March 30, 201412 yr comment_629672 and I do not think they will fit the board. Maybe the 8 pin sockets can be made to fit, but not the 9 pin. Report
March 30, 201412 yr comment_629683 Yes the 9pin ones I got fit the board ok. I was just wondering ifthey were that much inferior.Les Report
March 30, 201412 yr Author comment_629692 It really depends on the contacts and their quality. I suspect they are the same as the teflon units so you should be fine. That's assuming you are referring to something like this: http://www.ebay.com/itm/1pc-9pin-Ceramic-Tube-Socket-Machine-Made-Gold-Pin-for-12AX7-EL84-6922-New-/130674502828?pt=Vintage_Electronics_R2&hash=item1e6cceacac Report
March 30, 201412 yr comment_629703 looks like the same pins as the teflon sockets, so if that is what you got it should be ok for both sockets Report
April 3, 201412 yr comment_630098 After looking at quotes for individual boards, I'm beginning to understand the concept of a group buy. Any chance anyone has a spare amp board or power board they'd be willing to sell? Pm me if you're willing to sell. Report
April 3, 201412 yr Author comment_630161 I will be ordering amp boards soon but I'll need to make a new version first. It needs some changes... Report
April 3, 201412 yr comment_630172 I will be ordering amp boards soon but I'll need to make a new version first. It needs some changes... Perhaps add a bit more rail capacitance and holes next to the power supply pads for probe points. I would also space the test point locations out a bit. Yeah there are probably lots of little things here and there. Report
April 3, 201412 yr comment_630178 @spritzer Have you decided which materials/stats you'll be using for this go-around (FR-4 vs CLTE, .062" vs .125", ENIG vs ENEPIG vs whatever, 2 oz vs 4 oz, # of layers, etc.), or is it that thinking too far in advance? Report
April 3, 201412 yr Author comment_630189 FR4 and 4oz like the original test boards. Only two layers on all of our amps... Perhaps add a bit more rail capacitance and holes next to the power supply pads for probe points. I would also space the test point locations out a bit. Yeah there are probably lots of little things here and there. That's the general idea, fix those small issues such as a proper way to do the test pads, redo the input a bit to suit my particular needs (hello loopouts) and the like. Report
April 4, 201412 yr comment_630421 Had anyone received the chassis from Lil Knight yet? Can you share a pic or 2? Report
April 15, 201412 yr comment_631908 I guess not? Guess not. It will be nice to get an update from Tran. Report
April 17, 201412 yr comment_632104 Just in case. http://www.tempoelectric.com/azl_sale.htm this guy has some interesting things (mostly audio related) for sale at fairly low price... definitely worth checking out. Audio Sale of Items From the Estate of Dr. Arthur Loesch (Part 2) All prices + shipping from Troy, NY 12180 Updated April 17, 2014 (...) TEST & OTHER EQUIPMENT: 382 (2) Acopian Regulated Power Supplies Model B35GT50. Output: 35V @ 50mA 50.00 Each 383 Acopian Dual Output Power Supply Model 150GT10D-150GT10D. Output 150 VDC x 2 sections @ 0.1A 95.00 384 Altec Lansing Model 536A Power Supply Output: 20VDC @ 400mA 20.00 385 Cenco DC Amp Meter 0-5 Amp Range 10.00 386 Eico 379 Sine/Square Wave Generator 25.00 387 Eico 1078 Variable AC Supply With Volt/Amp Meter 55.00 388 (2) GenRad 1201-C Regulated Power Supplies Includes Manual. 240V-340V Regulated mono power supplies, perfect for building an Arthur Loesch-style phono preamp. 75.00 Each 389 (2) GenRad 1206-B Amplifiers Includes schematics 20.00 Each 391 GenRad 1217-C Pulse Generator Includes 1203-A Power Supply and Manual for the 1217-C 40.00 392 GenRad Model 1900 Wave Analyzer VG+. Presumed to be in good working condition. 60 lbs. Net Weight, Pick-up preferred 75.00 393 GenRad Variac Variable AC Transformer; 0-130V AC Range 75.00 395 Heathkit IM-38 VTVM Vacuum Tube Voltmeter Includes a Decibel Meter scale 25.00 397 HP 450A Amplifier 45.00 399 Radio Shack 42-3019 Sound Level Meter Includes soft case and original manual. 10.00 400 Rex 423 4-Range Rheostat 35.00 401 Simpson 2785 Impedance Bridge Manual included. 35.00 402 Simpson 1699 Milliohm Meter 40.00 403 Simpson Model 885 Sound Level Meter Includes the calibratiion tool, case, and original manuals. 75.00 404 Staco High Voltage DC Power Supply 40.00 406 Tektronix 575 Transistor Curve Tracer VG+. Presumed to be in good working condition. 70 lbs. Net Weight, Pick-up preferred 75.00 Edited April 17, 201412 yr by jgazal Report
April 21, 201412 yr comment_632582 if you look at the insides of the original, the 22k resistor was mounted on the backside about .5 inch from the board so that you could put clipleads on it to adjust. Kevin/Birgir: do you have a pic to confirm this? Sure it's not the 62K resistor? I suppose either could work, just curious. Also any chance you know the voltage across R73 in the original? It's the 6.2K resistor at the base of the Darlington in the servo... Report
April 21, 201412 yr comment_632586 Looks like red-red-black-red-brown = 22K 1%. Ok. Still interested in other question though... Report
April 21, 201412 yr Author comment_632624 We might have measured it at some time but this was 5 years ago. Report
April 24, 201412 yr comment_633015 A few people have asked about the angle brackets. But I don't have any more. But the don needs some. So I will make some more. If anyone is interested let me know. Probably going to be about $140 for the set of 4 given what the price was, and what the new hourly rate for the machine is. Plus shipping. Will get an exact price on Monday. These will be for the original boards, not the shrunk one I did for lil-knight. Edited April 24, 201412 yr by kevin gilmore Report
April 25, 201412 yr comment_633058 this is just the angle brackets, and for the boards that are 16 inches long. lil-knight has a board layout that is 15.65 inches long that fits his chassis. so the brackets I will be making are for the 16 inch board. will see about the other version later. so far 4 sets are spoken for. Report
April 25, 201412 yr comment_633059 I understood the distinction, I was just thinking that if we spun our own T2 boards (the older version) this would allow some flexibility in heatsink/case choices Report
April 25, 201412 yr Author comment_633070 The current board just about fits a Modushop Pesante Dissipante chassis... Report
April 25, 201412 yr comment_633095 If it's not tied to the original case, I would try to get more of the device case on the flange. IMHO the old design there is a 1/8" or so of the case off the edge. Report
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