TEN-TEC 425 GOLD
Been wanting one of these Amp's for a long
time. In November 2015 was able to purchase one of them.
Thanks to a fellow Ham Odis KC4BMX, And as it
turn out the last 50 amps produced had a special numbers they
were referred to as
TEN TEC GOLD
Mine is serial number 11
About 1200 watts out put 27 WATTS DRIVE
In the above picture the tubes are 3CX800A
In the right rear corner is a mechanical shorting
bar made out of aluminum in the shorted position.
This is taped to the top cover when removed AMP
is dead shorted to ground, to protect to operator.
Article by Scott Robbins W4PA
From the Ten-Tec
Reflector January 18, 2008
The Titan 425 is rated at
1000 watts continuous – no time limit. Running RTTY with that
amplifier at 1500 watts in usual digital mode duty cycle will not
present a problem. The maximum power output for CW and SSB was
well over 2000 watts – it was designed with lots of headroom. The
pair of 3CX800A's is rated 120 mA maximum grid current; 1500 watts
out into a good load should run the amp in the 30-40 mA range,
There were 3 Amateur Radio
versions of the Titan 425. The easy way to tell them apart: the
first had a dark case like the original Corsair, mid-1980's. The
second was a grey case, Corsair II-style knobs and says TITAN 425
on the front panel. Serial numbered up to 425-01000. Roughly 1986
to 1989. Third version has the rubberized knobs like the modern HF
rigs, says TITAN on the front, serial numbers after 425-01000 and
then date encoded serial numbers which we started using in 1989.
There technically was a fourth version – the "Titan Gold" series,
which were the last 50 units built of the Titan. They had a gold
plate on the front and a gold plastic logo. They are the same as
the third version except they were the very last ones we sold when
we announced we were cutting it off and doing one final production
run in 1996-97.
For the technical
differences between the amps, I'd refer to the service department.
I don't know them off the top of my head.
There was also a military
version of the Titan called the Titan 425D. Different power supply
– rack mount unit. More broad banded coverage than the ham bands
version, the front panel band switch labeling is not 15-20-40 etc.
for the ham bands, but was labeled with frequency information like
3.3-5.7 MHz, etc. Required
less drive power than the 425. Front panel, rear panel, and power
supply also say Titan 425D. Interestingly enough, 15 years or so
out of production not many of these have turned up for ham radio
use. One can only wonder where they all are now.
I bought a used 1989 vintage
second version Titan 425 in 2001 and it has been run up to 20
contests a year since that time. Great amp.
Flyer tick on Picture