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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: RE: OK.... posted by frankford on March 5, 2012 at 14:55:40:
Are the 6550s filaments in series or parallel? It sounds like you have them in series? Both tubes pin 7 and both pin 2 should be connected together. The pin 7 side to the resistor, the pin 2 side directly to the transformer.OR
You can criss cross the filament pins between the tubes as shown on the schematic. My guess is they did this for hum cancellation.
Take the 6550 tubes out. You should measure approx 6-7 volts between pins 2 & 7 on each socket. The measure again with only one tube plugged in, then with both 6550s in. Tell us what you get in each step.
Edits: 03/05/12 03/05/12
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Follow Ups
- 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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