Re: uBITx.net website
Mike :
This is an awesome idea ! Right away I can see that over time, this could really help to reduce group traffic from "uBITX newbies" looking for solutions to problems that have already been resolved. Can I suggest that where possible, sections on the website provide a link to the associated discussions in the Bitx20 Group? As Groups.IO allows a search based on message number, just including the number of the initial message for a given topic would allow website readers to go back to the Bitx20 group and read through the complete discussion on that topic if they want the full story. Many thanks for doing this ! Cheers Michael VE3WMB
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Re: Second batch of uBITX shipping?
#ubitx
Joe Puma
I ordered mine on Jan 17th. I was just emailed and was told 2-3 weeks for shipping. :(
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Sent from my iPhone
On Jan 27, 2018, at 8:33 AM, chris gress <Chrisg0wfh@...> wrote:
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Re: IRF510 amplifier failures
philip yates
So if they are " real RF transistors" probably worth the extra then ? Phil - G7BZD
On Sat, Jan 27, 2018 at 1:36 PM, K9HZ <bill@...> wrote:
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Re: Second batch of uBITX shipping?
#ubitx
bill richardson
Got my shipping notice this morning. Looks like it shipped out on Thursday and will arrive on Monday. I ordered on 15 December.
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Sent from my iPhone
On Jan 27, 2018, at 7:53 AM, Arvo KD9HLC via Groups.Io <arvopl@...> wrote:
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Re: Second batch of uBITX shipping?
#ubitx
Dgyuro <dgyuro@...>
Dec 17 order date will ship in 2 days.
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Sent from my iPhone
On Jan 27, 2018, at 6:33 AM, chris gress <Chrisg0wfh@...> wrote:
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Re: IRF510 amplifier failures
K9HZ <bill@...>
I don’t think it’s so much a matter of if they will work or not. Both will work fine at 50 MHz (and above actually)… the issue is that the RD15HVF1 is a little flatter across the spectrum and from that perspective easier to design around and match. I use them all the time and they are very easy parts to make work. A pair will easily put out 30 watts 1-54 MHz if the rest of the design is correct.
I’ve been thinking about and have had requests for a nice linear amplifier for the uBITx and these parts are cheap enough to use for that purpose too. I originally designed one using two RD70HVF1 parts but the cheapest I’ve found them is $18 each. Not a show stopper but the little brothers are cheaper. If The parts were under $15 in large quantity, it would be a no brainer. The auto tuner must be finished first though. Oh, did I mention, the RD series devices are real RF transistors?
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois
Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com
email: bill@...
From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Lawrence Galea
Good morning. I was thinking about the RD15HVF1 so that it would be easier for people who want to try 50MHz and perhaps 70MHs where available with suitable mods to the μbitx.
The RD16HHF1 appears to be used in the Ukraine transverters as a PA in the 50MHz, 70MHz and 144 MHz transverters while the RD15HBF1 appears to be used in the 222MHz and 432MHz transverters. http://transverters-store.com/50mhz.htm I have the 50MHz and 70MHz transverters and they do work. Last year I built a 5 element LFA Yagi for 70MHz but didn't have time to get on the air. Lots of data at http://www.g0ksc.co.uk/intro-lfa.html Regards Lawrence
On Sat, Jan 27, 2018 at 3:41 AM, James Lawrie <lawriejk@...> wrote:
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Re: Second batch of uBITX shipping?
#ubitx
chris gress <Chrisg0wfh@...>
Mine is via India post I don't use dhl the take the pee with the extra charges had to pay £24 last time chris
On 27 Jan 2018 13:22, "Laurence Oberman" <oberman.l@...> wrote:
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Re: Second batch of uBITX shipping?
#ubitx
Laurence Oberman
If you paid with PayPal, PayPal will notify you when it ships. Always better to pay the DHL extra as it's fully tracked.
On Jan 27, 2018 7:53 AM, "Arvo KD9HLC via Groups.Io" <arvopl=yahoo.com@groups.io> wrote: Got a shipping confirmation last night for my December 15 order. Better start working on the case!
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ubitx - pads under toroids
MAc B
There are nice 6 hole plastic pads under toroidal transformers. Are they from the shop or custom made?
MAc
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Re: Second batch of uBITX shipping?
#ubitx
Got a shipping confirmation last night for my December 15 order. Better start working on the case!
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Re: Caveat Emptor!
