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Re: K5BCQ uBITX Relay Switched LPF/BPF board
¿ªÔÆÌåÓýKees: ? How much is the complete 6x kit? ? David A Posthuma, WD8PUO 1 (616) 283-7703 ? From: [email protected] <[email protected]> On Behalf Of Art Olson
Sent: Thursday, September 13, 2018 4:38 PM To: [email protected] Subject: Re: [BITX20] K5BCQ uBITX Relay Switched LPF/BPF board ? Kees, ? I would like a complete 6x kit ¨C please send paypal request to olson339@... for payment ? 73 Art ¨C N2AJO ? From: [email protected] [mailto:[email protected]] On Behalf Of Kees T ? Yes, on the 6x LPF stuff. Hope it's a more restrained than the AGC/Click mini-kit ordering. ?
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Re: 2N2222A vs 2N3904 sourcing
Kees,
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Otherwise unobtainable plastic 2n2222A's available for pennies on ebay? In this particular case, I'm not so sure about the first part in "Trust, but verify".? But certainly possible, the recipe has been out there for 50 years. Ebay might be worth a shot if you want a bunch. For small quantities on prototypes, I'd just give Mouser their $2 for item?610-2N2222A If you really want a bunch, then Mouser item?583-2N2222A from Rectron is $0.21 each at quantity 10000. All 2n2222A's on Mouser have metal cans, which should dissipate more than anything plastic. Especially if you put some sort of heatsink on them. Or give them a liquid nitrogen bath. There are parts that are better than the 2n2222A's, especially if interested in operating above 20m. Search for 2n5109 in this forum for discussion of that and other parts. Maybe also search for BS170 too, Mouser price of $0.44 for one, $0.12 each for 100.? Jerry ? On Thu, Sep 13, 2018 at 01:18 PM, Kees T wrote:
I think enough work has been done to say the 3 sets of 2N3904 transistors should be replaced with 3 sets of 2N2222A transistors. The 2N2222A is a great transistor but has been around a while and most retailers have classified them as "obsolete" and dumped the plastic versions to surplus dealers to sell. They still sell the TO-18 metal can versions at quite high prices because the military still needs them to repair "stuff". Many surplus dealers now have the plastic 2N2222A parts available for pennies on places like ebay. |
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Re: K5BCQ uBITX Relay Switched LPF/BPF board
¿ªÔÆÌåÓýKees, ? I would like a complete 6x kit ¨C please send paypal request to olson339@... for payment ? 73 Art ¨C N2AJO ? From: [email protected] [mailto:[email protected]] On Behalf Of Kees T ? Yes, on the 6x LPF stuff. Hope it's a more restrained than the AGC/Click mini-kit ordering. |
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2N2222A vs 2N3904 sourcing
I think enough work has been done to say the 3 sets of 2N3904 transistors should be replaced with 3 sets of 2N2222A transistors. The 2N2222A is a great transistor but has been around a while and most retailers have classified them as "obsolete" and dumped the plastic versions to surplus dealers to sell. They still sell the TO-18 metal can versions at quite high prices because the military still needs them to repair "stuff". Many surplus dealers now have the plastic 2N2222A parts available for pennies on places like ebay.
Just FYI 73 Kees K5BCQ |
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Re: Have to adjust master calibration on power up - does not save
Ion,
Hey guys, I am an idiot.? My BFO freq. was way off.? The only way I found out was running Ubitx manager to see the saved setting. There was incorrect data entered at one time or another.? Anyway, I got in some good practice with my small torch removing and installing that Arduino. I have now have it set to 119965 and waiting for band conditions to improve.? I tried listening in on another radio but the distance between the 2 is too short. Thanks for all your help. ? Bob |
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Re: bitx40 on 80
¿ªÔÆÌåÓýAllard, in addition the "high side" injection must be used and chosen, because fin = fLO - Fif; e.g. fin = 3.5 MHz Fif = 12 MHz then fLO = 15.5 MHz. The "low side injection" as used in the BITX40 does not work (fin = 7 MHz, flo = 5 MHz then fif = 12 MHz). Henning Weddig DK5LV Am 13.09.2018 um 00:27 schrieb Allard
PE1NWL:
As far as the firmware is concerned, for monoband operation you could use the latest Raduino sketch v1.28.1. |
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Re: uBITX Firmware CEC Version 1.1 Release
#ubitx
I downloaded V1.1 and XLOADED the 16P version it to my uBITX V3. ?All I have now is a top line of boxes on my standard isssue display and XLOADER will no longer work in order to re-install V1.061. ?Any suggestions?
