PinoyDVD: The Pinoy Digital Video & Devices Community
Home Theater => Audio => Amplifier => Topic started by: innocent on Sep 05, 2015 at 06:37 PM
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Is there anybody who knows the effects of this transformer volume control preamp to low wattage single ended triode amp such as 6bm8? What I understand is that, it increases the db of the input and output. So it may increase attack to my 100db speakers. It's what I need for now to improve performance of my 6bm8 SET. Is my speculation correct? Kindly enlightened me.
If there anybody who can locally manufacture this TVC? How much? Thank you. :)
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you may want to ask around for mang Rod Teope, He makes TVC preamp and tube amp as well.
i have his number in my old fone before...
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Is there anybody who knows the effects of this transformer volume control preamp to low wattage single ended triode amp such as 6bm8?
I'm not sure what you are expecting but a TVC attenuates the input signal by stepping it down, the amount of attenuation is selected by selecting different taps in the secondary of the transformer. The truth of the matter is that with TVCs, the output impedance changes as you change taps as opposed to the manner employed by all resistive potentiometers that creates a voltage divider between the input and the output and presents a constant impedance across the entire adjustment range.
What I understand is that, it increases the db of the input and output.
It does not.
In fact, it does quite the opposite. Being a step-down transformer, the attenuation is accomplished by varying the ratio of the primary versus the secondary windings, however, this is not practical so to be able to choose different attenuation levels, one must use a "stepped" rotary switch and choose the appropriate tap that corresponds to the desired signal attenuation level.
So it may increase attack to my 100db speakers. It's what I need for now to improve performance of my 6bm8 SET.
I doubt it. No type of volume control nor preamp can do that to an amp, especially to a tube amp. Most tube amps are "lazy" risers, for they tend to compress the signal and prevent distortion. This is, for what it's worth, is sometimes what is sought after from them. But for your predicament, perhaps a further study of the input section of your amp and stiffening your psu can improve the "attack" you are referring to but at the expense of compression and distortion.
You change one thing for the sake of another thing applies here.
Is my speculation correct? Kindly enlightened me.
I hope I didn't lost you up there, it can be quite technical and I was trying to be as objective as I can in my response rather than be subjective.
If there anybody who can locally manufacture this TVC? How much? Thank you. :)
I am not aware of such but, IMHO, you may want to reconsider, the reason these TVCs, and moving coil SUTs are priced like that is because of the materials required and the strict tolerance that they must go through during manufacturing. You get what you pay for in this department.
Anyway, you may want to take that last paragraph with a grain of salt.
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I agree with JojoD.
But before jumping into another system component, see if there is a mismatch between your preamp output and your power amp input. Try borrowing a tubed buffer (aka, MF X-10D) and connect between your preamp and poweramp. See or rather hear what happens......
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If there anybody who can locally manufacture this TVC? How much? Thank you. :)
Mang Rod s the guy.....;)
if I many ad to what jojod has said, TVC is a passive device, attenuates the signal much like a volume pot...
it has insertion loss and impedance is not uniform with frequency.....Z= 2pifL....
where Z is the impedance, f is frequency and L is inductance of the coils...
it can be made as an isolation type or autotransformer type....
best to use this TVS between a power amp and a preamp if used....
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Spot on. And like I said, the impedance varies wildly which, may, or may not, be a match to the preceding stage.
It is common for tube amps to have 470K-ish and above whist a modern Class D amp has a typical input impedance of 10K. So be guided accordingly to prevent a mismatch.
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i tried to convince the owner of Golden Mars to make the TVC's offering to give them my design, but no deal...;)
i figured years ago that i am not making this TVC, it will be very costly and difficult to make....
but those who are interested to make one, you can ask Rey Lus to make one for you....09332235765
i can give him my coil winding data.....Rey Luis is the official traffo winder for Rene Rivo....
or you can also ask Boy Pangilinan of Deeco...
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any one? i talked to Rey Luis a couple of months ago, about 3k for a pair is my estimate...
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any one? i talked to Rey Luis a couple of months ago, about 3k for a pair is my estimate...
Sir Tony pano config or wiring neto? Ilang taps para malaman kung ilan switch/selector kailangan? Si mang Rey gawa pala kaya pulido rin yan.
