Voltron Posted April 22, 2009 Report Posted April 22, 2009 Thanks for helping out my robot bro SuperAMB!
Smeggy Posted April 22, 2009 Author Report Posted April 22, 2009 Cheers guys! I have the sigma out of the cast for testing and repairs, should I order a matching set of 4 resistors? I don't know what brand the blown ones are. I don't suppose it matters too much but I'd prefer to remove as few components as I can.
naamanf Posted April 22, 2009 Report Posted April 22, 2009 Looks like Xicons. Mouser #282-0.47-RC. Always good to have extras around.
Pars Posted April 22, 2009 Report Posted April 22, 2009 Like Naaman says. And these don't need to be matched.
Smeggy Posted April 22, 2009 Author Report Posted April 22, 2009 thanks, will get the orderved post-haste.. with spares
guzziguy Posted April 22, 2009 Report Posted April 22, 2009 thanks, will get the orderved post-haste.. with spares The biggest cost of your order will probably be the shipping. I suggest that you look at the BOM and also order spares for other potentially damaged parts while you are at it. Buying parts as you need them is cost prohibitive.
Smeggy Posted April 22, 2009 Author Report Posted April 22, 2009 I was gonna ask about that but have no idea what I might potentially need.
n_maher Posted April 22, 2009 Report Posted April 22, 2009 Gary, It's also critical to ask the question as to why these resistors failed unless you fancy hooking the power supply up again for rinse/repeat/poof.
Smeggy Posted April 22, 2009 Author Report Posted April 22, 2009 heh, I have no idea why they failed aside from me maybe tweaking the trimpots wrongly and cooking something so rinse/repeat is all I can think of right now. On another matter of the Beta, If I wanted to route the speaker signal to a couple of different devices internally (stax, sony transfo boxes and XLR for K1000) can I use 4 pin XLRs to swap speaker outputs? So.. Binding post bananas to XLR male > Fem XLR 1,2,3 on the back > Stax, Sony and Front panel XLR phones or are XLRs not rated for the 18wpc these dish out.
dBel84 Posted April 23, 2009 Report Posted April 23, 2009 On another matter of the Beta, If I wanted to route the speaker signal to a couple of different devices internally (stax, sony transfo boxes and XLR for K1000) can I use 4 pin XLRs to swap speaker outputs? So.. Binding post bananas to XLR male > Fem XLR 1,2,3 on the back > Stax, Sony and Front panel XLR phones or are XLRs not rated for the 18wpc these dish out. sounds reasonable but i would recommend a switch between the HP and speaker so that you don't have to unplug speakers to listen unless of course 90% of the time this will be your headphone amp ..dB
HeadphoneAddict Posted April 23, 2009 Report Posted April 23, 2009 heh, I have no idea why they failed aside from me maybe tweaking the trimpots wrongly and cooking something so rinse/repeat is all I can think of right now. On another matter of the Beta, If I wanted to route the speaker signal to a couple of different devices internally (stax, sony transfo boxes and XLR for K1000) can I use 4 pin XLRs to swap speaker outputs? So.. Binding post bananas to XLR male > Fem XLR 1,2,3 on the back > Stax, Sony and Front panel XLR phones or are XLRs not rated for the 18wpc these dish out. That's why I ended up ordering the Eddie Current ZDT - can drive my Stax transformer and K1000 and headphones.
Smeggy Posted April 23, 2009 Author Report Posted April 23, 2009 Yeah, it's all going to be headphones but a number of them require speaker power. It will not be used with actual speakers. Front panel normal phones, hi-power XLR and two 'stat transformers. I don't see any reason the XLRs wouldn't be fine for this but wanted to be sure I wasn't missing something like I have before.
Guest sachu Posted April 23, 2009 Report Posted April 23, 2009 smeggy received information on the transformer..sending to you.
Smeggy Posted April 23, 2009 Author Report Posted April 23, 2009 (edited) Thankee kindly dear sir Just looked, seems we (you) got it right first time That big-ass toroid only just squeezed in that case, it's a very tight fit. One more mm and I wouldn't be able to close the lid! Edited April 23, 2009 by Smeggy
Pars Posted April 23, 2009 Report Posted April 23, 2009 Thankee kindly dear sir Just looked, seems we (you) got it right first time That big-ass toroid only just squeezed in that case, it's a very tight fit. One more mm and I wouldn't be able to close the lid! You will need to be very careful with the mounting bolt if it is that tight, as contact with the case on both ends of the bolt will result in a shorted turn... something you definitely do not want.
Smeggy Posted April 23, 2009 Author Report Posted April 23, 2009 Hmm, didn't know that. It's not touching the top plate but only just. Is it ok to use a sheet of something over the bolt/washer to prevent metal contact? Sticky back vinyl damping sheet for nstance just as a layer of safety?
spritzer Posted April 23, 2009 Report Posted April 23, 2009 You will need to be very careful with the mounting bolt if it is that tight, as contact with the case on both ends of the bolt will result in a shorted turn... something you definitely do not want. I fired a PSU doing that earlier this week so be careful!!
n_maher Posted April 23, 2009 Report Posted April 23, 2009 Hmm, didn't know that. It's not touching the top plate but only just. Is it ok to use a sheet of something over the bolt/washer to prevent metal contact? Sticky back vinyl damping sheet for nstance just as a layer of safety? It'd be a better idea to just drill a hole in the top cover of the case. It's a trafo enclosure, who gives a poo if it has a hole in the top?
Smeggy Posted April 23, 2009 Author Report Posted April 23, 2009 well the bolt/washer is like 3" across, so big fucking hole I'll come up with a plan involving a big hole... and some wood It's an ugly box anyway and could do with a pretty wood lid.
n_maher Posted April 23, 2009 Report Posted April 23, 2009 well the bolt/washer is like 3" across, so big fucking hole I'll come up with a plan involving a big hole... and some wood It's an ugly box anyway and could do with a pretty wood lid.Or you could just use the stock transformer for now.
Smeggy Posted April 23, 2009 Author Report Posted April 23, 2009 I also need to find a big board of sexy wood for the amp top. That's gonna be expensive..
Pars Posted April 23, 2009 Report Posted April 23, 2009 Or you could just use the stock transformer for now. But..... this one goes to 11...
n_maher Posted April 23, 2009 Report Posted April 23, 2009 But..... this one goes to 11... Based on the already charred power supply I'd suggest this amp could use a little less 11 for the time being.
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