Meta tags:

Headings (most frequently used words):

2023, for, saturday, 2022, sunday, april, march, monday, blog, simple, meter, clock, the, speaky, hf, ssb, transceiver, and, other, homebrew, projects, pages, june, 25, 29, 01, 05, november, 19, october, 03, 21, tags, on, articles, subscribe, this, me, followers, archive, esr, capacitance, 32, 768khz, oscillator, interdigital, bandpass, filter, 2ghz, 23cm, high, voltage, supply, tube, valve, tester, arduino, bootloader, burner, external, pll, reference, redline, wl, twin, lnb,

Text of the page (most frequently used words):
the (123), for (37), and (32), meter (16), october (15), march (15), was (15), november (14), april (14), vhf (14), september (13), december (13), june (13), #reference (13), may (12), receiver (12), from (12), arduino (12), have (12), equipment (11), august (10), february (10), power (10), lnb (10), july (9), comments (9), this (9), vfo (9), with (9), antenna (9), radio (9), filter (9), that (9), january (8), ricardo (8), ct2gqv (8), supply (8), signal (8), not (8), one (8), crystal (8), day (8), testing (7), shack (7), frequency (7), etiquetas (7), publicada (7), por (7), used (7), nice (7), here (7), simple (6), si570 (6), mhz (6), transceiver (6), some (6), generator (6), external (6), output (6), different (6), bellow (6), original (6), top (6), 2023 (5), electronics (5), pll (5), transmiter (5), amp (5), schematic (5), tube (5), test (5), pcb (5), airband (5), build (5), preamp (5), voltage (5), 100 (5), other (5), oscillator (5), 102 (5), after (5), you (5), also (5), will (5), 2022 (4), view (4), posts (4), valve (4), cable (4), projects (4), programmer (4), aprs (4), solder (4), 107 (4), 2ghz (4), during (4), still (4), place (4), where (4), part (4), terminals (4), diagram (4), need (4), construction (4), burn (4), bootloader (4), via (4), similar (4), homebrew (4), clock (4), blog (3), but (3), linux (3), all (3), atom (3), preamplifier (3), 144 (3), first (3), capacitor (3), idea (3), uhf (3), load (3), adapter (3), time (3), f7e (3), interface (3), control (3), board (3), display (3), standard (3), ssb (3), speaky (3), pic (3), bandpass (3), audio (3), resistor (3), internal (3), tester (3), ads (3), ohm (3), since (3), input (3), another (3), inside (3), 25mhz (3), works (3), bottom (3), upload (3), just (3), then (3), https (3), section (3), only (3), high (3), saturday (3), dimensions (3), scale (3), switch (3), changed (3), 2014 (2), esr (2), computer (2), mechanics (2), subscribe (2), zener (2), using (2), uv916 (2), usb (2), based (2), dummy (2), trevo (2), transmitter (2), dbm (2), calc (2), linear (2), jbot (2), swr (2), squelch (2), speaker (2), box (2), satelite (2), mc3361 (2), programing (2), pound (2), shop (2), tracker (2), stand (2), panel (2), receivers (2), php (2), mini (2), crt (2), tool (2), light (2), led (2), jbc (2), iron (2), gps (2), buffer (2), method (2), counter (2), demodulator (2), electronic (2), divide (2), bf981 (2), batery (2), tnc (2), tuner (2), band (2), 5mhz (2), 28mhz (2), converter (2), image (2), bit (2), warming (2), adjust (2), plugs (2), future (2), good (2), enough (2), having (2), connected (2), tried (2), adf4351 (2), remove (2), don (2), removed (2), chip (2), had (2), there (2), can (2), than (2), side (2), left (2), decided (2), monday (2), arduinoisp (2), target (2), socket (2), isp (2), end (2), are (2), now (2), got (2), filament (2), circuit (2), like (2), added (2), small (2), get (2), separate (2), positive (2), negative (2), ranges (2), main (2), online (2), results (2), outcome (2), range (2), sunday (2), 768khz (2), possible (2), found (2), give (2), pot (2), capacitance (2), theme, powered, blogger, 2006, 2008, 2009, 104, 2010, 2011, 2012, 2013, 2015, 2016, 2017, 2018, 2019, 2020, 