Author Topic: SAKURA AV-200T Tube Amp (Read 356099 times)

oopsydaisy18 · « **Reply #900 on:** Dec 17, 2013 at 02:51 PM »

Good PM mga sir,

pu-pwede po bang ikabit ko dito yung konzert 200v ko? 200watts po ata yun speaker.. salamat sa reply!

roygee · « **Reply #901 on:** Dec 19, 2013 at 11:06 AM »

gudam sirs,

an officemate of mine asked me to build her a 2 channel set-up, budget is 10 to 12K.. i was thinking of getting her a sakura tube amp, which still gives me an ample budget for speakers..

anong speakers ang mag match kaya dito? please be specifc sa models na ma-reco niyo, thanks in advance!

balarila · « **Reply #902 on:** Dec 19, 2013 at 11:16 AM »

I got a pair of used Wharfedale 9.1 in excellent condition from one of the members in this forum. Very happy with my setup.

Also got an ipod cradle from Sulit. Have you also budgeted for your source?

roygee · « **Reply #903 on:** Dec 19, 2013 at 11:27 AM »

Quote from: balarila on Dec 19, 2013 at 11:16 AM

I got a pair of used Wharfedale 9.1 in excellent condition from one of the members in this forum. Very happy with my setup.

Also got an ipod cradle from Sulit. Have you also budgeted for your source?

thanks for the reco, will try out wharfs with sakura.. malamang brandnew na kunin since she's in a hurry

source will be an ipod/android phone, malamang an ipod dock or bluetooth receiver will do. told her on-top of the budget pa yun, pati a voltage regulor.

how much pala inabot yung ipod dock niyo sir?

balarila · « **Reply #904 on:** Dec 19, 2013 at 01:42 PM »

Got a cheap but very nice Maxell Ipod Dock from Sulit for only P800. It can charge while connected to the amp and also includes different cradles for different kinds of ipod.

TOP 20 · « **Reply #905 on:** Dec 20, 2013 at 12:12 AM »

Recently bought the hotrod AV-200T from Rene Rivo.

Per balarila, okay na ka match ang Wharfedale 9.1. How about with the 10.1, may nakasubok na ba?

Thanks!

mixxx30 · « **Reply #906 on:** Dec 25, 2013 at 04:17 PM »

Merry Christmas sirs! I'm planning to buy a sakura tube amp where can I buy one na ok price and what's the best bookshelf speaker that I can pair with it? Thanks!

sansui · « **Reply #907 on:** Jan 15, 2014 at 10:43 AM »

I bought a Sakura av-200T last December. Everytime time I turn it on, there is a humming sound fron my speakers that gets louder that finally terminates to a very loud popping sound. All these happens in a span of about 5 seconds. The av-200T then plays on as usual. I thought this was normal for the av-200T until yesterday when I noticed my Wharfedale speakers giving rattling sounds on normal listening volume. On inspection, it turned out that everytime I turn on the av-200T, the popping sound is actually caused by a huge speaker cone excursion caused by this amplifier. Sad to say, the rubber surrounds on both of my Wharfedales are torn. Can anyone help? Thank you in advance.

remington · « **Reply #908 on:** Jan 15, 2014 at 11:01 AM »

baka may warranty pa yan sir ibalik mo dun sa binilihan mo...

m0b1u5 · « **Reply #909 on:** Jan 15, 2014 at 11:10 AM »

Quote from: sansui on Jan 15, 2014 at 10:43 AM

I bought a Sakura av-200T last December. Everytime time I turn it on, there is a humming sound fron my speakers that gets louder that finally terminates to a very loud popping sound. All these happens in a span of about 5 seconds. The av-200T then plays on as usual. I thought this was normal for the av-200T until yesterday when I noticed my Wharfedale speakers giving rattling sounds on normal listening volume. On inspection, it turned out that everytime I turn on the av-200T, the popping sound is actually caused by a huge speaker cone excursion caused by this amplifier. Sad to say, the rubber surrounds on both of my Wharfedales are torn. Can anyone help? Thank you in advance.

