Popular Post strawberry8 Posted May 10, 2022 Popular Post Share Posted May 10, 2022 dazi restauracijas projekti noversti visi iepriekshejo remontu defekti/efekti korozija kas sakrajies pa desmitgadem viss noregulets un ideala stavokli lai darbotos nakamas desmitgades 6 1 Link to comment Share on other sites More sharing options...
ggg97 Posted May 10, 2022 Share Posted May 10, 2022 Uz tādas Saktiņas visu bērnību un agrīno jaunību nokapāju. Raimi, Zodiaku, u.c. 1 Link to comment Share on other sites More sharing options...
strawberry8 Posted May 10, 2022 Author Share Posted May 10, 2022 Saktai domaju smagajam koka korpusam izmantots zeltains shelaks Link to comment Share on other sites More sharing options...
strawberry8 Posted October 6, 2022 Author Share Posted October 6, 2022 divas S70 pirms un pec pilnas apkopes ieksha 20gadu kratie atrie remonti aprautas un neesoshas skruves nomainits 3 Link to comment Share on other sites More sharing options...
strawberry8 Posted October 10, 2022 Author Share Posted October 10, 2022 Radiotehnika U-7101, Radiotehnika UKU-020 4 Link to comment Share on other sites More sharing options...
Popular Post IMANTS Posted October 14, 2022 Popular Post Share Posted October 14, 2022 Bet es "uzlaboju" UP001 izskatu... 8 Link to comment Share on other sites More sharing options...
strawberry8 Posted October 15, 2022 Author Share Posted October 15, 2022 gala pakapes uzlabojums Radiotehnika U-101. THD cerams zem ~0.001% kads luznu vacejs bija apstradajis kads bija uzlabojis U-7111 uz TDA7294 bet rezultats sliktaks par originalo (kkas ar to konstruktorina shemu bija ne ta.. vai ari amperu par maz) Link to comment Share on other sites More sharing options...
osscar Posted October 15, 2022 Share Posted October 15, 2022 nē nu skaidrs ka par maz ampēru...nu ja oriģinālā shēma ir salodēta izmantojot labus komponentus - tda atpūšas Link to comment Share on other sites More sharing options...
strawberry8 Posted October 19, 2022 Author Share Posted October 19, 2022 Radiotehnika Arija-102 uzlabots https://www.ebay.com/itm/304526368495 Link to comment Share on other sites More sharing options...
osscar Posted October 19, 2022 Share Posted October 19, 2022 tikai godīgi - kā ar fonu šādā izpildījumā ? Link to comment Share on other sites More sharing options...
strawberry8 Posted October 19, 2022 Author Share Posted October 19, 2022 ko tur godigi. iespeja bija ka traucejumi naks ieksha, bet to kasti skulptoret negribeju un nebija laika eksperimentiem klients ar 20EUR dzirdi nesudzas THD zems, tuksgaita ar pilnu skalumu ir neliels 50Hz fons Link to comment Share on other sites More sharing options...
Popular Post strawberry8 Posted October 26, 2022 Author Popular Post Share Posted October 26, 2022 TANDBERG SOLVSUPER 12 izdedzis apgaismojums salabots/modernizets uz LED 5 Link to comment Share on other sites More sharing options...
ggg97 Posted October 26, 2022 Share Posted October 26, 2022 M skalā redzama arī Rīga, bet starp 1000 un 1200 kHz. Vai ta nebija zemāk, kautkur ap 700 kHz. Uz ātro nevaru atrast. Link to comment Share on other sites More sharing options...
strawberry8 Posted October 27, 2022 Author Share Posted October 27, 2022 Marantz PM-66SE TA7317P salabots/uzlabots ar pashtaisitu aizvietotaju M7317 Aliexpress atsutija viltojumus Link to comment Share on other sites More sharing options...
raiviic Posted October 27, 2022 Share Posted October 27, 2022 pirms 22 stundām , ggg97 teica: Vai ta nebija zemāk, kautkur ap 700 kHz. Pamatā jau bija 521,7 metri, bet šķiet 70-tajos sāka raidīt (vismaz Kurzemes pusē) arī kaut kur ap 260m (precīzi neatceros). Link to comment Share on other sites More sharing options...
strawberry8 Posted November 10, 2022 Author Share Posted November 10, 2022 Radiotehnika U-101 salauzts tikla sledzis un poga kondensatori mikroshema sabojatas DIN ligzdas 2 Link to comment Share on other sites More sharing options...
strawberry8 Posted November 22, 2022 Author Share Posted November 22, 2022 (edited) Radiotehnika U-7111 gala pakapes tranzistori KT850 KT851 mikroshema kondensatori tikla ligzda nolausta blavas LED nomainits radiators aizlipis ar gruziem Edited November 22, 2022 by strawberry8 1 Link to comment Share on other sites More sharing options...
