021 223 021 223 

Home brew HF Tranceiver KWM-2H

2002.12. ~ 2003.12.



Block Diagram

사용 회로는 KWM-2(A)회로를 기본으로 하고 각각의 발진기는 반도체 회로를 사용할 계획으로
기계식 부분을 전자식으로 많은 부분을 바꾸며 아날로그 방식이지만 디지털 디스플레이를 사용한다
 

1. 마이크 증폭부는 12AU7과 6C4를 사용
2.
Mechanical Filter 는 USB/LSB 용 2개를 사용
3. BFO X-tal은 455KHz를 사용
4. 고주파 증폭(IF 포함)관은 복합관을 피하였음

 

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

 

①½

①½

 

 

 

 

16⑪½

 

+200

+200

T+275
R+275

 ↑

T+275

↘       ↗

TR+275

 ↘       ↗

T+275
-70

↘       

TR+275
-70

 

 

 ↑

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 

 

 

⑧⑨

 

 

 

 

 ↙       ↖

↙       ↖

 ↓     ↙

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

 

 

 

⑮½

⑮½

⑭½

 

⑪½

 

 

 

 

+200

+200

R+275

R+275

R+275

 

R+275

 

R+275

 

 

 

⑮ ; 30mA

 

 

AGC Rect
6BN8 ½

⑭½   +200

 

 

 

 

 

 

 

RY : +26       PLL +12        Disp : +5

 

 

Z5

 

 

 

 

 

 

 

 

 

 

 

ALC
(16) 6AL5

 

 

 

 

 

 

 

 

 

 

1st XMTR

 

 

 

 

 

 

 

 

 

 

 

Mixer
6060

2nd RCVR
Mixer

L14 / L13

 

TX Driver
6CL6

 

PA
6146B

 

 

Tank

Circuit

 

 

6AB46BN8

 

 

 

⑧⑨

 

 

 

 

 

T2

 

 

 

 

 

6146B

 

 

 

 

 

IF BF

TX/RX
RF Amp

L10

 

 

 

 

 

 

 

 

 

 

6DC6

 

 

 

 

 

 

 

 

 

 

L4

 

 

 

 

 

RX AFamp 

 

Prod. Detctor

XMTR
IF Amp


 

 

1st RCVR
Mixer

T3

 

 

 

6EB8

 

6BN8

6DC6

 

 

 

6AB4

 

 

 

 

 

 

T5

T1

 

 

2nd XMTR

 

 

 

 

 

 

 

 

 

AC6.3

AV18V

Mixer
6060

 

 

 

 

 

 

 

2nd RCVR
IF Amp

Balance

Ttansformer

 

 

 

 

 

 

 

 

6DC6

Modulator

 

 

 

 

 

 

 

VFO 

 

L9

Cath Fol

 

 

Filter

 

PLL

 

 

 

 

 

 

6C4WA

 

 

 

 

 

 

 

 Freq. Counter

 

1st RCVR
IF Amp

Mic amp

 

 

 

 

 

 

 

 

 

 

6DC6

5814A

 

 

 

 

 

 

 

Front

 

 

 

 

 

Plate

 

Exciter Tunning

 

LOCK TUNE CW USB LSB  ONAIR  Ext.ref

 ●  

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

 

5814A *1

300

0.3

MT 9 pin

 

AF Amp

6C4WA *1

150

0.3

MT 7 pin

0.3

RF Mix.

⑩⑪

6AB4 *2

150

0.3

MT 7 pin

0.3

AF, RF Amp

③⑥⑫⑬

6DC6 *4

300

1.2

MT 7 pin

0.9

RF Amp, IF Amp

④⑤

6060 *2
(ECC81)

300

0.6

MT 9 pin

0.6

RF Amp, Mixer

6CL6 *1
(6677)

650

0.65

MT 9 pin

 

Power Driver

⑧⑨

6146 *2

1125

2.25

GT 8 pin

 

Power

6BN8 *1

600

1.2

MT 9 pin

1.2

Detector, Rect.

6EB8 *1
(6GN8)

750

0.75

MT 9 pin

0.75

AF Amplifier


(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




使用 Filter  (32RS-1C用)

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)

 


使用 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