[Kenwood] Kenwood TS-930S WORKS

[W3AFC at aol.com]

To those who have considered ditching the ancient and heavy TS-930S power  
supply in favor of something modern, I just fired up the rig that I posted a 
 question about in this forum, and it works perfectly. I can't believe it. 
At one  time my baby looked like a cadaver in some medical school lab. 
 
I replaced the entire power supply with a Phoenix Contact Quint 24-29.5V  
10-amp (15-amp boost) power supply that I bought NOS on eBay for $70 with  
shipping. The model number is 2866763, but the one ending in 604 will work 
just  as well. These are regulated supplies with output protection. This 
conversion is  easiest with the "Pre-3,100,xxx" serial number rigs, but you can 
adapt the  later models to use this supply also. You can't imagine how much 
this  lightens this rig until you pick it up. I'm running mine at 26.5 VDC to 
prevent  another blow up. 265 Watts input is plenty.
 
I also had to replace the MRF-485 drivers, which I bought on eBay from a  
seller in England. They are Eleflow brand. No oscillation problems at all.  
Some people claim they are rated at 25-volts emitter-collector, but the  
datasheet says 35-volts.The 19-volt  Zener, D5, was also shorted.
 
I'll put together a project report in a few days, along with pictures.  
W1AW/7 just said it sounds great. And it runs cool as ice because I have both  
fans running at about 1/3 speed the moment the power supply comes on. I love 
 this radio, even though this model is really fragile.
 
73, John