[VHFcontesting] TE Systems 0552G 6 Meter Amplifier - Oscillation Problems SSB

[Eric Smith]

The "main bus" power distribution in the rover rig consists
of 3/0 welding cable. Branch circuits to the TE systems
amps, (0552G) and (2252G) are 3 foot lengths of #4 welding
cable, tied to the 3/0 welding cable thru bus bars and 60
amp magnetic circuit breakers.
Battery capacity is on the order of 400Ah, and the rigs and
bricks flatten them out after about an hour or two...
 Alternator is 160A Leece-Neville.
Runs the amps just fine...
Eric
KB7DQH

On Tue, 19 Jul 2005 21:47:04 -0500
 "Bob & Fran Striegl (K2DRH & N2KMA)" <k2drh at sanasys.com>
wrote:
> Never owned a TE systems amp that was "junk".  Some of
> mine are over 12
> years old and still cranking.  I use them on 6 through
> 432 in every contest
> I run.  They have literally thousands of QSO's on them
> and I've run them
> hard.  I suspect that you're current starving your amp
> with an inadequate
> power supply, probably due to too light an AWG power cord
> or not hooking it
> directly to the battery in the mobile.  Reducing the
> drive on the exciter to
> make it work better was the clue.  These amps are rugged,
> simple designs
> that need serious current!
> 
> The 375W one you have wants about 50A on voice peaks!
>  Even the
> 0510/1410/2210/4210 series that I use want a sold 30A
> when they key down on
> WSJT and will get hot enough to go into thermal shut down
> if you don't put a
> fan on the heat sink.  An Astron 35 would not work and I
> had to go to a 50.
> I've heard quite a few of them operated with inadequate
> current before and
> they really howl.  If you are using anything less than a
> short #8 AWG power
> cord directly to the battery in the rover I'd suggest you
> try reconfiguring
> first before you send it back.  Hopefully the low voltage
> that resulted from
> current starving it has not damaged anything yet.
> 
> Good Luck,
> 73 de Bob - K2DRH
> 
> > Date: Tue, 19 Jul 2005 09:49:08 -0400
> > From: "Steve Gilmore" <shg at staffnet.com>
> > Subject: [VHFcontesting] TE Systems 0552G 6 Meter
> Amplifier -
> > Oscillation Problems SSB
> > To: <vhfcontesting at contesting.com>
> > Message-ID:
> <HDEPJBPFHBDOANHGEJLAOEIPDFAA.shg at staffnet.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> >
> >
> >
> >
> > Anyone had a problem with this and possiblly a mod to
> fix TE's junk...
> > (Being Nice)
> > Though I'd post this to see before it goes to them for
> a 2 month or more
> > repair.
> >
> > Steve - W4SHG
> 
> 
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