having experienced a similar thud sound from my amplifiers, I thought of a solution using markcrenz creation. I used his amplifier switch so that there will be no connection to my speakers when I turn the power on. Then I toggle the switch after a few seconds and voila, not more thud sound. My amp will be due for modification soon and the thud sound may disappear but i will still keep the setup as a safety measure.

sansui · « **Reply #910 on:** Jan 15, 2014 at 05:53 PM »

Thanks for the tip m0b1u5. I also contemplated on doing something like that switch but only simpler. I thought of putting an on/off switch in the wiring between the speakers and the smp. However, I thought that it is too bothersome and that I might forget about it and cause damage to my other speakers. I finally decided to have my av-200T modded by master Rene Rivo - to "cure" the speaker damaging pop and improve the overall sound quality and reliability of the amp. I will be bringing it to master Rene Rivo this coming February. Although it still has a warranty, I believe the tweaks of master Rene Rivo is better worth my time and effort. As for the damaged rubber surrounds of my Whafedales, I will have it repaired to the speaker doctor in Paco, Manila.

esr101 · « **Reply #911 on:** Jan 15, 2014 at 07:29 PM »

I have a modified amp by Rene Rivo. When turning it on, no pop. Turning it off there's still a pop sound. What i usually do is not turn the amp off immediately. I let it stay on for around 5 mins then turn it off. That way I don't get the pop sound when i turn it off.

The modified amp is definitely way better than the stock one.

sansui · « **Reply #912 on:** Jan 15, 2014 at 07:49 PM »

Hi esr101! Mine has no popping sound upon turning off. The turning on is the problem. The loudness of the popping sound after the humming a few seconds upon powering can only be described as "jarring" . As I mentioned, loud enough that the excursion of the speakers destroyed the woofer's rubber surround. But if the amp has warmed up then you power it off then turn it on within a minute, there is no destructive humming and popping sound. I am curious. Is the popping sound you experience upon powering off as loud as what I am experiencing when turning my amp on? I am disappointed and quite frustrated but I am charging this to experience. I'll be more cautious next time.

esr101 · « **Reply #913 on:** Jan 15, 2014 at 08:14 PM »

i'm not sure if we have the same problem. i think it's different as mine does not have a humming sound when turning it on. When tiurning it on mahina lang din yung pop sound na naririnig ko and i don't hear it if i don't immediately turn it off.

Bring it to Rene Rivo, the mods might help you out.

markymark8386 · « **Reply #914 on:** Jan 22, 2014 at 09:15 AM »

Hi guys.

Anong gamit nyo to connect your ipod sa ampli na ito?

markymark8386 · « **Reply #915 on:** Jan 22, 2014 at 09:30 AM »

Sa haba nung thread ang hirap po mag backread....

Any trusted shops where i can purchase this?

tony · « **Reply #916 on:** Jan 22, 2014 at 10:54 AM »

you can also pm jojod, he can help you....

markymark8386 · « **Reply #917 on:** Jan 26, 2014 at 09:19 AM »

Hi guys i just got my bnew sakura av200T from martcom raon for our bedroom setup. We actually have a spare pair bookshelf from our old mini component. Or, am I better off getting used speakers instead?

sansui · « **Reply #918 on:** Jan 27, 2014 at 07:16 AM »

My Sakura AV-200t is now cured of its speaker damaging hums and pops on start-ups. It also has a warmer and mellower sound now. Thank you master Rene Rivo!

navtech64 · « **Reply #919 on:** Jan 28, 2014 at 04:09 PM »