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Sir Tony pano config or wiring neto? Ilang taps para malaman kung ilan switch/selector kailangan? Si mang Rey gawa pala kaya pulido rin yan.
this is just a continuous winding with several taps, the number of taps
depends on the rotary switch you want to use, anywhere between six to 24 position will do...
in all honesty, i made several attempts to make this, pero palagi akong napuputulan ng wire,
tinigilan ko....pasmado kasi kamay ko...
btw, i was on the phone with mang rey this morning, he says he is good to go
with this, i can guide him with this build, no problem....
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mang rey luis is making his first attemp of this TVC......soon he will be accepting orders if it will be successful :)
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Mang rey just finished his first tvc. Maganda pala talaga ito nag improve dramatically ang system ko burning period palang ayos na ano pa kayang surprises ilalabas nito >:D...feeling hexited ^-^
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my design has been validated..... we were in constant communication with mang Rey Luis
......no burning period with this one, just use this tvc and enjoy.......
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Mang rey just finished his first tvc. Maganda pala talaga ito nag improve dramatically ang system ko burning period palang ayos na ano pa kayang surprises ilalabas nito >:D...feeling hexited ^-^
Congrats to you bro! Im glad you have a TVC preamp similar to this TVC SQ.
http://www.tnt-audio.com/ampli/django_e.html
So expensive! At least kay Mang Rey mura at same SQ lang din naman. I also found out that tvc quality depends on tranny design.
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mang rod teope also makes tvc's....he was first to make these several years ago, rey luis is the second person to make one....
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Congrats to you bro! Im glad you have a TVC preamp similar to this TVC SQ.
http://www.tnt-audio.com/ampli/django_e.html
So expensive! At least kay Mang Rey mura at same SQ lang din naman. I also found out that tvc quality depends on tranny design.
thanks bro! dead silent din ito. very happy camper here!
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thanks bro! dead silent din ito. very happy camper here!
that is a passive devise, silence is to be expected, it is but natural...
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panganay ni mang rey ;D >:D >:D >:D
(http://i1295.photobucket.com/albums/b622/remington0624/13428010_537800746428480_8151438718089494653_n_zpskvkw5vqm.jpg) (http://s1295.photobucket.com/user/remington0624/media/13428010_537800746428480_8151438718089494653_n_zpskvkw5vqm.jpg.html)
(http://i1295.photobucket.com/albums/b622/remington0624/13418998_537800743095147_1634932037652146739_n_zpsyw8qkopk.jpg) (http://s1295.photobucket.com/user/remington0624/media/13418998_537800743095147_1634932037652146739_n_zpsyw8qkopk.jpg.html)
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jun,may hot thread pektyur ka ba jan..
patingin ng nude shots ;D...
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Mag Rey really has the "ears" to make Audio equipment.
Congratulations!
Mang rey just finished his first tvc. Maganda pala talaga ito nag improve dramatically ang system ko burning period palang ayos na ano pa kayang surprises ilalabas nito >:D...feeling hexited ^-^
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jun,may hot thread pektyur ka ba jan..
patingin ng nude shots ;D...
]wala pa ko nude shots sir kuhaan ko pag binuksan ko ulit.
Mag Rey really has the "ears" to make Audio equipment.
Congratulations!
thanks sir!
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jun,may hot thread pektyur ka ba jan..
patingin ng nude shots ;D...
Nude? Baka ma censor tayo niyan? ;D
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(http://i1295.photobucket.com/albums/b622/remington0624/13418998_537800743095147_1634932037652146739_n_zpsyw8qkopk.jpg) (http://s1295.photobucket.com/user/remington0624/media/13418998_537800743095147_1634932037652146739_n_zpsyw8qkopk.jpg.html)
Sir bat parang andami RCA sa likod? Ilan ins at out sya? Ilan steps attenuation din?
More details sana if possible. Thanks
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2 input 2 output 22 steps attenuaton sir
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Sir bat parang andami RCA sa likod? Ilan ins at out sya? Ilan steps attenuation din?
