doi20 Posted April 30, 2007 Share Posted April 30, 2007 buna seara! as dori sa stiu cam care e durata media de viata a lampilor 12ax7 (aproximativ, bineinteles). am cautat pe net, dar tot ce am gasit a fost pe siteu' marshall unde spuneau ca "in conditii normale" de cantat (oare ce o fi inseamnand asta?!) aceste lampi tin intre 2 si 3 ani. dar era vorba de uzul lor in sectiunile de pre-amplificare iar pe mine ma intereseaza cam cat tin in etajul de amplificator de putere (lampa aceasta e folosita pe seria ampurilor valvetronix de la vox, dar in mod mai putin tipic pentru ea, si anume amplificator de putere). sunt paralel cu domeniul amplificatoarelor/lampilor si al electricitarii in general (tot ce depaseste materia de baza de pana in clasa a 11-a ) asa ca mi-am pus intrebarea daca este mai mare uzura pentru utilizarea in voxurile mentionate, fata de pre-amp. informatii aditionale: 1) ma intereseaza vox ad30vt (daca va ajuta cu ceva in estimarea duratei de viata a lampii) 2) sunt constient ca acest amplificator nu este unul profesional, full-lampa, etc multumiri anticipate raspunsurilor competente Link to comment Share on other sites More sharing options...
Cosu Posted April 30, 2007 Share Posted April 30, 2007 ia intreaba-i direct pe ei ! E foarte posibil sa iti dea un raspuns si sa ne zici si noua http://www.voxamps.co.uk/support/suppform.asp Link to comment Share on other sites More sharing options...
doi20 Posted April 30, 2007 Author Share Posted April 30, 2007 (edited) de-obicei nu am incredere in ceea ce spune producatoru' pentru ca am impresia ca invariabil va da un raspuns in favoarea profitului sau. dar e buna ideea ta voi intreba si voi posta raspunsul cand (si daca) il voi primi Edited April 30, 2007 by doi20 Link to comment Share on other sites More sharing options...
karpi Posted April 30, 2007 Share Posted April 30, 2007 1000 de ore garantat zic uni , si probabil in putere " muzicala" , nu in regim continu de uz maxim Find 4x 12AX7 ECC83 MATCHED (TUNGSRAM) NOS NEW TESTED L@@K!! in the Consumer Electronics , Vintage Electronics ... guaranteed lifetime : 1.000 Hours . .. cum ai cautat ? altele au 10000 ore depinde de seria fabricata cele facyte ptr armata sunt mai longevive si mai bune... Link to comment Share on other sites More sharing options...
doi20 Posted April 30, 2007 Author Share Posted April 30, 2007 (edited) Find 4x 12AX7 ECC83 MATCHED (TUNGSRAM) NOS NEW TESTED L@@K!! in the Consumer Electronics , Vintage Electronics ... guaranteed lifetime : 1.000 Hours . .. am gasit si asta dar ce e garantat nu e decat varful ghetarului, sau cel putin asa sper dar nu stiu; am facut o comparatie cu reclamele la automobile, cand garanteaza cateva sute de km, dar te astepti ca masina sa te duca mult mai mult 1000/3 ore pe zi (nu cred ca exersez mai mult de atat sigur sigur ca vine si clasa a 12-a) inseamna aproximativ un an de exersat 3 ore zilnic. LE: si stiu si ca cele facute pentru armata tin mai mult, dar nu cred ca sunt folosite pe practice ampuri Edited April 30, 2007 by doi20 Link to comment Share on other sites More sharing options...
doi20 Posted May 1, 2007 Author Share Posted May 1, 2007 (edited) How often should I change the valves in my amplifier? This obviously depends on how often your amplifier is used, but with average use, the power valves should last between 1 - 2 years. The pre-amp valves do less work inside your amplifier and should last twice as long. However, this is only a general rule that considers the average wear on a valve and it must be appreciated that the life expectancy of a valve can be indeterminate. This means that no matter how much care and attention goes into making an amplifier and selecting good valves, a valve can suddenly fail and need replacing earlier in its life. Most guitar players will accept the fact that their guitar strings wear out or can snap unexpectedly, and will need replacing. The same consideration should also be given to the valves in your amplifier. Over a two-year period, you are likely to spend more on regular string replacement than on a new set of power-amp valves. Also, most players carry a spare set of strings in their case ready for the next string change. At some point it is likely that your amplifier will need some new valves, so it's good advice to carry some spare valves and fuses as well. de pe siteu' vox, sectiunea FAQs ... Edited May 1, 2007 by doi20 Link to comment Share on other sites More sharing options...