Jurkins Posted November 22, 2022 Share Posted November 22, 2022 1 stundu atpakaļ, strawberry8 teica: gala pakapes tranzistori KT850 KT851 Ej nu! Šiem tak kolektora strāva 2A. Nezinu par 7111, bet citos krievānu aparātos izmantoja pirms KT854, KT855. Tas jau pofig, ka korpuss TO220. Link to comment Share on other sites More sharing options...
strawberry8 Posted November 22, 2022 Author Share Posted November 22, 2022 (edited) 17 minutes ago, Jurkins said: Ej nu! Šiem tak kolektora strāva 2A. Nezinu par 7111, bet citos krievānu aparātos izmantoja pirms KT854, KT855. Tas jau pofig, ka korpuss TO220. KT854/KT855 ir labi KT850 der jebkurs tansistors hfe~100@2A 100V 35V / 3.5ohm = 10Apk / ~20hfe@5A = 0.5A Ib + be capacitate ~100nF? Edited November 22, 2022 by strawberry8 Link to comment Share on other sites More sharing options...
strawberry8 Posted December 8, 2022 Author Share Posted December 8, 2022 darbnica https://www.facebook.com/profile.php?id=100067456893101 Link to comment Share on other sites More sharing options...
strawberry8 Posted February 12, 2023 Author Share Posted February 12, 2023 VEF elektroakustiskais agregats visas detalas sarusejushas un atjaunotas 4x silicija tranzistori ielikti 2 Link to comment Share on other sites More sharing options...
noname Posted February 12, 2023 Share Posted February 12, 2023 Nichicon gold nav maķenīt overkills šitam verķim? Link to comment Share on other sites More sharing options...
strawberry8 Posted February 12, 2023 Author Share Posted February 12, 2023 (edited) FW serija ir leta (vairuma) cenas zina salidzinama ar samwha RD un normalas kvalitates china barokli ielikti 2.2mF un 1mF RD samwha LTspice simulacija VEF elektroakustiskais agregats.asc Edited February 12, 2023 by strawberry8 Link to comment Share on other sites More sharing options...
strawberry8 Posted February 20, 2023 Author Share Posted February 20, 2023 Radiotehnika U-101 kondensatori nomainiti palielinata jauda 10 000uF kondensatori jaudas pakape parcelta uz 30V UNC50-8 LTspice simulacija 0.01%THD UNC50-8.asc 3 Link to comment Share on other sites More sharing options...
strawberry8 Posted March 6, 2023 Author Share Posted March 6, 2023 Radiotehnika MR-5201 radio tranzistoriem KT3126A nokritis pastiprinajums lidz arko jutiba zema UIV bloka iznemti 3 kondensatori lai butu 88..98MHz diapazons pastiprinatajam jauni kondensatori 10 000uF 15mΩ. lai butu lielaka jauda magnetafonam salaboti nopauztas ieraksta un partishanas svinas/pogas. autostops keras. viss salabots magnetafona indikatoram nomainitas blavas LED. indikatora LTspice simulacija notiriti taukainie nosedumi un puteklu karta un iesmereti kontakti lai vairak neoksidetos, ka jauns bargraph LED.asc 4 Link to comment Share on other sites More sharing options...
noname Posted March 6, 2023 Share Posted March 6, 2023 (edited) 10k uF uz 10W/kanālā ir apmēram trīskāršs overkills. Esi drošs ka tās taisngrieža diodes turēs to surge strāvu? Jo to simulācija diezin vai pateiks priekšā. Edited March 6, 2023 by noname Link to comment Share on other sites More sharing options...
osscar Posted March 6, 2023 Share Posted March 6, 2023 Da ne kāds tur overkils...būs gerai . Rāda simulators arī surge. Link to comment Share on other sites More sharing options...
strawberry8 Posted March 6, 2023 Author Share Posted March 6, 2023 (edited) izmeriju, D242 diodes pretestiba bija zemaka par vairumu tiltinu sapratiga/videja cenu diapazona. upgrade izmaksatu dargi pec LM3886 datulapas 30V dod ~40W/8Ω un ~80W/4Ω . Uz kanalu (30V - 2.5Vce) / 4Ω = 6.88Apk kas basiem ar vecajiem kondensatoriem 200mΩ ESR * 6.88Apk * 2 = 2.76V baroshanas kritums kas ierobezo potencialo jaudu, tad faktiski sanak 10W/kanalu. Originalie kondensatori meriti ar 1% pielaidi un pie 1kHz un ESR ir tipiski robezas ~50mΩ..bezgaliba. Merot kondensatorus daudzi nenem vera ka darbojas merinstruments un vai merijums dod falsu pozitivu merijumu utt. Interesanti kadu formulu RRR izmantoja aprekiniem originalam 4000uF 4Ω/2 kas iznak 20Hz . kad skatas reklamas tad viss ir vienkarshi, bet kad veic aprekinus un merijumus tad viss ir sarezgiti pastiprinataja baroklis.asc Edited March 6, 2023 by strawberry8 1 Link to comment Share on other sites More sharing options...
