WB6BYU 80 Meter Receiver

The WB6BYU 80M Receiver is a simple direct conversion receiver that was featured in the September 2005 issue of QST Magazine. Uses include both ARDF (Amateur Radio Direction Finding) and tracking down interference. The design allows front panel tuning of more than 100 KHz. The only calibration required is to adjust the loop antenna to resonance, adjust the local oscillator for the desired center frequency, and adjust the sense antenna pot.

Included with each order is a copy of the September 2005 QST article, A Simple Direction Finding Receiver for 80 Meters by Dale Hunt, WB6BYU (Reprinted with permission, copyright ARRL)

Note: The first set of kits that were shipped out had an extra 100 Ohm resistor and was missing a 470 Ohm resistor for R19. The 100 ohm resistor will work in place of the 470 ohm resistor but might have too much gain and cause oscillation. If you ordered a kit and need the proper resistor, email me and I'll send it out. Also note that the polarity of C23 is correct on the PCB but wrong on the schematic.

Click here for Construction and Troubleshooting Notes..

 Kit Prices
Assembled/Tested Sold Out  $135.00
Complete Kit (includes Kits 1 - 3) Sold Out  $75.00
Kit 1 - PCB and Parts Sold Out  $25.00
Kit 2 - Chassis and Parts Sold Out  $45.00
Kit 3 - Loop/Sense Antenna Parts  $10.00

To order, payment can be made by check, money order, or PayPal (my email address is my PayPal ID.) The total due will be the kit price(s) plus $6.50 for shipping to US addresses. International orders, please email me for pricing (I usually ship USPS Global Priority Mail.) Please email me first to confirm what kits you are purchasing. My callbook address (KE6HTS) is good and my email address is: .

Note: This kit is provided with permission from Dale Hunt, WB6BYU


 PCB and Parts
Qty P/N Designation

8
.01 uF C1-C4, C6, C8, C28, C29

1
220 uF, 16V C5

3
4.7 uF C7, C26, C27

3
100 pF C9, C10, C24

2
180pf Mica/NPO/PS (value dependent on L4) C11, C12

1
220 pF C13

1
100 pF Trimmer Cap C14

3
.1 uF C15, C21, C25

4
47 uF C16, C17, C20, C22

3
10 uF C18, C19, C23

4
1N4148 Diode D1-D4

2
MV209 Varacter Diode D6,D7
 1  12 - 20 uH Inductor L4

5
2N2222 or 2N3904 Q1-Q5

1
LM2931, TO-92 U1

1
LM386, 8-Pin DIP U2

2
100 R5, R18

2
10 R20, R21

3
100K R11, R16, R22

3
10K R1, R2, R17

1
10K Trimpot R23

2
1K R13, R24

1
2.2K R14

4
22K R3, R9, R10, R15

1
47 R32

2
470 R6, R19

1
47K R8

1
FT-37-43 Ferrite Core T1

18"
Enameled Wire for T1, Red ---
 18"  Enameled Wire for T1, Green  ---
 4" Black Wire (for Sense Antenna Connection)  ---

4"
3 Conductor Shielded Cable (Tuning pot) ---

6"
3 Conductor Shielded Cable (Gain Control) ---

4"
2 Conductor Shielded Cable (Audio Out) ---

6"
2 Conductor Unshielded Cable (Sense Sw.) ---

1
9V Battery Lead ---

1
PCB ---


 Chassis and Parts

Qty P/N Designation

1
LMB 780 Chassis w/all holes drilled ---

1
SPST Pushbutton (Sense) S1

1
SPST Switch (Power) ---

1
3.5mm Phono Jack ---

1
50K Pot (Gain) R4

1
100K Pot (Tuning) R12

4
Standoffs, 4-40 M/F x 5/8" ---

4
4-40 x 3/8" Machine Screws ---

4
4-40 Nuts ---

2
Pot Knobs ---

1
Front Panel Decal ---

1
 Clear Label ---

1
9V Battery Holder ---

4
Rubber Feet ---

Note: Many thanks to John Munsey, KB3GK, for his comments on the design of the case.


 Antenna Loop/Sense
Qty P/N Designation

1
John Guest Fitting, P/N PI0412S ---

2
3/4" Cable Clamps ---

24"
RG-174 Coax L2

24"
Yellow Wire L3

7'
Black Wire L1

 1
 3/8" x 18" Plastic Tubing ---

1
3/8" x 1/2" Plastic Tubing ---

1
1/4" OD x 1/8" ID Rubber Grommet ---

1
1/2" OD x 3/8" ID Rubber Grommet ---

2
4" Tie Wraps ---

1
 Orange Wirenut ---

8"
1/8" Aluminum Rod ---

2
6-32 x 3/8" Machine Screws ---

2
6-32 Nuts ---


Revisions/Notes

Oct 25, 2006 - Updated cost for assembled and tested units.

Jan 26, 2006 - Updated shipping costs.

Oct 22, 2005 - Updated price list, shipping, and the construction notes.

Aug 19, 2005 - Click here for additional comments from Dale about conversion of this receiver to 40M.

Aug 26, 2005 - This website has been down for a day or so due to ISP problems. The site came up again last night and Email just came up again this morning. The delivery of the enclosures has been delayed and the latest delivery schedule is early next week. The value of C11 and C12 were corrected to match the value of L4 being used.

Sept 13, 2005 - The enclosures arrived on Friday afternoon, September 9. I had expected to start shipping today, but double checking to make sure everything is correct delayed things. The units will start being shipped tomorrow (Wednesday, Sept 14) including the assembled and tested units.

Sept 14, 2005 - Construction Notes added (see bottom of parts list.) Everything checked out fine and units will be starting to ship today.

Sept 20, 2005 - Construction Notes have been modified to reflect the jumper needed for L4 when using the inductor from Dan's Small Parts.


This page updated on Tuesday, April 3, 2007 at 16:00 PDT