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PostPosted: Fri Aug 06, 2004 12:03 pm
by arnoldc
go to the architectural audio forum for audience hook-up wire inquiries

PostPosted: Fri Aug 06, 2004 6:38 pm
by red76
about 1.5mV hum with balanced filament supply (no hum balance pot).


Hi Arnie,

I actually saw that amp at the diy room kitchen (audio fair)... Sayang i didn't get to hear it. Anyways, are the balanced filament chokes you used the custom types made by the Tono winder? I remember Prof JM talking about the winding method used for the custom filament chokes for the orig TB2A3 I just don't remember the layman's explanation on how it was wound... Have you tried adding quality hum pots to reduce the hum even more even if the hum is already at acceptable at 1.5mV? Thanks.

PostPosted: Sun Aug 08, 2004 11:07 am
by arnoldc
red, i don't use filament chokes, we never did. filament supply comes from 1.25-0-1.25V AC. i do have those expensive TDO 50W hum balance pots, but di na bale, sayang lang. papangit pa chassis ko at layout.

abangan mo 300B ko, it will be quite different from the past stuff i made. my own brew din.

Re: Hanep

PostPosted: Sun Aug 08, 2004 7:33 pm
by zetroce
Mr. Plumber wrote::) ArnoldC,
Hanep sa GANDA. Labor of Love obviously. Kinis!
mp


MP,

Hindi mo pa nakita ang pang-ilalim niyan. Tumulo laway ko nang makita ko kung paano pinaghirapan ni Arnold yan. Ika nga sa kotse, nikelado pati tambutso at oil pan. :twisted:

Arnold,

Di ba for sale yan? Binawi mo na ba? :wink:

Cheers! 8)

PostPosted: Mon Aug 09, 2004 8:13 am
by arnoldc
zetroce, napag isip-isip ko talo ako kung ibenta ko, kaya di bale na lang :D

PostPosted: Mon Aug 09, 2004 10:13 pm
by rsm2a3
Post din ako bago mag expire yung free pix hosting...

My 2A3/45 amp with 6sn7 input/driver tube. James PWR, Tango OPT and choke.

Image Image


TB2A3 stock circuit and parts.

Image Image

PostPosted: Mon Aug 09, 2004 10:56 pm
by zetroce
rsm2a3 wrote:Post din ako bago mag expire yung free pix hosting...

My 2A3/45 amp with 6sn7 input/driver tube. James PWR, Tango OPT and choke.

Image Image


TB2A3 stock circuit and parts.

Image Image


Ronnie,

Ganda talaga ng 2a3/45!

Puede bang pagawa ng 300B?? :twisted:

OT, ready na ba tayong mag-listening session diyan??? Nabulabog mo na ba ang Singapore based Pinoydiophiles?

Cheers! 8)

PostPosted: Tue Aug 10, 2004 1:55 pm
by red76
arnoldc wrote:red, i don't use filament chokes, we never did. filament supply comes from 1.25-0-1.25V AC. i do have those expensive TDO 50W hum balance pots, but di na bale, sayang lang. papangit pa chassis ko at layout.

abangan mo 300B ko, it will be quite different from the past stuff i made. my own brew din.


Thanks Arnie for clarifying, yung balanced winding pala sa pwr trafo (HT taps).

I'd be looking forward in hearing your 300B PP project. :)

PostPosted: Tue Aug 10, 2004 2:10 pm
by arnoldc
red76, it's different from what i've made before, because it's fixed bias, SS rectified for the filaments, and has voltage regulator tubes for the driver stage. pentode driver too :)

PostPosted: Tue Aug 10, 2004 2:36 pm
by red76
Hi Arnie,

Merong scheme na tinatawag nilang "semi-fixed bias".. Pero di ko alam advantage yung trick biasing arrangement yun. Just kinda skimmed on it sa ibang forum, diyaduio.com ata. Schottkys sa filaments? Ok yan. Hmm.. Early WE pentodes yan no? :) Hanep, fully tube regulated driverstage pa. PS filtering scheme nya hybrid, pure tube, or ss?

PostPosted: Tue Aug 10, 2004 3:05 pm
by arnoldc
yes, Western Electric 404A

PS filter is C double LC tube rectified

filament is SS rectified

driver stage is tube regulated

:D

PostPosted: Wed Aug 11, 2004 3:13 pm
by red76
arnoldc wrote:yes, Western Electric 404A

PS filter is C double LC tube rectified

filament is SS rectified

driver stage is tube regulated

:D


Okay yan! Okay yan! :D

PostPosted: Wed Oct 06, 2004 12:08 pm
by dogears
The DEDACT2 box :D
Image

baka meron ding iba diyan gusto magpost ng kanilang PASSIVE linestage :lol:

PostPosted: Wed Oct 06, 2004 12:11 pm
by Racio
dogears wrote:The DEDACT2 box :D
Image

baka meron ding iba diyan gusto magpost ng kanilang PASSIVE linestage :lol:

NICE!!! I particularly like your stickaroo there pare! hehe. Saan mo pinasadya yan?

PostPosted: Wed Oct 06, 2004 12:14 pm
by dogears
Hehe. Thanks. Sa festival mall. P30 lang yan! :lol:

PostPosted: Wed Oct 06, 2004 12:40 pm
by arnoldc
ganda!! ganda ng sticker!

he he. pare may HDCD ba yan?

PostPosted: Wed Oct 06, 2004 12:44 pm
by Killer Mike
hanep sa DacT! :o :D

PostPosted: Wed Oct 06, 2004 12:47 pm
by arnoldc
pre, joke lang. ang laman nyan ay DACT (Danish Audio ConnecT) na pot. biro lang po yung HDCD.

PostPosted: Wed Oct 06, 2004 12:58 pm
by dogears
teka teka, DACT CT2 stepped attenuator lang po ang nasa loob nyan, hindi pa yan yung DAC :D

PostPosted: Sat Oct 09, 2004 9:06 am
by BonD
Nice Box :)

anong kahoy yan?