Let me know how it works out, please?
|
None of my regular sources have anything close.? Finding a pull will be a needle in a haystack.? Not sure it's build able - as a practical exercise.
|
Re: Upgrade to Pi48GB Raspberry Pi
I have a nice Kenwood 120 watt linear amp.
73 en mooiloop,
73 and kind regards,
Marius Lubbe - ZS1ML
Chairman: Boland Amateur Radio Klub
We serve a wide area including the Cape Winelands and Cape Town areas, of South Africa.
Mobile phone: +27 (0)82 785 7763
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Gerald Sherman Sent: Thursday, 15 August 2024 11:33 To: [email protected]Subject: Re: [BITX20] Upgrade to Pi48GB Raspberry Pi I would advise keeping the 7300. It's nice to have 100 watts sometimes. Gerry On 2024-08-15 06:36, Marius ZS1ML wrote: Sorry about the wrong word, its my mothertonque spelchecker doing it and I am not noticing.
BTW toeps=apps
I am considering letting my IC7300 go in favor of the SbitX V3. Any thoughts?
73 en mooiloop,
73 and kind regards,
Marius Lubbe - ZS1ML
Chairman: Boland Amateur Radio Klub
.
bark.org.za%2F&data=05%7C02%7C%7Cccfb2fddeff849562cd808dcbd0d38ab%7C84
df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638593111687040379%7CUnknown%
7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJX
VCI6Mn0%3D%7C0%7C%7C%7C&sdata=F%2FzZBYymYLWcHA1KPsfL0vJVBqxMYE7G4x00nX
zcvVU%3D&reserved=0 We serve a wide area including the Cape Winelands
and Cape Town areas, of South Africa.
Mobile phone: +27 (0)82 785 7763
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Marius ZS1ML
Sent: Thursday, 15 August 2024 08:29
To: [email protected]
Subject: Re: [BITX20] Upgrade to Pi48GB Raspberry Pi
Dear Paul,
Thank you very much, that is very helpful, knowing that it can be done. I. was afraid that the 2GB would run out of resources with a few toeps opn. This is a computer after all and it may be useful to treat it as such. Ie have all the peripherals on that you need, keyboard, mics and headsets will go a long way to making it unbeatable.
I agree with the 64 bit OS and have basically decided to do so, as it seems to have more extras included.
73 en mooiloop,
73 and kind regards,
Marius Lubbe - ZS1ML
Chairman: Boland Amateur Radio Klub
.
bark.org.za%2F&data=05%7C02%7C%7Cccfb2fddeff849562cd808dcbd0d38ab%7C84
df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638593111687051609%7CUnknown%
7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJX
VCI6Mn0%3D%7C0%7C%7C%7C&sdata=WOcThWNd4tlN0TuKnX4b7Kkl29bSovN6fO8QXAKg
sPs%3D&reserved=0 We serve a wide area including the Cape Winelands
and Cape Town areas, of South Africa.
Mobile phone: +27 (0)82 785 7763
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Paul
Sent: Thursday, 15 August 2024 08:12
To: [email protected]
Subject: Re: [BITX20] Upgrade to Pi48GB Raspberry Pi
Hi Marius
I have swapped the supplied 2Gb pi out for an 8Gb pi and back again without any problems.
It is a mater of disconnecting cables from the pi and removing 4 screws to disconnect the pi from the radio board. No soldering, a bit fiddly but relatively easy to do.
The 8Gb upgrade does make a difference but if you wanted to keep costs down then 4Gb pi will still be a good improvement.
The difference is because the 2Gb pi can run out of resources when you start to run other programs as well as the sbitx app itself, for example I use JTDX for FT8 and while it does work fine, eventually audio error messages pop up and it means either stopping the program and restarting it or rebooting the pi for a quick solution. When I tested with an 8Gb pi I already had, I didn't experience these errors so I think a 4Gb pi would be ok if you wanted to keep costs down.
The other update I would suggest and would be a great learning
opportunity is to upgrade the OS to the 64-bit image that JJ built
(plenty of info in the group), that also makes some improvements as
well as providing some future proofing
Regards
Paul G0KAO
|
Re: Upgrade to Pi48GB Raspberry Pi
I would advise keeping the 7300.? It's nice to have 100 watts sometimes.
Gerry
toggle quoted message
Show quoted text
On 2024-08-15 06:36, Marius ZS1ML wrote: Sorry about the wrong word, its my mothertonque spelchecker doing it and I am not noticing.
BTW toeps=apps
I am considering letting my IC7300 go in favor of the SbitX V3. Any thoughts?
73 en mooiloop,
73 and kind regards,
Marius Lubbe - ZS1ML
Chairman: Boland Amateur Radio Klub
We serve a wide area including the Cape Winelands and Cape Town areas, of South Africa.
