Author Topic: My Tube Journey (Read 210320 times)

Abad Santos 7 · « **Reply #300 on:** Feb 10, 2015 at 08:58 PM »

Quote from: tony on Feb 10, 2015 at 07:34 AM

if you noticed it, the 6L6, El34, 6550, KT88 have the
same pin-outs so you have a lot of choices..
just jumper pin 1 and 8 and you are good to go,,
you can use the same circuit i posted above...

the above topology is what i use when doing power amps
of more than 30 watts, Patrick turner seems to like it...
it was borne out of the mullard 5-20 input and phase splinter topology..
many amps used the same like harman citation 5, and even the carver silver 7....

90% of tube amps is the output transformer...
get the OPT right and you can have a mighty fine tube amp..
you can ask Edrel to make one for you using M6/Z11 cores,
i am willing to help you out should you decide to build one...
KT88's can now be purchased localy at a very reasonable price...

Sir Tony,

Once natapos ung current project ko, sigurado ito ang next.

Would definitely ask for some help.

Regards,

tony · « **Reply #301 on:** Feb 11, 2015 at 09:51 AM »

Quote from: Abad Santos 7 on Feb 10, 2015 at 08:58 PM

Sir Tony,

Once natapos ung current project ko, sigurado ito ang next.

Would definitely ask for some help.

Regards,

sure, i am happiest when dealing with fellow diy'ers...

tony · « **Reply #302 on:** Feb 11, 2015 at 10:18 AM »

just as we were beginning to enjoy this amp, one tube bacame gassy....

so what to do?
well, i replaced to octal socket to septar 7 pin socket once more,
this amp has gone full circle, from a failed 829b set to a 5898....http://www.r-type.org/exhib/aaa0001.htm

the difference between the 829 and 5894 tubes are:
1. 5894 has a single cathode, this makes the transconductance identical for both plates
since there is only one source of cathode currents unlike in the 829b which had two cathodes tied together..
2. the 829b has 30 watts of plate dissipation per plate compared to just 20 watts for the 5894
3. the plate pins are thicker on the 5894 than with the 829b....

some are of the opinion that these two tubes are interchangeable, this maybe
but i caution you that plate caps once used in the 5894 will not be usable for the 829b anymore
as it would have become loose...

after rewiring...

power draw is around 110 watts, very similar to the 7403....
operating point is 300volts plate at 80mA cathode, for about 12 watts per plate...
this is way below the 40 watt limit for this tube...

in the dark....

tony · « **Reply #303 on:** Feb 17, 2015 at 07:20 PM »

beware of fakes....fakes tubes are everywhere....another reason why i like teeve toobs.....
www.jacmusic.com/nos/images/Fakes/index.htm

CoolTOYZPH · « **Reply #304 on:** Feb 17, 2015 at 07:30 PM »

Link is for thick film technology. Please educate us on how this is related to fake tubes.
Thank You.

Quote from: tony on Feb 17, 2015 at 07:20 PM

beware of fakes....fakes tubes are everywhere....another reason why i like teeve toobs.....
https://www.google.com.ph/search?q=thick+film+technology&oq=thick+film+technology&aqs=chrome..69i57&sourceid=chrome&es_sm=93&ie=UTF-8

tony · « **Reply #305 on:** Feb 18, 2015 at 06:29 AM »

sorry, corrected link...

tony · « **Reply #306 on:** Feb 18, 2015 at 04:54 PM »

many years ago, i participated in a group buy at diyaudio,
i spent U$240, lost to a guy from Indonesia...those were for 10 pcs each of Toshiba
p and n type dual jfets...when the goods arrived, they were relabeled npn and pnp dual bjt's instead.
never got my money back, i still have those fakes with me as a reminder...

tony · « **Reply #307 on:** Feb 21, 2015 at 11:57 AM »

5894 SET cum 6GU7/6RHH2 Aikido...

built using the Russian 6H8C, 6SN7 equivalent...
circuit is a Broskie CCDA implementation using 47k plate/cathode resistors,
and 820 ohm 1st cathode bias resistor..
the 5Z4 rectifier tube was harvested from a Sakura AV200 hybrid amp....

side view,,,

tony · « **Reply #308 on:** Feb 27, 2015 at 05:11 PM »

