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Post by southpeak on Jan 27, 2005 15:41:50 GMT 7
have jumped the band wagon and joined the tube world by getting my system a vintage Eico ST70. apologies to our diehard SS members but this particular unit showed the weaknesses of my SS units including the Hafler XL280. i love this amp . details, soundstage, mataba, malapad, etc.. (my ears ;D ) the unit i got is so vintage it was already converted to power amp only. ergo, some of the tubes are already missing particularly the rectifier tube (please see pics). i have already replaced the power tubes by a quad match JJTesla 6L6GC. i read in one primer that the rectifier tube converts AC current to pulsating DC current which is then smoothed out to reduce hum. i've already brought the unit to "watt hifi" in MCS to be tested and replaced the old, chapsuey power tubes. the hum was reduced somehow but still, meron pa. is this normal? btw, we matched it with the VTL preamp + meadowlarks or B&W CDM1 NT. ;D ;D ;D. you ask elmo. he wanted to buy the unit going back to my question: 1. how important is the rectifier tube? 2. do i still need to install one? 3. what are the effects (short or long term) i might encounter if i don't install one? 4. will it reduce the hum i hear from the speakers? your views please.
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Post by audioslave on Jan 27, 2005 15:51:07 GMT 7
dapat sir key hyperaudio mo dalhin yan. you can ask all the guys here and they're in unison in saying that the guy is a specialist when it comes to tube amp upgrades, modification or restoration.
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Post by kimpao on Jan 27, 2005 16:18:04 GMT 7
have jumped the band wagon and joined the tube world by getting my system a vintage Eico ST70. apologies to our diehard SS members but this particular unit showed the weaknesses of my SS units including the Hafler XL280. i love this amp . details, soundstage, mataba, malapad, etc.. (my ears ;D ) the unit i got is so vintage it was already converted to power amp only. ergo, some of the tubes are already missing particularly the rectifier tube (please see pics). i have already replaced the power tubes by a quad match JJTesla 6L6GC. i read in one primer that the rectifier tube converts AC current to pulsating DC current which is then smoothed out to reduce hum. i've already brought the unit to "watt hifi" in MCS to be tested and replaced the old, chapsuey power tubes. the hum was reduced somehow but still, meron pa. is this normal? btw, we matched it with the VTL preamp + meadowlarks or B&W CDM1 NT. ;D ;D ;D. you ask elmo. he wanted to buy the unit IMHO, i'll have it fixed by no other than the man himself sir rene aka hyperaudio. what you have right now is one "hell" of an amp. Have it fully restored to its original state . based on what you posted, you still haven't heard the true sound of this amp. south, i'll try to answer your queries in relation to what you posted. but let me remind you am not an expert on tubes. so, here goes. 1. how important is the rectifier tube? was there a rectifier tube when you tested the unit? if none, then recification was also converted to solid state. sayang yung amp 2. do i still need to install one? if it works without the rectifier then this is ss,right? then you won't need one, not unless if you want to restore the amp to its original state. 3. what are the effects (short or long term) i might encounter if i don't install one? again if its converted to solidstate, none. if its' still tube rectified, hindi mo siya magagamit. 4. will it reduce the hum i hear from the speakers? the hum that you hear might be comming from the effects of the conversion or internal parts that might already need replacement. give rene/hyperaudio a call (Tel. # 8325710). great person to talk to, especially in restoring vintage tube amps.
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Post by southpeak on Jan 27, 2005 17:32:39 GMT 7
sir kimpao, thank you very much for your feedback. will call master rene as soon as i get the "courage" to do so and ask how much this particular project might cost. . meron ba syang free consultation over the net? ;D special thanks to master hans. kayo ho ang may sala kung bakit ako ngayon narito. love those tubes love the sound even better. again thank you for guiding me to "the path of least resistance"
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Post by kimpao on Jan 27, 2005 17:40:29 GMT 7
sir kimpao, thank you very much for your feedback. will call master rene as soon as i get the "courage" to do so and ask how much this particular project might cost. . meron ba syang free consultation over the net? ;D chief, i would advise you to call him. its much better. regarding costs, hmmm..... let the master do the estimates. ;D libre consultation dun. ok kausap yan si master rene. special thanks to master hans. kayo ho ang may sala kung bakit ako ngayon narito. love those tubes love the sound even better. again thank you for guiding me to "the path of least resistance" nakows!!!!.... sir, huwag ka masyadong nagdididikit diyan kay KOya Hans! SARS ang aabutin mo diyan! ;D ;D ;D KOya, fish po tayo!!!........... ;D ;D ;D
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Post by rony on Jan 27, 2005 18:00:37 GMT 7
hey southpeak nakita ko taga san pedro laguna ka. dyan ka ba mismo sa southpeak subd. nakatira? Anyway maganda sir yan eico ST70, heard that several times at rene's place. kaya lang ang original design niyan e meron gz34 at ang output tubes eh 7591 yours is 6l6? Dapat sir i pa confine mo yan ke master rene para ma restore at maibalik yun original na sound. Yun amps ko na vintage siya lang ang nag restore noon.