[img][img]Got my Sakura AV-200T Tube Amp a month ago. So far so good...dati NAD amp ang gamit ko pero binenta ko na a year ago, now nagbalik loob ulit ako sa Audiophile world, talagang nasa dugo ko na since bata pa nnakagisnan ko na ang mga tube amps di lang amp pati tube na TV, madalas ko sinisilip ang loob ng TV...its glowing! getting back to Sakura Tube Amp at first medyo hesitant pa ako kasi ang mura compare sa mga locally made tube amp ranging to 20K, one day nasa sta lucia ako sa Western Appliance na spot ko ito naka display at naka hook up at tumutunog so I started to listen to it then ayun na convinced ako sabi ko i try ko nga ito as a bday gift ko ask ko kay mrs.eh agree agad sya pa nga bumile, nagulat ang mga salesman kasi 1st time daw na babae ang bumibile ng tube amp. So excited na ako hook ko sa 22 yrs old Mission 761i speakers BOOM!malinis ang tunog at warm ang tunog...more than 6 hrs non stop playing...syempre torture test, ginamitan ko pa ng ng pang Burn-IN ng Sheffield Lab CD (rare na ito). Til now enjoy pa rin ako dito sa amp na ito, hook ko rin sa Bose InterAudio speakers, pero mas gusto ang clarity ng mission speakers, pero nag dagdag ako ng subwoofer for bass extension. I think stick muna ako sa stock ng Sakura AV-200T, di pa naman ako nauulol eventually siguro pa modified ko add ko ng phono input...bagay yata ang tube amp sa turntable. OK guys happy listening!

xbase · « **Reply #920 on:** Jan 28, 2014 at 04:11 PM »

congrats navtech64...

tony · « **Reply #921 on:** Jan 28, 2014 at 07:06 PM »

Service Bulletin:

1. this unit had a hairline crack on the board, very hard to see
with naked eye...

2. in order to avoid cathode poisoning, the two sections
of the triode buffers must be paralleled with jumpers,
in the picture, you will see that pin 1 and 6 are already
connected via pcb traces, so that two wire jumpers are
needed to complete the paralleling mod...

the 6N2 tubes are replaced with Japanese 6r-rh2 FUTABA triodes
which are better suited to lower voltages than the 6N2...

JojoD818 · « **Reply #922 on:** Jan 28, 2014 at 08:52 PM »

I won't consider cathode poisoning a biggy here, if it is, then I'll veer away from that tube pronto. Though paralleling the two sections ages them at the same time, shares the measly current passing through it and doubles the gm.

I second that changing the tube to something that can operate on lower plate volts is most welcome, imho. I don't like the original "starving" arrangement, feed them right and they serve you right.

tony · « **Reply #923 on:** Jan 28, 2014 at 09:03 PM »

maybe, pero kung ikaw ang matapatan malas mo lang....
i have two units bought to me with the symptom,
tubes light up but not working,
replacing the tube briought it back to life....

actually just about any tube with the B9 base should work,
being of the cathode follower configuration,
in effect 100% feedback, so that it works all the time

JojoD818 · « **Reply #924 on:** Jan 28, 2014 at 11:56 PM »

fragile stock tubes... I made a JLTi monoblock hybrid that only uses one section of a 6922 and it still works, more than 10 years already.

tony · « **Reply #925 on:** Jan 29, 2014 at 07:54 AM »

Quote from: JojoD818 on Jan 28, 2014 at 11:56 PM

fragile stock tubes... I made a JLTi monoblock hybrid that only uses one section of a 6922 and it still works, more than 10 years already.

thousands of 6n2 tubes to dispose that's why.....
at 500 bucks, easily the best deal in PDVD last year,
the 7806 ic for filament supply fried taking the power transformer with it,
my fix was just a resistor to limit current, no more semicons that can fry.....

markymark8386 · « **Reply #926 on:** Jan 29, 2014 at 08:02 AM »

Na no-nose bleed ako. Too many jargons hehe

tony · « **Reply #927 on:** Jan 29, 2014 at 08:10 AM »

Quote from: markymark8386 on Jan 29, 2014 at 08:02 AM

Na no-nose bleed ako. Too many jargons hehe

your technician will understand......
also these posts will show up in search engines so that
those looking for info will find them useful.

markymark8386 · « **Reply #928 on:** Jan 29, 2014 at 08:32 AM »

Guys. May spare jvc speakers kami from mini-component na balak ikabit sa sakura ko but its in my parents house pa.
Or, am i better of getting bookshelfs? Im thinking budget wise.

tony · « **Reply #929 on:** Jan 29, 2014 at 08:37 AM »

^i use a pair of aiwa mini-compo speakers, the rest of the minicompo electronics
are no longer servieable, but the speakers are still good, i use them to test new amps....

simmilar to this one: