021 223 021 223 

Home brew HF Tranceiver KWM-2H

2002.12. ~ 2003.12.



Block Diagram

»ç¿ë ȸ·Î´Â KWM-2(A)ȸ·Î¸¦ ±âº»À¸·Î ÇÏ°í °¢°¢ÀÇ ¹ßÁø±â´Â ¹ÝµµÃ¼ ȸ·Î¸¦ »ç¿ëÇÒ °èȹÀ¸·Î
±â°è½Ä ºÎºÐÀ» ÀüÀÚ½ÄÀ¸·Î ¸¹Àº ºÎºÐÀ» ¹Ù²Ù¸ç ¾Æ³¯·Î±× ¹æ½ÄÀÌÁö¸¸ µðÁöÅÐ µð½ºÇ÷¹À̸¦ »ç¿ëÇÑ´Ù
 

1. ¸¶ÀÌÅ© ÁõÆøºÎ´Â 12AU7°ú 6C4¸¦ »ç¿ë
2.
Mechanical Filter ´Â USB/LSB ¿ë 2°³¸¦ »ç¿ë
3. BFO X-talÀº 455KHz¸¦ »ç¿ë
4. °íÁÖÆÄ ÁõÆø(IF Æ÷ÇÔ)°üÀº º¹ÇÕ°üÀ» ÇÇÇÏ¿´À½

 

1st Mic
amp
5814A ½

2nd Mic
amp
5814A ½

Cath Fol
6C4WA

Balance
Modulator

XMTR
IF Amp
6DC6

 

1st XMTR
Mixer
6060

 

2nd XMTR
Mixer
6060

 

ALC
6BN8 ½
6AL5

 

¨ç½

¨ç½

¨è

 

¨é

 

¨ê

 

¨ë

 

16¨ñ½

 

+200

+200

T+275
R+275

 ¡è

T+275

¢Ù       ¢Ö

TR+275

 ¢Ù       ¢Ö

T+275
-70

¢Ù       

TR+275
-70

 

 

 ¡è

Tone OSC
1750Hz
2N2222A 

 

BFO
455KHz

2N2222A*2

 

Mechanical
Filter
USB/LSB
455KHz

VFO
2.7~2.2MHz
(500KHz)

2N4416*2
2N2222A

Variable
IF Tuning
T2
3.155~2.655

Band OSC
PLL
3.5 ; 6.655
7  ; 10.155
14 ; 17.155
21 ; 24.155
28 ; 31.155

TX/RX
RF Amp
6D
C6

TX Driver
6CL6

PA
6146B *2

 

 

 

+18

 

 

+18 

 

 

¨ì

¨í

¨î¨ï

 

 

 

¢×

 

 ¢×       ¢Ø

¡é

¢×       ¢Ø

 ¡é     ¢×

TR+275
T+275

T+275

T+275

RX AF
Power amp
6EB8 ½

AF Voltage amp
6EB8 ½

Prod. Detctor
6BN8 ½

2nd RCVR
IF Amp
6DC6

1st RCVR
IF Amp
6DC6

 

2nd RCVR
Mixer
6BN8 ½
 6AB4

 

1st RCVR
Mixer
6AB4

 

 

 

¨õ½

¨õ½

¨ô½

¨ó

¨ò

 

¨ñ¨ñ½

 

¨ð

 

 

 

+200

+200

R+275

R+275

R+275

 

R+275

 

R+275

 

 

 

¨õ ; 30mA

 

 

AGC Rect
6BN8 ½

¨ô½   +200

 

 

 

 

 

 

 

RY : +26       PLL +12        Disp : +5

 

 

Z5

 

 

 

 

 

 

 

 

 

 

 

ALC
(16) 6AL5

 

 

 

 

 

 

 

 

 

 

1st XMTR

 

 

 

 

 

 

 

 

 

 

 

Mixer
¨ê 6060

2nd RCVR
Mixer

L14 / L13

 

TX Driver
6CL6

 

PA
6146B

 

 

Tank

Circuit

 

 

¨ñ 6AB46BN8

 

 

¨í

 

¨î¨ï

 

 

 

 

 

T2

 

 

 

 

 

6146B

 

 

 

 

 

IF BF

TX/RX
RF Amp

L10

 

 

 

 

 

 

 

 

 

 

