Author Topic: Wiredstate Projects (Read 125128 times)

arnoldc · « **Reply #1050 on:** Jun 30, 2004 at 03:51 PM »

tuff, DC heating improves (lessens) hum levels. on some amps using 45, or 2A3, we don't bother with DC heating because the hum level is just 3mV-4mV (my 2A3 is 4mV). my 45 even when connected to high efficiency single driver speakers is dead silent. however, AC heating on 300Bs is a different story. my first incarnation is about 12 mV, i plan to use DC heating on my next version. there are noisy tubes, there are silent tubes.

on preamps, where we amplify millivolts, specially phono stages, DC heating is a must.

tuff_u_gong · « **Reply #1051 on:** Jun 30, 2004 at 04:24 PM »

Quote from: arnoldc on Jun 30, 2004 at 03:51 PM

tuff, DC heating improves (lessens) hum levels. on some amps using 45, or 2A3, we don't bother with DC heating because the hum level is just 3mV-4mV (my 2A3 is 4mV). my 45 even when connected to high efficiency single driver speakers is dead silent. however, AC heating on 300Bs is a different story. my first incarnation is about 12 mV, i plan to use DC heating on my next version. there are noisy tubes, there are silent tubes.

on preamps, where we amplify millivolts, specially phono stages, DC heating is a must.

oK thanks sir. wala bang cons ang DC heating sir? why do others still prefer AC heating for their 300b amps?

arnoldc · « **Reply #1052 on:** Jun 30, 2004 at 07:02 PM »

tuff, ac heating is simplest, cheapest to implement. sonically, some swear ac heating is the best. but then again, it's their ears, not mine.

tuff_u_gong · « **Reply #1053 on:** Jul 01, 2004 at 01:57 PM »

Quote from: arnoldc on Jun 30, 2004 at 07:02 PM

tuff, ac heating is simplest, cheapest to implement. sonically, some swear ac heating is the best. but then again, it's their ears, not mine.

what you're saying then is you find DC heating more quiet and easier to manage without sacrificing sonic quality.

TY sir!

arnoldc · « **Reply #1054 on:** Jul 01, 2004 at 02:08 PM »

tuff, no i didn't say that. what i'm saying is that DC reduces hum level significatly on some tubes, albeit more expensive (extra parts needed).

i have not made judgement sonically.

tuff_u_gong · « **Reply #1055 on:** Jul 02, 2004 at 06:12 AM »

Quote from: arnoldc on Jul 01, 2004 at 02:08 PM

tuff, no i didn't say that. what i'm saying is that DC reduces hum level significatly on some tubes, albeit more expensive (extra parts needed).

i have not made judgement sonically.

fair enough arnoldc. am actually very happy with my DC-heated 300B amp

JojoD818 · « **Reply #1056 on:** Jul 02, 2004 at 08:58 AM »

master arnoldc,

I see you now use DC for heaters, helps a lot in the hum department doesn't it?

regards,
JojoD

arnoldc · « **Reply #1057 on:** Jul 02, 2004 at 10:56 AM »

jojo, nope. not my amps yet. even my foreplay is ac heated dead silent

but, i will consider that for my next preamp which is a 56 tube

JojoD818 · « **Reply #1058 on:** Jul 02, 2004 at 12:59 PM »

Quote from: arnoldc on Jun 30, 2004 at 03:51 PM

tuff, DC heating improves (lessens) hum levels. on some amps using 45, or 2A3, we don't bother with DC heating because the hum level is just 3mV-4mV (my 2A3 is 4mV). my 45 even when connected to high efficiency single driver speakers is dead silent. however, AC heating on 300Bs is a different story. my first incarnation is about 12 mV, i plan to use DC heating on my next version. there are noisy tubes, there are silent tubes.

on preamps, where we amplify millivolts, specially phono stages, DC heating is a must.

i meant this post.

I agree on the noisy tubes and the silent tubes part.

as always, there is the "audiophile" debate between AC or DC heating... thankfully I'm past that portion already, time to learn other things about tubes though.

rossifumi46 · « **Reply #1059 on:** Jul 02, 2004 at 06:17 PM »

Quote from: arnoldc on Jul 02, 2004 at 10:56 AM

jojo, nope. not my amps yet. even my foreplay is ac heated dead silent

but, i will consider that for my next preamp which is a 56 tube

OT
buti pa si master arnold every month may bagong amp!!

at malapit na din pala bagong speaker!

ako rin gusto ko marami toys! pero ayaw na ng bulsa ko! hehehe

ambel · « **Reply #1060 on:** Jul 12, 2004 at 11:39 PM »

If you like a quite 300B SE amp converiting the filament heaters to DC voltage but definetely there would
be a change in sound character. It depends on your taste this is basically subjective but for me i would go for the purist approach AC heaters there something about AC heating some my call musicality versus the sterile
sound of DC this is my opinion take it with a grain of salt. It's up to you to decide.
AC heated 300B SE amp hums but you need to be careful in implementing the grounding. my experience is basically the shortest grounding path with the input and power ground tied together.I stay away from the
bus bar type grounding and also a no feedback type of input/driver would surely help i also increase the value
hum resistor to 135 ohm.

FASTBACK · « **Reply #1061 on:** Jul 14, 2004 at 01:14 AM »

Quote from: ambel on Jul 12, 2004 at 11:39 PM

If you like a quite 300B SE amp converiting the filament heaters to DC voltage but definetely there would
be a change in sound character. It depends on your taste this is basically subjective but for me i would go for the purist approach AC heaters there something about AC heating some my call musicality versus the sterile
sound of DC this is my opinion take it with a grain of salt. It's up to you to decide.
AC heated 300B SE amp hums but you need to be careful in implementing the grounding. my experience is basically the shortest grounding path with the input and power ground tied together.I stay away from the
bus bar type grounding and also a no feedback type of input/driver would surely help i also increase the value
hum resistor to 135 ohm.

