Re: [TenTec] Hercules 444 amp

[Jim Brown <k9yc@audiosystemsgroup.com>]

On 8/9/2014 12:37 AM, Douglas via TenTec wrote:
> Has anyone figured out a substitute for the final transistors in the original 
> Hercules amp?
You might ask on the amps reflector. I suspect the answer is still no. I 
owned one of these amps for a few years and sold it. The original story, 
as I heard it, is that Motorola learned that the output transistors had  
problem, and discontinued them.
The power supply also has a temperature stability problem that causes 
Vcc to rise, which in turn causes it to go into self protect mode as it 
warms up. I decided to fix mine with a fan on the power supply. :)
73, Jim K9YC