spritzer Posted December 31, 2007 Report Share Posted December 31, 2007 It's an EL54 so similar to the 34 but not the same. Might work in the ES-1 but the BH would have to be modified. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted December 31, 2007 Author Report Share Posted December 31, 2007 Elephas: I can check it out for you if I can get a pin out of the adapters. Also, remember that the BH connects the the cathode to G3 (suppressor grid)... personally, I wouldn't plug anything in until someone looked at the datasheet and the proposed pin out. Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted December 31, 2007 Report Share Posted December 31, 2007 KG: Is it possible to put two IXCP10M45S in series and get double the current, but the same voltage rating as a single IXCP10M90S? I don't see why not, but figured I'd ask. You would put 2 of them in parallel, not in series. In parallel with suitable heatsinking you can get to about 100ma. You could put 2 in series to get twice the voltage swing (say 1800 volts) but then there are going to be voltage breakdown issues and they have to be heatsinked very carefully and probably with berylliumoxide insulating washers. (which are toxic if not handled right) Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted December 31, 2007 Author Report Share Posted December 31, 2007 You would put 2 of them in parallel, not in series. In parallel with suitable heatsinking you can get to about 100ma. You could put 2 in series to get twice the voltage swing (say 1800 volts) but then there are going to be voltage breakdown issues and they have to be heatsinked very carefully and probably with berylliumoxide insulating washers. (which are toxic if not handled right) I wasn't going to get that extreme! I was just going to buy a bunch of the 450v and put them in series and stick them on 500-550v rails, instead of buying the 900v parts. So, 10m45s 2 in series * 2 per board * 2 boards with 500-550v rails. Looking at the 10m90s datasheet, it seems that you can get 100mA per device, so would sticking them in parallel get up to 200mA total? or is this one of those things that the datasheet doesn't tell you, i.e. 50mA per device is what you can get in the real world? Looking at the 10m45s graph on the last page, it seems that you can get over 100mA per device, like in the 400mA range, but at the top of the spec sheet it clearly lists 100mA... any idea which is correct? of course, all of this is assuming lots of heatsinking thanks again! Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted January 1, 2008 Author Report Share Posted January 1, 2008 ... and one other question. By upping the +- 400v rails, do I need to make sure I change the components required to keep the 300v, 350v, and 380v reference voltages on the schematic, or will these values become -100V, -50V, and -20V with respect to the new rail voltage? Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted January 1, 2008 Report Share Posted January 1, 2008 Buy the 900 volt parts. Really. You should not run them at more than 50ma each. You can try the 450v parts, I have not tried this. Getting 3 of them in series to correctly voltage share might be tricky. If you raise the voltage rails past +/-400 you have to change out the 2sa1156 with a 2sa1486. Then you can probably go to +/-550. Everything else references the two rails, so there should be no other changes. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted January 21, 2008 Author Report Share Posted January 21, 2008 The project is coming along slowly. I just sent off the plans for the case. I'm going to try out the new case option at Front Panel Express. I'm going to try and cram things in a 42mm high enclosure, with the heat sinks and tubes top mounted. If that doesn't work, then I'll go for the larger 56mm option, which will definitely work with no problems. Since I hadn't decided about this, I didn't order the front and rear panels this time around. I'm getting a sample of the blue colored material from FPE as well, perhaps I'll go with that for the front panel. I'll post pics once the case gets here Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted January 28, 2008 Author Report Share Posted January 28, 2008 Kevin: Are there any decent subs for the 2sj79 and 2sk216 parts? I'm assuming the benefit of these parts are the low capacitances? Are the lower voltage versions possible substitutes? Any subs that use the higher rated case like the 2sa1968 to avoid heat sinking these parts, perhaps 2SJ313 and 2SK2013? I guess I don't really have a good reason for asking these questions, just curious... Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted February 19, 2008 Author Report Share Posted February 19, 2008 [img width=150 height=113 alt=P1010236]http://www.head-case.org/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=1494&g2_serialNumber=2&g2_GALLERYSID=bb4f68f8f9ee575f1b358536d1e7f287 Quote Link to comment Share on other sites More sharing options...
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