[TenTec] LDG AT-100 Pro
nq5t at comcast.net
Fri Apr 15 07:14:50 EDT 2005
> As I said to their rep, "How can one even accurately measure
> 25 watts into an unknown antenna impedance?"
There is certainly no problem measuring low power into any antenna Z.
> I was a bit suspicious of its power rating when I opened it
> and noted that it was only using 600 v capacitors. That's
> certainly fine for 25 watts but not for 125 watts into a
> maximum load impedance of 1000 ohms - per the specs.
> Peak-to-peak voltages, not including transients, could easily
> exceed 700 wolts under such conditions.
I read this, the derating is only applicable DURING tuneup. I'm not
terribly surprised, since you have to remember that the tuner is
hot-switching the L/C combinations. The derating is probably at least as
much related to keeping the relay contacts from burning up.
> I'm wondering if Ten-Tec broke their relationship with LDG
> over reliability issues?
Maybe T-T just decided to build their own (?) Maybe LDG decided there
wasn't enough money in supplying custom OEM tuner boards in the quantities
needed by T-T (?) I use my Orion's internal tuner a good bit since I rarely
turn on the amp, and it's a lot more convenient than cranking the MB-V-A
around. There have been no issues with it. Just keeps on workin'. The
Orion DOES automatically reduce power to 20 watts (or 25, I forget) during a
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