KLM ELECTRONICS, INC.
LINEAR VHF AMPLIFIERS
CLASS "AB" FM/CW/SSB/AM
This series of amplifiers is designed for 143 to 149 Mhz 2 meter band operation. The designs use the latest in micro-stripline techniques and highest quality state of the art transistors. Relay switching is automatic RF sensing. These units do not require any tuning. The boardband design offers the ultimate in flat input VSWR, 1.4:1 or less, and produces rated power output or better across the entire two meter band. This amplifier can be used for AM or SSB operation as well as FM and CW.
The front panel switch on all models switches the amplifier in or out. Withthe switch "in", the 13.5 VDC is supplied to the RF sensing and relay circuit inside the amplifier, however, the unit will not draw any current until the transceiver or transmitter is keyed and RF is applied to the amplifier. At this point an audible click of the relay can be heard and the LED light on the front panel will light. The amplifier will now amplify the RF applied. In the "out" position, the amplifier will bypass the RF through the amplifier.
Forced DC keying can be used by applying + 9 to +15 VDC through a 10k resistor to the base of the MPSA 13 relay driver.
TYPICAL SPECIFICATIONS FOR ALL MODELS
IMPEDANCE: 50 ohms input and output
SUPPLY VOLTAGE: 13.5 VDC (usable from +11 to +14.5 VDC)
INPUT VSWR: 1.4:1 144-148 MHz
DUTY CYCLE: CAS (Intermittant Commerical Amateur Service)
RF CONNECTORS: SO239
|
MODEL NUMBER |
RF POWER INPUT (watts) |
USUABLE PWR. INP. (watts) |
NOM. PWR. OUTPUT (watts) |
NOM. CUR. (amps) |
SIZE |
FUSE 3AG SIZE (amps) |
|
PA 10-160BL |
10 |
5-15 |
160 |
22 |
6.5x10x2 |
30 |
|
PA 2-70BL |
2 |
1-4 |
70 |
10 |
6.5x7.5x2 |
15 |
|
PA 10-80BL |
10 |
5-15 |
80 |
10 |
6.5x7.5x2 |
15 |
|
PA 10-40BL |
10 |
5-15 |
40 |
5 |
6.5x5x2 |
71/2 |
|
PA 10-70BL |
10 |
5-15 |
70 |
8 |
6.5x7.5x2 |
10 |
|
PA 10-140BL |
10 |
5-15 |
140 |
18 |
6.5x10x2 |
25 |
|
PA 30-140BL |
30 |
15-45 |
140 |
15 |
6.5x10x2 |
20 |
PA10-70BL/PA10-80BL
|
C2,3,4 |
68 pf |
Underwood |
|
C5.6 |
200 pf |
Underwood |
|
C8,9,16,17,22 |
.001 MFD |
disc |
|
C7.14 |
1/35 VDC TANT |
|
|
C10.11 |
100 pf |
Underwood |
|
C2.12 |
47 pf |
Undeiwood |
|
C1,13,20,21 |
750 pf |
DM15 |
|
C19 |
5pf |
disc |
|
C23 |
25/15 VDC Eletrolytic |
|
|
C18 |
47 MFD |
63 VDC |
|
C15 |
1000pf |
Feed Thru Allen Bradley |
|
D3,4 |
1N914 |
|
|
R6 |
22k |
1/4 Watt |
|
R5 |
560 OHM |
1/2 Watt |
|
RFC1.3.5 |
.15uH |
|
|
Q1 |
MRF245 |
Motorola |
|
Q2 |
MPSA13 |
Motorola |
|
R7 |
560 OHM |
1/4 Watt |
|
R2 |
100 OHM |
Pot |
|
R3 |
3 OHM |
1/4 Watt |
|
R4 |
50 OHM |
5 Watt |
|
S1 |
Alco |
SPDT |
|
LED |
MV5053 |
|
|
R1 |
