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Everything posted by jose
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[emoji23] [emoji23] [emoji23] [emoji23] Oh.... someone stole my headbar basked and my ring !!!!!! Jajajaja
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ta ta ta chan!!!!!! Dura Ace 9000 (50/34) is 88 grams lighter than Ultegra 6800 (52/36) My next step: a pair of DT Swiss RS28 SPLine
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Thanks Sorenb
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i'm guilty... I bought this beautify
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Thanks guys. I don´t know if my Ultegra Di2 will have problems with the different rings and the ramps between them. My ideal will be 52/34 but this is the problem: The 52 ring doesn't like the 34 ring. The price of an Ultegra 6800 (50/34) is around 155€ and the Dura Ace 9000 (50/34) is 344€. Is a big difference. I need time for thinking about this.
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Thanks. It´s the problem of the Shimano bottom bracket. You can´t change the ring. You can change the rings but only with certain combinations for example, you can´t put a 34 with a 52. On my case, if I buy the dura-ace 9000 I will have two bottom bracket (DA 32/50 and Ultegra 36/52) and I would change. (Change the bottom bracket no the rings)
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Guys, I´m thinking change my Ultegra 6800 36/52 by a Dura-Ace 9000 34/50. Yes, I know that the new Dura-Ace is here, and the ultegra versión is more cheaper but 9000 versión has a good price now and I need change... my 36/52 is great for flat stages or médium mountain but here we have steep ramps and sometimes I suffer a lot with this development. (rear I used a ultegra 11/32) Ok, I know that a 36/52 with 11/32 is "similar" to 34/50 with 11/28 but the "feeling" on long mountain pass is very, very different. What do you think?
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A stupid thing... or not. If the problem is the floor connector, Why you don´t use a thermal silicone (same that we used between headsink and trasistors) but between the connector and the pcb? You only need to make the holes on the silicone.
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No problem Soren. I bought the Kemet on Mouser at 30€/ea . Less than that is a fantastic price.
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Ok, I know my amps are not very pretty , but I like the simple front. I made the 20mA versión so it need a big heatsinks
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12$/ea?
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My KGSSHV C is Alive!!!
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Thanks Sorenb. I´m interested.
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Today I could dedicate time to amp. It took me very little time regulate. The balance was 0~1 volt (derived a little between both values) and offset was 0~0,5volt (derived a little too).
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Thanks all Dr. Gilmore, What value recommended for HV?
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CT pin. I feel like a stupid . Spend two hours to review all and spend your time too
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Thanks guys. Yesterday I was until 2 AM checked the amps. All components is OK, correct solders, all conections OK. Finally, I moved the trafo wires and I saw something, when I moved it the led shine sometimes. I saw that the PSU socket was rare: I desoldered this piece and a pin on the socket base was broken. I don´t remember too tightly. I had had chinese sockets with this problem but not a Phoenix. So I turned on and all was OK. Leds shine, volt ok. I adjusted the current to 1 volt (20 mA) and then I went to sleep. Tonight I´m working with the balance and off set. Thanks for your patience.
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First start. I'm not lucky I have all VRs adjusted to mid point I turn on R channel; both leds shine. A second later, led arround PZTA56, don´t shine (+rail). Turn off the amp and the this led shine again!!! (until the capacitor discharges). The Led arround PZTA06 shine all time. Check Volt on + rail: 1,5 volt. Volt on - rail: -15 volt. No smoke or blown. L channel, it´s similar to R; the same led is shining and then stop.
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Ok, I´m ready to check it.
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I changed the LT1021-5 for LT1021-10. Now, psu it´s fine. HV: 402,5 volt. / -401,5 volt Bias, 578 volt. LV: 15,4 volt/ -15,1 volt. Thanks
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OK, but a balanced input is a good alternative... Imagine that in the future, you have a balanced source. You only need to spend a little time and very little money. Edit; My KGST has 3 unbalanced input and 1 balanced input
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Thanks!!!
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Thanks for your help guys. Yes it's 5 volt. I don't know why use this and I don't remember reading anything about. I ordered this on digikey. In any case, it's my fault and is quite easy to solve. So the correct is the 10 volt versión?
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I have a problem with the PSU. Started without load and grounds connected to safety earth. Trafo: 360volt AC x2 and PSU ready for 400 volt DC LV: OK; +15,1 volt and -15,4 volt. Bias: OK; 579 volt at the test point. HV: both sides +119 volt and -119 volt. I don´t see something wrong or blown. Any idea? What can be wrong?