|
HC49U crystals look like this. The S version is a short version. As Ashhar mentioned, grounding the case may have little effect on bandwidth. I wouldn't worry too much about it. Just make sure you get fundamental and not third overtone crystals. On Thu, Dec 22, 2022 at 8:16 PM Aaron K5ATG via <k5atg=[email protected]> wrote: Thanks for the help Jerry. How do I know if I have HC49 crystals?? -- Jerry, AC9NM ÊÖÖеÄÄñÔÚ¹àľ´ÔÖÐÖµÁ½¸ö --
Jerry Ponko, AC9NM |
|
Aaron, The crystals have four pins of which two can be grounded, you can leave them out as well. I havent noticed much difference either way. - f On Fri, Dec 23, 2022, 6:18 AM JerryP <jponko@...> wrote:
|
|
Aaron, Type HC49/U/S cases can grounded by soldering a wire to the top of the HC49 case to ground. If they're smd crystals, they usually have a couple of ground pads. On Thu, Dec 22, 2022 at 5:53 PM Aaron K5ATG via <k5atg=[email protected]> wrote:
-- Jerry, AC9NM ÊÖÖеÄÄñÔÚ¹àľ´ÔÖÐÖµÁ½¸ö --
Jerry Ponko, AC9NM |
|
My health is still hit-and-miss but I need to get some progress on my sBITX. I look at the schematic and wonder if I have gotten in over my head. I think that building the sBITX for my first homebrew project may be beyond my reach. I have a couple of questions (for now) concerning the crystal filter schematic above.? 1) All of the crystals that I have seen have two leads on them. In the schematic above they have 4 legs. Am I seeing this correctly? 2)What type of jack is J7? -- '72 Aaron K5ATG |
|
Re Run Of uBitx Enclosure
Hi Friends .
Lately I am getting inquiries for our ubitx nextion enclosures. So it's been decided to re launch them back .? So we will have the 2.8, 5 inch and the new 7 inch nextion display case with our old popular agc circuit . We may substitute the analogue meter with the oled display meter. But the the space available could also be used for analogue meter . We are also thinking of adding fitting for? the WA2EBY amp? and 100 watt Automatic Antenna Tuner to the enclosure. The enclosure would be interesting with the ubitx and what ever firmware is used .? I would be glad to hear any feedback or suggestions on the enclosure design . It gives me immense pleasure to provide our products at inkits which we have been doing over a decade . In this coming new year we shall be coming out with some new products . Thanks and best wishes? Sunil vu3sua https://amateurradiokits.in? |
|
Mic preamp board SSM2167works nicely.
This preamp makes a HUGE difference. Here is my version of the SSM2167 mic preamp/compressor for the uBitx v6. I used it with the supplied Baofeng microphone and it worked well checking into the WPSS evening net on 3952 KHz. After adjusting the gain, gate and compression (not too much!) I got good audio reports, and much better that with the microphone alone. I followed the project according to KI7OJL's implementation (??but printed my own box, and used a small L78L05 I had lying around in a TO92 case. No need for a big TO220 unit.?
|
|
Saved by the hidden fuse in ubitx V6 ;-)
I have a bunch of Raduinos with both V5 and V6 headers (2 extra pins) that I was swapping around to check that the KD8CEC LCD functionality still worked with a Pico and Teensy processors.
Well, I plugged a V5 into a V6 *aligning it with the extra pins* (so everything was offset by 2 pins). Magic smoke! (Daughter thought that we had a gas leak lol). After disassembly, discovered that the copper trace to12v in to on/off switch was literally toast and had actually burned out like a fuse at one point. :-) Jumpered a wire over the virtual fuse and everything "so far" seems fine. Will check again tomorrow, but receive appears to work and I was copying some cw. :-)? Hopefully I got lucky... 73 Mark -- AJ6CU KD8CEC 2.0, Nextion Screens,? and open source uBITX Raduino boards for Arduino IOT, BLE, RP2040, Teensy 4.0, and Raspberry Pi Pico https://github.com/aj6cu |
JerryP
Aaron K5ATG
Sunil Lakhani
N8DAH
John Terrell, N6LN