Mobile phone: +27 (0)82 785 7763
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Marius ZS1ML
Sent: Thursday, 15 August 2024 08:29
To: [email protected]
Subject: Re: [BITX20] Upgrade to Pi48GB Raspberry Pi
Dear Paul,
Thank you very much, that is very helpful, knowing that it can be done. I. was afraid that the 2GB would run out of resources with a few toeps opn. This is a computer after all and it may be useful to treat it as such. Ie have all the peripherals on that you need, keyboard, mics and headsets will go a long way to making it unbeatable.
I agree with the 64 bit OS and have basically decided to do so, as it seems to have more extras included.
73 en mooiloop,
73 and kind regards,
Marius Lubbe - ZS1ML
Chairman: Boland Amateur Radio Klub
We serve a wide area including the Cape Winelands and Cape Town areas, of South Africa.
Mobile phone: +27 (0)82 785 7763
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Paul
Sent: Thursday, 15 August 2024 08:12
To: [email protected]
Subject: Re: [BITX20] Upgrade to Pi48GB Raspberry Pi
Hi Marius
I have swapped the supplied 2Gb pi out for an 8Gb pi and back again without any problems.
It is a mater of disconnecting cables from the pi and removing 4 screws to disconnect the pi from the radio board. No soldering, a bit fiddly but relatively easy to do.
The 8Gb upgrade does make a difference but if you wanted to keep costs down then 4Gb pi will still be a good improvement.
The difference is because the 2Gb pi can run out of resources when you start to run other programs as well as the sbitx app itself, for example I use JTDX for FT8 and while it does work fine, eventually audio error messages pop up and it means either stopping the program and restarting it or rebooting the pi for a quick solution. When I tested with an 8Gb pi I already had, I didn't experience these errors so I think a 4Gb pi would be ok if you wanted to keep costs down.
The other update I would suggest and would be a great learning opportunity is to upgrade the OS to the 64-bit image that JJ built (plenty of info in the group), that also makes some improvements as well as providing some future proofing
Regards
Paul G0KAO
|
Re: Upgrade to Pi48GB Raspberry Pi
I would keep the IC7300, just a personal opinion as for me the SSB side of the sbitx needs work to improve it, I won¡¯t go into it here as there is lots of info about it in the group and of course you have 100w out of the IC7300. I have an FTdx10 I use at home, the sbitx was hopefully going to be my portable radio, great for digital and cw but not for phone in my view at the moment. I don¡¯t use CW but maybe one day :-)
Regards
Paul G0KAO
toggle quoted message
Show quoted text
On 15 Aug 2024, at 07:37, Marius ZS1ML via groups.io <ZS1ML@...> wrote:
?Sorry about the wrong word, its my mothertonque spelchecker doing it and I am not noticing.
BTW toeps=apps
I am considering letting my IC7300 go in favor of the SbitX V3. Any thoughts?
73 en mooiloop,
73 and kind regards,
Marius Lubbe - ZS1ML
Chairman: Boland Amateur Radio Klub
We serve a wide area including the Cape Winelands and Cape Town areas, of South Africa.
Mobile phone: +27 (0)82 785 7763
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Marius ZS1ML
Sent: Thursday, 15 August 2024 08:29
To: [email protected]
Subject: Re: [BITX20] Upgrade to Pi48GB Raspberry Pi
Dear Paul,
Thank you very much, that is very helpful, knowing that it can be done. I. was afraid that the 2GB would run out of resources with a few toeps opn. This is a computer after all and it may be useful to treat it as such. Ie have all the peripherals on that you need, keyboard, mics and headsets will go a long way to making it unbeatable.
I agree with the 64 bit OS and have basically decided to do so, as it seems to have more extras included.
73 en mooiloop,
73 and kind regards,
Marius Lubbe - ZS1ML
Chairman: Boland Amateur Radio Klub
We serve a wide area including the Cape Winelands and Cape Town areas, of South Africa.
Mobile phone: +27 (0)82 785 7763
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Paul
Sent: Thursday, 15 August 2024 08:12
To: [email protected]
Subject: Re: [BITX20] Upgrade to Pi48GB Raspberry Pi
Hi Marius
I have swapped the supplied 2Gb pi out for an 8Gb pi and back again without any problems.
It is a mater of disconnecting cables from the pi and removing 4 screws to disconnect the pi from the radio board. No soldering, a bit fiddly but relatively easy to do.
The 8Gb upgrade does make a difference but if you wanted to keep costs down then 4Gb pi will still be a good improvement.
The difference is because the 2Gb pi can run out of resources when you start to run other programs as well as the sbitx app itself, for example I use JTDX for FT8 and while it does work fine, eventually audio error messages pop up and it means either stopping the program and restarting it or rebooting the pi for a quick solution. When I tested with an 8Gb pi I already had, I didn't experience these errors so I think a 4Gb pi would be ok if you wanted to keep costs down.
