I like the protection cage for the 300B.
the most protection cage ever madeThe sides of the amp will be covered with oak wood, but basically the amp works perfectly and I've already done some auditions with it
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The amplifier is completed and the last harmonic distribution measurements with fundamental frequencies at 100Hz, 1Khz and 10Khz in addition oscillograms with SQW signal at 20 Hz, 30 Hz and 10 Khz. All measurements are made at a sine output power of 7w
Attachments
The sockets for the 300b are recovered from an old PP amplifier with OT100 and despite their age are more robust than the one found now. I monitor the current and anode voltage in both channels by successive switching with simple milliammeters also obtained from recoveries
Hi,
Tested power supply PCB but seams heat sinks are under necessary requirements . Have ordered a second PCB's revisited rev.1.1 , split in two boards , one for HV and negative voltage , the second one for filament supply of 300B .
Beautiful sound , next step to do some measurements and the case .
Tested power supply PCB but seams heat sinks are under necessary requirements . Have ordered a second PCB's revisited rev.1.1 , split in two boards , one for HV and negative voltage , the second one for filament supply of 300B .
Beautiful sound , next step to do some measurements and the case .
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