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" I know a whole lot, about nothing--
but a lilte bit, about some things "
Pikesville Squirrel
" SQUIRREL'S SONG "
" 10 Meters and CB Peek
and Dip Tube Linears "
Some people wanted to know how to tune a tube linear.
Well you must " PEEK RF OUTPUT WITH WATTMETER AND DIP THE PLATE CURRENT. "
I can see some people, saying what the " HELL IS THAT " ?
" Web Williams from 11meteramps@yahoogroups.com
write's this ::
"
Peak means to adjust a control until you get the MAXIMUM indication on a
meter."
"
Dip means to adjust a control for MINIMUM indication on a meter.
"
Typically, the procedure is this::
1. Hook everything up (radio to amp, amp to wattmeter, wattmeter to
dummy load
which is capable of handling the full output of the amp for as long as
it take you to
perform the tune-up).
2. Set your radio's output to as low of a setting as it will go to,
typically one watt or so.
3. Set the amp's " LOAD " control to mid-point and the " TUNE " control to about
the same point.
4. Key your radio and " QUICKLY " turn the " TUNE " control back and forth to get a
feel for the proper direction to increase power, then " UNKEY " and wait a few
seconds for things to cool down.
5. Key up the radio again and watch your " OUTPUT " wattmeter while rotating
the " TUNE " control for maximum power out. The " PLATE " meter should indicate
proper neutralization of the tubes " IF ", you see a pronounced dip which
co-incides
with maximum output. If it doesn't, you need to neutralize/balance the
load power
between the tubes. There is a control " INSIDE " the amp for this purpose if
your
amp is worth a plug nickle. " BUT " *** BEWARE *** of the " EXTREMELY HIGH
VOLTAGES " present inside the amp! " THEY CAN BE DEADLY!!! "
6. After tuning the " TUNE " control for max smoke (highest wattage as seen on
an external wattmeter) then unkey and let things cool a moment.
7. Next key the radio again and adjust the " LOAD " control for maximum smoke.
8. Unkey and wait a moment, then go back and re-peak the " TUNE " control again.
9. Finish up by adjusting the " LOAD " again for max smoke.
10. Now you have preliminary settings, and can begin increasing your
radio's
drive power. Increase to the wattage you expect to be driving the amp with,
and repeat the tune procedure.
11. Once tuned into a " DUMMY LOAD ", then switch to your antenna, and
re-peak. If your antenna is adjusted properly, you should not need to
re-adjust
the amp much, if at all. If your antenna is mis-tuned, then you'll have
to re-adjust
the amp.
12. For frequency excursions within the same band, you should be able to
leave the load control alone (pretty much) and simply tweak the " TUNE "
control a bit to re-gain power lost by changing frequencies. If you seem to
lose a LOT of power, you may have to re-adjust the " LOAD " control
accordingly.
13. Always make sure that your " PLATE CURRENT " dips at practically the
same tuning point as " MAX SMOKE ". Slightly off a bit is " OK ". Some people
advance the " LOAD " control slightly to lessen power a few watts because it
supposedly makes the amp sound better. Use signal reports from others to
see if this adjustment benefits you or not.
14. If you don't dip the plate, you're going to wind up burning up a set of
tubes.
That's about all there is to know about the care and feeding of a tube amp.
73, -Web
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Lycos Small Business
The Copyright Minefield
By Jacqui Kramer, Contributing Author
10/5/2000 9:19:53 AM PDT
"The copyright issue is a sticky one for Web site owners and their employees, particularly contractors.
Currently in the United States, there are no laws that specifically address copyright issues in the online world.
However, the U.S. courts have ruled that existing copyright laws governing the print world can be applied to the online world."
If by mistake, I've used someone's copyright material, notify me, and I'll remove it.
All Trademarks are Recognised as belonging to Their Respective Owners
Copyright © 2000 - 2008 The Lying Living Legend, All Rights Reserved.
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