2021, archive, followers, complete, profile, studied, school, dedicated, myself, telecommunication, industry, enthusiastic, unix, opensource, derivatives, taste, auto, bicycle, vlf, use, bfr91, lcd, callsign, vectron, variable, part1, part0, yagi, uda, blox, trimble, transverter, tp5, toroid, info, inductance, tip, holder, pulse, temperature, telrad, telemobile, hx340, teensy, tech, ta7358, lm3914, plug, spectrum, analyzer, sommerkamp, tests, soldering, solar, charger, software, skylab, sinad, si5351, sdr, scalar, network, analyser, sailor, rtty, probe, repairs, repair, regenerative, raspberry, quiz, pto, psk, harvesting, pic16f88, under, packet, decoder, helping, hand, park, air, topics, osd, oscilloscope, notch, fllter, ham, noise, aligment, news, neo, ne567, tone, encoder, repeater, access, navtex, multiple, whip, microwave, mfj, max7219, manhattan, style, pad, magic, eye, lxi, lm567, lm35, dimmer, limiter, lead, free, laser, laboratory, t245, impedance, measuring, interference, instrument, remote, ideas, microphone, splitter, preselector, hacks, grig, module, gpib, generators, fixed, 817, 707, 307, front, labeling, fishing, exhibit, photos, ferrite, controller, experiments, prototype, ecc82, downconverter, discriminator, out, digital, modes, voltmeter, components, bubble, blogs, bitx, bfo, bench, protection, implemented, attenuator, apt, quadrifilar, helix, tinytrak, mysql, aoyue, 2663b, amplifier, modulator, aircraft, mixer, ad8307, 78xx, reverse, polarity, 6500k, dowconverter, 058, overtone, 20a, 10mhz, 10ghz, 500, khz, tags, articles, home, older, convertion, drifting, wavetek, drift, fine, being, done, actual, times, 390, jumper, wire, two, big, blobs, let, see, how, stable, ad4351, avoids, tcxo, terminal, normally, bridged, missing, case, externally, injecting, parallel, success, took, smd, tools, placed, waited, underlying, until, could, note, voids, warranty, ones, were, rda3567, mods, made, mod, cap, line, completion, operation, confirm, does, work, more, moment, accepts, around, 10dbm, inject, besides, shift, ref, higher, 787mhz, needed, right, plastic, metal, cover, station, try, convert, common, satellite, redline, twin, ino, code, connects, going, programmed, zif, facilitates, insertion, atmega, great, uploading, select, port, type, result, instruction, docs, built, examples, spare, atmega328, chips, programed, specially, prices, boards, inflation, order, program, least, later, ide, burner, finished, metering, full, set, eventually, something, working, internals, relay, controlled, accidentally, zapped, constantly, press, enable, button, transformer, each, supplies, meters, adaptations, allow, fr4, double, sided, sides, brass, elements, example, regarding, best, optimization, attenuation, bad, either, considering, greatest, dimensional, andards, www, changpuak, interdigital_bandpass_filter_designer, details, keptenkurk, wordpress, com, 1090mhz, project, include, pass, interdigital, 23cm, ideally, diving, same, number, tick, low, less, faster, per, flies, assembly, planing, any, who, knows, those, round, crystals, wrongly, printed, should, making, easiest, way, scan, face, edit, editor, 100pf, 1nf, 10nf, 100nf, 1uf, diodes, 10k, series, better, adjustment, description, calibrate, 68pf, 27pf, highest, precision, position, certain, about, unmarked, capacitors, youtube, video, started, building, before, behaving, correctly, latter, problem, vk3ye, title, says, provision, self, disconnects, connect, internally, know, values, rotary, minimum, nothing, smaller, add, zeroing, r24, handy, old, caps, site, almost, copy, visitors, links, utils, pages, antennas, etc,

Text of the page (random words):
the speaky hf ssb transceiver and other homebrew projects the speaky hf ssb transceiver and other homebrew projects homebrew of radio equipment antennas tuner etc pages blog utils links visitors sunday june 25 2023 simple esr meter almost a copy from here only added provision for self test that is the switch disconnects the terminals and connect internally to know resistor values via rotary switch minimum 2 ohm since had nothing smaller at the time also add zeroing via a pot on r24 place diagram from the original site inside and during testing works nice handy for testing old caps have a nice day publicada por ricardo ct2gqv em 10 24 pm no comments etiquetas shack equipment test equipment saturday april 29 2023 simple capacitance meter as title says a simple capacitance meter one youtube video by vk3ye was enough to get me started building after all the meter that i was using before was not behaving