| maynardg |
I just finished a 6SN7 SRPP preamp. My question is: What is the cause of a soft whispery, rustling leaves, wind in the trees sound?
I have not heard it before. Ideas appreciated.
Thank you.
MG:confused: |
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| wd40 |
| Is living I the copy also possess the same appearance on MATTSSE Preamp , I also want to realize the reason .It is one kind of very slight ' Si ' voice ? :scratch: |
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| jean-paul |
| Could it be that it picks up radio signals ? Please post a schematic, it'll make things probably clearer. |
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| Paul Barker |
| oxidation on valve base/pins dry joints. |
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| Sch3mat1c |
Hmmm... I think I've heard that before in Frankenhouse... lemme see if I can find the faulty 6U8 that did it...
That one's not it... although the triode section is missing the heater... I wonder how the heck that one got past QC! :eek:
Ah, here it is! Lemme get out the mic...
Damn! Now it doesn't want to do it... argh...
Hey, it's working now! I'll try editing the sound bite a bit and see what I can do...
Tim |
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| 316a |
| quote: | Originally posted by maynardg
I'll try again. |
Hello ,
This could be due to internal leakage or heater to cathode insulation . Are you using the same tube for both voltage amp and SRPP load ? If so it may be advisable either to float the heater at half B+ or to use separate tubes : one for voltage amp (heaters ref'd to 0V), one for SRPP (heaters ref'd to half B+) . Some tubes are better than others with regards to internal leakage , you could always try other tubes which may be a quick fix . Hope this helps :)
316a |
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| ShiFtY |
| I agree, try referencing your heaters at 100V, (obviously disconnect them from ground first!) |
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| Raj1 |
Hi,
I accidently caused a short on the 317t that supplies 2.78 volts to 2 3a5 filaments, the short was due to a solder blob. I was bypassing the adj resistor to improve the performance of the reg. Unfortunatley I onlty noticed I had done this when the tubes were glowing bright red.....
I have fixed the problem, but I am now getting a rustling sound. I have checked joints etc, could it be that the tubes are now damaged, as they worked fine before the short........
Thanks
Raja |
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