jema Posted March 7, 2023 Share Posted March 7, 2023 pirms 12 stundām , strawberry8 teica: Radiotehnika MR-5201 oi šo brīnumu es trīs mēnešus prakses laikā montēju kopā, dīvains aparāts. Link to comment Share on other sites More sharing options...
strawberry8 Posted March 7, 2023 Author Share Posted March 7, 2023 divaini ka tonkorekcijas platei izejas pretestiba 4.7kΩ. jaudas pastiprinataja ieejas pretestiba noteikti nav konstanta nesaku ka nevar plashu priekspastiprinataju uz tranzistoriem bet 3gab ir domat par maz Link to comment Share on other sites More sharing options...
noname Posted March 7, 2023 Share Posted March 7, 2023 7 hours ago, strawberry8 said: nesaku ka nevar plashu priekspastiprinataju uz tranzistoriem bet 3gab ir domat par maz 1 Link to comment Share on other sites More sharing options...
osscar Posted March 7, 2023 Share Posted March 7, 2023 Mm nav par maz..pat ar 2 pietiek Bezvārdis atrāk..nekā es ge soaidu pixeli Ja runa par krievu tiltiem diožu..vissudīgakie tie brunie un tie pelēkie plaknie....tie ģībst no luelas starta strāvas....sitas lielas diodes un mazās plakanās sarkanas ir ok...importa 6A msxie melnie klucīši..mierīgi tur 50 000uf...startā mazās lsika sprīdī tie tur 100+A..gan jau arī šis kruevu diodes tur to pašu Sory par kļūdām...lieli pirksti Link to comment Share on other sites More sharing options...
strawberry8 Posted March 7, 2023 Author Share Posted March 7, 2023 ar vienu ari var bet kads tur audiophile hvz radiotehnika transformatora sekundara tinuma pretestiba ~350mΩ. kondensatora uzlabojums pec simulacijas dod ~+25% amplitudu. Link to comment Share on other sites More sharing options...
inteens Posted March 7, 2023 Share Posted March 7, 2023 6.03.2023. , 17:55, strawberry8 teica: UIV bloka iznemti 3 kondensatori lai butu 88..98MHz diapazons Kolhozs.. stereodekoderis arī jāpārtaisa, lai pa smuko. Link to comment Share on other sites More sharing options...
jema Posted March 7, 2023 Share Posted March 7, 2023 RRR ražoja moduli arī priekš eiropas, uz ārzemēm gāja jau pareizais diapazons Link to comment Share on other sites More sharing options...
inteens Posted March 7, 2023 Share Posted March 7, 2023 (edited) Bija jau..šo aparātu neesmu varojis, vai tur pietika ar prastu pārspraušanu. UĪV arī bija gatavs eirovariants, tikai kur šos tagad raut, Latgalītes ziedu laiki beigušies. Edited March 7, 2023 by inteens Link to comment Share on other sites More sharing options...
noname Posted March 7, 2023 Share Posted March 7, 2023 47 minutes ago, strawberry8 said: ar vienu ari var bet kads tur audiophile hvz Nu gribēt no MR-5201 dabūt ko līdzīgu arī ir visai apšaubāms pasākums... Link to comment Share on other sites More sharing options...
strawberry8 Posted March 7, 2023 Author Share Posted March 7, 2023 var redzet iekshas kursh aparats nosperts no exporta plaukta. parejie ir salasiti no parpalikuma, skiba shasija pielagota utt capacitates diodes jamaina lai diapazons 2x plataks. stereo laikam atskiras nesejfrekvence pa smuko radio vajadzetu noregulet bet nav visu HF generatoru SA utt 7 minutes ago, noname said: Nu gribēt no MR-5201 dabūt ko līdzīgu arī ir visai apšaubāms pasākums... ja grib var highend tuningu bet vieglak ko jaunu kostruet Link to comment Share on other sites More sharing options...
inteens Posted March 7, 2023 Share Posted March 7, 2023 Tas jau vairāk kā hobijs, tādu restaurēt. Vai tā oriģinālā viniladata nebija no kategorijas ''plašu nāve'' Link to comment Share on other sites More sharing options...
noname Posted March 8, 2023 Share Posted March 8, 2023 (edited) 9 hours ago, strawberry8 said: ja grib var highend tuningu Tie iepriekšējie aparāti smuki sakopti, visu cieņu, bet šitādas idejas gan lūdzu izmet no galvas. Edited March 8, 2023 by noname 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