15 OHM |
1/2 Watt |
|
RFC2 |
5T#16 |
1/4" Dla. x 1/2" Ig. |
|
RY1 |
Relay 1355/1365 |
|
|
D2,1 |
1N4003 Diodes |
|
|
F1 |
Fuse |
15A |
|
RFC4 |
4.7uH |
PA30-140BL
|
C3,4,5,11,13 |
68 pf |
Underwood |
|
C6,7,12,14,10,17 |
200 pf |
Underwood |
|
C9,16,24,23,29 |
.001 MFD |
disc |
|
C8,15,19 |
1/35 VDC TANT |
|
|
C22 |
47 pf |
Underwood |
|
C1,21,27,28 |
750 pf |
DM15 |
|
C26 |
5pf |
disc |
|
C20 |
25 MFD |
16 VDC |
|
R7 |
22k |
1/4 Watt |
|
RFC2,3,1,5 |
.15uH |
|
|
RFC6 |
4.7uH |
|
|
Q1,2 |
MRF245 |
Motorola |
|
Q3 |
MPSA13 |
Motorola |
|
RY1 |
Relay #1355/1365 |
Guardian |
|
D2,3 |
1N914 |
|
|
D1,4 |
1N4003 |
|
|
R8 |
560 OHM |
1/4 Watt |
|
R6 |
560 OHM |
1/2 Watt |
|
R3 |
100 OHM |
Pot |
|
R4 |
3 OHM |
1/4 Watt |
|
R5 |
50 OHM |
5 Watt |
|
R1,2 |
15 OHM |
1/2 Watt |
|
S1 |
Alco |
SPDT |
|
LED |
MV5053 |
|
|
C30 |
33 pf |
Underwood |
|
RFC4 |
5T#16 |
1/4" Dia. |
|
C25 |
47/63V |
Electrolytic |
|
C18,2 |
Feed Thru Allen Bradley |
|
|
F1 |
Fuse |
15A |
PA10-160BL
|
C36 |
47 MFD |
63 VDC |
|
C13,14,15,21,23 |
68 pf |
Underwood |
|
C16,17,22,20, 24,27 |
200 pf |
Underwood |
|
C18,25,34,35,40 |
.001 MFD |
disc |
|
C19,26,30,10 |
1/35 VDC TANT |
|
|
C2,6,28 |
47 pf |
Underwood |
|
D1,7,32,38,39 |
750 pf |
DM15 |
|
D37 C31 |
5pf 25 MFD |
disc 25 VDC |
|
D8,9,29,11,12 |
470 pf |
Allen Bradley |
|
D5 |
100 pf |
Underwood |
|
R12 |
560 OHM |
1/4 Watt |
|
R10 |
560 OHM |
1/2 Watt |
|
B1 |
15 OHM |
1 Watt |
|
D4,5 |
1N914 |
|
|
D1.2.3 |
1N4003" |
|
|
02,3 |
MBF 245 |
Motorola |
|
Q4 |
MPSA13 |
Motorola |
|
Q1 |
2N6084 |
Motorola |
|
BFC3,4,5 |
.15uH |
Choke |
|
RFC8 |
4.7uH |
Choke |
|
B11 |
22k |
1/4 Watt |
|
B3,6 |
100 OHM |
Pot |
|
B2,5 |
3 OHM |
1/4 Watt |
|
B4,7 |
50 OHM |
5 Watt |
|
BFC1,2,6 |
5T#16 |
1/4" dia. |
|
BY1 |
Belay 1355/1365 |
|
|
F1 |
Fuse 25A |
|
|
LED |
LED and Mount |
MV5053 |
|
S1 |
Alco SPDT |
PA10-40BL
|
C1,9,17,18 |
750 pf |
DM15 |
|
C2,8 |
68 pf |
Underwood J101 |
|
C3,4,7 |
200 pf |
Underwood J101 |
|
C5 |
.01 |
disc |
|
C6.11 |
1 MFD |
35 VDC TANT |
|
C13,19,10 |
.001 MFD |
disc |
|
RFC1,4,2 |
.15uH |
|
|
RFC5 |
4.7 nH |
|
|
C16 |
5pf |
disc |
|
Q1 |
B40-12 |
CTC/2N6084 |
|
Q2 |
MPSA13 |
Motorola |
|
B1 |
15 OHM |
1/2 Watl |
|
B6 |
22k OHM |
1/4 Watt |
|
R5 |
560 OHM |
1/2 Watt |
|
R7 |
1000 OHM |
1/4 Watt |
|
R2 |
100 OHM |
Pot |
|
R3 |
3 OHM |
1/4 Watt |
|
R4 |
50 OHM |
5 Watt |
|
LED |
MV5053 |
|
|
S1 |
Alco |
SPDT |
|
C15 |
47/63 |
Electrolytic |
|
D3,4 |
1N914 |
|
|
RFC3 |
5T#16 |
1/4" Dia. |
|
RY1 |
Relay 1355/1365 |
|
|
D4,5 |
1N4148 or 1N914 |
|
|
D1,2 |
1N4003 Diode |
|
|
F1 |
Fuse |
7 1/2A |
|
C12 |
Allen Bradley |
PA 2-70BL
|
C2.14.17 |
100 pf |
Underwood |
|
C6.15.29 |
