[Amps] Harris RF-110A AM-3924

[Paul Decker]

Hello group.

I'm getting ready to bring a 40+ year old RF-110A online. I kept the low voltage portion intact for the filiment, bias, and the 400 Hz chopper to the lower.   I've gutted the old 3phase power supply and replaced the 575v screen and 2500v plate transformer with a single phase version.

My plan is to check blower function, then

Step 1. apply filiment without any 2500v plate or 500v gird.

This should keep both the 4cx1500b's and the 8122 plate and grid voltage off and just run filiment for 24 hours or so.

Step 2. With filiment, apply 500v grid to the 4cx1500's but no plate,  and 500 v plate to the 8122's  let that soak for a while,

Step 3. Apply half plate voltage about 1200v to the 4cx1500's let that soak.

Step 4. Apply full plate and let soak.

Step 5. Run through the amplifier setup and alignment steps in the URT-23 manual. 

I've never done a tetrode bring up, so I wonder if it is okay to have grid without plate or vice versa, no input signal would be applied during the burn in process.

Thoughts? 

Thanks,
Paul
Kg7hf