tag:blogger.com,1999:blog-1755879746562139462.post356204876975856322..comments2024-03-22T04:02:41.466+07:00Comments on BLEKOK QRP by YD1JJJ: KOLIBRI 80M DSB-CW 1W TRANSCEIVERINDRA S EKOPUTRO, YD1JJJhttp://www.blogger.com/profile/14674667405489865085noreply@blogger.comBlogger18125tag:blogger.com,1999:blog-1755879746562139462.post-70702750371768394142020-12-26T17:34:37.258+07:002020-12-26T17:34:37.258+07:00Masih memproduksi Kolibri Om..?!
Salam hormat dari...Masih memproduksi Kolibri Om..?!<br />Salam hormat dari Semarang.Anonymoushttps://www.blogger.com/profile/10417514845085623135noreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-58137589220258279002015-11-14T17:24:40.200+07:002015-11-14T17:24:40.200+07:00Explication for QSK circuit. The circuit from the ...Explication for QSK circuit. The circuit from the antenna input-output is using a method that was developed by W. Hayward, alias W7ZOI. Antenna energy is sampled at the collector of the transmitter PA, routed through a series-resonant circuit (tuned to the resonant frequency), and then to the receiver input port. Two silicon diodes shall be included to protect the receiver during the transmit periods (in our case unfortunately we have only one diode). These diodes conduct during transmit and establish an RF level of 0.7 V RMS maximum, which will not harm the transceivers receiver input circuitry. The loss through the series resonant circuit is minimal. The output filter of the PA is inline with the receiver antenna line during receive period, and this is beneficial in adding additional selectivity at the input to the receiver. The C with a value of 68 pF in the schematic must be absorbed int the filter input circuit. Its value has to be substracted from the normal value of the 1st. capacitor of the LPF (820 pF), since it is effectively in parallel vith that C, when protecting antiparalel diodes conduct. 820 - 68 pF - so 752 pF is the correct value. The reactance of C and a series connected L (which is missing in the schematic, but present in the component placement picture, 18 uH), is 450 ohm. For 40 meters that value shall be around 47 pF. A semi variable trimmer 10-70 pF should be right piece to use there. This information can be read also in the W1FB The QRP Notebook.Szilárd1973https://www.blogger.com/profile/05156515434970448908noreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-13864469725284447422015-11-14T17:08:10.157+07:002015-11-14T17:08:10.157+07:00Audio frequency preamplifier is missing from the s...Audio frequency preamplifier is missing from the schematic of Kolibri 1.Szilárd1973https://www.blogger.com/profile/05156515434970448908noreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-83014351505160605672014-03-25T18:11:27.557+07:002014-03-25T18:11:27.557+07:00http://partsandkits.com/minikits/612mixerbsch.gif
...http://partsandkits.com/minikits/612mixerbsch.gif<br /><br />The link above shows a much better muting-audio amplifier stage, which can be adapted to this Kolibri.<br /><br />See also the other circuit from the same author:<br />http://www.kitsandparts.com/minikits/612mixerasch.gif<br />Note, that this Kolibri can be adapted to broad band general coverage receiver and extended to digital broadcast receiver with 12.5 khz output for PC sound card. Vakarcshttps://www.blogger.com/profile/07560078851411534863noreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-28343753026818056272014-02-10T06:53:39.396+07:002014-02-10T06:53:39.396+07:00SA 612 : pin 6-7: 100 picofarads, pin 7-3: 100 pic...SA 612 : pin 6-7: 100 picofarads, pin 7-3: 100 picofarads,pin 6 series with L1: 1 nanofarad.with these values it will work for shure. with the values give in schematic, NO.Vakarcshttps://www.blogger.com/profile/07560078851411534863noreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-14649798592024173182014-02-04T21:12:00.675+07:002014-02-04T21:12:00.675+07:00A definitely WRONG design. The PCB doesn't fol...A definitely WRONG design. The PCB doesn't follow the schematic at all.<br />Main problems in design:<br />1. components not marked properly in schematic nor on PCB,<br />2. transistor count on PCB is more then in schematic (schematic not updated???)<br />3. missing part some values in schematic<br />4. missing voltage measuring points in schematic<br /><br />It is not easy to complete the build process this way, therefor to build this little radio is not recommended. It is supposed to work but it wouldn't. Just a time waste... <br />Please DO NOT PUBLISH such kind of SHIT on internet. There are beginner HAMs around who are not competent in this field ad want to build a simple radio, but they will be just disappointed...<br /><br />p.s.: if somebody ask you a question about the REAL ERRORs in the project it is recommended to answer <br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-66498881158421959802014-02-02T03:09:46.442+07:002014-02-02T03:09:46.442+07:00The PTT PNP transistor 2N3906 is not good at all....The PTT PNP transistor 2N3906 is not good at all. It can not support the current of 6 transistors connected to the line A. For this reason, it should be replaced with an 1 A switching transistor like BC 302 or BD 243 or similar, but the 3k3 an the 10 resistors must be changed too, the double value is recomended.