[Collins] {Collins} 30L-1 resistors & etc.

[J. A. Call]

Hello to the List:  Here is  your chance to get some hard to find grid
and parasitic suppressor resistors for your 30L-1 transmitter.

Item #1. Replace those old tired, burnt out,  out of tolerance grid
resistors with four (4) brand new 47-ohm 1 watt Allen Bradley carbon
composition grid resistors.  Shown on the 30L-1 schematic as R21, R22,
R23, R24.   You should have these as spares in case you develop a grid to
plate short in one or more of your 811A's. These are the ones that
vaporize.  Price
is $5.00 for four (4) plus $1.50 FIRST CLASS - USA  shipping plus $1.30
insurance if desired.

Item #2.  Replace those old tired, burnt out, out of tolerance parasitic 
suppressors with two (2) new homemade parasitic suppressors using  (2 ) 
new Allen Bradley 2  watt carbon composition resistors the values of
which will be either 91 ohms, 100 ohms, 110 ohms, or 120 ohms. The
tolerance of the resistors will be either 5% or 10% which places them all
well within the 25 - 250 ohm value, which is acceptable for parasitic
suppressors, according to ARRL handbooks and  other construction articles
for amateur transmitters.  These are shown as Z1 and Z2 on the 30L-1
schematic. $6.00 for the pair plus $1.50 FIRST CLASS USA shipping 
plus $1.30 if insurance is desired.

Item #3. 1 each  47 ohm 2 watt carbon composition resistor shown as R9 on
schematic.  Collins changed the value of this resistor from 82 ohms to 47
ohms in instruction book 523-0122-00 4th edition.  This is the exact
replacement. $2.50 ppd.  

Item #4.  1 each 10K ohm 2 watt carbon composition resistor shown as R15
on schematic. This resistor changes values due to heat.  Exact
replacement.
$2.50 ppd.

Item #5. 2  each 10 ohm 2 watt carbon composition resistor shown as R17
and R18 on the 30L-1 schematic. Resistors open up or change value due to
short on B+ line. $5.00 ppd.

Item #6 1 each  Dale 1 ohm 1% 5 watt wirewound resistor shown as R8 on
30L-1 schematic and located on bottom of  B+ resistor string.  Acts as a
meter shunt.  $3.50 ppd.

Item #7.  Replace your old style tube sockets in the 516F-2 AC power
supply with new genuine ceramic sockets.  These are not the inferior
Chinese
replacements but genuine 8-pin USA  sockets for the 5U4 and 5R4 tubes 
and are made  by Amphenol and which has  their name imprinted in the
ceramic. Has the
mounting ears for replacement with bolts and nuts  or can be mounted in a
hole and secured with  the mounting ring. Note:  Will require enlarging
the 
chassis mounting hole and drilling new holes for the mounting ears.
$12.50 each
plus $1.50 shipping. Combine items and reduced shipping charges.

J
W7KSG