More details sana if possible. Thanks
Norman, eto ang pinagmulan nyan.....http://www.diyaudio.com/forums/tubes-valves/51391-poor-mans-transformer-volume-control.html
pwede naman lagyan ng input selector so you can choose two or more line amps or sources,
pwede rin lagyan ng buffer bago TVC.....maraming pwedeng gawin....
meron akong niluluto, isolation type, pwede gawing balanced outputs...
mag-uusap pa kami ni Rey Luis...
(http://img.photobucket.com/albums/v684/coffin1967/MVC/trans04.jpg)
(http://img.photobucket.com/albums/v684/coffin1967/MVC/swwiring.jpg)
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jun,may hot thread pektyur ka ba jan..
patingin ng nude shots ;D...
wala namang masyadong makikita sa loob...pagawa ka na, wala ka pan nyan, better kung yung coil former ni Edrel at yung Z11 na bakal nya ang gagamitin....;) we do not have nickel laminates here so GOSS is good enough.....
for those wanting to build this TVC is the schematic:
(http://www.diyaudio.com/forums/attachments/tubes-valves/355137d1371634516-poor-mans-transformer-volume-control-tvc_3423.jpg)
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was at DEECO this noon, and guess who i bumped into? no other than the builder of this TVC....
Ronald DeJesus, he was the diy'er who put this thing together, he built a yellow ST70 that was
able to drive electrostatic speakers....
i met Ronald in 2010 in december in dampalit , malabon, we were co-judges in a music exhibition...
so now it can be told, Ronald DeJesus, tvc builder,
Rey Luis, winder of the tvc traffo....
and Tony Tecson designed this tvc.....
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wala namang masyadong makikita sa loob...pagawa ka na, wala ka pan nyan, better kung yung coil former ni Edrel at yung Z11 na bakal nya ang gagamitin....;) we do not have nickel laminates here so GOSS is good enough.....
for those wanting to build this TVC is the schematic:
(http://www.diyaudio.com/forums/attachments/tubes-valves/355137d1371634516-poor-mans-transformer-volume-control-tvc_3423.jpg)
any one? i talked to Rey Luis a couple of months ago, about 3k for a pair is my estimate...
how muchos gracias..price kaya?
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how muchos gracias..price kaya?
ikaw pa? yakang yaka, if you can convince Edrel to wind a pair for you,
Edrel have z11 cores that will ensure about 3 times more inductance
for a better low frequency handling....pay him a visit...
switches are available here.....http://www.mableaudio.com/en/productview-817.html
(http://www.mableaudio.com/uploadFile/Picture_small/201309161553213227.jpg)
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papaT , tineks ko na si Edrelski...
sabi ko mag wind sya ng madami mdami, for pdvd Diyers ;D
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papaT , tineks ko na si Edrelski...
sabi ko mag wind sya ng madami mdami, for pdvd Diyers ;D
gud, kukuha rin ako ng isang pares....')
maka order na nga rin ng rotary switch...
yung mga order fo sa Ali Express, more than a month na wala pa rin...
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TVC in action with one of my dogs roaming around ;)
https://www.youtube.com/watch?v=MQtgXPZo-do&feature=youtu.be
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TVC in action with one of my dogs roaming around ;)
https://www.youtube.com/watch?v=MQtgXPZo-do&feature=youtu.be
Nice! May improvement nga. Tight and clean
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latest edition of mang rey luis's TVC made for a handsome gentleman from somewhere ;)
(http://i1295.photobucket.com/albums/b622/remington0624/IMG_20160707_181542_zpsjdljsoz5.jpg) (http://s1295.photobucket.com/user/remington0624/media/IMG_20160707_181542_zpsjdljsoz5.jpg.html)
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it is good to know that Mang Rey Luis has another source of income....;)
@Dana, we are sourcing 7/8 inch bobbins so that winding will be much easier....
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He will accept orders na daw master and I will help him in marketing his obra :)
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good to know, i have been convincing mang Rey and Gerry to start making and selling their own amps...
these are two unsung hero's for the local diy....
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Hi, I am very interested to get one. One pair of input is enough for my intended use right now.