Cosu Posted May 1, 2007 Share Posted May 1, 2007 Cred ca aici se refera la modelele traditionale AC30&co Link to comment Share on other sites More sharing options...
doi20 Posted May 1, 2007 Author Share Posted May 1, 2007 da, dar macar e ceva orientativ... decat nimic inca nu mi-au raspuns... mai astept Link to comment Share on other sites More sharing options...
dgeekoo Posted May 1, 2007 Share Posted May 1, 2007 In primul rand ca Vox AD30vt este un amp hibrid cu finalul solid state. Deci 12ax7 este in preamp (ca nici nu vad cum ar putea fi in final). Ce scrie pe site-ul marshall se aplica si pentru Vox. Utilizare normala inseamna cam 3 ore pe zi. Deci ar fi cam 3000 de ore. Dar totdeauna lampile de preamp nu se uzeaza prea repede. Pana ajungi sa se uzeze lampa din preamp (ca una singura este) vei sti cu siguranta mult mai multe decat acum. Bafta. Link to comment Share on other sites More sharing options...
doi20 Posted May 1, 2007 Author Share Posted May 1, 2007 in manualul seriei valvetronix de pe sietu vox scrie The AD15VT, AD30VT, AD50VT si AD100VT use Valce Reactor technology and feature a power amp circuit containing a 12AX7 (ECC83) dual triode valve ("vacuum tube") that would normally be used in a preamp. oricum, multumes pentru raspuns Link to comment Share on other sites More sharing options...
dgeekoo Posted May 1, 2007 Share Posted May 1, 2007 (edited) Uite aici care este "schema": http://www.voxamps.co.uk/valvetronix/valve...alvereactor.asp Este sa zicem in poweramp dar in etajul de preamplificare (12ax7 nici nu este in stare sa dea un semnal de final).... Chestie de marketing. Vox-urile valvetronix insa sunt niste super scule pentru pretul lor. Edited May 1, 2007 by dgeekoo Link to comment Share on other sites More sharing options...
doi20 Posted May 1, 2007 Author Share Posted May 1, 2007 cred ca am inteles ce vrei sa spui multumesc mult pentru lamuriri si pentru parerea despre ampuri Link to comment Share on other sites More sharing options...
Guest Andrei_T Posted May 4, 2007 Share Posted May 4, 2007 Salut. 12ax7 poate fi folosita ca amplificator de putere. Are nevoie de un traf de iesire special. Puterea este mai mica de 0,5W dar cam asta e nivelul de cantat in casa pe un difuzor cu SPL bun (celestion eventual). Se consuma mai repede ca amplificator de putere decat folosita in mod normal in preamp. Andrei Link to comment Share on other sites More sharing options...
doi20 Posted May 4, 2007 Author Share Posted May 4, 2007 Salut. 12ax7 poate fi folosita ca amplificator de putere. Are nevoie de un traf de iesire special. Puterea este mai mica de 0,5W dar cam asta e nivelul de cantat in casa pe un difuzor cu SPL bun (celestion eventual). Se consuma mai repede ca amplificator de putere decat folosita in mod normal in preamp. Andrei multumesc de reply! Link to comment Share on other sites More sharing options...
ALEKS Posted May 7, 2007 Share Posted May 7, 2007 Lucrez cu lampi de ani de zile si pot spune ca aste lampi in versiunea militara (echivalentele directe rusesti 6H2P-EV) pot tine si 15.000 ore de functionare atata timp cat nu se saraceste emisia electronica (prin alimentarea filamentului cu tensiune mai mare decat cea nominala) si nu se forjeaza inutil anodul prin aplicarea unui B+ mai mare decat Unominal anodic. Lampile din seria 12AX7 si ECC83 pot tine 10.000 ore in conditiile stabilite. In statii de regula merg "in forja" si deci ai 5.000-7.500 ore de functionare. Cand se saraceste emisia catodica, lampa suna "sters" fara inalte sau fara bass. Numai bine, ALEKS Link to comment Share on other sites More sharing options...
doi20 Posted May 8, 2007 Author Share Posted May 8, 2007 10x Link to comment Share on other sites More sharing options...
tib Posted November 2, 2007 Share Posted November 2, 2007 interesant...nu stiam ca vox ac30 e asa misto...deci la noi cam cat e? 800ron? despre ac30vt e vorba, nu? pai, pana la urma scrie a 12AX7 dual-triode valve si in scheme arata 2...deci are 2 lampi in preamp, nu? Link to comment Share on other sites More sharing options...