OT

ambel

Finally you've come out in the open this time, not on a lurker mode anymore?

vintage_dog · « **Reply #1062 on:** Oct 07, 2004 at 05:50 PM »

Citibank Credit Card and wiredstate.com cordially invite you to experience recorded music at its finest. For the first time feel the emotions beneath the recording format with some of the world’s best High End audio equipment. Join us at the “November HiFi Show” at the Mandarin Oriental Hotel on November 6 and 7 between 10:00am to 9:00pm. On show will be 21 dealers representing various foreign Hi-end equipment, vintage audio, Pinoy DIY, and record vinyl dealers. Also performing live will be the jazz funk band “Radioactive Sago Project”. This event is exclusively for all Citibank Card holders and wiredstate.com members.

yukon · « **Reply #1063 on:** Oct 08, 2004 at 11:48 AM »

yahoo!!!
more power to wiredstate.

levi · « **Reply #1064 on:** Oct 21, 2004 at 07:30 PM »

I just got my modded 300B from Rene and it has really improved. I highly recommend it to Tono 300B owners. I even added a little to have the resistors upgraded to riken.

JojoD818 · « **Reply #1065 on:** Oct 21, 2004 at 07:38 PM »

Quote from: levi on Oct 21, 2004 at 07:30 PM

I just got my modded 300B from Rene and it has really improved. I highly recommend it to Tono 300B owners. I even added a little to have the resistors upgraded to riken.

sir levi,

hope someday sa session madinig ko yan 300B mo.

it may be too soon to ask for a review pero congrats on your amp!

levi · « **Reply #1066 on:** Oct 21, 2004 at 07:45 PM »

You should hear it with my new preamp.

vintage_dog · « **Reply #1067 on:** Oct 21, 2004 at 08:14 PM »

Exhibitors:

AVDI
Hyper Audio
Sound & Images
Listening in Style
Pinoy DIYers
Wiredstate
Home Theatre/DCM
Hifi Plus
Audio Den
Opera Audio
Apple Computer & I-Pod
Mang Johnny Cruz
Architectural Audio
Audio Amplified
Montage & Fully Booked
Ambel Audio
NASA
Upscale Audio
Phasetron
Audio Research
Toyama Enterprise (B&W Speakers)
D-Exchange

vintage_dog · « **Reply #1068 on:** Oct 21, 2004 at 08:16 PM »

Quote from: detubo

tentatively this is whats going on;

Saturday:

10 am - Ribbon cutting. guest of honor maestro Eugene Castillo
2:30 pm - percussion performance by mark escueta of rivermaya, paul zialcita of spy, zach form imago
4:15 pm - waji wara (jazz band ala Cal Tjader)
6:00 pm - radioactive sago project (jazz funk and spoken word. this years winner of MTV's most stylish video. their witty hit song sometimes back was "baboy" about politics & corruption. i heard their new album. is it any good? well, i bought the album. may horn section to bro!

right now things are still very fluid so expects changes as we approach D-day. i'll try to arrange special audiophile specific activities too like different super cartridges on demo for sunday (maybe a Dynavector XV-1s, Koetsu Onyx platyinum and Clearaudio insider Reference)

pm me if you have any suggestion or you would like to volunteer for any activity.

mcbry · « **Reply #1069 on:** Oct 21, 2004 at 08:40 PM »

two more weeks to go

vintage_dog · « **Reply #1070 on:** Oct 21, 2004 at 08:50 PM »

Admission absolutely free for:

1. All Citibank card holders
2. Wiredstate members (register at www.wiredstate.com)

JojoD818 · « **Reply #1071 on:** Oct 21, 2004 at 09:07 PM »

Quote from: levi on Oct 21, 2004 at 07:45 PM

You should hear it with my new preamp.

wowow! ano bago mo preamp sir?

levi · « **Reply #1072 on:** Oct 21, 2004 at 09:42 PM »

Old model na CJ. matches well with the tono 300B. Attend ako sa audio fair baka may mahanap pa na mabili.

JojoD818 · « **Reply #1073 on:** Oct 21, 2004 at 09:47 PM »

Quote from: levi on Oct 21, 2004 at 09:42 PM

Old model na CJ. matches well with the tono 300B. Attend ako sa audio fair baka may mahanap pa na mabili.

must hear nga yan

see you there!

levi · « **Reply #1074 on:** Oct 21, 2004 at 10:00 PM »

Medyo OT na tayo but I will invite you guys next time. I want to compare also the Tono with other amps baka mali mali na mga kalokohan kong pinagbibili. hehehe

JojoD818 · « **Reply #1075 on:** Oct 22, 2004 at 01:08 AM »

Quote from: levi on Oct 21, 2004 at 10:00 PM

Medyo OT na tayo but I will invite you guys next time. I want to compare also the Tono with other amps baka mali mali na mga kalokohan kong pinagbibili. hehehe

ok naman sir yun kinalolokohan natin, mga audio gears and related stuff.

vintage_dog · « **Reply #1076 on:** Oct 22, 2004 at 10:39 AM »

for any info on the forthcoming Hifi Show, please go to:

http://www.wiredstate.com/forum/viewforum.php?f=55

mcbry · « **Reply #1077 on:** Oct 22, 2004 at 01:32 PM »

sir,

i'm just wondering, will there be a 0% interest promo for citibank during the hifi show?

thanks,

levi · « **Reply #1078 on:** Nov 05, 2004 at 02:44 AM »

Check out the new Tono products. Attend the Audio fair.

vintage_dog · « **Reply #1079 on:** Nov 05, 2004 at 08:02 AM »