How to proceed? :D
moises/dogears
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contact mang rey luis 0933-2235765
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^thanks chief
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sent mang rey initial payment na
any of you guys from wiredstate? :)
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sent mang rey initial payment na
any of you guys from wiredstate? :)
@dibidibibdi, the key here is to get multi tap rotary switch,
i saw some 8 and 12 position rotary switches at DEECO.....
i have told Rey Luis what to do....
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Thanks Mang Rey, you are really a master of your craft - TVC. Aesthetics n lang kailangan ma improve.
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Ang laki talaga ng improvement ng SQ sa tvc ano bro? kailangan nalang talaga pagandahin ni mang rey ang box para totally A ok na... ^-^
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Ang laki talaga ng improvement ng SQ sa tvc ano bro? kailangan nalang talaga pagandahin ni mang rey ang box para totally A ok na... ^-^
Iba ang pagkagawa. Nasa tranny talaga ang foundationat sikreto ng maganda TVC.
Imagine nasa 1,200usd ang TVC sa abroad. Tama aesthetics na lang. Lupet... Pag mag tube amp ako power amp n lang.
Wala pa patayan since last night set up ko bro.. Nakaka adik pg may tvc.
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Is it possible to incorporate a remote control on a TVC?
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di yata pwede sir jojo passive ito ^-^ pero lets wait for the masters to chime in ;)
Iba ang pagkagawa. Nasa tranny talaga ang foundationat sikreto ng maganda TVC.
Imagine nasa 1,200usd ang TVC sa abroad. Tama aesthetics na lang. Lupet... Pag mag tube amp ako power amp n lang.
Wala pa patayan since last night set up ko bro.. Nakaka adik pg may tvc.
sabi ko sayo magugustuhan mo e hehehe parang pinupunit AN ko sa lutong ng SQ pag percussion nakasalang ;D
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di yata pwede sir jojo passive ito ^-^ pero lets wait for the masters to chime in ;)
sabi ko sayo magugustuhan mo e hehehe parang pinupunit AN ko sa lutong ng SQ pag percussion nakasalang ;D
Mang Rey's TVC is very transparent. Naapreciate ko siya ng husto kapag maganda ang source. You will mesmerize. Napaka natural ng detalye. Inilalabas nya natural timbre ng instrumento. Kung maganda ang source at maganda ang power amp na gamit, dun mo lalo mas maapreciate ang ganda ng set up mo pag may TVC.
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Is it possible to incorporate a remote control on a TVC?
possible, and if there is anyone who can do it here, jojoD or mang Andrew AMX can,
remote control selection by relays is possible with off the shelf controllers at e-bay...http://www.ebay.com/itm/16-Channel-Relay-Module-Control-Shield-Controller-5V-12V-24V-PLC-Driver-Board-/281980999666
you may also want to touch bases with rochie, dandy f menor has a solution for that...
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Di hindi na sya passive master?
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Di hindi na sya passive master?
Oo nga ano...
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Di hindi na sya passive master?
passive pa rin, yung rotary switch lang naman ang binago mo....
imbes na rotary switch, relays to select the tap on the tvc.
ot pwede rin na motor coupled to the rotary switch, para control by remote...
more complicated nga lang....pero pwede...
techies will know what i am talking about.......i post ko nga ito sa facebook....;)
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ano ang magpapa andar sa motor or sa relay master yung kuryente coming from the source?
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^ Wall wart
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ano ang magpapa andar sa motor or sa relay master yung kuryente coming from the source?
Bro possible.. Bale ang may supply lang ng kuryente yung remote. May motor ksi yon vol.pot nun. Yon lang remote may kuryente pero passive pa din tranny..ksi wala namn supply na kuryente dun. Mas maganda kung modify, battery operated motor sa vol.pot para mukha passive pa din tignan TVC. Madali lang yan basta available pyesa gagamitin.
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Exciting and interesting for a lazy listener like me.
Bro possible.. Bale ang may supply lang ng kuryente yung remote. May motor ksi yon vol.pot nun. Yon lang remote may kuryente pero passive pa din tranny..ksi wala namn supply na kuryente dun. Mas maganda kung modify, battery operated motor sa vol.pot para mukha passive pa din tignan TVC. Madali lang yan basta available pyesa gagamitin.