Tom |
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Re: K5BCQ uBITX Relay Switched LPF/BPF board
Hi Kees at what price for France? 73 QRO Gilles F1BFU / FR 2018-09-13 20:49 GMT+02:00 Kees T <windy10605@...>: Yes, on the 6x LPF stuff. Hope it's a more restrained than the AGC/Click mini-kit ordering. --
Gilles - F1BFU/FR |
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Re: uBITX Firmware CEC Version 1.1 Release
#ubitx
¿ªÔÆÌåÓýHi, Ian, ? Thanks for quick answer, Ok we can use code with no mods and just adapt graphical objects or as you say find good HMI files 73¡¯s de Jacques ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Ian Lee ? f1apy ? Your work is all normal.?I only created GUIs for 2.4 "and 2.8". All 3.2 "and above LCD files are for testing. It's just conversion from 2.4",?But you will find the .hmi or .tft files that the great developers have converted. ? Ian, KD8CEC ? 2018? 9? 13? (?) ?? 5:29, f1apy - Jacques <f1apy@...>?? ??:
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Re: uBitx Antenna
#ubitx-help
Hi,
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I have posted elsewhere about our use of ~50 ohms and 'tuners' at the transmitter to show the radio said ~50 ohms. Besides the feedline loss, which may or may not be tolerable, modern radios have broadband finals with fixed (not tunable) output filters. Those filters are designed for somewhere around about 50 ohms. If we show them something dramatically different their performance diminishes by some unspecified amount. It's good to show the radio 50 ohms resistive. Do the best we can with the rest of the system :) If we place the tuner AT the antenna and use it to match whatever the antenna happens to be (maybe 275R -j6 or 2500R -80j) then our radio AND our coax "see" 50 ohms. Maybe a practical limit for SWR variation (at the radio) is 1.5 or 2. I have sometimes operated solid state finals into as much as 3 to 1 SWR without apparent negative consequences. But not very many times:) L-networks do a fabulous job. The unseen consequences may have been some extra nasties radiated. In the old days we had Pi and Pi-L output networks to tune our tube transmitters. Newbies are probably unfamiliar. Those could match quite a lot of 'crap' beyond the antenna connector on the back. I wonder how often we operated with reduced filtering effectiveness using those - mistuned. 73, Bill KU8H On 09/13/2018 01:16 PM, Warren Allgyer wrote:
Lawrence, --
bark less - wag more |
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Re: uBitx Antenna
#ubitx-help
Warren Allgyer
Lawrence,
Your advice is spot on. One clarification.... and it can be important. 68 ft for 1.0 dB loss at 28 MHz is absolutely correct....... IF, the antenna is a perfect 1:1 match. At 2:1 VSWR you only get 51 ft per dB and at 3:1 VSWR it drops to 42 feet. That is why it is false economy to use a tuner on the rig end of a coax fed antenna. WA8TOD |
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Re: uBitx Antenna
#ubitx-help
¿ªÔÆÌåÓýRyan ? Your web site isn¡¯t responding ? art ? From: [email protected] [mailto:[email protected]] On Behalf Of Ryan Flowers ? If you put an L-Match tuner on that random wire, you'll have something you can transmit with :-)? |
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Re: uBITX Firmware CEC Version 1.1 Release
#ubitx
f1apy Your work is all normal.?I only created GUIs for 2.4 "and 2.8". All 3.2 "and above LCD files are for testing. It's just conversion from 2.4",?But you will find the .hmi or .tft files that the great developers have converted. Ian, KD8CEC 2018? 9? 13? (?) ?? 5:29, f1apy - Jacques <f1apy@...>?? ??:
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Re: uBITX Firmware CEC Version 1.1 Release
#ubitx
Nick Implemented but not yet tested.? If new features are added back, they will not be enabled for this version because the beta period should be longer. However, you will find the Custom LPF option in ubitx.h. I will post about that soon. Thank you for your interest. Ian 2018? 9? 13? (?) ?? 9:29, Nick VK4PP <nickpullen@...>?? ??: Ian, |
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Re: uBITX Firmware CEC Version 1.1 Release
#ubitx
Kevin, Bo, Tom I am always thankful for you to test it. Ian 2018? 9? 12? (?) ?? 10:08, Kevin Rea <reakevinscott@...>?? ??: Thank you very much Ian for all of your hard work on this. |
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Re: uBitx Antenna
#ubitx-help
If you put an L-Match tuner on that random wire, you'll have something you can transmit with :-)?
http://miscdotgeek.com/bitx40-l-match-tuner-for-end-fed-antenna/ -- Ryan Flowers - W7RLF |
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Re: uBitx Antenna
#ubitx-help
Coax loss can be low if the antenna shows little swr. Loss increase a lot when you combine the SWR with the loss of the cable. Low loss line like the balanced line make negligible the losses of an antenna with higher SWR. Ok you may reword a little better than I. Il 12/set/2018 21:47, "Dr. Flywheel" <Dr.Flywheel@...> ha scritto:
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Re: si5351 crosstalk
#radiuno
Glen,
Great job looking into this alternative. I'm anxious to see the results. 73 Kees K5BCQ |
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David Posthuma