5/6/2023 0 Comments Gk backline 600![]() ![]() Please post the fan specs, it must have a small label, stating "24VDC" and either "xx W" or "yy mA", either is enough to calculate a resistor value which allows just max rated current (or say, 10% more, which is reasonable), then we find which resistor drops (58-24)V at that current and how much it dissipates. It will NOT affect operation in the least, since Q28 is a current source, but guarantees that worst case the fan passes the safe current and no more. I would calculate the proper value and add a current limiting ceramic resistor (might be chassis mounted) in series with the fan itself. ![]() If Zener D18 opens (or any track/solder/connector in its path), nothing stops the fan from receiving up to 60V DC with unlimited current. GALLIEN-KRUEGER Backline 100 gallienkruegerbackline100service. It´s fully dependent on all parts working well or it will NUKE the fan. GALLIEN-KRUEGER gallienkruegerbl250210350115600preamp2060181.pdf: 3660 kB: 74: GALLIEN-KRUEGER: gallien krueger bl250 210 350 115 600 preamp 206 0181. I don´t like that circuit, it´s not fail safe by any means and not what others (me included) would use. There is however a small fan on top of security of the amp which gets under way in the event of poor ventilation. Full transistor amp, it heats well, and all the passive ventilation. I ordered the fan from GK, a 24VDC direct replacementThanks. So 180W in normal use and if we add another cab, we go a 300W. Item location: Southbridge, Massachusetts, United States. Last updated on 13 Mar, 2023 00:05:07 AEDST View all revisions View all revisions. My main rig is a 600-watt Eden head with a couple of 4x10 speaker cabs so its heavy. Seller assumes all responsibility for this listing. ![]() The full schematic is on my computer at work. I bought a new GK Backline 210 a few years ago when they came out (paid 250) as a backup and for smaller gigs. Here is a snapshot of the fan 44245supply section. ![]()
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