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 links are from Digi-Key, basic information about the
part is provided by Digi-Key and can be extrapolated for searching other parts suppliers
or cross referencing.
This is really not intended to be a major public page for the QRPHB/SWL web site
as it contains my personal links and perhaps is a little self-indulgent.
My electronic work bench cats page. If you have a cat who helps out on your work bench, please send me a photo.
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
- 2N3904 from Digi-Key
- 2N3906
-
RF Capacitors
1000 pF RF cap with C0G TC Good for bypass in VFOs where temperature is critical - Multi-layer, monolithic ceramic capacitors from Digi-Key. These are the main RF caps I use I use C0G TC whenever possible
- Smaller value C0G ceramic caps; 10 pF and less. Good for linking double tuned circuits and VFO tanks
- 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!
- TO-92 package 5 volt (pos) regulators - 100 mA
- 2N7000 MOSFET switch in a TO-92 package
- LM555 Cheap 555 timer
- 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
- 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
Online Tools
- 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"
- Good collection of datasheets from Jaycar
Webmaster's Links
- Radio
- Renaissance of DC Receivers - pdf
- PA3AKE's links
- European Radio Clubs
- Smith Chart information
- RF Coax cable data and specifications
- HAM Radio Forum
- EEV Blog - Dave's passion and knowledge is inspiring
- Anatek corporation Now this is where I want my family to buy gifts for me!
- Rod Elliot's ESP Site Good audio content. Rod's articles on lamps are most interesting as well
- WSJT Home Page - Joe's, K1JT site This man is a giant in physics and radio electronics
- 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.

