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Re: Schema originale crossover Box 850-850a
Inviato: lun 4 giu 2018, 13:02
da M.Ambrosini
Riccardo ha scritto: ↑dom 3 giu 2018, 11:13
Buongiorno, grazie, Massimo,,gentilissimo. Ne deduco che stai un po' meglio, maggiore motricità.
Ho notato la grande qualità delle bobine grundig, sia del rocchetto che del nastro.....salta aglii occhi. La mia misura l'ho presa non con un tester, ma con un dispositivo multifunzione, cinese. Dotato sia di morsetti che di piazzole. Non ha puntali ed é auto-impostante.
P.s. La cosa strana é che l'aggeggio cinese misura le resistenze di precisione con grande accuratezza, per cui ci ho fatto affidamento.
Chip: Atmega328
* Resistenza: 0.1 ohm risoluzione, massima 50 M ohm
* Condensatore: 25pf -100,000 uf
* Induttore: 0.01 mh - 20 H
Fai la prova cortocircuitando i due terminali e vedi quanto indica
Re: Schema originale crossover Box 850-850a
Inviato: gio 5 mar 2020, 21:24
da starbender
I have a box 850 and its crossover is marked as 19310-455A. Inductor labels are different than the crossover schematic in this thread.
According to schematic;
DR1 016.01
DR2 014.01
DR3 020.01
DR4 014.01
My 850 crossover inductors labelled as;
DR1 007.01
DR2 014.01
DR3 013.01
DR4 013.01
Any idea why? Or is it possible to be my crossovers are not for box 850?
Re: Schema originale crossover Box 850-850a
Inviato: ven 6 mar 2020, 7:26
da M.Ambrosini
starbender ha scritto: ↑gio 5 mar 2020, 21:24
I have a box 850 and its crossover is marked as 19310-455A. Inductor labels are different than the crossover schematic in this thread.
According to schematic;
DR1 016.01
DR2 014.01
DR3 020.01
DR4 014.01
My 850 crossover inductors labelled as;
DR1 007.01
DR2 014.01
DR3 013.01
DR4 013.01
Any idea why? Or is it possible to be my crossovers are not for box 850?
The pcb code of 850a-1500a is 19310-455B but it's used also with others crossover type. Your speakers are 850, 850 prof or 850a prof ?
The pcb code of 650 prof it seems to me the yours, but (in box 650) Dr4 is the same of Dr2= 014.01, Dr3=013.01 and Dr1 is 012.01
Have both crossovers been tampered with?
Re: Schema originale crossover Box 850-850a
Inviato: ven 6 mar 2020, 9:58
da starbender
My speakers are box 850. It has no fancy flanges or marks on front baffle.
Both crossovers are the same.
I have several Grundig speakers; box 550,650,850,306,sl1000a.
I have suspicions about this 850, because somehow bass is stronger in 550 and 650, but 850 bass response is poor.
I checked Dr1 again, it's 007.01 in my box 850.
Re: Schema originale crossover Box 850-850a
Inviato: ven 6 mar 2020, 13:25
da M.Ambrosini
starbender ha scritto: ↑ven 6 mar 2020, 9:58
My speakers are box 850. It has no fancy flanges or marks on front baffle.
Both crossovers are the same.
I have several Grundig speakers; box 550,650,850,306,sl1000a.
I have suspicions about this 850, because somehow bass is stronger in 550 and 650, but 850 bass response is poor.
I checked Dr1 again, it's 007.01 in my box 850.
Sorry...you have a not original crossover
Re: Schema originale crossover Box 850-850a
Inviato: ven 6 mar 2020, 15:21
da starbender
That was my suspicion too.
Luckily I found a set of crossover locally and inductor labels matches the schematic.