Webmaster's Page
I enter the QRPHB/SWL HomeBuilder site via this page. It has some often used resources for designing and
analyzing circuits plus sourcing and ordering parts.
Although most of the parts link to Digi-Key, basic information about the
part is provided by Digi-Key for searching other parts suppliers
or cross referencing.
This isn't really intended to be a major public page for the QRPHB/SWL web site
since it contains my personal links and trends towards self-indulgence.
RF Transistor Data Spreadsheets
Parts
- W8DIZ Toroid Page Diz is the Toroid King - Kits and Parts is one stop shopping for many RF parts
- Transistors
- IFR510 from Digi-Key
- J310 from Digi-Key * Obsolete part *
- SMT J310 from Digi-Key MMBFJ310LT1G
- 2N3904 from Digi-Key
- 2N3906
-
RF Capacitors
1000 pF RF cap with C0G TC Good for bypass in VFOs where temperature is critical - Monolithic ceramic capacitors from Digi-Key. These are the main RF caps I use I use 100v, C0G TC whenever possible
-
- RF Trimmer caps
- 6.0-50 pF Murata I use these for tuning double tuned band pass filters
- Miscellaneous
- Mini pots for experimenters Drop right into an Ugly Constructed board; not cheap, but reusable! Knobs=450-1743-ND
- TO-92 package 5 volt (pos) regulators - 100 mA
- 2N7000 MOSFET switch in a TO-92 package
- LM555 Cheap 555 timer
- LM339 LM339N IC COMPARATOR QUAD 14-DIP
- Crystals
- 3.579545MHz Crystal for 60 Hz time base ±30ppm, 18pF load C
- 32.768 kHz time base crystal ±20ppm 12.5pF LC
- Crystal for the EMFRD Frequency Counter- 3.2768 MHz
- Mouser
- Digi-Key They actually do not have the 3.2768 MHz crystal, but have a 3.276 MHz crystal by ECS with the same specs
- 4000 Series Logic
- MC14070B Quad Exclusive OR Gate Datasheet
- CD4013B Dual D Flip-Flop
- CD4049UB CMOS Hex buffer/inverter Datasheet
- HEF4093BP NAND Gate - Schmitt Trigger Datasheet
- 4027 Dual JK Flip Flop
- CD4001 QUAD 2-INPUT NOR GATE
- CD4017BE CMOS decade counter
- 4518 BCD up counter Dual 16 pin
- CD4511 7 segment LED driver/decoder
- CD4046B PLL
- CD4543 7 segment LED driver/decoder
- 4028 IC decoder BCD-DEC
- 4011 Quad NAND gate
- 4023 Triple NAND gate
- CD4021BE shift register
- MC14553BCPG BCD 3 digit counter 16 pins
- 4060 14-bit binary counter
- 4021 8-bit shift register
- 74HC Series Logic
- 74HC86N IC GATE EXCLUSIVE OR QUAD 14-DIP
- MM74HC74AN D Flip-flop Datasheet
- 74HC73N JK Flip-flop
- M74HC390B1R DECADE COUNTER DUAL 16-DIP
- 74HC4060N COUNTER 14-STAGE BIN OSC 16-DIP
- 74HC138 IC DECODER 3-8 LINE EXP 16-DIP
- TC74AC00PF IC GATE NAND QUAD 2INP 14-DIP
- 74HC14N Inverter with Schmitt Trigger
- Popcorn CMOS Analog Switches
- I consider the 4052, 4053 and 4066 "popcorn quality" mixers because they are slower and have a higher ON-resistance (say 100 ohms or so) than the high speed bus switches used in high-end rigs like the K3 and Triad receivers. Even a lowly silicon diode will have just a few ohms ON-resistance when conducting. The following 74HC/4000 series ICs are DIP - okay for some popcorn receivers.
- 74HC4053 Datasheet for 4053
- 74HC4052N Datasheet for 4052
- MAX4066CPD+-ND Datasheet for 4066CPD+ Application note
- Leaded bus switches are apparently no longer made. If you can find some cheap, consider buying them. Pericom
- 7 Segment Digits
- 3 digit common anode Datasheet
- 4 digit common cathode
- 1 digit common anode
- 1 digit common cathode - get common cathode if you are driving a 7-segment digit with a 4511
- SMT Parts
- SOIC prototyping boards called "Surfboards"
- 8 pin search their site for more
- 16 pin
- SOT-89 3 pin break out board
- SMT FET Bus Switches for Mixers Low on-resistance
- CBT3306 Dual FET bus switch SOIC Datasheet
- CBT3125 Quad FET bus switch SOIC
- Op amps
- 5532
-
LMC662
CMOS Dual op-amp ideal for operation from a single supply. Operates from +5V to +15V and features rail-to-rail output swing.
Datasheet
- TDA7052 AF power amp IC. A potential replacement for the LM386. There is also a SMT version . Datasheet
- AF caps for filtering and such
- Miniaturized Metalized Polyester Film Capacitors search around these pages for different caps
- Diodes
- BAT46 DIODE SCHOTTKY SS 100V DO35
- RF Transistors
- BFG135,115 --- TRANS NPN 150MA 15V 7GHZ SOT223
- NE46134-T1-AZ -- TRANSISTOR NPN 1GHZ SOT-89 2SC3357 etc.
- Varactors
- MMBV609LT1G
- SMV1236-011LF
- SMV1234-011LF
- IR Emitters
- TSKS5400S 60 degrees viewing angle 100 mA forward current . Popular modern part
- Die Cast Aluminum Box
- MPJA Marlin P. Jones & Assoc, Inc. Great site for chassis parts, connectors and more
- IR Detectors - Diode and transistor
- BPW34 Digi-Key BPW34 Mouser Photodiode
Online Tools
- OptLowpass™ Design of transmitter output low-pass filters by James. W4ENE
- Standard resistor and cap values
- Best inductive/capacitive reactance calculator on the web Plus other great tools via menu
- resistive pad attenuator calculator good app
- Simple Sallen-Key low pass filter calculator for op amps Plus countless other useful calculators under "Electronics"
Webmaster's Links
- Surplus-electronics-sales Contact is Trixie - very reputable people
- Lees Electronics - Located in North Vancouver BC - (for Canadians)
- PA3AKE's links
- European Radio Clubs
- Smith Chart information
- RF Coax cable data and specifications
- Debco Electronics - Great selection of small quantity parts including VHF toroids
- Receiver Concepts for Dummies -- Stephan Großklaß Great links and text
- High Performance Mixers
- Bus switches such as FST3125 or SPDT switches like the FSA3157 etc are surface mount and not popcorn parts. They are being used in incredible H-Mode mixers. Some favorite links follow for study purposes.
- Arnim Rudder, 9Y4AR
- Andy Talbot G4JNT
- Martein, PA3AKE
- Tube Guitar Amp
- Ceriatone tube amp kits
- Occasionally, I rebuild a blown solid state rectifier circuit for tube amp players. Here is the diode I currently use. Nice.


