. electrolytic caps in the signal path can be replaced by teflon, polypropylene or polycarbonate caps, in that order, mylars(polyethelyne) are a no-no.
2. bypass electrolylitic caps may can be shunted by films as i have mentioned in 1.
3. mica/creamic caps can be replaced with polystyrene caps..
4. caps used in the power supply can be made bigger, ie, a 4700uf changed to 10000, lower esr can be achieved by parralelling smaller caps than by just a single big cap. these caps can also be shunted by caps i mentioned in 1
5. the power transformer can be changed to one with a higher va rating, but of the same voltages..
6. power supply rectifiers can be changed to fast rectifiers or even schottky ones....
these are just starters, there are more....

those owning units with 100volts ac, this is the opportunity to change your transformers to higher va rating and with 220volts primary....

here is the link:
http://www.capacitors.com/pickcap/pickcap.htm

lance · « **Reply #167 on:** Oct 15, 2003 at 08:28 AM »

Mga sir, nagpunta kami ng friend ko yesterday sa isang surplus shop sa along aurora dito sa cubao halos malapit lang sa COD. ang daming surplus amps. may nakita nga kami na mga onkyo integra tulad nung kay akyat bundok. and mga mukhang ok pa ang condition. malilinis pa. ang dami...sarap tumingin..he he he i guess mas masarap bumili non......for FYI lang naman baka may gusto mag drop by don sa lugar.

GC · « **Reply #168 on:** Oct 15, 2003 at 09:33 AM »

sir joan2, sent you pm.

akyatbundok · « **Reply #169 on:** Oct 15, 2003 at 09:50 AM »

Quote from: lance on Oct 15, 2003 at 08:28 AM

Mga sir, nagpunta kami ng friend ko yesterday sa isang surplus shop sa along aurora dito sa cubao halos malapit lang sa COD. ang daming surplus amps. may nakita nga kami na mga onkyo integra tulad nung kay akyat bundok. and mga mukhang ok pa ang condition. malilinis pa. ang dami...sarap tumingin..he he he i guess mas masarap bumili non......for FYI lang naman baka may gusto mag drop by don sa lugar.

lance, paano puntahan yung shop? thanks for sharing the info bro... nadagdagan choices natin!

joan2, ill try to visit you this weekend sir (bringing my sick amp to the doctor

)... im learning alot from you even though i havent met you.

lance · « **Reply #170 on:** Oct 15, 2003 at 10:09 AM »

akyatbundok- :)dre, sa cubao yon along aurora blvd. malapit sa dating COD (ginigiba na yata yung COD). kung galing ka sa edsa at along aurora ang way mo dadaanan mo yung shop na yon. sa right side. pag umabot ka na sa sogo hotel. lampas ka na

madaming mga surplus na shop pero isa lang yung madaming mga amps. yung iba puro tv lang. puro mint condition pa kung titingnan eh..mga malilinis.

joan2 · « **Reply #171 on:** Oct 15, 2003 at 11:31 AM »

i can assure you, tweaking amps is just as exciting as cbles and interconnects, if not more. so if you find an amp which you value much and would like to keep for a long time, then this one is for you....

kinyo · « **Reply #172 on:** Oct 15, 2003 at 09:06 PM »

Quote from: jofkevski on Oct 13, 2003 at 02:47 PM

Then I will keep my Yamaha RX-V630 and will use its pre-out (L, R, surrounds no center). 8.1 are all my surrounds.

sir jofkevski ... meron po ba kayong User Manual ng RX-V630 nyo? kung meron man, pwede po bang makopya?

friend ko kasi gusto ipa-setup nang maayos ang HT nya kaso nawawala ang manual nya ... thanks

mods, excuse me muna kung OT ito

joan2 · « **Reply #173 on:** Oct 15, 2003 at 09:14 PM »

Quote

joan2, ill try to visit you this weekend sir (bringing my sick amp to the doctor )... im learning alot from you even though i havent met you.

yes, please do..you are welcome......

