Re: uBITX Firmware CEC Version 1.1 Release
#ubitx
Ian, Thanks you so much, the custom filter section is PERFECT for my LPF boards. and very easy to setup!!! Please send me an email with your details, I will post you a set of these LPF boards!!!  73 Nick VK4PP
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Re: uBITX Firmware CEC Version 1.1 Release
#ubitx
This is great. And it looks like the source code is now there.?
I find it easer to upload new firmware from the source rather than the hex files, so I'm still (happily) using the last version that had source code.?
Also, with the source code, I'll be looking to see how Ian has yet again pushed more functionally into such a tight space.
Tom, wb6b
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Re: K5BCQ uBITX Relay Switched LPF/BPF board
John, since you asked.............
The 4x LPF Relay Filter board with plug-in LPFs (pictures further down on this thread) will fit in the same location as the existing 4 LPFs and the 4 associated relays after removing them. The overall enclosure requirements will not be any different. The idea is to reuse the uBITX components on 4 plug-in LPF filters. The 4x board is undergoing testing now.
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and/or...........
The other option I have is to use an external 6x LPF Relay Filter board (applicable to many QRP rigs) and mount that externally or internally if you have a large enclosure. The 6x board is "dirt simple" and basically has an input bus and an output bus which support 6 plug-in LPFs. Those individual LPFs can be the ones Hans Summers sells at QRP Labs or your own designed/built LPF plug-ins. Hans Summers also sells a nice, 6 relay, LPF plug-in board.
My 6x board layout will allow you to cut part off and make it a 2x, 3x, 4x, 5x, or a 6x plug-in LPF board. Control for the 6 sets of relays (2 per LPF) is with a manual 6 position rotary switch. Pictures/Gerbers are in the uBITX files section under my call.?
I will make the 6x Gerber files available today so you can order your own and share with others or sell you a "board in an envelope" with postage included for $5.00 total in the USA until I'm out of stock. I am also offering a mini-kit with a board, 4-12 relays with 1N4148 axial lead diodes and smt capacitors for $1 per relay (those relays are the same ones used on the uBITX board today), 6 blank LPF boards with associated headers (no components), and a 6 position rotary switch. No coax connectors are provided and the board has SMA footprints. Since that won't fit in a regular envelope,? postage is $4 in the USA for a padded envelope until I'm out of stock. The mini-kit as described with 12 relays and 6 blank LPF boards is $30 plus postage.
With the many LPF alternatives out there I have no idea how this is going to work out and I hope you are not too confused. .......I am.
73 Kees K5BCQ
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Re: K5BCQ uBITX Relay Switched LPF/BPF board
Hi John,
I will let Kees answer for himself. I have a homemade steel box and my uBitX barely fits - like yours. It is a lot smaller that the few others I have seen. But..I suspect that I can find a space for a new filter card over there AND find a way to get it assembled. I have a board coming and will probably order another of a different style.
73,
Bill KU8H
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On 09/12/2018 06:43 PM, John Scherer wrote: Hello Kees,
Will your proposed mods here change the case requirements for the
uBitX. I have a Hammond 1402DV
<>
case I was planning on using. Its a great case for portability and the
stock uBitx fits - just ;-).
-John
--
bark less - wag more
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On Thu, Sep 13, 2018 at 08:52 AM, Ripley wrote:
how would you like to be compensated, PayPal.
Yes, I have an order form on my blog. I will add the boards to it and let everyone know... 73
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Kees,
With what HFsignals used it would left to the transformer symmetry.
The testing was part of the what int he world is going on after spurs were spotted.
Allison
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Allison,
If the old reliable standby SBL-1 mixers didn't make any difference (thanks for testing), I would guess the HSMS-282R would not do any better, ......although I've had luck with the HP "die matched" pairs/quads before.
73 Kees K5BCQ
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Hello Nick,
When the boards are received and you are ready to take orders how would you like to be compensated, PayPal.
Thank you? Ripley KD8UYQ The words are mine but this iPad does what it will with them.
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On Sep 12, 2018, at 6:17 PM, Nick VK4PP < nickpullen@...> wrote: On Wed, Sep 12, 2018 at 11:39 PM, Michael wrote:
Would also like to order 4 of the filter boards. Let me know how
HI Everyone, Boards should be around 2 weeks, i took the cheap option for shipping... 73 Nick
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Re: K5BCQ uBITX Relay Switched LPF/BPF board
Hello Kees,
Will your proposed mods here change the case requirements for the uBitX.? I have a? case?I was planning on using.? Its a great case for portability and the stock uBitx?fits - just ;-).
-John
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Re: uBITX Firmware CEC Version 1.1 Release
#ubitx
Your accomplishments are massive when viewed in one big list.
Basically you have changed our little Chevy into a nice big Caddy! ?
My little ubitx is making contacts with my mag loop INDOORS!
Take a break before you start into more mods.
73, Bo W4GHV?
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As far as the firmware is concerned, for monoband operation you could use the latest Raduino sketch v1.28.1.
This includes the latest enhancements such as spurious prevention, CW keyer, capacitive touch keyer, improved calibration, etc.
