giovanni56

Riparare il supporto della bobina mobile leggermente schiacciato sul bordo inferiore, ma abbastanza da sfregare nell'intercapedine d'aria e riformare la schiuma.

Giorgio, intendi la R da 2 ohm sul C da 100uF del woofer. Quella R ha una funzione "smorzante" e in pratica riduce lievemente la pendenza delle frequenze piu' alte di competenza del woofer ottenendo un incrocio piu' chiuso con il mid; togliendola modifichi acusticamente ed elettricamente l'incrocio woofer/mid diminuendo l'impedenza in un certo range di frequenze

Mms was detected by the added mass method. The weight of the moving crew I detected in an Ar 200003 woofer averaged about 68 gr ( cone, spider, coil and stand but without the suspension foam ring. As soon as I can I weigh everything together

T&S woofer AR 3700 alnico parameter list, woofer photos taken from the web

Pete B Posted 5 hours ago "" You say grille cloth, but do you mean to say the grille frame including the cloth?"" " That's right, the whole panel including the two overlapping fabrics.

TRI STAR 2000 Outstanding!!! I had them for more than 25 years in my listening room, spectacular, powerful articulate and deep bass, natural midrange and treble in right balance, excellent power handling, timbre and selectivity at the highest level. Mine as can be seen from the photos, were more elaborate than the originals, a sub formed of 25mm MDF panels, sand-filled cavity for a total wall thickness of 7.5cm, internal filters with 1.8mm copper coils, weight of the coils of the whole filter 8.5kg, weight of the sub box complete with components 130kg. Satellites formed of glued and screwed slats with central slatted turret for mid-high and tweeter, in volumes not used by RCF polyurethane mid-bass and dry sand in low, total weight of one satellite, complete with components 82kg. Crossover filters composed of air coils wound on Teflon spools and plexiglass side walls, PP Solen capacitors on satellite cells, and PP in oil on woofer branches, bypassed by paper and oil

In my opinion, it would be better to listen to the speakers with the original canvases installed, which are an integral part of the design and listening tuning, in fact, as can be seen from the measurements on Advent OLAs, the canvas has the function of linearizing the frequency response and optimizing the polar output; as on the Ar3 and LS3/5a and many other speakers. Green response with cloth, red without

I measured the inductances again with precision instrument

Toluene, used under fume hood and FFP3 mask

The aluminum coil holder tapping on the bottom plate curved and crawled on the air gap

Hoping to do a good thing

Where can I download the article on the Ar9? Thanks

The large 2500 nF electrolytic was replaced with several Mundorfs connected in parallel.

Questi sono gli Ar10p in cui ho reinstallato i woofer ripristinati e ho eseguito la manutenzione generale.

Unfortunately, it's true, they are all dangerous solvents and should be used with caution, protective clothing or outdoors.

Sometimes, ethyl alcohol is sufficient.

Toluene, Acetone, Nitrol Thinner, Paint Stripper

Woofer di recupero Ar200003, passato nelle mani di uno pseudo tecnico domenica, uno scempio. Rimosso il ciarpame che aveva imbrattato su tutto il cono, tolto la sospensione in gomma SR250 di diametro più stretto, ricondizionato i ragni, ricostruito i bordi del cono, ricostruito e installato i bordi di masonite sul cestello che ne fanno uno spessore per il corretto posizionamento della bobina sul traferro, (lo pseudotecnico l'aveva rimossa per installare la sospensione in gomma SR250), installato la schiuma idonea, ricalibrato i parametri del woofer, e' stato un lavoro estenuante, ma il risultato e le misure sono a mio parere molto buono.

There is a version (among the first produced), of Ar1ms with square tweeter magnet and low mid, both are marked Ar, do not seem Tonegen; as soon as I can post some photos.

L'Adcom GFA555 ha fusibili in vetro, quattro, interni al case sulle schede dei transistor finali, sono 6.3A, posti sui rami di alimentazione cc. Si attivano per sovraccarico e cortocircuito, ma anche per un guasto su un transistor driver o su un amplificatore di potenza. Se hai visto un lampo e un po' di fumo durante il guasto, significa che probabilmente si è bruciata una resistenza da 300 ohm 1/2 W sulla scheda di ingresso dell'amplificatore, ma potrebbe essere che un transistor finale si sia guastato.

Grazie a te, Giorgio, apprezzo molto i tuoi restauri e la tua competenza, un mio parere sono veramente ottimi lavori che esprimono la tua passione per il marchio Ar. Buonanotte!!

Hi Giorgio, I have always preferred to replace components with others with identical dielectric, and above all, I do not think it is useful to use plastic capacitors among other very expensive that are not in series with the signal, it might make sense for 50nF and 6nF but not for 150nF.