[TenTec] Station power supply --> AIRPAX Circuit Breaker

[Rick - DJ0IP / NJ0IP]

Originally the manuals of all Ten-Tec HF transceivers contained a warning
that was worded like this:

The insertion of the TEN-TEC Model 1140 Circuit Breaker in Series with the
12 VDC supply line will protect the final amplifier from over-current
conditions and provide an external on-off switch.  (Omni C)

OR

In all cases of battery operation, Model 1140 Circuit Breaker should be used
in series with the +12 volt lead to provide over-current protection. (Delta
580)

Beginning with the Paragon (I), there was no more mention of this circuit
breaker in the manual of the newer rigs.

IN FACT, the 1140 actually trips too early to enable running full power with
most of the newer rigs.  Early 100w rigs required only 18A whereas newer
require 20A or even 23A.  If you want to use an AIRPAX with newer rigs, you
need one with a higher amperage rating.

IMPORTANT: if one operates from battery, it is a good idea to place a fuse
or circuit breaker in the line, near the battery, just for general safety.
For the sake of being accurate, I will also add, PLACE IT IN THE +12v lead,
not in the ground lead.  :-)

73
Rick, DJ0IP



-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Mike Bryce
Sent: Tuesday, September 04, 2012 10:04 PM

Subject: Re: [TenTec] Station power supply??

Of course, when running ten tec transceivers, the use of a non factory
supply increases the need for an air pax fast acting circuit breaker to
protect the rig's final transistors. 

Mike wb8vge