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Re: TNT Shipping
jjpurdum
No, it doesn't need more money. I needs to be more efficient with the money it has. Jack, W8TEE
On Monday, May 24, 2021, 4:29:54 PM EDT, Ed Pflueger <ab4iq@...> wrote:
My May 5th showed left England and is now at a USPS place in Chicago, IL as of May 17, 2021. Looks Like the USPS needs more money to get the job done.
Ed.. AB4IQ
From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of Lionel B
My QLG2 might be on a world tour. No one knows.
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Re: TNT Shipping
Ed Pflueger
My May 5th showed left England and is now at a USPS place in Chicago, IL as of May 17, 2021. Looks Like the USPS needs more money to get the job done.
Ed.. AB4IQ
From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of Lionel B
My QLG2 might be on a world tour. No one knows.
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Re: Antenna Tuner
William Jenrick
Tnx again to all of you about your thoughts abt ant. tuners, long wires, house gutters, stringing up an ant @3 am to avoid the Gestapo HOA etc, etc. I am sorry that apparently I opened Pandora's box on the subject and flooded our group site. Antennas have always been a fascination for me ever since I was 15 yrs old back in 1960 and got my first ham license and little money to spend on rigs. You can have a Ferrari transceiver but a Volkswagen for an antenna and be po'd about speeding so much money for such little results (DX). On the other hand. If you have a 5 watt, (QRP LABS of course, transceiver) and a Ferrari ant, the world comes alive. Of course all of you Hams out there knew this already. And I am also not saying a QRP rig is a Volkswagen. Quite the contrary so don't come back and cuss me out, OK? will
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TNT Shipping
Lionel B
My QLG2 might be on a world tour. No one knows.
On May 20 my order update gave me the link to TNT and when entered my customer reference it showed delivery on May 24 to the correct address. It was collected on May 20. Excellent! Today's May 24, so I checked back with TNT. According to TNT my shipment number 17792xxxx is no longer available. Further, tracking shows this 17792xxxx shipping number in transit and going to Easy Bethel, United States for delivery on May 26 before 1800h. It also shows "collecting" May 24, 2021 in Gaziemir, Turkey. And then "collected" May 24 at 1758h. Also, it should be delivered to Wyoming, MN not East Bethel, MN. Badly out of sync. I was thinking that East Bethel, MN might be a FedEx hub, or distribution center, but I can find no info online and without a FedEx tracking number there is no help. A text as normal, from FedEx on a delivery.has not been received. Perhaps it will show up though there is a disconnect between TNT and FedEx or whomever is the final shipper to handle the package that makes tracking impossible. This is really odd with several pieces of conflicting information. Has anyone else seen this sort of thing on TNT tracking?
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Re: Antenna Tuner
Hi, Jakob Sorry, a true half wave is a special case, with a narrow impedance peak at around 2000 ohms. Either side of the peak the impedance is much lower and adds a bunch of "j" to the party. 73 Jim W4JED
On 5/24/21 12:12 PM, Johan Bodin wrote:
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Talk: The Magic Band by Don Field G3XTT - Tues 25th May 2021, 1900 UTC (3pm EDT)
Talk: The Magic Band by Don Field G3XTTDon Field G3XTT will take us through the fascinating properties of the 6m Band which results in people calling it “The Magic Band“. The propagation properties of this band, as it is nestled between the HF bands and the VHF bands, give remarkable and often unexpected results. These propagation properties attract enthusiasts who seek out these often unpredictable properties but with incredible results.
Don has also written the book, “The Magic Bands” which covers 6m and 4m. The book is available from the RSGB, Practical Wireless and Amazon.
Don Field G3XTT is a well-known person in amateur radio, having been on the board of the RSGB, carried out DXpeditions, and is the editor of Practical Wireless.
We hope you can join us.
Tuesday 25th May 2021, 1900 UTC (3PM EDT)
This event is hosted on Zoom: https://zoom.us/j/7730730073 (Meeting ID: 773 073 0073 - no passcode)
Also, live-streaming on YouTube https://tinyurl.com/buryradio (Bury Radio Society with Warrington Amateur Radio Club) Trystan G0KAY
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Re: Voltage Regulator - QCX Mini
Alan G4ZFQ
I don't know why all of my photos were removed,Dan, Maybe because the group is using all it's storage? Using 128 MB for attachments storage Using 624 MB for photos storage And some Files.. 73 Alan G4ZFQ
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Re: Wide Filter as opposed to 200Hz - without changing anything else (CF, offset, sensitivity), can I do it?
One problem with removing the bandpass filter in the QCX is that you align the phasing network for maximum suppression of the opposite sideband in the center of the filter's passband. Opposite sideband suppression will be lower outside that passband, so you won't get the same level of single signal reception that you get with a standard QCX. Unlike a filter design, opposite sideband suppression in a phasing receiver doesn't depend on distance from the suppressed carrier frequency; it's all about accuracy of the amplitude and phase relationships of the I and Q signals.
