Vintage Heathkit SB - 401 HF Transmitter Ham Radio Tubes Light Up No Power Out

For sale is a used Vintage Heathkit SB-401 HF Transmitter Ham Radio. Sold for parts or repair. Has a switch mod don't know anything about the mod. No screws or feet for the case. Case in good condition for age. Have plugged the radio in the tubes light up but no power out on CW. The underneath looks like a very nice assembly job. With meter switch on Hv the meter reads 800  . Thanks, W8HOG Jerry
Storage: 1011BR