Norah Jones sounds very sweet playing these combination...

tetablanco · « **Reply #309 on:** Mar 23, 2015 at 06:02 AM »

Tony: Only after reading through all pages of this thread did I come to understand your frustrations in having your babies wind up in the hands of a roller who does not truly appreciate the time, effort, dedication, and ingenuity that you pour into each. Looking forward to coming over and listening to your works of technological art real soon. Thanks.

tony · « **Reply #310 on:** Mar 23, 2015 at 08:21 AM »

Quote from: tetablanco on Mar 23, 2015 at 06:02 AM

Tony: Only after reading through all pages of this thread did I come to understand your frustrations in having your babies wind up in the hands of a roller who does not truly appreciate the time, effort, dedication, and ingenuity that you pour into each. Looking forward to coming over and listening to your works of technological art real soon. Thanks.

i am a tubehead, tube electronics are my passion, i make tube amps as a hobby, not as a way to earn a living...
i do not sell tubes as a rule, but for fellow diy'ers i do a swapping deal mostly..
if i sell my amps, it is only for the purpose of rolling funds so i can make another amp...
in other forums i contribute what i can to help younger people make their own tube amps,
and thus send them to their own tube journey....
i am busy at FB on several forums and at diyaudio.com, one of two Pinoys honored to wear a mod hat..

i am also into tube rolling, but not the kind that many who do not make their own amps do...

tetablanco · « **Reply #311 on:** Mar 23, 2015 at 12:25 PM »

Quote from: tony on Mar 23, 2015 at 08:21 AM

i am a tubehead, tube electronics are my passion, i make tube amps as a hobby, not as a way to earn a living...
i do not sell tubes as a rule, but for fellow diy'ers i do a swapping deal mostly..
if i sell my amps, it is only for the purpose of rolling funds so i can make another amp...
in other forums i contribute what i can to help younger people make their own tube amps,
and thus send them to their own tube journey....
i am busy at FB on several forums and at diyaudio.com, one of two Pinoys honored to wear a mod hat..

i am also into tube rolling, but not the kind that many who do not make their own amps do...

tony · « **Reply #312 on:** Mar 23, 2015 at 06:48 PM »

my new set of tubes, Russian GU-50, with china sockets and power transformer
to make a pp power amp....thanks to my FB friends for the help in acquiring these items...
will design the OPT for use in this amp, B+ at around 700volts....

kayee · « **Reply #313 on:** Mar 24, 2015 at 05:08 PM »

sir tony picture pag buo mo na itong GU50 na amp....

tony · « **Reply #314 on:** Mar 24, 2015 at 06:33 PM »

Quote from: kayee on Mar 24, 2015 at 05:08 PM

sir tony picture pag buo mo na itong GU50 na amp....

sure thing...

kamusta na nga pala yung GU50 set mo? nasimulan mo na ba?

kayee · « **Reply #315 on:** Mar 25, 2015 at 10:17 AM »

di pa rin sir but complete na yung power trafo and opt ko mag source pa ako ng maayos na capacitor may kulang pa ako....last 3 weeks ago ko lang nabuo yung 6lu8 ko may konting issue pa sa hum

hirap hanapin kung saan galing yung hum sir parang pancit kasi yung wiring ko...

di ko pa naayos but sa sq ganda sir parang naka push pull na rin ako....

remington · « **Reply #316 on:** Mar 25, 2015 at 10:30 AM »

Quote from: kayee on Mar 25, 2015 at 10:17 AM

di pa rin sir but complete na yung power trafo and opt ko mag source pa ako ng maayos na capacitor may kulang pa ako....last 3 weeks ago ko lang nabuo yung 6lu8 ko may konting issue pa sa hum hirap hanapin kung saan galing yung hum sir parang pancit kasi yung wiring ko... di ko pa naayos but sa sq ganda sir parang naka push pull na rin ako....

dami mong niluluto ngayon bro! kamusta yung classic mo?

tony · « **Reply #317 on:** Mar 25, 2015 at 11:27 AM »

Quote from: kayee on Mar 25, 2015 at 10:17 AM

di pa rin sir but complete na yung power trafo and opt ko mag source pa ako ng maayos na capacitor may kulang pa ako....last 3 weeks ago ko lang nabuo yung 6lu8 ko may konting issue pa sa hum hirap hanapin kung saan galing yung hum sir parang pancit kasi yung wiring ko... di ko pa naayos but sa sq ganda sir parang naka push pull na rin ako....

