Operation

Dayton Blower Sound Level

Here are a couple of sound-measurements, for context. I used the NIOSH iOS app:

• 30S-1 with Dayton 3,000rpm motor change: 59 dB(A) 1-meter directly in front
• Listening to HF Radio, SSB voice: 65 dB(A) for my preferred Sound Level
• My living-room is a blissful 36 dB(A)

Video showing Dayton Blower Start-up Sound

Dial Lights After Warm-Up

The 30S-1 amplifier was designed with a 3-min delay before allowing High Voltage on the tube - the Eimac datasheet specifies at least this long. Mine is closer to 2-1/2 minutes, so I must pause before pushing the "ON" button. To let me know when this time-delay has completed, I re-wired my dial-lights to the DC circuit which is down-wind of the thermal delay-timer:

• remove the hot lead from lamp socket DS201
• Add a new lead from DS201 to the white-red-orange-green wire at the rear of the HV "OFF" switch, S208 (either contact)

Here is a 10-second video clip showing the dial-lights illuminating, after the time-delay:

Video showing Dial Lights after Warm-Up