To modify it for 80m, just change the defines for MIN_FREQ and MAX_FREQ at lines 36 and 37.
And set Region to 0 at line 47.
73 Allard PE1NWL
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How about replacing the 2N3904 in the Bi-di amp with BFR106? as with Q60 pre-driver?
Would that help in making them more linear?
73 Nick VK4PP
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On Wed, Sep 12, 2018 at 11:39 PM, Michael wrote:
Would also like to order 4 of the filter boards. Let me know how
HI Everyone, Boards should be around 2 weeks, i took the cheap option for shipping... 73 Nick
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I just checked?? ?
covers 80 40 20 15 10? so in fact the code is already there and supposedly tested and contains all the ALLARD Brillig enhancements too.. which is a bonus. CW etc etc.
but? how you do the band switch in ferrite and copper? is up to you - nb a couple of LPF boards are in? the works.? Because the Raduino is already packed,? a rotary switch for band select is the/a? sensible and crude option.? It makes sense to try to retain 40 as well as 80mtrs in? a switchable form.
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Kees,
The mixers are already using monolithic diode pairs.? Going to diode quads might help balance
but I can say replacing the mixers with packaged Tuf-1 or SBL-1 made not one bit of difference.
However having an amp that by 20M can barely apply 150mw(clean) to the finals and is
struggling to do that because its prior stages are also gain impaired has a lot to do with that.
So then people people harder to get the 10W they "paid for" which is mostly IMD and splatter.
Allison
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It would be better to put all of this on the main board as close to its landed destination as possible.? Just send the I2C to the main board. ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Kees T
Sent: Wednesday, September 12, 2018 9:52 AM
To: [email protected]
Subject: Re: [BITX20] si5351 crosstalk #radiuno ? Jerry,
Would you suggest mounting those three 74LVC1G04GW parts on the Raduino board, close to the Si5351? ?
73 Kees K5BCQ -- ¡_. _._
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Since homebuilt diode DBMs are quite "touchy" what about using a better matched diode ring quad mixer like the HSMS-282R.?
Maybe this should be in the "spurs" thread
73 Kees K5BCQ
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Does he have a true 3.5 version available for download? I notice the link has the tft only. Is the hmi available?
--
N5KBP
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100% agreed.
--Ron? ? n7FTZ
On Wed, Sep 12, 2018 at 10:13 AM Lawrence Macionski via Groups.Io <am_fm_radio= [email protected]> wrote: Daniel-
I've been studying and building antenna's for 52 years.. Here's some things I've concluded:
With regard to uBITX (under 300 watts) operation:
#1. The guy that tells you, you need a balun for a dipole, Usually is the guy that is selling them. They can be made for $5 or less. Markup is huge.
#2. You need no better than RG-8X coax... Unless:
?????? A. Your coax run is over 75 feet? and used to 148Mhz. (27ft per dB loss -under 3dB which is 1/2 power) negligible loss.
?????? B. Your coax run is? 150 feet or less? under 30Mhz. (63ft per dB @28.4Mhz- under 3dB or less on lower bands) negligible loss.
?????? C. You are not running over 650 watts (approximate)
#3. There is no "secret sauce" when? buying a manufactured antenna.
?????? A. One manufacture makes antenna's in colors and that is their #1 selling point.
?????? B. Virtually none come assembled, so you have to put them together anyhow and tune them.
?????? C. Markup on materials is 4-10x, so you get a "kit of parts" they put together for you. (and pay for the "secret Sauce"
#4. If you can't afford Antenna books, your local public library will get you any Antenna Book with an Library of Congress number.
????? A. My antenna books stacked on the floor are Knee high.. 20+ years ago I paid $52 for John Krause's Antenna Theory.
????? B. Authors such as Lew McCoy, John Krause, R.L Cibek, Joe Carr, anything sold by ARRL are authoritative. This is a start, there are others.
#5. Regarding coax in #1... Reference QST October 2017 page 72.
#6. Remember? 3dB loss can be measured with instruments but never detected by ear.
#7. An antenna constructed with sound engineering plans will get you on the air.? Having the test equipment/ tuners is optional (OCD frankly)
#8. Watch them bash my sound advice.. Yet some will also agree with me.
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Gordon,
1. ?Fixed external filters, changed manually (no software change)
2. ?Replace the right-hand side of the relays with a daughter board as I did. (no software change in the way I implemented it)
3. ?Replace all the relays & filters ?with an external daughter board (May or may not require software change). Hey or may not use the existing components, might use all new components
4. ?There was even a commercially available multiple relay system that could be pressed into service.?
5!
Rip up the relays.? Remove all the traces under them. Install the relays from the underside of the board
and rewire with short direct wires to revised hook up.? Sounds nasty but I've tested and it fixes the problem.
It was the spaghetti wiring you do not see under the relays doing bad things.? ?This is not the full procedure
and details but a solid outline.? The relays get wired up so only one is in use at a time and the DC feed
under them gets rerouted as wires but there are a few hidden fixes to other things that comes from that.
Allison
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Nick VK4PP
Ripley
John Scherer
Allard PE1NWL
MadRadioModder