gumamit ka ng ground lifter?
pm mo ko kung anong parts ang need mo malamang meron ako nyan...

you are welcome to my parts bin....

kayee · « **Reply #318 on:** Mar 27, 2015 at 07:16 AM »

Quote from: remington on Mar 25, 2015 at 10:30 AM

dami mong niluluto ngayon bro! kamusta yung classic mo?

ok na bro naayos ni benidict yung speaker ko...

di na ako kumuha kay david ng replacement mahal yung cost ng shipping....isa na lang yung project ko GU50 na lang then stop muna...hehehehe saka na mag upgrade uli.

kayee · « **Reply #319 on:** Mar 27, 2015 at 07:22 AM »

Quote from: tony on Mar 25, 2015 at 11:27 AM

gumamit ka ng ground lifter?
pm mo ko kung anong parts ang need mo malamang meron ako nyan...
you are welcome to my parts bin....

sir tony yung ground lifter ba di delikado and kailangan pa ata ng switch for the ground lifter..may nakuha na ako na schematic try ko sir tony yung advice mo...

. cge sir pm kita sa need ko na capacitor...yung chassis muna gawin ko for the meantime...may excess pa ako na tube sa bahay na di ko na gagamitin di ko lang alam yung type ng tube baka magamit mo ito sa ibang project mo sir russian tube din kasabay ng gu50....thanks

remington · « **Reply #320 on:** Mar 27, 2015 at 12:01 PM »

Quote from: kayee on Mar 27, 2015 at 07:16 AM

ok na bro naayos ni benidict yung speaker ko... di na ako kumuha kay david ng replacement mahal yung cost ng shipping....isa na lang yung project ko GU50 na lang then stop muna...hehehehe saka na mag upgrade uli.

buti naman at naayos ang AN! hindi ba nagbago SQ? sarap sana pakinggan mga builds mo ang layo lang hehehe. kay master tony ko nalang papakinggan GU50

tony · « **Reply #321 on:** Mar 27, 2015 at 12:08 PM »

Quote from: remington on Mar 27, 2015 at 12:01 PM

buti naman at naayos ang AN! hindi ba nagbago SQ? sarap sana pakinggan mga builds mo ang layo lang hehehe. kay master tony ko nalang papakinggan GU50

single ended yung kay kayee, pushpull yung sa akin.....

tony · « **Reply #322 on:** Mar 28, 2015 at 05:56 PM »

the shape of things to come....two rows on the left are OPT's, the rest are power traffos and chokes for upcoming projects...

geriboy · « **Reply #323 on:** Mar 28, 2015 at 05:59 PM »

Ang laki nung nasa pinaka-kanan

tony · « **Reply #324 on:** Mar 28, 2015 at 06:07 PM »

yes, doc, that is for a 4D32 push-pull amp that can do 120 watts per channel.... inch center leg and stacked 3.25 inches and wieghs in at 1kgs...

tony · « **Reply #325 on:** Apr 06, 2015 at 09:46 AM »

Easter MOD line amp....another Broskie CCDA line amp, this time using the 4KN8 twin triode tube....
this is a dual mono line amp, the channels each run on their own power supply
completely independent of the other...this is a prototype preamp, not for sale....
btw, this is not an AIKIDO preamp, many of those who bought the little preamp
like the sound of it more than the Aikido, so i made another version, this time
upping it one notch higher....i have at lest 5 notches still running in my head...

remington · « **Reply #326 on:** Apr 06, 2015 at 10:42 AM »

nice master!!! sana maka punta ulit dyan sa inyo para mapakinggan bagong recipe!!!

tony · « **Reply #327 on:** Apr 06, 2015 at 11:21 AM »

yes Jun, all are welcome to have a listen, me parating na Malabon boys sa house...

tony · « **Reply #328 on:** Apr 06, 2015 at 11:53 AM »

paired with a 5894 SET...

tony · « **Reply #329 on:** Apr 09, 2015 at 02:04 PM »

btw, these are the litle amps that was the predecessor to the Easter MOD line amp...