(Schematic)
Left and below: Inside views of the front panel and chassis before wiring.
The pattern was drawn for a 10" X 4" (254mm X 101.6mm) panel. I found this spec from the Digi-Key site when I ordered the enclosure but I found out the panel was slightly smaller so I had to change the printer settings. Using Photo Studio 5, I selected 10.28" and 4.18", plus allow distortion. I printed on a HP DeskJet 3322 with W98SE. Those of you who are graphics/printer smart will know why I used the indicated settings. All I know is the pattern fit just fine.
I opted to print on white ink jet paper, lightly sprayed both sides with a art fixative and let each side dry about 12 hours before spraying the other side and installing on the panel. This sealed the paper. I used Elmer's spray adhesive to apply the label sheet. I used a light spray on the steel panel and waited 15 minutes before applying the sheet, which I trimmed with a sharp Xacto knife before applying. I practiced this a few times without adhesive to make sure of alignment. I also practiced with a reverse print clear material. I made some slight measuring errors for some of the holes, which is why I did not just print to clear material. The paper covers up these errors. I let the spray adhesive set for 24 hours before applying a clear self adhesive-laminating sheet over the white sheet. The result is very nice. I decided to keep it simple. I have installed all the controls and the panel is quite sharp when mounted in the chassis with the knobs in place. I need one more knob, which I will order with parts for another project.
Coils
2 ea 1 uH air coil, #20 enamled wire
2 ea Mouser 580-22R103 10uh Q=140 R=0.05 ohm
2 ea Mouser 580-22R104 100uh Q=160 R=0.5 ohm
2 ea Mouser 580-22R105 1mh Q=150 R=3.8 oms
2 ea Mouser 434-02-103J 10mh Q=100 R=12.1 ohms
RF Transformers
Used 4: 1 to change 52 ohm impedance to 12 ohm impedance for higher Q.
Used 1:1 to dc isolate Notch tuning circuit.
Coil Craft
WB1010-PC WB1010-SM 1:1 0.005 - 100
WB1040-PC WB1040-SM 4:1 0.2 - 300
(Mini Circuits http://www.surplussales.com/Mini-Circuits/Xformers.html)
1 ea T1-6 W38 10kc - 150 Mc 1:1 C
3 ea T4-6 X65 .02 - 200 Mc 4:1 C
1 ea "BB" Homebrew Splitter to connect two receivers to the preselector.
http://dxing.info/equipment/rolling_your_own_bryant.dx
Variable Capacitors
2 ea Jackson Brothers Air Variable - 9-365pF
Knobs
5 ea Mouser 450-1171
Vernier Dial
1 ea Ocean State Electronics VD112-10 1-1/2" 0-10
1 ea VD112-10 0-10 vernier dial on hand
Enclosure
1 ea Hammond, Digi-Key HM345-ND Useable space, 9.8750� X 6.625� X 3.8750 � (250.825mm X 168.275mm X 98.4250mm)
Advertised space is: 10" x 8" x 4" (254mm x 203.2mm x 101.6mm)
Switches
3 ea miniature SPST On/Off
1 ea SPDT On/Off/On
1 ea Rotary switch 3 pole 4 pos 10YX034 2 poles/3 pos used
2 ea Rotary switch 1 pole, 12 pos, on hand, 5 pos used
Active Devices
1 ea green LED preamp power indicator
1 ea Mini-Circuits MAR-6 Monolithic amplifier, or
1 ea Ransey SA7 wideband amp.
1 ea 78L05 for MAR-6
1 ea 78L12 for SA7
Potentiometers
2 ea Mouser 17 mm, carbon, 5K pots 31CN305
Connectors
5 ea Chassis BNC
1 ea Power connector
Power Supply
1 ea http://store.yahoo.com/webtronics/136ampdcrepo.html CSI1862, 13.8V 6A for powering:
Betts Preselector
Icom R75
Palstar R30C
MFJ1024 Active antenna
Amrad LF/MW/HF Active antenna