correctly latter found the problem the outcome was this scale on the left switch is wrongly printed where is x2 should be x0 5 divide by 2 during build making the scale the scale on the meter was changed from the original 0 50 to 0 100 the easiest way was to scan the original face place and then edit on a image editor to calibrate i used a 68pf and 27pf capacitor the idea was not to have highest precision possible only to be in a position of having certain about unmarked capacitors some description schematic from here and here i used different ge diodes and the 10k pot was changed for 2 of 5k in series to give better adjustment range the zener was changed to 6 8v ranges like this e 100pf d 1nf c 10nf b 100nf a 1uf have a nice day publicada por ricardo ct2gqv em 1 23 pm no comments etiquetas meter shack equipment test equipment saturday april 01 2023 clock for a clock 32 768khz oscillator not planing to build any electronic clock but who knows just found one of those round clock crystals and decided to give it a go the diagram and assembly the output ideally it will be 32 768khz so that diving for the same number will tick at 1s as low as it was possible to adjust it will be less than 1s faster per day time flies have a nice day publicada por ricardo ct2gqv em 10 07 pm no comments etiquetas oscillator sunday march 05 2023 interdigital bandpass filter for 1 2ghz 23cm part of a project on 1 2ghz that will include this band pass filter main dimensions got online via the tool here https www changpuak ch electronics interdigital_bandpass_filter_designer php some details of similar construction for different frequency range ads b here https keptenkurk wordpress com 2014 11 05 a homebrew 1090mhz ads b filter my construction used fr4 double sided pcb for the sides and brass for elements bottom and top online results example for dimensions and the outcome regarding results not the best optimization for attenuation but not bad either considering the dimensions and construction not to the greatest dimensional andards have a nice day publicada por ricardo ct2gqv em 3 31 pm no comments etiquetas 1 2ghz filter saturday november 19 2022 high voltage supply for tube valve tester a power supply for a future tube valve tester main circuit for the positive side is similar to the one bellow the top section the filament circuit is similar to the bottom section the negative supply is similar to the diagram bellow standard with small adaptations to allow 2 different ranges there s a separate transformer for each of the supplies the filament the positive and the negative also other separate on to power the voltage meters was added a small relay controlled high voltage supply output so i don t get accidentally zapped you need to constantly press enable button to have high voltage output at the terminals the internals finished here working during testing now i still need the tube socket and metering part for the full valve tube test set eventually something like this only the top section have a nice day publicada por ricardo ct2gqv em 3 50 pm no comments etiquetas power supply shack equipment monday october 03 2022 arduino bootloader burner i have some spare atmega328 chips that are not programed and can be used in some projects specially now the prices arduino boards got some inflation in order to upload the program to the ic s you will need to burn first the bootloader at least so that later you then upload via de arduino ide schematic and instruction are from here https docs arduino cc built in examples arduino isp arduinoisp end result bottom arduino is the programmer where you upload the arduinoisp ino code it connects to the arduino on top target that is going to have the chip to be programmed burn the zif socket on the target arduino just facilitates the insertion of the atmega ic another view for uploading select the arduino programmer usb port and then the programmer type arduino as isp in the end just burn bootloader after bootloader burn have a great day publicada por ricardo ct2gqv em 10 12 pm no comments etiquetas arduino shack equipment monday march 21 2022 external pll reference for redline wl 2 twin lnb as part of the