The transistor is a CTC CD4792-4 and there are 4 of them. Need to be at least
350 watt units.
Clayton N4EV
On Saturday, August 9, 2014 2:10 PM, John King via TenTec
<tentec@contesting.com> wrote:
What is the transistor number for the final transistors in the Hercules amp.???
Thanks, John, K5PGW
--------------------------------------------
On Sat, 8/9/14, Brian Carling <bcarling@cfl.rr.com> wrote:
Subject: Re: [TenTec] Hercules 444 amp
To: "k9yc@arrl.net" <k9yc@arrl.net>, "Discussion of Ten-Tec Equipment"
<tentec@contesting.com>
Date: Saturday, August 9, 2014, 9:12 AM
Seems like a lot of RF power
transistors are similar, so it should not be too difficult
to find a substitute.
Best regards - Bry Carling
> On Aug 9, 2014, at 8:56 AM, Jim Brown <k9yc@audiosystemsgroup.com>
wrote:
>
>> 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
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