About Vacuum tubes, Class A, & Hi-Fi

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About Vacuum tubes, Class A, & Hi-Fi

Post by nerfe on Wed Oct 03, 2012 11:54 pm

Mukhang wala pa dito, just for point of interest, discussion, or actual diy'ed projects please post here Smile

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by 01110011 on Thu Oct 04, 2012 7:53 pm

uy! si sir efren whahahaha Very Happy
napadpad ka sa lair ni ate ultra? Very Happy Very Happy Very Happy congratulations

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by danny on Fri Oct 05, 2012 2:09 pm

wahahaha sir efren welcome
napansin ko agad yung avatar nyo Very Happy Very Happy Very Happy

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by ultrasonic™ on Fri Oct 05, 2012 5:38 pm


gusto kng mg actual nito. kaso wlang availablr na vaccum tube dito sa area ko (T_T


sir efren welcome dito.. pgpasenxahan nyu na... mgugulo tlga ang dlwang nasa itaas ko (^_^

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by 01110011 on Sat Oct 06, 2012 11:47 am

^ikaw nga yung pinakamagulo eh Razz Very Happy Very Happy Very Happy

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by danny on Sat Oct 06, 2012 12:02 pm

ultrasonic™ wrote:
gusto kng mg actual nito. kaso wlang availablr na vaccum tube dito sa area ko (T_T


sir efren welcome dito.. pgpasenxahan nyu na... magulo talaga ako (^_^

Very Happy

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by nerfe on Sat Oct 06, 2012 3:09 pm

danny wrote:wahahaha sir efren welcome
napansin ko agad yung avatar nyo Very Happy Very Happy Very Happy
binaligtad ko lang sir yung username, may kapangalan na daw ako Wink

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by nerfe on Sat Oct 06, 2012 3:13 pm

01110011 wrote:uy! si sir efren whahahaha Very Happy
napadpad ka sa lair ni ate ultra? Very Happy Very Happy Very Happy congratulations
oo nga, napansin ko halos mga taga-elab yata...
:grophug:

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by nerfe on Sat Oct 06, 2012 3:14 pm

01110011 wrote:uy! si sir efren whahahaha Very Happy
napadpad ka sa lair ni ate ultra? Very Happy Very Happy Very Happy congratulations
oo nga, napansin ko halos mga taga-elab yata...
:grophug:

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by danny on Sat Oct 06, 2012 3:27 pm

Very Happy ayos

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by nerfe on Sun Oct 07, 2012 12:25 am

papahinog pa ng konti bago ko simulan, not allowed pa to post links Laughing

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by nerfe on Sun Oct 07, 2012 12:29 am

ultrasonic™ wrote:
sir efren welcome dito.. pgpasenxahan nyu na... mgugulo tlga ang dlwang nasa itaas ko (^_^
salamat po, nasanay na ko sa magugulo lol!

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by danny on Sun Oct 07, 2012 2:22 pm

Very Happy Very Happy Very Happy

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by ultrasonic™ on Mon Oct 08, 2012 12:21 pm

nerfe wrote:papahinog pa ng konti bago ko simulan, not allowed pa to post links Laughing

oie abangan namin yan sis efren. tiyak masarap ang pgkakaluto nyan. for the link ako bhala. mlakas angf powers ko dito (^_^

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by arkin on Mon Oct 08, 2012 6:33 pm

paabang din...

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by danny on Tue Oct 09, 2012 3:58 pm

ako din Very Happy

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by nerfe on Wed Oct 10, 2012 10:01 pm

for starters, begin with basic tube operation:

turneraudio.com.au/basic-tube-1.html


just copy paste the link, adding "www"followed by a dot at the beginning of the link, i'm not allowed to post links as of the moment Wink

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by ultrasonic™ on Tue Oct 16, 2012 6:36 pm



Basic Tube
tnx nito sir efren +1.. mapa PDF nga ito. (^_^




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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by ultrasonic™ on Tue Oct 16, 2012 6:43 pm


sir pwde bang simulan ko ng magtanong?

ano ba ang Class A amp pg dating sa Sound Quality? lol!

