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Old 10th April 2011, 11:52 PM   #1
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Default need help with frist tube amp

I sent this email to the original builder of this amp but no word back yet. It is a oddwatt 225 . Iam useing 35watt output transformers and KT77 and 6SL7 but need some values . So here is the email I sent

.ExternalClass .ecxhmmessage P{padding:0px;}.ExternalClass body.ecxhmmessage{font-size:10pt;font-family:Tahoma;} I like your amp and building one with some one who knows what their are doing. Well TV repair man tubestyle . I had changed it a little I used 35wat output transformersand useded KT77 and 6sl7GTtubes . I need to know what some of the wattages and voltages are


1. 0.003uf voltage ?
2. 150R wattage ?
3. 1.5m wattage?
4. 0.01uf voltage ?
5. 1uf x3 voltage?
6. 10,000uf voltage?
7. 100k ohm resistor x2 wattage?
8. 200k ohm wattage?
9. 1000uf voltage?
10. 4.7k x2 wattage ?
11. 0.001uf voltage?
12. 1k wattage ?
13. 10R wattage?
14. 1R x2 wattage?
15. 25R wattage?
16. 47uf voltage?
17. 1.2k wattage?
18. 470k wattage?
19. 0.33uf voltage?
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Old 11th April 2011, 12:28 AM   #2
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These are the ratings I would use based on below schematic. Capacitor voltages could be higher as that's not critical.

OddWatt 6SL7 SRPP / KT77 Push-Pull Class-A Ultra-Linear DIY Tube Amplifier

1. 0.003uf voltage ? (.03/400v) (don't see a .003)

2. 150R wattage ? (W) (I don't really like this resistor being there.)

3. 1.5m wattage? (W)

4. 0.01uf voltage ? (400V)

5. 1uf x3 voltage? (350V or better)

6. 10,000uf voltage? (25V or better)

7. 100k ohm resistor x2 wattage? (W)

8. 200k ohm wattage? (W)

9. 1000uf voltage? (50V)

10. 4.7k x2 wattage ? (1W plate & W feedback)

11. 0.001uf voltage? (250V)

12. 1k wattage ? (1W)

13. 10R wattage? (W)

14. 1R x2 wattage? (W)

15. 25R wattage? (2W or better) (wire wound)

16. 47uf voltage? (350V)

17. 1.2k wattage? (1W)

18. 470k wattage? (W)

19. 0.33uf voltage? (400V)
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Last edited by HollowState; 11th April 2011 at 12:37 AM.
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