On Fri, Jan 26, 2018 at 11:47 am, John P wrote:
I just received 3 of the MCUFriend 3.5" TFT displays purchased from "accecity2006" on eBay. One of the 3 worked correctly; one was cracked and another one was not displaying text correctly.I did get a refund quickly from the seller. That won't get my project up and running any faster though! Anyone have any recommendations on a reliable provider of the MCUFriend 3.5:" TFTs? -- John - WA2FZW
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Re: End whistling into the mic
chris gress <Chrisg0wfh@...>
Built on back of a switch low power atu to the right chris
On 27 Jan 2018 11:45, "chris gress" <Chrisg0wfh@...> wrote:
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Re: End whistling into the mic
chris gress <Chrisg0wfh@...>
You could always use this so you could have built in swr/rf out on your bitx the 51ohm resistors I use 2x 100 ohm 3watt I picked this up from the internet
On 27 Jan 2018 09:32, "gw4akz via Groups.Io" <gw4akz=aol.com@groups.io> wrote: On Thu, Jan 25, 2018 at 01:20 pm, David wrote:
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uBITX Firmware (CEC) 0.30 released (Test version).
#ubitx
Ian Lee
I have not posted it on my blog separately since it is a test version. When the test is complete, write a usage and post it.
I am writing for someone who is interested and test. If I get an error report or a fix, I'll fix it and make it into github's 0.31 branch. Here is a brief description of the change from 0.30. improved CW Keying, Frequency Tune and CW performance according to users' requirements. In particular, CW Keying applied ron's logic for use with original hardware. also made it possible to set the CW Key ADC range to reduce errors in CW. ADC monitoring function is added to know the exact resistance and key contact status. I thought that if you set your own ADC range using the measured values here, you would get an error. I need to test these things, so I leave this post.
removed all existing sources related to frequency tune. And i applied threshold, weight about speed, and steps. The problem of changing the frequency at the moment of catching the knob has probably disappeared. when the threshold has been exceeded, start frequency changing, i added some logic to prevent the thresholds from becoming unnatural. If you want to fine-tune, slowly turn it and the threshold will be applied continuously and change very slowly. The tune steps you can select now are 10, 20, 50, 100, 200, but you can change them in uBITX Manager 0.31 (now working) You can change the step by pressing the function key for a long time. If you keep pressing it, Diallock will work.
The ham band movement applied at 0.28 was set to 0.30, so that region1 was set as the default.
Of course, you can change to the previous operation state by pressing the function key in the band select menu for a long time.
And like the 0.28 version, you can set up to 10 frequency bands in uBITX Manager to suit your country or your liking. Please refer to below for the improvements and how to upload firmware and more detail. The source and compiled firmware can be found in the release below link.
-- https://github.com/phdlee/ubitx How to upload firmware and use version up to version 0.27 http://www.hamskey.com Best 73 KD8CEC / Ph.D ian lee kd8cec@... www.hamskey.com (my blog)
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Re: No TX
#ubitx
David Beal
Hi Joe,
I'm experiencing similar symptoms as captured here: https://groups.io/g/BITX20/topic/7878333?p=Created,,,20,1,40,0 Current draw indicates that it's making power, but nothing is making it to the antenna. FWIW, my initial bias current was 380 mA. I validated with a separate receiver that the radio is transmitting. I had concluded that K3 was bad; replaced it tonight (it did measure with open coils), but still no output. Tomorrow, I'll follow Ashhar's suggestions in this thread to check around the toroids and I'll run some DC checks on the relay paths. -- Dave Beal AE6RQ
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Re: uBITX woes, feeling disheartened.
#ubitx
David Beal
also, for what it's worth - the original relay data sheet is here: http://www.megasan.com/service/pdfhandler.ashx?fileid=6579
-- Dave Beal AE6RQ
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Re: uBITX woes, feeling disheartened.
#ubitx
David Beal
Good evening,
After I removed K3, I found that it had an open on the coil, but still with the new K3 still no joy. I'll follow Chris Herd's suggestion below as well as review the other threads here on a quest for hints. Thank you for your help. -- Dave Beal AE6RQ
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Re: End whistling into the mic
gw4akz@...
On Thu, Jan 25, 2018 at 01:20 pm, David wrote:
Instead of whistling into the mic when using an antenna tuner on SSB, we could easily add a tone generator and switch to do that for us. Thoughts?I have fitted a switchable -6db pad between the output of the pcb and the anttena socket. With the circuit switched in the worst case swr is about 1.65 to 1 with an open or short circuit, this prevents the finals from ever seeing a poor swr. tune is easily achived with the key down and reduced radiated power when tunning up. I use 2 watt carbon resistors 33 ohms in a t attenuator circuit. 2 in parrarlel to give 16.5 ohms which is close enough to the callculated value. I use a relay to switch this attenuator in and out.
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Re: IRF510 amplifier failures
Henning Weddig
Yoiu can get this kit also on ebay, a short researcht fgave a big variety in price from about 5 euros including shipping up to 30 Euros! So be carefull!!! Henning Weddig DK5LV Am 26.01.2018 um 19:21 schrieb Thomas
Sharka via Groups.Io:
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Re: uBITx.net website
Lawrence Galea
Thanks. An excellent idea Had a look. Regards Lawrence
On Fri, Jan 26, 2018 at 10:38 PM, Mike Woods <mhwoods@...> wrote:
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