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Bro possible.. Bale ang may supply lang ng kuryente yung remote. May motor ksi yon vol.pot nun. Yon lang remote may kuryente pero passive pa din tranny..ksi wala namn supply na kuryente dun. Mas maganda kung modify, battery operated motor sa vol.pot para mukha passive pa din tignan TVC. Madali lang yan basta available pyesa gagamitin.
tama......you may also get in touch with Ronald de Jesus thru Rey Luis, sanggang dikit yang mga yan, ;)
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ano ang magpapa andar sa motor or sa relay master yung kuryente coming from the source?
kung motor coupled to the rotary switch, syempre merong electronics yan...
kung mga relay naman, electronics din ang magpapaandar...
ayan, marami kang options, sigfuradong nag-iisip ka na ngayon....:D
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kung motor coupled to the rotary switch, syempre merong electronics yan...
kung mga relay naman, electronics din ang magpapaandar...
ayan, marami kang options, sigfuradong nag-iisip ka na ngayon....:D
ok master kuha ko na ^-^ Medyo lalaki nga lang ang box pag may relay or motor
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ok master kuha ko na ^-^ Medyo lalaki nga lang ang box pag may relay or motor
Hay naku Jhun, panigurado parang gusto mo n din ng nka remote. Ipapabago mo na naman kaha. Ako kuntento na ako sa basic tvc. Yon lang bagay sa akin. Iv heard a TVC before, pero iba talaga pag pinoy ang gumawa ng version. Mura talaga at mabangis ang SQ.
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ok master kuha ko na ^-^ Medyo lalaki nga lang ang box pag may relay or motor
Relay seguro sir pwede for mutliple tap or assigned configs para same taps as per TVC pero motor I don't see paano workings neto for a multi tap TVC, remember yout TVC is multi impedance matching/difference kaya selector switch ang dating ng volume pot mo not ordinary POT na say 100K log taper yan, its 12-16 ways switch or more, plus di kaya maingay ang pag volume up/down mo neto using relay or switch? Tik-tak sound?
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naisip ko din yan sir ndotcom ewan lang natin kung may way pag motorized vol controll gagamitin di naman siguro pwede kabitan ng motor yung multi tap na volume pot kasi matigas baka di mapaikot ng motor. Pwede talaga relay and oks din lang ingay ng relay maingay din pihitin rotary volume pot hehehe
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Relay seguro sir pwede for mutliple tap or assigned configs para same taps as per TVC pero motor I don't see paano workings neto for a multi tap TVC, remember yout TVC is multi impedance matching/difference kaya selector switch ang dating ng volume pot mo not ordinary POT na say 100K log taper yan, its 12-16 ways switch or more, plus di kaya maingay ang pag volume up/down mo neto using relay or switch? Tik-tak sound?
pwede ang logic up and down counters....
controlled by remote controller....
parang remote ng cd player...
meron palagay kong available sa market...
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Nah sir remington I will stick with switch/selector kasi pag nasa point ka na ok na yung volume eh stick ka na dun, yung nga lang ok to sa CD,LP,SACD or physical source pero pag music files na di mo controlled ang volume/loudness ng isa file/song dyan na magkatalo tatayo ka talaga to adjust volume :)
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Relay seguro sir pwede for mutliple tap or assigned configs para same taps as per TVC pero motor I don't see paano workings neto for a multi tap TVC, remember yout TVC is multi impedance matching/difference kaya selector switch ang dating ng volume pot mo not ordinary POT na say 100K log taper yan, its 12-16 ways switch or more,
See motorized rotary switch.
(http://img.photobucket.com/albums/v70/jojod818/Dump/motrotsw_zps0sqevxaj.jpg~original) (http://smg.photobucket.com/user/jojod818/media/Dump/motrotsw_zps0sqevxaj.jpg.html)
plus di kaya maingay ang pag volume up/down mo neto using relay or switch? Tik-tak sound?
You'll barely hear it.
This is what's used on a Sonic Frontiers SF1 preamp that I repaired. I can barely hear the relays clicking even with the top cover off.
