1. The Centurion Amp with the 3-500Z tubes is instance on. Turn it on and go.
No warm up is needed.
2. I tune up looking at my wattmeter, but you can do the same thing looking at
the FWD setting on the amp meter. but as you get close to 1 KW plus, you need
to also check the grid meter so you don't over drive and get above 260MA.
3. The other positions on the meter, Ref, is reflected power just like a SWR
bridge. You should never have very much REF power.
The Ep is you plate voltage, it should move a bit down wards but too much means
your 220VAC line is not give enough power.
4. That is why I used a wattmeter and adjust for maximum on it. As you said,
the Ig grid current is the most usefully meter position once you get up to
maximum power.
Joe K0BX
using the Centurion with a FLEX-3000
#1 Honor Roll Mixed
Honor Roll RTTY
Stop the insanity!
Please do not add me to any distribution lists (Joke, Stories or Junk) without
my permission.
________________________________
From: Richards <jrichards@k8jhr.com>
To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Sent: Tuesday, June 25, 2013 5:17 PM
Subject: [TenTec] Amplifier Question
OK...
1) How long do I need to wait before my Centurion amp is warmed up and ready
to transmit? The manual says nothing, and I am sure one should not key the
exciter too soon. But... how soon is too soon?
2) What METER do you guys watch, and why?
The right hand meter has four display options. I usually watch the Ig (grid
current) meter option, as the manual says this is the most important parameter
to monitor. It says it should not exceed 260 ma - I have never seen mine go
above 240 ma at any exciter in level. Just one reason I think this is an easy
amp to tune.
Does anyone monitor any of the other three meter settings? If so, what are you
looking for and why?
The Plate meter hardly ever moves, and the FWD and REF settings do not seem
very informative, because the scale markings are designed to convey Grid and
Plate information, not power information - and the PEAK POWER meter on the
right side more obviously indicates power out. I cannot imagine why one would
watch the FWD or REF meter setting - but, know I still have a lot to learn...
Any ideas?
============ THANKS ! / K8JHR ===================
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