On 2021-05-24 08:28, VK5EEE wrote:
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Re: Antenna Tuner
jakob@...
Thanks, Allison. You give me hope! Jakob
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Re: Antenna Tuner
ajparent1/KB1GMX <kb1gmx@...>
I used one of those kits and the toroid was fine. The wire supplied was
about #24 and easily soldered. The antenna SWR indicator is only for tuning and must be switched out of you incur a large loss. However with that said I got mine from amazon for 13$ and had low expectations. I suspect some are not all that. The variable caps in the picture posted did not look like the supplied poly varicons in mine. My meter was smaller 16mm square and put in the case . Works well for 80 though 10 as built. Allison ------------------------------- Please reply on list so we can share. No private email, it goes to a bit bucket due to address harvesting
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Re: Wide Filter as opposed to 200Hz - without changing anything else (CF, offset, sensitivity), can I do it?
ajparent1/KB1GMX <kb1gmx@...>
Spread sheet made from the one used for the base QCX filter...
Its on .ODS format Excel should digest that and its the nominal format for Openoffice/LibreOffice Calc. The left side is for those that want 200hz and just move it around for say 600 or 800 hz center frequency. The right side you enter the HP and LP frequencies you want and read the resistor values. Not pretty but I did it years ago as a hack for the QCX-SSB thingie. Allison ------------------------------- Please reply on list so we can share. No private email, it goes to a bit bucket due to address harvesting
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Re: Wide Filter as opposed to 200Hz - without changing anything else (CF, offset, sensitivity), can I do it?
That's a huge help and very kind of you Allison.
toggle quoted messageShow quoted text
I also just saw in the manual it meantions the gain. 5.7 CW filter The CW filter used in this receiver has a 200Hz bandwidth. The circuit is based on the HI-PER- MITE CW filter kit design by David Cripe NM0S, available from the Four State QRP group: http://www.4sqrp.com/HiPerMite.php (thanks David for permission to use it here). This is a high performance circuit specifically designed to avoid objectionable ringing. There are three stages of low-pass filtering and one stage of high-pass filtering. The first three stages retain the 2.5V “midrail” bias all the way through from the input transformer T1. The final stage IC9A is biased using the 5V supply (avoiding a few extra components to create a real 6V midrail at half the supply). Sidetone is generated by the microcontroller and is a squarewave. To make it sound nice and clean, the sidetone injection is done at the input to the 200Hz CW filter, which cuts off any of the squarewave harmonics leaving a clean 700Hz sidetone. The CW filter also provides a measured 18dB of gain. Thank you for your very elegant solution, 77 ES 88 DE LOU
--
Love 30m and CW? http://www.30cw.net
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Re: Antenna Tuner
Pat
On Mon, May 24, 2021 at 11:31 AM, Pat wrote:
(for less than 10w),I meant my rigs don't normally exceed 10W. The three-core EFHW can apparently handle thousands of watts without saturation.
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Re: Antenna Tuner
Pat
Tuned is the way to go if you can have a designated, single-band antenna running to your operating position. I would think that's often not often the case with a portable, QRP radio. I would certainly package the 40m Mini with its own tuned antenna in a baggie or something for POTA, etc.
I can understand having to use a mult-band antenna with multiple rigs, though. I too have a T1, and both the KX3 and KX1 have internal tuners. But, I rarely use them since buying a commercial EFHW and building an EFHW long wire of my own. I don't have an HOA to contend with, so I have plenty of room to string them up. I used Steve Ellington's excellent information available through youtube for the 80m-6m version (~134'). While way over engineered using three ft 240-52 cores (optional) and 12g magnet wire and radiator (for less than 10w), I have seen excellent results compared to the commercial version I have, an original MyAntennas EFHW using a single core and 18g wire (which I ended up replacing with 14g). In Steve's video, he gives info for a lower-power version using a single core and the dimensions for a 40m version if you don't have enough eaves space to hide the 80m version wire. I've built and used end fed random length antennas, but matching them always seemed really lossy. I know there are coupling losses using a multi-band EFHW, but my tests have shown that a tuner isn't necessary on most bands (I think 17m was a bit high, like 3:1 if I recall) using the long wire. My first QCX contact using the EFHW I built was to Green Bay, WI, broadside, as expected, and north and east of my location near Kansas City. My next QCX contact, not-so-coincidentally a QCX-to-QCX contact, was almost due north of me to the Canadian border (nearly 700 miles), a quite uncharacteristic direction for the EFHW, which seems to work better with broadside contacts. I know William's original post was about tuners, and there are some good, inexpensive tuners out there, like the QRPKits SOTA tuner, with the cool, metal case, but if you are going to use a matcher, it may be worth another late-night, clandestine, antenna-hanging opportunity to hang an EFHW, although I am not sure of the effects of the gutter, and house on propagation. I will say that I have an Alaskan contact from a ham that was using an EFHW and his zig-zagged pretty good around his property at about 8' to 10' high. I have another EFHW contact with the radiator running along the top of his fence at about 6'. As usual, physics and antenna theory can help you model your design and demonstrate expected propagation characteristics, but practical use and results often vary from the models.
