March 30, 201412 yr 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.
March 30, 201412 yr Yes the 9pin ones I got fit the board ok. I was just wondering ifthey were that much inferior.Les
March 30, 201412 yr Author 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
March 30, 201412 yr looks like the same pins as the teflon sockets, so if that is what you got it should be ok for both sockets
April 3, 201412 yr 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.
April 3, 201412 yr Author I will be ordering amp boards soon but I'll need to make a new version first. It needs some changes...
April 3, 201412 yr 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.
April 3, 201412 yr @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?
April 3, 201412 yr Author 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.
April 17, 201412 yr 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
April 21, 201412 yr 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...
April 21, 201412 yr Looks like red-red-black-red-brown = 22K 1%. Ok. Still interested in other question though...
April 24, 201412 yr 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
April 25, 201412 yr 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.
April 25, 201412 yr 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
April 25, 201412 yr Author The current board just about fits a Modushop Pesante Dissipante chassis...
April 25, 201412 yr 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.
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now