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  9. AMERITRON AL811 User manual

AMERITRON AL811 User manual



 !"## $%"&'(# ##""
!)##&!#(#""#"&# #)
*#+####*##(,#* #
hps://www.ctrengineeringinc.com/ameritron-811-811h-upgrade-kits/
- [email protected]
#"&###!!+" .-#&#.##&#+!)#(/
##&#)#)"(*##*#+##+#+
*0#*.#"0#*#(#) #)###+
!"#(
!###"&)&! ) .#,,1!2
)34)3("
# #"#)+#"!#)56
$,)7+'7
('!+8#95*"5!:#:""&"#
('!*+%-9###
;('<"&
=('!&###(#####""#

$,"&',
('"&#>?+#
('<"&
;(' )8##
=(');(@A:)8B#
:('5@5)87 A!##
6
C
5:5)85"&*## ))

!&#"&#"+CD(# 
##.+#+)*#*) #E+"##"(,#"#
,,1)34)3(")###"&#!) (
Overview
####()#+"##+)*SSB and
CW only(&#-#)#!3#)+#.++*#)*+
-(##+#+"#.#*+8+#&
0#*!5+(+8*#+"(
##"& ##!"!+" !#*"#*9#!
#(C##"&#+!#) (/ ##
*#*+(
AL811
5+#9(#))9:FG+#.+#
#+(#*5"#)##. ,HC(This kit has
one chassis mount RF-rated 25W resistor, one 0.01uF ca acitor, and hardware. In addi#on you will need a 0.113
to 0.125” (1/8”) drill to add one hole for 4-40 machine screw clearance. 
AL811H
!+#9(I+#.##!.+"#+#"+*:
#+*1#)9(Any swam ing resistance is o #onal;
it just makes neutraliza#on less cri#cal and closer matches drive level to 100W exciters. With bias changes the
swam ing is not required.
NOTE:  
 !"#$%
&'()*
#"9&"#0")*###/" (
+!#+&"&#+""")0
(
Neutralization


 !"#$$"#%
&'()"*+"
, +- .+/0'
'()1%(1
Major Concerns
There have been dozens of instances of hard faults in tubes damaging radios.##++
#+."#("#!+"#!#+#
+#("#!+" C?J"0""."0.
(EK#&*!#L##!-."+"#"
(
+"#!M#*#"!)#!#!
*+"(!#.)".#+*#!
"##(J###&*#+#"#(
!#9""#(##!#!
+(#"#*#&"#."(#55"#
"*##*# (.!"."#)*
*#"#"#(#"#*" #(" ##"
"##"()+##""##!#)5##.##"!-"#
+)N 9)+#""( #*##"
#(
#"+##(I"""#(
"".+)5##.#(##"###*7##!)5*
#"&#+)+#"(#" " +!
)#8!!))8#(#"# **#")
#.))#"###<#(
#!-""(#+#.
"""#(*#""#CI.#)
#""("#HJ"O#&*")
*""("#HJO##)*P"
(


$I'
This kit does the following:
(' #)Q:*R>#?#"+#!""###+#(Littelfuse gas
discharge tubes (GDT) surge arrester devices protect personnel and equipment from damaging high
voltage transients induced by lightning, inductive switching, or electrostatic discharge.##
#+;:*#+# (#+#&>?E##+*8!!"(>?E#
"(>?E#9"*.+"5#"9
(' #"#"#*#-9###(##"&"
(##)#+"(77/7?J
M##!"###(
;(' "###+#(G#*#+!S"")&"+&/?);(@*
:)8B+##(!##!+##.JHD!##
##))"(!#*#!+##+.
)##(#+5-#""+(#)+;5
<9# ".=5
=(' #&*"(#"##
##(##H=##( #"#!#!##
1(#"#*&!"&!#
:('  ##!."*E#!
##*#(#*#) QR#"*!8#
+9&)#>?E#+#
<(' 7#&>?!)!"CI""
F(' Tshould*/JAE#!!"&*!""##+(/JAE#
))"&/JAE#!(!)#
+" !0"(!!""#+#
5+#-+" ###!"&*/JAE#
#*"(+" #)##+(##+!&")#
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,%23,4
562
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!0!"-X)#!Q#R#!" (?##*)
" #7!&#" #(,#"
)##&)(!>>#!5)#(


$I(@'
!##"+###.#+"(+#**
+!(!!"&"""#(: +
##!#+)8#+#(##+####""# (
#"&*"!+)!+#"
## (
 
$I('


$I('
?<"+#") ###"
#"#)"&+ ""+ &*(#
)#"!"###""+ &*.
##+###(#!#("&#
"#?<(?<#" "( #" #("5#
!+(##(C!I((
$I('
B# ""##)#!)"(
+#""#)#!.I(F.#"B#(
D"#:)8##;(;*#!+#(#!(:#
"&#)(
###B&<"&##+!!
+F(;*#.)B###!#*+#"&#(
)+&"+"#/?!&+#.+#)
"(,# ###&(*<:#*+&(
#"+#+"Y))!(7+#.#
# *))))!$#'(/  ##(
# ""&#(#)##-(I(
;(
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$I(;'
# #"##5;)80##(There are mul# le oints this
resistor can be connected, without a great deal of di9erence I’ve seen so far. ###"
!+"###!)(T"*
8"B##).#"##"*"(####"##
 >?E#!Q&" RQ"" R"*#+#)#+#(
##E##&B#####""
(##"#+"###.+(
!"#)+6I(:<+E#&(
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