<br />Vakarcshttps://www.blogger.com/profile/07560078851411534863noreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-44884689459585812722014-01-30T05:19:50.302+07:002014-01-30T05:19:50.302+07:00Finally, I found out, where the problem is. This p...Finally, I found out, where the problem is. This pcb and layout is not the good one. If you search on the internet the pcb: kolibri layout2, that is the good one. This one, layout 1, is for information purposes only.I have retro engineerd the pcb and found the component placement order, as the schematic shows.vakarcs szilhttp://www.qrz.comnoreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-44735070490450153242013-01-16T22:08:27.653+07:002013-01-16T22:08:27.653+07:00Driver amplifier connection is a little bit differ...Driver amplifier connection is a little bit different than in the schematics. also power amplifier is a little bit different than in the schematic. One condensator between predriver and driver stage is missing from the pcb. maybe it is not necessary, or it was mounted on the pcb side. Please comment my observations, mister Ekoputro!Vakarcshttps://www.blogger.com/profile/07560078851411534863noreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-41321606348244185202013-01-16T22:03:09.302+07:002013-01-16T22:03:09.302+07:00Left side down transistors: BC 558 pnp. Left side ...Left side down transistors: BC 558 pnp. Left side middel:npn transistor, microphone amplifier. Right side upper: audio preamplfier npn from the SA612(not in the schematic)rx mode, and in tx audio generator for side tone, another npn transistor to the pin 3 LM386: muting transistor npn.Vakarcshttps://www.blogger.com/profile/07560078851411534863noreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-29215048449039117372012-02-19T17:27:32.696+07:002012-02-19T17:27:32.696+07:00In the schematic there is no part going to earth f...In the schematic there is no part going to earth from the A line. In the layout I see a condensator and another part, marked with a circle.that should be a RFC or something else. there is some mismatch from the predriver MSP10 (BF 199) to the final FETs. Missing 10 nF connection from Collector of first stage predriver 2N3904. 5k6 resistor is around C-B, 10 nF, and L3 is connected to C. From Emitter missing 10 nF an 4w7 resistor. L3 is missing.5K6 resistor should go to line A, and not to collector of stage preamp. Missing decoupling 10 nF from stage one to stage nr. 2. L4: that is in my opinion 10 turn bifilar trafo to raise the power. Maybe the trafo on the right side of the layout does not reflect the situation in the schematic.<br />QSk transistor is marked to be between 10uF condensator and 56 mH drossel. In the layout, this is connected direct to pin 3 AFTER the potentiometer. The microphone amplifier: 1 nF to ground - other 100nF to 10k resistor and 22k resistor. common point of C/R/R is goin to 2N3904. Collector gonig to 4K7 transistor, which is going to 10K and 1K and diode. 100nF decoupling condensator is not represented in schematic. I will make a pdf with the corrections. SzilardYO6VSRnoreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-16568972702500240662012-02-18T22:43:17.428+07:002012-02-18T22:43:17.428+07:00Dear Sir, the schematic does not match with the pc...Dear Sir, the schematic does not match with the pcb layout. Please advise if you can post the modified version.Thank youAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-57191409730568929382012-02-18T15:40:11.273+07:002012-02-18T15:40:11.273+07:00You must see the schematic. Thanks.You must see the schematic. Thanks.Indra YD1JJJnoreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-89972047847911325192012-02-18T15:37:53.774+07:002012-02-18T15:37:53.774+07:00It's using single layer PCB.It's using single layer PCB.Indra YD1JJJnoreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-79777512547488417112012-02-14T19:10:03.269+07:002012-02-14T19:10:03.269+07:00Position of Q1-Q7?
Value of Z1/Z2?
Please....
YO6V...Position of Q1-Q7?<br />Value of Z1/Z2?<br />Please....<br />YO6VSRAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-14809035351989348852012-02-11T20:58:23.675+07:002012-02-11T20:58:23.675+07:00Single plated PCB or double plated PCB?Single plated PCB or double plated PCB?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-34532313891001700602011-09-16T14:03:31.505+07:002011-09-16T14:03:31.505+07:00bagaimana kalo burung blekok yang datangkan ne602,...bagaimana kalo burung blekok yang datangkan ne602, biar aku tinggal inden 10 biji saja. soalnya aku dah bel eltech di surabaya juga dak ada. salam yd3 fsi lamongan.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1755879746562139462.post-31726013165603623102011-09-13T15:43:43.182+07:002011-09-13T15:43:43.182+07:00Mas, cari IC NE602 di Surabaya di mana ? harganya ...Mas, cari IC NE602 di Surabaya di mana ? harganya berapa sih ?<br /><br />Thanks.<br />Indra S.Anonymousnoreply@blogger.com