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Post by Superman on Jan 27, 2005 18:08:00 GMT 7
congrats, southpeak on your new amp!...are you from the south?? hope we can hear your set-up soon...thanks! ;D
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Post by hans adriane on Jan 27, 2005 18:17:21 GMT 7
sir kimpao, thank you very much for your feedback. will call master rene as soon as i get the "courage" to do so and ask how much this particular project might cost. . meron ba syang free consultation over the net? ;D special thanks to master hans. kayo ho ang may sala kung bakit ako ngayon narito. love those tubes love the sound even better. again thank you for guiding me to "the path of least resistance" Hahahahaha talaga ganyan... As pero advise ng masta... Si Master Hyperaudio bahala dyan.. ikaw bahala sa gastos! ;D ;D Pero worth every cents naman pagnatapos and restored to it Original state.. Tapos benta mo 20k sa akin hehehehhee Si masta rony Eico boy yan... HF-81 & HF-87..
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Post by southpeak on Jan 27, 2005 20:26:38 GMT 7
sirs rony, superman, yes i'm residing in southpeak. phase II, san pedro laguna. both of you leave near by? yup, 6L6GC. i tried to look for a quad match 7591 but no luck. as i got the the unit with chapsuey 6L6 on them, i assumed they will do for now. as with the GZ34, it will have to wait for the restoration. as sir kimpao mentioned, its running with out the tube rectifier so its already ss rectified? no use for the tube just right now. i'm still amazed by this amp. power consumption starts at 150w? my hafler eats what, 300-450w just sitting there? power on of course. ;D but i have to say, they still sound far more better than my SS gears with all these off specs changes ;D i can only imagine how it would sound like fully restored si masta hans, idol ko nayan kahit di pa kami nagkikita ng personal. preho kami floor stander nyan eh...
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Post by rony on Jan 27, 2005 21:01:45 GMT 7
southpeak taga phase 1 ako. hehehe kaya lang ala pa nakatayong house maybe in a couple of more years pa. kapitbahay mo lang halos si iceman. Pag nagkaroon ka ng budget iparestore mo sana yan sa original state magugulat ka sa tunog niyan at lalo ka niyan mahihilig sa tubo. pwede estimate ke rene dalhin mo lang unit para makita niya
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Post by audioslave on Jan 27, 2005 21:26:05 GMT 7
i looked up my Tube Data Sheet Locator and found out that your 6L6GC is not an exact replacement or substitute of the 7591. they have different ratings and performance. though they are both octal based, the 7591 has a higher plate voltage and perhaps that's the reason why no untoward incident happened to your amp. ;D ;D
tama si mater rony, bitin yan pag 6L6GCs ang power tubes na nakasalpak dyan. short by 50v yung plate voltage nyan kaya hamak na mas maganda pa tumunog yan kung yung orig na tubes ang gagamitin mo. ;D
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Post by Superman on Jan 27, 2005 21:54:08 GMT 7
sirs rony, superman, yes i'm residing in southpeak. phase II, san pedro laguna. both of you leave near by? yup, 6L6GC. i tried to look for a quad match 7591 but no luck. as i got the the unit with chapsuey 6L6 on them, i assumed they will do for now. as with the GZ34, it will have to wait for the restoration. as sir kimpao mentioned, its running with out the tube rectifier so its already ss rectified? no use for the tube just right now. i'm still amazed by this amp. power consumption starts at 150w? my hafler eats what, 300-450w just sitting there? power on of course. ;D but i have to say, they still sound far more better than my SS gears with all these off specs changes ;D i can only imagine how it would sound like fully restored si masta hans, idol ko nayan kahit di pa kami nagkikita ng personal. preho kami floor stander nyan eh... yes, i'm from the south as well...good to know that you're into audio...parinig minsan ha
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Post by iceman90a on Jan 27, 2005 22:00:18 GMT 7
southpeak taga phase 1 ako. hehehe kaya lang ala pa nakatayong house maybe in a couple of more years pa. kapitbahay mo lang halos si iceman. Pag nagkaroon ka ng budget iparestore mo sana yan sa original state magugulat ka sa tunog niyan at lalo ka niyan mahihilig sa tubo. pwede estimate ke rene dalhin mo lang unit para makita niya hey southpeak - taga la marea lang ako, si conspicuous din. daan ka minsan sa amin
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Post by southpeak on Jan 28, 2005 16:33:03 GMT 7
southpeak taga phase 1 ako. hehehe kaya lang ala pa nakatayong house maybe in a couple of more years pa. kapitbahay mo lang halos si iceman. Pag nagkaroon ka ng budget iparestore mo sana yan sa original state magugulat ka sa tunog niyan at lalo ka niyan mahihilig sa tubo. pwede estimate ke rene dalhin mo lang unit para makita niya sir rony, if you are planning to construct your house na, give me a sign. i can connect you with the contractor who did my house. he's residing in phase I. para no hasle sa mga permit, permit.. thanks for the advise sir. will do that as soon as i'm able.
