Topic: Tube Integrated Amplifier

[dblarano]

 I want to buy a tube amplifier but I don't know what to pick out. I want just an amp which can deliver pure, clean music.
Anybody can help me. I will visit Phasetron Audio maybe on the middle of August.
I have an existing speakers, Cerwin Vega, Wharfedale,and Family Floorstander.

Please help me.

[reynold]

Hi bro, you may wanna try some of my cousin's Tube Amp and Pre-amp DIY. Baka mas maka-mura ka at pwede mo pa pa-customized kung ano ang gusto mo. Try to Contact him na lang, di ka magsisisi sa mga gawa nya, lalung-lalo na sa Sound Quality

Here's his Name and Contact No. 

Ruel Felix
0918-4520558

Goodluck Bro

[Adam Warlock]

Audition  bring your favorite CD. Don't rely on others comment and get the best sounding for you, after all youre the one who's buying and will listen 

[jpeg]

Audition  bring your favorite CD. Don't rely on others comment and get the best sounding for you, after all youre the one who's buying and will listen 

I second the motion!

[cybermms]

Plenty of Tube Amps at the 08Alabang Audio Fair, Aug 8-10. Audition there!

cyber

[BigBert-2]

I want to buy a tube amplifier but I don't know what to pick out. I want just an amp which can deliver pure, clean music.
Anybody can help me. I will visit Phasetron Audio maybe on the middle of August.
I have an existing speakers, Cerwin Vega, Wharfedale,and Family Floorstander.

Please help me.

Bro, Have you visited Kinetic aka "Phasetron" ? They are now on sale and one more thing is that they will let you audition as many available tube amp on display as possible. It will really help you decide which amp will suit your taste.

 

[alexg]

Audition!

Also ask people who bought locally made tube amps their experiences, a friend has repaired some locally made tube amps that loves to go "red plates" hehehehe.... These amps came from the same store.

Also check the quality of the "Irons", some of them get so hot, you can fry an egg on it.

Some local "gurus" also will use some surplus parts so that their margin/profit is more. I had this experience of having somebody build me an equipment, and the PSU caps came from computer PSUs and the power transformers were wound using cardboard as layer insulation with  masking tapes! 

So audition, ask people who have tubed equipment before forking your money.

[Philjonc]

Audition!

Also ask people who bought locally made tube amps their experiences, a friend has repaired some locally made tube amps that loves to go "red plates" hehehehe.... These amps came from the same store.

Also check the quality of the "Irons", some of them get so hot, you can fry an egg on it.

  hmmmmm....

[Adam Warlock]

Audition!

Also ask people who bought locally made tube amps their experiences, a friend has repaired some locally made tube amps that loves to go "red plates" hehehehe.... These amps came from the same store.

Also check the quality of the "Irons", some of them get so hot, you can fry an egg on it.

Some local "gurus" also will use some surplus parts so that their margin/profit is more. I had this experience of having somebody build me an equipment, and the PSU caps came from computer PSUs and the power transformers were wound using cardboard as layer insulation with  masking tapes! 

So audition, ask people who have tubed equipment before forking your money.

Interesting....

[RU9]

Audition!

Also ask people who bought locally made tube amps their experiences, a friend has repaired some locally made tube amps that loves to go "red plates" hehehehe.... These amps came from the same store.

Also check the quality of the "Irons", some of them get so hot, you can fry an egg on it.

Some local "gurus" also will use some surplus parts so that their margin/profit is more. I had this experience of having somebody build me an equipment, and the PSU caps came from computer PSUs and the power transformers were wound using cardboard as layer insulation with  masking tapes! 

So audition, ask people who have tubed equipment before forking your money.

Hear! Hear!

[John E.]

 

[karce]

Audition!

Also ask people who bought locally made tube amps their experiences, a friend has repaired some locally made tube amps that loves to go "red plates" hehehehe.... These amps came from the same store.

Also check the quality of the "Irons", some of them get so hot, you can fry an egg on it.

Some local "gurus" also will use some surplus parts so that their margin/profit is more. I had this experience of having somebody build me an equipment, and the PSU caps came from computer PSUs and the power transformers were wound using cardboard as layer insulation with  masking tapes! 

So audition, ask people who have tubed equipment before forking your money.

Kakatakot ito sir a... for people tulod namin na hindi masyadong technical maiisahan talaga kami

Better buy those branded ones nalang siguro.  At least may warranty and ISO standards.  Good thing is dumadami na rin mga branded tube amps na affordable lately sa market tulad ng Cayin at iba pa.

[RU9]

Also check the quality of the "Irons", some of them get so hot, you can fry an egg on it.

alexg,

is it possible that the "irons" get hot due to amp's  "Class A" design?

louie
 

[ATJr.]

is it possible that the "irons" get hot due to amp's  "Class A" design?

pwede, classA designs are heat mongers ....but on the serious side is, the design was conservative to start with, tinipid yung bakal...more iron means less profit....

[alexg]

alexg,

is it possible that the "irons" get hot due to amp's  "Class A" design?

louie
 

Even at Class A, you should be able to hold the power transformers, but this one you cannot hold for more than 10 seconds. If you can't hold them, then you might want to back down on your bias.

My winder uses Z11 on my power transformers and all of my tube amps are Class A, these transformers gets warm after about a day of use, but not HOT. Believe me, I like some things very hot, like my coffee and my women, but not the irons on my tube amps! 

I am not an expert on transformers, but I  know that low quality cores (H50 or H20) heats up like crazy and they are CHEAP! Aside from the overheating, these cores have a lot of  losses. Since the tube amp have transformer cover, I can't tell if the cores used are H50 ro H20, but even with the transformer cover on, the cover gets very, very hot to the touch! 