construction of a qo 100 station decided to try and convert a common satellite lnb from internal pll crystal reference to an external one on the image during testing after the convertion was still drifting a bit since the wavetek signal generator used was still warming up this is the inside of the lnb after plastic and metal cover removed another view bellow the crystal oscillator is on the other side of the pcb so it s needed to de solder the f plugs terminals top left and right after completion of the operation i can confirm it does work still need to do more testing with different input signal reference at the moment it accepts works from around 10dbm to 0 dbm also tried to inject different reference besides the 25mhz to shift the if and works with ref higher than the 25mhz bellow testing with 25 787mhz as the pll reference the drift is the fine adjust being done on the signal generator the actual lo lnb frequency is the crystal frequency times 390 the mod bellow i also had to remove one cap from the input line to the output filter so that there is no load to the reference signal in the jumper wire is from one of the lnb external output plugs to the place where the crystal was the two big blobs of solder this is the original schematic it s a rda3567 chip on the lnb board with the mods made the capacitor used was one of the ones that were connected to the 25mhz crystal on the original diagram to remove the original crystal since i don t have smd tools i placed the iron with a bit of solder on top of it and waited for warming up the underlying terminals until it could be removed note this voids the warranty another view of the lnb inside i also tried injecting on the lnb a parallel signal from the reference oscillator in the adf4351 generator board to good success bellow the part where i took the signal from the adf4351 reference i connected to the terminal normally used for the reference input and bridged the missing place for the 0 ohm resistor case you reference it externally let s see in the future how stable is this internal reference of the ad4351 if good enough it avoids having to build an external tcxo for the lnb have a nice day publicada por ricardo ct2gqv em 5 56 pm no comments etiquetas qo 100 older posts home subscribe to posts atom tags on articles 0 500 khz converter to 4 mhz 1 1 2ghz 1 10 7 mhz fm if tx 1 100 w dummy load 1 10ghz 4 10mhz 1 13 8v 20a power supply 1 14 058 mhz fm if tx overtone at 28mhz 1 144 to 24 mhz dowconverter 1 144 to 28mhz converter and the si570 1 2m 1 5 5 5mhz vfo 1 5 5 5mhz vfo buffer 1 50 mhz 3 6500k 2 75 ohm cable 1 78xx on reverse polarity 1 a different vfo control 1 ad8307 power meter 4 ads b 1 airband first mixer 1 airband preamplifier 1 airband receiver 8 airband receiver squelch 1 aircraft band receiver 1 am demodulator 2 am modulator 2 am receiver 2 am transceiver 1 amplifier 1 antenna 4 antenna tuner 4 aoyue 2663b 1 aprs tnc 1 aprs tnc to mysql 1 aprs tracker tinytrak 1 apt satelite quadrifilar helix antenna 1 arduino 16 attenuator 2 audio 3 batery protection an implemented idea 1 batery tester 1 bench audio amp 1 bf981 vhf preamp 1 bf981 vhf preamp 2 1 bfo for hf radio 1 bitx 7 blogs 1 bubble display 1 components 1 computer 1 crt 2 crystal radio 1 dc voltmeter 2 digital modes interface 1 discriminator out of mc3361 1 display 1 divide by n frequency 1 downconverter 2 ecc82 1 electronics 2 electronics prototype method 1 experiments 23 external vfo controller for the ft 102 1 ferrite antenna preamp 1 filter 10 fishing electronic equipment exhibit photos 1 fm 1 fm demodulator 2 fm receiver 1 fm transmiter 2 fm transmitter 1 frequency counter 4 frequency counter from pound shop radio 1 front panel labeling method 1 ft 102 1 ft 102 if output buffer 1 ft 107 1 ft 307 4 ft 7 1 ft 707 11 ft 817 1 fv 107 1 fv 107 fixed crystal frequency 1 fv 107 to ft 102 external vfo fv 102 2 generators 3 gpib 8 gps 3 gps module 2 grig and th f7e 1 hacks 1 hf 4 hf an vhf preselector 1 hf antenna splitter 1 hf bandpass filter 1 hf radio microphone 1 hf swr meter 2 hf radio 1 ideas 6 instrument remote control 3 interference 1 internal impedance measuring 1 iron stand 1 jbc 1 jbc t245 1 