¨ì 6DC6

 

 

 

 

 

 

 

 

 

 

L4

 

 

 

 

 

RX AFamp 

 

Prod. Detctor

XMTR
IF Amp


 

 

1st RCVR
Mixer

T3

 

 

 

¨õ 6EB8

 

¨ô 6BN8

¨é 6DC6

 

 

 

¨ð 6AB4

 

 

 

 

 

 

T5

T1

 

 

2nd XMTR

 

 

 

 

 

 

 

 

 

AC6.3

AV18V

Mixer
¨ë 6060

 

 

 

 

 

 

 

2nd RCVR
IF Amp

Balance

Ttansformer

 

 

 

 

 

 

 

 

¨ó 6DC6

Modulator

 

 

 

 

 

 

 

VFO 

 

L9

Cath Fol

 

 

Filter

 

PLL

 

 

 

 

 

 

¨è 6C4WA

 

 

 

 

 

 

 

 Freq. Counter

 

1st RCVR
IF Amp

Mic amp

 

 

 

 

 

 

 

 

 

 

¨ò 6DC6

¨ç 5814A

 

 

 

 

 

 

 

Front

 

 

 

 

 

Plate

 

Exciter Tunning

 

LOCK TUNE CW USB LSB  ONAIR  Ext.ref

 ¡Ü  

P.A.

Tunning

 

 

Grid

Meter

 

 

 

21.302,25 MHz

 

 

 

S

Meter

ALC

 

 

 

 

KWM-2H

 

 

 

 

 

 

AGC-F

 

 

CW

 

 

28

 

 

 

TX-STBY

 

 

 

 

USB

 

 

21

RF GAIN

 

 

MIC GAIN

IF TUNNING

LSB

Main Dial

14

 

ON/OFF

 

 

 

 

TUNE

 

 

7

AF GAIN

 

 

MIC

PHONE

 

 

LOCK

 

 

3.5

 

 

K_Fuc

KEY

OFF - RX - TRX

 

 

 

 

Rear

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANT

TX RY

ALC

 

MIC / 500

KEY

Band SW

Power Jack

 

 

 

 

 

 

 

(from PM-2 type)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Tube List

 

TUBE

Heater [mA]

Total [A]

Socket

RX

 

¨ç

5814A *1

300

0.3

MT 9 pin

 

AF Amp

¨è

6C4WA *1

150

0.3

MT 7 pin

0.3

RF Mix.

¨ð¨ñ

6AB4 *2

150

0.3

MT 7 pin

0.3

AF, RF Amp

¨é¨ì¨ò¨ó

6DC6 *4

300

1.2

MT 7 pin

0.9

RF Amp, IF Amp

¨ê¨ë

6060 *2
(ECC81)

300

0.6

MT 9 pin

0.6

RF Amp, Mixer

¨í

6CL6 *1
(6677)

650

0.65

MT 9 pin

 

Power Driver

¨î¨ï

6146 *2

1125

2.25

GT 8 pin

 

Power

¨ô

6BN8 *1

600

1.2

MT 9 pin

1.2

Detector, Rect.

¨õ

6EB8 *1
(6GN8)

750

0.75

MT 9 pin

0.75

AF Amplifier

¨ñ
(16)

6BN8 *1
6AL5 *1

 

 

MT 7 pin

 

Rect.

 

15

 

7.25A=
3.65+3.6

7p;6,  9p;7,

3.3

 

 

Terminal

TR+275
T+275
R+275
+200
-70
GND

RX Bias (RX GND)
TX Bias (TX GND)
AVC(AGC)
ALC

Heater 6.3A
Heater 6.3B
Heater 6.3C
Heater 6.3D

KEY
PTT
 

CW
USB
LSB
TUNE
LOCK




ÞÅéÄ Filter  (32RS-1CéÄ)

455 kc F455Z-4 526-9364- 00 2.7 kc @3dB max. Upper Sideband Y(long)
455 kc F455Z-5 526-9365- 00 2.7 kc @3dB max. Lower Sideband Y(long)

 


ÞÅéÄ Power Supply

PM-2  or  516F-2   or    Equivalent

(6.3VAC 10A,  +275VDC 250mA,  +800VDC 200mA,  -70VDC 30mA)


Transformer  45Watt Class       P:  6.3VAC   S: 18VAC