My mono power amps a 2a3 driver 1:2 interstage coupled to a 300b has the following power supply:
I want to now if this is a good stable supply or that there are improvements
its a CLCLC supply
for the for the 2a3/ 5r4 2uf 10H 47uF 10H 47uF opt.
the chokes are 96 Ohm
for the 300b the same supply also with his own 5r4 rectifier
the 2a3 has a ct 290v winding on the transformer /anode 288v dc running at 57mA /14 Watt
and the 300b a ct 450v /anode 471v dc running at 93 mA /34 Watt
The amps are totally quiet
but sometimes if the amps a few hours on i here a sort of motor boating a very low freq but only for 4 or 5 seconds
and then it is away for sometimes one hour or 10 minutes its not loud but i can feel it
also.
i can't dowload the psu designer on my Apple
and if i never work with it
can someone tell me if the supply is stable ?
i checked the tubes already it are not the tubes.
i must say today i listening a few hours to the amps and the strange noise was not there
hope some one can help me with this question.
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Topic - power supply question who can help me ? - horny 15:24:52 03/10/15 (10)
- RE: power supply question who can help me ? - Caucasian Blackplate 21:30:58 03/10/15 (0)
- 2A3 Driver Stage , PSUD2 - drlowmu 21:28:31 03/10/15 (5)
- RE: 2A3 Driver Stage , PSUD2 - SeanMiddleton99 08:06:52 03/18/15 (0)
- RE: 2A3 Driver Stage , PSUD2 - horny 10:14:13 03/11/15 (3)
- RE: 2A3 Driver Stage , PSUD2 - drlowmu 11:10:16 03/11/15 (2)
- RE: 2A3 Driver Stage , PSUD2 - horny 13:03:43 03/11/15 (1)
- RE: 2A3 Driver Stage , PSUD2 - drlowmu 13:49:43 03/11/15 (0)
- RE: power supply question who can help me ? - Al Noakes 16:46:38 03/10/15 (0)
- RE: power supply question who can help me ? - danlaudionut 16:16:34 03/10/15 (1)
- RE: power supply question who can help me ? - horny 13:10:50 03/11/15 (0)