[reynold]

hhhmmmm.... ano kayang brand 'to

[RU9]

I am not an expert on transformers, but I  know that low quality cores (H50 or H20) heats up like crazy and they are CHEAP! Aside from the overheating, these cores have a lot of  losses. Since the tube amp have transformer cover, I can't tell if the cores used are H50 ro H20, but even with the transformer cover on, the cover gets very, very hot to the touch! 

Will this result to the "red plate" defect or what causes this?

Thanks,

Louie

[alexg]

Will this result to the "red plate" defect or what causes this?

Thanks,

Louie

This will not result in red plates. Red plates happen when there is too much current, way beyond the recommended by the tube manufacturer is passing through the tube. Which means that tubes are operated past its designed plate dissipation.

Shorted bypass cathode capacitor can result in red plates as well as bad "fixed bias" voltage supply. Some designers will also push a tube "too hot" (beyond plate dissipation capacity of the tube) and this will result in red plates too. Pushing tubes beyond or near their limits is done to extract more power from the tubes. So if you see a PP KT88 rated at 100+ watts per channel, it is pushing the tubes to its limits. 

The use of low quality iron cores (H20, H50) will turn your amp into a room heater, great if you live in a temperate country in the middle of winter! 

[RU9]

This will not result in red plates. Red plates happen when there is too much current, way beyond the recommended by the tube manufacturer is passing through the tube. Which means that tubes are operated past its designed plate dissipation.

Shorted bypass cathode capacitor can result in red plates as well as bad "fixed bias" voltage supply. Some designers will also push a tube "too hot" (beyond plate dissipation capacity of the tube) and this will result in red plates too. Pushing tubes beyond or near their limits is done to extract more power from the tubes. So if you see a PP KT88 rated at 100+ watts per channel, it is pushing the tubes to its limits. 

Thank you for the info.

Louie

[ATJr.]

My winder uses Z11 on my power transformers

these are DEECO irons, compared to M6 GOSS, you need more copper on them....they can be made to run cool...

[oweidah]

these are DEECO irons, compared to M6 GOSS, you need more copper on them....they can be made to run cool...

btw, parang nakita ko dati may mga nagpapagawa ng transformers sa golden mars. meron din yata sila raw materials used for trannies.  ok kaya dun?

[ATJr.]

btw, parang nakita ko dati may mga nagpapagawa ng transformers sa golden mars. meron din yata sila raw materials used for trannies.  ok kaya dun?

doon ako bumubile ng magnet wires, di to pa natry magpagawa sa kanila.....pero along shaw blvd. makalampas ng "moon palace",(or malapit doon) merong store na tumatanggap ng made to order na transformers....

[Jagner]

doon ako bumubile ng magnet wires, di to pa natry magpagawa sa kanila.....pero along shaw blvd. makalampas ng "moon palace",(or malapit doon) merong store na tumatanggap ng made to order na transformers....

Excel?

Yung mga trannies ko, pinapagawa ko sa Lily Anns in Gateway, Cubao... Ok naman    I just make sure that I give it a lot of headroom para hindi mag-init 

[ATJr.]

Excel?

Yung mga trannies ko, pinapagawa ko sa Lily Anns in Gateway, Cubao... Ok naman    I just make sure that I give it a lot of headroom para hindi mag-init 

yung nga, ang gawa ko, i design for say a 1 1/4 inch x 1 1/2 core, then i ask the store to use a 1 1/2 inch x 2 inch core, this way the traffo runs cooler....

[alexg]

yung nga, ang gawa ko, i design for say a 1 1/4 inch x 1 1/2 core, then i ask the store to use a 1 1/2 inch x 2 inch core, this way the traffo runs cooler....

That is a good practice, de-rating of parts, how about losses? Would low quality cores have power losses, as they generate heat? How much is wasted on these losses? (am not an iron expert, so am asking these questions). Thanks.

[ATJr.]

That is a good practice, de-rating of parts, how about losses? Would low quality cores have power losses, as they generate heat? How much is wasted on these losses? (am not an iron expert, so am asking these questions). Thanks.

cores have a certein amount of loss based on weight, but then operating them at low exciting currents and bigger wire sizes means losses can be decreased....it is a balancing act no less....

[aHobbit]

... but then operating them at low exciting currents and bigger wire sizes means losses can be decreased....it is a balancing act no less....

err ... i beg your pardon ... bigger wires will mean more losses ... less profit that is     


Don't be caught in the hype ... we are in a commercial jungle ... do you assignment before plunging ... the only sure path to an enjoyable listening!

My kudos to alexg ... mabuhay ka bro!

[ATJr.]

err ... i beg your pardon ... bigger wires will mean more losses ... less profit that is     


Don't be caught in the hype ... we are in a commercial jungle ... do you assignment before plunging ... the only sure path to an enjoyable listening!

My kudos to alexg ... mabuhay ka bro!

LOL!!! yes....that is why diy'ers are not constraind by accountants....production run being one.....one can splurge and splurge big.....

DIY'ers do not have to think about profits......

[Jagner]

LOL!!! yes....that is why diy'ers are not constraind by accountants....production run being one.....one can splurge and splurge big.....

DIY'ers do not have to think about profits......

That's the essence of DIY....

[alexg]

Also ask people who bought locally made tube amps their experiences, a friend has repaired some locally made tube amps that loves to go "red plates" hehehehe.... These amps came from the same store.

I was just informed that these amps who loves to go red plate were modified after leaving the store.

Sorry for the confusion.