47pf |
Underwood |
|
C10.11 |
200 pf |
Underwood |
|
C8.9 |
66 pf |
Underwood |
|
C1,5,16 |
750 pf |
DM15 |
|
C3,12,21,22,27,28 |
.001 MFD |
disc |
|
C13,4,18 |
1 MFD |
35 VDC TANT |
|
C24 |
5pf |
disc |
|
C23 |
47/63V |
Electrolytic |
|
R11 |
560 OHM |
1/4 Watl |
|
R10 |
22k OHM |
1/4 Watt |
|
R9 |
560 OHM |
1/2 Watl |
|
R8 |
15 OHM |
1/2 Watt |
|
RFC3,5,6 |
.15uH |
Choke |
|
Q3 |
MPSA13 |
Darlington |
|
RFC7 |
4.7uH |
Choke |
|
C7 |
22 MFD |
16 VDC |
|
D4,5 |
1N914 |
|
|
Q1 |
B12-12 |
|
|
Q2 |
MRF245 |
|
|
R2,6 |
100 OHM |
Pot |
|
R3,5 |
50 OHM |
5 Watt |
|
R4,7 |
3 OHM |
|
|
LED |
MV5053 |
|
|
S1 |
Alco |
SPDT |
|
RFC1,2 |
5T#16 |
1/4" Dia. |
|
RY1 |
Relay 1355/1365 |
|
|
RFC4 |
7T#16 |
1/4" Dia. |
|
D1,2,3 |
IN4003 Diodes |
|
|
C19,20 |
Feed Thru Allen Bradley |
|
|
F1 |
Fuse |
15A |
|
R1 |
15 OHM |
1 Watt |
INSTALLATION INSTRUCTIONS:
Connect the positive supply voltage to the red fused lead Connect the gnd lead to the negative or ground side of the power source Number 12 AWG wire or larger is recommended if the supply leads need to be lengthened Connect the amphfer between the transmitter or transceiver and the antenna RG-8A/U or equivalent coax is recommended for the connection between the amplifier and the antenna The amplifier may be mounted in any position
INSTALLATION HINTS:
1 Check all coax cables for proper impedance (50 ohms) and freedom from shorts and/or opens
2 Although the maximum input SWR to the amplifier is 1 4 1, some transceivers may still be unable to produce power into the amplifier If this occurs, try a different length of coax between the transceiver and the amplifier One half wave multiples is probably the best choice (Belden foam 8214 31 5 inches RG-8LJ 26 75 inches )
3 If the amplifier switching is intermittent or if the relay buzzes when keyed, check the following a Inadequate drive power from the transceiver
b High antenna SWR (Try adding another 1A wave to the feed line )
c RF getting back into the transceiver caused by close antenna proximity, poor mic shielding, etc
4 If the amphfer appears to produce low power out, check the following
a A watt meter between the amplifier and the transceiver will check the drive level
b Measure the voltage during amplifier operation as close to the amplifier as possible Voltage for spec output is 13 5 VDC c Even the best watt meters have an accuracy tolerance and they can be fooled if harmonic or parasitic energy is present Check the power at least two positions in the input and output line of the> amplifier, there should be no significant change in power
5 The amplifier when installed should draw no current (less than 10 MA)