(http://img.photobucket.com/albums/v70/jojod818/Dump/relysw_zpsnmukznoc.jpg~original) (http://smg.photobucket.com/user/jojod818/media/Dump/relysw_zpsnmukznoc.jpg.html)
I believe this advice hasn't been given on this thread but either way you go about with the switching, you'll need to use what is called a "make-before-break" type switch. So if you use cheap rotary switches from Deeco you'll notice a momentary signal drop when you switch between taps, actually you'll lose complete signal if you manage to set the switch between any two positions where it doesn't make contact to any points.
Make-before-break switches are not a must for TVCs and their pretty expensive so most commercial TVC costs' are substantial and has nothing to do with being made by a pinoy. And since this falls under magnetic device classifications, it is needless to say that the copper and most importantly the core must be of exceptional quality, otherwise, phase shifts and frequency cutoffs will be a problem.
As for relay arrays, make sure that the shift register pushes a logic 1 on to the next register before applying a logic 0 on the other, that action will make it behave like a make-before-break switch.
Good luck. Hope this helps.
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They might have different song quality, but still you can hear the difference.
1. Without TVC and Mundorf:
https://m.youtube.com/watch?v=mu7nwl04l2M
2. With TVC and Mundorf:
JELabs:
https://youtu.be/ZnDAYaIi12Q
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latest edition of mang rey's TVC ;)
(http://i1295.photobucket.com/albums/b622/remington0624/IMG_20160811_181108_zpswzigdnqp.jpg) (http://s1295.photobucket.com/user/remington0624/media/IMG_20160811_181108_zpswzigdnqp.jpg.html)
(http://i1295.photobucket.com/albums/b622/remington0624/IMG_20160811_170642_zpspclmuseg.jpg) (http://s1295.photobucket.com/user/remington0624/media/IMG_20160811_170642_zpspclmuseg.jpg.html)
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latest tweak ;)...solid aluminum knobs :)
(http://i1295.photobucket.com/albums/b622/remington0624/IMG_20160816_091308_zpsqgzpmu8c.jpg) (http://s1295.photobucket.com/user/remington0624/media/IMG_20160816_091308_zpsqgzpmu8c.jpg.html)
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another two finished TVC project of mang Rey Luis... ;)
(http://i1295.photobucket.com/albums/b622/remington0624/IMG_20160824_142011_zpsxhzdbm3u.jpg) (http://s1295.photobucket.com/user/remington0624/media/IMG_20160824_142011_zpsxhzdbm3u.jpg.html)
(http://i1295.photobucket.com/albums/b622/remington0624/IMG_20160824_142025_zpsxocnbkvh.jpg) (http://s1295.photobucket.com/user/remington0624/media/IMG_20160824_142025_zpsxocnbkvh.jpg.html)
(http://i1295.photobucket.com/albums/b622/remington0624/IMG_20160824_142112_zpsjonlfn0k.jpg) (http://s1295.photobucket.com/user/remington0624/media/IMG_20160824_142112_zpsjonlfn0k.jpg.html)
(http://i1295.photobucket.com/albums/b622/remington0624/IMG_20160824_142128_zpsyy9jh1or.jpg) (http://s1295.photobucket.com/user/remington0624/media/IMG_20160824_142128_zpsyy9jh1or.jpg.html)
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another one from mang rey luis...a grain oriented core, 2 input 3 output with 12 step volume attenuation ;)
(http://i1295.photobucket.com/albums/b622/remington0624/14199639_576450105896877_4807357490964396506_n_zps0ytrpnml.jpg) (http://s1295.photobucket.com/user/remington0624/media/14199639_576450105896877_4807357490964396506_n_zps0ytrpnml.jpg.html)
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i purchased these rotary switches by mistake,,,,,
so what to do? i designed a new TVC to use the new switches,
you can ask Rey Luis to make the tvc....
(http://i5.photobucket.com/albums/y155/leoman53/IMG_82501_zpsbak2fpxf.jpg) (http://s5.photobucket.com/user/leoman53/media/IMG_82501_zpsbak2fpxf.jpg.html)
new winding schedule:
(http://i5.photobucket.com/albums/y155/leoman53/tvc_zpsrjwo0vrl.jpg) (http://s5.photobucket.com/user/leoman53/media/tvc_zpsrjwo0vrl.jpg.html)