Philander · « **Reply #174 on:** Oct 15, 2003 at 09:19 PM »

Quote from: kinyo on Oct 15, 2003 at 09:06 PM

sir jofkevski ... meron po ba kayong User Manual ng RX-V630 nyo? kung meron man, pwede po bang makopya?

friend ko kasi gusto ipa-setup nang maayos ang HT nya kaso nawawala ang manual nya ... thanks

mods, excuse me muna kung OT ito

you may download the manual here:

http://www2.yamaha.co.jp/manual/pdf/av/english/re/RX-V630_e.pdf

or

http://www.yamaha.com/yec/customer/manuals/RX-V630_e.pdf

RDS model: http://www2.yamaha.co.jp/manual/pdf/av/english/re/RX-V630RDSe.pdf

kinyo · « **Reply #175 on:** Oct 15, 2003 at 10:57 PM »

thanks Philander!

wakanga · « **Reply #176 on:** Oct 16, 2003 at 03:39 PM »

guys bago lang ako dito maybe some of you might recognize my screen name, dami ako natutunan dito, tapos nandito din pala si sir joan2, eh talgang matututo nga tayo,:) sir tanong ko lang po, in setting up the audio part, kailangan ba seperate amp yung subwoofer sa mga sattelite speakes?kase im thinking pagsamasamahin ko yung apat na surround speakers tapos center speakers, saka yung dalawang 12" 350w na subwoofer ko sa isang amp lang. suggest nga po kayo ng magandang setup para sa balak ko, i prefer surplus amp lang po, bale ganito po gusto ko 4 surround speakers consist of tweeters and mid-range, 1 center speaker consist of two mid-range, and two subwoofer consist of two 12" 350w speaker. TIA

tamulmol · « **Reply #177 on:** Oct 17, 2003 at 12:09 AM »

mahusay talagang magpaliwanag si sir joan2....buti na lang madalas kayo dito... sir anong work nyo????OOngi.....EB minsan hehe....

joan2 · « **Reply #178 on:** Oct 17, 2003 at 08:29 PM »

Quote from: wakanga on Oct 16, 2003 at 03:39 PM

guys bago lang ako dito maybe some of you might recognize my screen name, dami ako natutunan dito, tapos nandito din pala si sir joan2, eh talgang matututo nga tayo,:) sir tanong ko lang po, in setting up the audio part, kailangan ba seperate amp yung subwoofer sa mga sattelite speakes?kase im thinking pagsamasamahin ko yung apat na surround speakers tapos center speakers, saka yung dalawang 12" 350w na subwoofer ko sa isang amp lang. suggest nga po kayo ng magandang setup para sa balak ko, i prefer surplus amp lang po, bale ganito po gusto ko 4 surround speakers consist of tweeters and mid-range, 1 center speaker consist of two mid-range, and two subwoofer consist of two 12" 350w speaker. TIA

subwoofers with cut-off frequency below 120 hz is non-directional, kung hinde kalakihan ang listening room mo, you can do with just one, placement is also non-critical, you can make a center table out of your sub-woofer...subwoofers require a lot more power than mid and highs, so you can bridge one amp to make it a subwoofer amp and another amp for the mid/highs...be sure to get identical amps to get your balancing easy and avoid guesswork....

joan2 · « **Reply #179 on:** Oct 17, 2003 at 08:34 PM »

Quote from: tamulmol on Oct 17, 2003 at 12:09 AM

mahusay talagang magpaliwanag si sir joan2....buti na lang madalas kayo dito... sir anong work nyo????OOngi.....EB minsan hehe....

ofw ako, i spent several years in africa, then singapore doing electrical/instrument work on oil and gas refineries, hobby ko lang ang electronics, i never really made a carreer out of this....ang tinapos kong course ay electrical engineering at the national university circa 1975....