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by nerfe on Wed Oct 17, 2012 2:44 pm

weehh, di daw alam oh Razz

pero para sa kaalaman ng di pa alam (exept master admin ultra Laughing )
sagutin natin sa maabot ng aking kaalaman at base sa kaalaman ng hobbyist at diy'er, di po ako engineer.

Sa karaniwan ang mga amp na commercially available at yung maging common sa mga consumer audio systems gaya ng component system at home audio ay nasa uring class AB, maging IC type (gainclone) o kaya transistorized/mosfets (bjt), isama narin natin ang vacuum tubes.

Balikan natin ang tanong: "Ano ba ang class A pagdating sa sound quality?"

Sagot:

Sound Quality-ang class A ay kinokonsiderang superior sa sonic o sound quality ng mga engineers, hobbyists, at "audio purist" o yung mga may "golden ears Laughing " kumpara sa class AB.

ito ay very natural sounding lalo na kung ang gamit mo na sources ay Vinyl(turntable), CD, Flac, magnetic tape reel...

Ito ay dahil sa ang class A ay walang "crossover distortion" kumpara sa ibang classes ng amplification sa kadahilanang ang output devices ay laging naka "on" o nasa full idling current, kaya kung ano ang pumasok yun din ang lalabas, ang nabago lang amplitude o lakas pagdating sa output. Ito rin ang dahilan kung bakit napakainit ng operation ng class A at masyadong mababa ang efficiency. ang heatsink na kailangan ng isang 10W class A ay kasing laki ng heatsink ng 500W class AB.


Kung ganon bakit di ito popular tulad ng class AB?

hindi ito viable for commercialization, mataas ang production costs, walang magnenegosyo ng palugi dahil konti lang ang bibili ng class A dahil sa mahal.

May available naman na mga class A amps na medium power(25-50Watts/ch) ngunit ang halaga ay dalawa hanggang tatlong beses ang taas sa isang 500watts class AB na power amp.

sa kabilang banda di ito sagabal upang matikman ng inyong mga tenga ang tunog ng class A, ang low-power (5Watts-10Watts rms/channel) ayon sa mga pag-aaral ay sobra sobra na kung gamit pangbahay lang. Kaya nasa advantage ang mga DIY'ers at hobbyists pagdating sa ganitong aspeto.

Narito ang link ng class A amp na popular sa mga class A fanatics:
http://www.tcaas.btinternet.co.uk/

for educational or intro to class A world here is a 5W lo-cost amp you can build.
http://www.redcircuits.com/Page80.htm

sample of my transistorized JLH class A 10W/ch



sample of my class A tube


Smile

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by james on Wed Oct 17, 2012 6:33 pm

Paabang ng matuto rin sa usapang tubo.

San ba makakbili ng mga iyan. Raon, deeco at mga katabi lang ang alam ko eh.

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by triac on Sat Oct 20, 2012 9:52 am

ano po ang avantage ng vacuum tube sa transistor or IC?mayroon sa father ko noon pro sira na.

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by nerfe on Sat Oct 20, 2012 12:29 pm

james wrote:Paabang ng matuto rin sa usapang tubo.

San ba makakbili ng mga iyan. Raon, deeco at mga katabi lang ang alam ko eh.
yes, stll available at Deeco, mostly Japanese & Czechoslovakian made, watsons also still sell tubes...


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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by james on Sat Oct 20, 2012 9:00 pm

Meron ka po bang sample dyan sir ng tube amp schematic na pwedeng mabili sa deeco or watson? Maski sa preamp man lang muna para makapagsimula at yun iba pang pyesa. Para makabuo naman kami.

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Re: About Vacuum tubes, Class A, & Hi-Fi

Post by nerfe on Sat Oct 20, 2012 11:19 pm

james wrote:Meron ka po bang sample dyan sir ng tube amp schematic na pwedeng mabili sa deeco or watson? Maski sa preamp man lang muna para makapagsimula at yun iba pang pyesa. Para makabuo naman kami.
a good start here http://www.shine7.com/audio/12ax7_pre.htm, 12ax7 is available at Deeco, sockets at Watsons or Electromark,...

Be warned that tubes operate at lethal voltages, know the risks involve & learn the basics first.

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Re: About Vacuum tubes, Class A, & Hi-Fi

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