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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: OK.... posted by gusser on March 5, 2012 at 13:36:50:
So, I hooked up the heaters using the 7 vac per pictures from the building manual. I only got 3.3 acv with the tubes installed, 7.2 vac with them out. I measured the resistance across both tubes and they showed 1.1 ohms. I measured a second pair of 6550's from a VTL amp and they showed the same.
I went back and wired the heaters per schematic, high side to .68 ohms to pin 7 of one tube. I wired from pin 7 to other .68 ohm and left the resister to pin 2 of other 6550. I and ran a extra ground from the low side connecting pins 7 and 2. The ground was ran to the star ground that is on the power supply board. I had 8 ohm resisters on the opt terminals.
I decided to hook it back up to the speakers and run my ipod into it. It started up no problems but after a few minutes the left side died down and the right side died down a little bit. I decided to turn it off and go back in, I just start sweating so fast when I have it open and powered up. Thanks guys I think I am making progress.
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Follow Ups
- RE: OK.... - frankford 14:55:40 03/05/12 (18)
- RE: OK.... - gusser 15:12:36 03/05/12 (17)
- RE: OK.... - frankford 15:23:54 03/05/12 (16)
- Can you post a picture if the underside? - gusser 15:39:14 03/05/12 (15)
- RE: Can you post a picture if the underside? - frankford 17:20:52 03/05/12 (14)
- another pic - frankford 17:22:57 03/05/12 (13)
- Update on amp - frankford 15:05:07 04/07/12 (1)
- I'm done with it. - frankford 17:11:54 04/07/12 (0)
- RE: another pic - gusser 18:25:01 03/05/12 (1)
- Flux Removal - gusser 13:35:59 03/06/12 (0)
- RE: another pic - Tre' 17:39:07 03/05/12 (8)
- RE: another pic - frankford 17:47:07 03/05/12 (7)
- RE: another pic - Tre' 17:48:54 03/05/12 (6)
- quick question Tre' - frankford 18:06:27 03/05/12 (4)
- RE: quick question Tre' - Tre' 18:25:20 03/05/12 (3)
- RE: quick question Tre' - frankford 21:57:12 03/05/12 (2)
- RE: quick question Tre' - frankford 23:05:40 03/05/12 (1)
- RE: quick question Tre' - frankford 08:56:14 03/06/12 (0)
- RE: another pic - frankford 18:02:34 03/05/12 (0)
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