Guest zzz Posted November 3, 2007 Share Posted November 3, 2007 interesant...nu stiam ca vox ac30 e asa misto...deci la noi cam cat e? 800ron? despre ac30vt e vorba, nu? pai, pana la urma scrie a 12AX7 dual-triode valve si in scheme arata 2...deci are 2 lampi in preamp, nu? Despre AD30VT e vorba... Link to comment Share on other sites More sharing options...
Cosu Posted November 3, 2007 Share Posted November 3, 2007 interesant...nu stiam ca vox ac30 e asa misto...deci la noi cam cat e? 800ron? despre ac30vt e vorba, nu? pai, pana la urma scrie a 12AX7 dual-triode valve si in scheme arata 2...deci are 2 lampi in preamp, nu? AC30 e in alt film fiind un amplificator care are etajul de putere facut cu tuburi. Ar fi bine sa fie 800 de ron ca mi-as lua si eu vreo 10 sa am asa pentru batranete Link to comment Share on other sites More sharing options...
tib Posted November 3, 2007 Share Posted November 3, 2007 Aha, am inteles, ms Cosu! deci ac30vt nu e mai tare...ca ac30 (chiar daca pare) Link to comment Share on other sites More sharing options...
hihi Posted November 3, 2007 Share Posted November 3, 2007 Aha, am inteles, ms Cosu!deci ac30vt nu e mai tare...ca ac30 (chiar daca pare) Este ad30vt.. si crede-ma ca nu e deloc tare. AC30 e un amplificator legendar. AD30.. este o chestie mica cu efecte digitale cu 1 lampa in preamp, buna pentru inceput. Link to comment Share on other sites More sharing options...
tib Posted November 4, 2007 Share Posted November 4, 2007 a....greseala mea...scz...le-am confundat...si deci ad30vt nu e bun ( daca ati sti ca sambata plecasem la muzica sa-mi iau unul, si am ajuns dupa 40 minute de la inchidere ) ma gandeam ca are efecte, lampa, dif de 10'', deci chiar mi s-a parut misto....bine, atunci intreb: pedalele vox cooltron (in special bulldog dist) sunt bune...sa nu-mi spuneti dupa ce-mi iau (luni am planuit o vizita la muzica...nu stiu daca ajung cu scoala asta da incerc..) ca nu-s bune.... eu as fi vrut un amp cu lampa (macar una acolo ) care e cea mai buna solutie, rap. calitate/pret... parerea voastra...? ------stiu ca nu am postat unde trebuie...dar poate avea legatura ----- Link to comment Share on other sites More sharing options...
Guest Baumwolle Posted November 4, 2007 Share Posted November 4, 2007 Nu a zis nimeni ca AD30VT nu ar fi bun, ci doar ca nu are rost o comparatie cu AC30-ul, fiind vorba de un total alt segment, atat ca scop, calitate a sunetului, pret. In legatura cu seria de pedale VOX cu lampi, eu zic ca merita incercate, dar la fel de bine merita incercate si alte pedale similare, gen SFX03-ul de la Seymour Duncan sau Silver Dragon-ul de la Rocktron. Incearca mai multe variante, cat multe poti. Nu te grabi. Succes! Link to comment Share on other sites More sharing options...
tib Posted November 4, 2007 Share Posted November 4, 2007 da...intelesesem diferenta dintre ac si ad uitati...am incercat sa-mi comand half-stack-ul asta epiphone valve jr. cu head + cab ( nu ma deranjeaza ca nu are efecte, aveam eu oricum)...dar l-am gasit la pret bun doar pe situri americane....music123, guitar center, musicians friend etc...si nu trimit in europa...la ei stacku' costa 250$(super-marfa)...ori pe thomann ajungi la 300eur! spuneti-mi si mie un site unde pot sa-l gasesc si sa mi-l trim. in rom. (asta daca am vreo sansa..) Link to comment Share on other sites More sharing options...
Guest Andrei_T Posted November 9, 2007 Share Posted November 9, 2007 interesant...nu stiam ca vox ac30 e asa misto...deci la noi cam cat e? 800ron? despre ac30vt e vorba, nu? pai, pana la urma scrie a 12AX7 dual-triode valve si in scheme arata 2...deci are 2 lampi in preamp, nu? Nu sunt 2 lampi, sunt 2 jumatati de lampa ECC83. Lampa ECC83 are 2 triode (element de amplificare cum e tranzistorul) in ea. Ele sunt reprezentate in schema. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now