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Post by southpeak on Jan 28, 2005 16:47:42 GMT 7
i looked up my Tube Data Sheet Locator and found out that your 6L6GC is not an exact replacement or substitute of the 7591. they have different ratings and performance. though they are both octal based, the 7591 has a higher plate voltage and perhaps that's the reason why no untoward incident happened to your amp. ;D ;D tama si mater rony, bitin yan pag 6L6GCs ang power tubes na nakasalpak dyan. short by 50v yung plate voltage nyan kaya hamak na mas maganda pa tumunog yan kung yung orig na tubes ang gagamitin mo. ;D oopps, buti nalang lower rating. pride eico st70 na sana meron ako now i'm really thingking. " hamak na mas maganda" pa tumonog kung orig tube? i'm new sir, but as i mentioned before, it sounds better than my other gears already. gaganda pa? hmmmm... magkano kaya pa restore ;D
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Post by southpeak on Jan 28, 2005 16:57:18 GMT 7
yes, i'm from the south as well...good to know that you're into audio...parinig minsan ha sir clark kent (superman), nice to know may kapitbahay kami na superhero who is also into audio . yes sir, anytime we are in the same time zone. sana maparestore ko muna bago nyo marinig ;D or maybe you can use your super ear to hear my gear from your place .. joke lang sir..
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Post by southpeak on Jan 28, 2005 17:09:04 GMT 7
hey southpeak - taga la marea lang ako, si conspicuous din. daan ka minsan sa amin sir iceman, i'm not sure if you can recall. you were selling your tono pre amp last year. i inquired and mentioned i was from southpeak. i was suppose to audition and you gave me instruction to go to your house pero di natuloy kasi i was called by my office for an emergency. anyways, thanks for the invitation sir. balita ko from masta hans may niluluto atang gig sa inyo. will love to join, schedule permitting.. thanks again
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Post by Superman on Jan 28, 2005 17:16:00 GMT 7
sir clark kent (superman), nice to know may kapitbahay kami na superhero who is also into audio . yes sir, anytime we are in the same time zone. sana maparestore ko muna bago nyo marinig ;D or maybe you can use your super ear to hear my gear from your place .. joke lang sir.. hey, no problem, hehehe!...let us know, bro...thanks!
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Post by southpeak on Jan 28, 2005 17:34:20 GMT 7
Si masta rony Eico boy yan... HF-81 & HF-87..[/quote] sir rony, i have a question regarding voltage requirement. the ST 70 calls for 117 volts, i only have the standard 110 volt stepdown transformer/ AutoVolt regulator combination. will there be a problem? do you're Eicos' also require 117v?
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Post by hans adriane on Jan 28, 2005 19:39:55 GMT 7
oopps, buti nalang lower rating. pride eico st70 na sana meron ako now i'm really thingking. " hamak na mas maganda" pa tumonog kung orig tube? i'm new sir, but as i mentioned before, it sounds better than my other gears already. gaganda pa? hmmmm... magkano kaya pa restore ;D Bro dalhin na kasi kay Master Hyper... FREE naman estimate eh.. Btw LIMITED lang naka EICO!!
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