1995 nice, well built 4-1000 RF deck (bought it that way) married to a homebrew pair of 4-1000 modulators cathode driven with audio using a Precision Power PPI-300 audio power amp. The modulator tube sockets were fastened to angle stock garage door frame material within a 6 foot equipment rack. No covers. Almost killed the cat. Had those cheesy steel flush mount sockets used on Diathermy machines. Power supply was a pair of late BC-610 oil filled transformers in parallel with full wave bridge rectifier/swinging choke input. They could take it without hi-pot failure. B+ 5500 volts under load. Modulation transformer was surplus from a Raytheon RA-5. 1300 lbs. Used a pile of Wilcox military surplus chokes for modulation reactor. Over 200 uh in total. Got those and tons of other great heavy stuff cleaning out the basement of Atkinson and Smith in Eatontown NJ when Smitty finally pulled the plug. Used foot switch to switch TR and high voltage because a kindly old timer suggested that was safer than leaving B+ on and pinching tubes off. Never did get that working 100% but I sure could now. Made plenty of AM QSOs with it. Finally went to 833s and half the B+ because I kept running into mobiles. I desperately wanted to use that beast of a modulation transformer as it had a 1:1 ratio. Took it apart a year later and moved on to modifying rice boxes for AM and linear amplifiers. 1993 Second craziest kludge here was 1948 BC-610F retrofitted to 3-500Z final and modulated with a Crest 4001 solid state audio power amp using half of a T-368 power transformer as a modulation xfmr. Had same 200 uh of Wilcox inductors for shunt fed B+ and waaaay too much Heising capacitance. Made one contact, pulled it apart and moved 33 miles away. Still using large audio power amplifiers for modulators today on my Johnson 500. Learned a lot from those old experiments.