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Re: Wide Filter as opposed to 200Hz - without changing anything else (CF, offset, sensitivity), can I do it?
Thanks Alan, I'll look into this, I did read about being able to by pass it completely. I'll see what that sounds like with no filter!
toggle quoted messageShow quoted text
The gain was mentioned by Hans in an old thread I found on the subject: QCX Tuning Range + SSB Reception? also here: QCX SSB voice reception… and here: QCX SSB voice reception… QUOTE The 200Hz filter is quite sharp (see the measurements in the back of the manual). You would need to bypass it. The receiver has quite a lot of available gain so the loss of 18dB may not worry you too much. But you might want to consider building a separate LPF with say 3kHz cut-off and a gain stage, and making them switchable. UNQUOTE The proof of the pudding is in the eating and you've not noticed any problem, so I'll give it a try. 77 de Lou
-- Love 30m and CW? http://www.30cw.net
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Re: Wide Filter as opposed to 200Hz - without changing anything else (CF, offset, sensitivity), can I do it?
ajparent1/KB1GMX <kb1gmx@...>
The Filter in the QCX is of the low pass and high pass format using opamsp.
The band width is governed by the edges of the high pass (cutoff requency) and the high pass cutoff frequency. The resulting bandwidth can be anything ones wishes are. For a stock 200hz to move the center around the spreadsheet does that for you. IT has an assumption of 200hz bandwidth. To change bandwidth it still can do that but the human has to use some wetware. you can use the spread sheet to alter either the high pass or low pass section by only altering the components associated with them. The capacitors and resistors associated with IC8B, IC8A, and IC9B form the low pass filter. The nominal cutoff for that is around 800hz. In plain english anything over 900 hz is attenuated and anything below gets though with some gain. The high pass if formed by the caps and resistors around IC9A. The nominal cutoff for that is about 600hz, anything above that gets through and below gets attenuated. So to widen bandwith low pass has to be lower say 300hz... So C2, C19 need to be about three times the value (put two more of the same value across the existing ones). That should be adequate to avoid changing resistors. For the low pass sections all of the resistors need to decrease by a factor of about 3 to get to about 2700hz.... So R28, R29 become 11K. R30,R31 become 15.6K (15k will do) R32, R33 become 12K (11k will be adequate if 12K is not available). There I've done the work for you. The spreadsheet can help you calculate that IF you also want to chance caps and realize that if you move the center frequency down to 400hz the low pass side will be 300hz [use the cap and resistor values called out for C19,c20 as well as R35]. Repeat that only with center frequency of 2600hz and use the values called out for all the non low pass parts. The easy way is to make a filter and add a double pole double throw switch to switch between them... one would have to understand the board layout and make cuts and add wires to do that. You can get http://www.4sqrp.com/kitIndex.php, Thats a version of the hipermite filter for SSB. Pick up the audio at junction of R27 pin-2 (wiper) and R29 [before the CW filter built in}. Allison ------------------------------- Please reply on list so we can share. No private email, it goes to a bit bucket due to address harvesting
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Re: Wide Filter as opposed to 200Hz - without changing anything else (CF, offset, sensitivity), can I do it?
Alan G4ZFQ
3) Finally if anyone more gifted at this has managed to make a switch to e.g. another board to switch the filter between 200Hz and whatever I choose per above, what does the circuit look like, to make such a modification? As admittedly it's nice to be able to sometimes shut out strong QRM!Hello? I do not think the filter has any gain. I use a QCX for SSB reception by simply bypassing the filter stage with a switch. I think al I did was to switch the filter side of C20 between the filter and R27 slider. 73 Alan G4ZFQ
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Re: Antenna Tuner
Johan Bodin
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Re: Voltage Regulator - QCX Mini
Michael Greene
I followed Dan's photos a while back to change to the 78M05. It worked perfectly. I did have to change out a bad IC9 as well.
Now, my 20m mini runs like a champ.
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Alan G4ZFQ
hear the rotary encoder in the audio channel when tuning the VFO. Is that a known issue? How could it be solved?Sebastian, This has been discussed, maybe a message search will help. As far as I remember it is partly due to microphonic SM capacitors. 73 Alan G4ZFQ
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