jbot an 5w hf linear amp 1 laboratory 1 laser 1 lead free solder 1 led 2 led limiter resistor calc 1 lf 1 light 4 light dimmer 1 linux 1 lm35 1 lm567 1 lnb 1 lw 1 lxi 1 magic eye 1 manhattan style pad tool 1 max7219 1 meter 4 mfj meter adapter 1 microwave 2 mini crt 5 mini whip antenna preamp 1 multiple receivers on one antenna 1 navtex 2 ne567 tone encoder for repeater access 1 neo 7m 1 news 51 noise generator for filter aligment 1 not ham radio 2 notch audio fllter 1 on an lc bandpass filter for receivers in php 1 oscillator 14 oscilloscope 4 osd 1 other topics 34 panel meter 1 park air electronics 1 pcb helping hand 1 pcb stand 1 pic 1 pic based packet decoder 1 pic programmer for aprs tracker 1 pic16f88 programing under linux 2 pound shop radio 1 power harvesting 3 power meter 1 power supply 15 programing cable for th f7e 1 projects 1 psk interface 1 pto mechanics 1 qo 100 3 quiz 4 raspberry pi 3 receiver 13 reference 1 reference voltage 1 regenerative 2 repair 4 repairs 19 rf preamp for the hf radio 1 rf probe 1 rtty 3 s meter for the mc3361 1 s9 signal generator 3 sailor 1 satelite 1 scalar network analyser 2 sdr 2 shack equipment 89 shack speaker box build i 1 shack speaker box build ii 1 si5351 2 si570 1 si570 vfo 1 signal generator 4 simple squelch for airband receiver 1 sinad 1 skylab 1 software 1 solar charger 1 soldering 4 some tests 1 sommerkamp 3 speaky hf transceiver 19 spectrum analyzer 2 ssb 4 standard pcb 2 standard plug for equipment power 1 swr meter with lm3914 the display 1 ta7358 2 tech 1 teensy 2 telemobile hx340 3 telrad board 1 temperature control for linear amp jbot 1 test equipment 23 testing cable adapter 2 th f7e pc interface cable 1 the dbm calc 1 time pulse 1 tip holder 1 toroid info and inductance meter adapter 1 tp5 1 transceiver 2 transmiter 1 transmitter 1 transverter 1 trevo 1 trevo transceiver 12 trimble 1 u blox 1 uhf 2 uhf dummy load 1 uhf yagi uda antenna 1 usb sw receiver si570 based 1 uv916 receiver part0 1 uv916 receiver part1 power supply 1 valve tube 7 variable capacitor idea 1 vectron 1 vfo 1 vhf 4 vhf am receiver 1 vhf amp and the fm transmiter schematic 1 vhf amp first schematic 1 vhf antenna for 144 mhz 1 vhf fm receiver with si570 vfo 1 vhf fm transmiter using the si570 21 4 if 1 vhf fm transmiter pll lcd callsign 1 vhf preamplifier 2 vhf preamplifier with bfr91 1 vhf vfo for pll use 1 vlf 2 zener 1 subscribe this blog posts atom posts all comments atom all comments me ricardo ct2gqv studied electronics at school but dedicated myself to computer and telecommunication industry ip enthusiastic of unix and opensource derivatives eg linux taste for auto and bicycle mechanics view my complete profile followers blog archive 2023 4 june 1 simple esr meter april 2 march 1 2022 4 november 1 october 1 march 1 february 1 2021 12 december 3 november 1 october 2 september 1 may 1 march 1 january 3 2020 22 december 2 october 2 september 1 august 3 june 2 may 5 april 3 march 4 2019 8 december 1 november 1 october 1 july 1 june 4 2018 19 december 3 october 2 september 1 august 1 june 3 may 3 april 2 march 2 february 2 2017 27 december 4 november 3 october 6 september 4 august 1 july 1 june 1 may 1 april 3 march 1 february 1 january 1 2016 25 december 1 november 1 october 2 september 1 august 2 july 2 june 1 may 1 april 5 march 3 february 2 january 4 2015 26 december 1 november 3 october 4 july 1 june 5 may 7 april 1 march 1 january 3 2014 20 december 3 november 2 october 3 september 1 august 3 june 2 may 2 april 1 march 1 february 2 2013 46 november 1 september 3 august 1 june 5 may 5 april 6 march 8 february 6 january 11 2012 69 december 8 november 7 october 11 september 6 august 1 july 1 may 7 april 7 march 4 february 11 january 6 2011 43 december 8 november 2 october 1 september 2 april 4 march 9 february 8 january 9 2010 104 december 5 november 6 october 8 september 15 august 5 july 3 june 5 may 8 april 13 march 14 february 15 january 7 2009 76 december 11 november 5 october 8 september 4 august 6 july 6 june 25 may 9 april 2 2008 12 september 1 july 2 june 4 may 4 february 1 2006 27 december 1 november 6 october 1 september 2 august 13 july 4 simple theme powered by blogger