The other update I would suggest and would be a great learning opportunity is to upgrade the OS to the 64-bit image that JJ built (plenty of info in the group), that also makes some improvements as well as providing some future proofing
Regards
Paul G0KAO
|
Re: Upgrade to Pi48GB Raspberry Pi
Sorry about the wrong word, its my mothertonque spelchecker doing it and I am not noticing.
BTW toeps=apps
I am considering letting my IC7300 go in favor of the SbitX V3. Any thoughts?
73 en mooiloop,
73 and kind regards,
Marius Lubbe - ZS1ML
Chairman: Boland Amateur Radio Klub
We serve a wide area including the Cape Winelands and Cape Town areas, of South Africa.
Mobile phone: +27 (0)82 785 7763
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Marius ZS1ML Sent: Thursday, 15 August 2024 08:29 To: [email protected]Subject: Re: [BITX20] Upgrade to Pi48GB Raspberry Pi Dear Paul, Thank you very much, that is very helpful, knowing that it can be done. I. was afraid that the 2GB would run out of resources with a few toeps opn. This is a computer after all and it may be useful to treat it as such. Ie have all the peripherals on that you need, keyboard, mics and headsets will go a long way to making it unbeatable. I agree with the 64 bit OS and have basically decided to do so, as it seems to have more extras included. 73 en mooiloop, 73 and kind regards, Marius Lubbe - ZS1ML Chairman: Boland Amateur Radio Klub We serve a wide area including the Cape Winelands and Cape Town areas, of South Africa. Mobile phone: +27 (0)82 785 7763 -----Original Message----- From: [email protected] < [email protected]> On Behalf Of Paul Sent: Thursday, 15 August 2024 08:12 To: [email protected]Subject: Re: [BITX20] Upgrade to Pi48GB Raspberry Pi Hi Marius I have swapped the supplied 2Gb pi out for an 8Gb pi and back again without any problems. It is a mater of disconnecting cables from the pi and removing 4 screws to disconnect the pi from the radio board. No soldering, a bit fiddly but relatively easy to do. The 8Gb upgrade does make a difference but if you wanted to keep costs down then 4Gb pi will still be a good improvement. The difference is because the 2Gb pi can run out of resources when you start to run other programs as well as the sbitx app itself, for example I use JTDX for FT8 and while it does work fine, eventually audio error messages pop up and it means either stopping the program and restarting it or rebooting the pi for a quick solution. When I tested with an 8Gb pi I already had, I didn't experience these errors so I think a 4Gb pi would be ok if you wanted to keep costs down. The other update I would suggest and would be a great learning opportunity is to upgrade the OS to the 64-bit image that JJ built (plenty of info in the group), that also makes some improvements as well as providing some future proofing Regards Paul G0KAO
|
Re: Upgrade to Pi48GB Raspberry Pi
Dear Paul,
Thank you very much, that is very helpful, knowing that it can be done. I. was afraid that the 2GB would run out of resources with a few toeps opn. This is a computer after all and it may be useful to treat it as such. Ie have all the peripherals on that you need, keyboard, mics and headsets will go a long way to making it unbeatable.
I agree with the 64 bit OS and have basically decided to do so, as it seems to have more extras included.
73 en mooiloop,
73 and kind regards,
Marius Lubbe - ZS1ML
Chairman: Boland Amateur Radio Klub
We serve a wide area including the Cape Winelands and Cape Town areas, of South Africa.
Mobile phone: +27 (0)82 785 7763
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Paul Sent: Thursday, 15 August 2024 08:12 To: [email protected]Subject: Re: [BITX20] Upgrade to Pi48GB Raspberry Pi Hi Marius I have swapped the supplied 2Gb pi out for an 8Gb pi and back again without any problems. It is a mater of disconnecting cables from the pi and removing 4 screws to disconnect the pi from the radio board. No soldering, a bit fiddly but relatively easy to do. The 8Gb upgrade does make a difference but if you wanted to keep costs down then 4Gb pi will still be a good improvement. The difference is because the 2Gb pi can run out of resources when you start to run other programs as well as the sbitx app itself, for example I use JTDX for FT8 and while it does work fine, eventually audio error messages pop up and it means either stopping the program and restarting it or rebooting the pi for a quick solution. When I tested with an 8Gb pi I already had, I didn't experience these errors so I think a 4Gb pi would be ok if you wanted to keep costs down. The other update I would suggest and would be a great learning opportunity is to upgrade the OS to the 64-bit image that JJ built (plenty of info in the group), that also makes some improvements as well as providing some future proofing Regards Paul G0KAO
|
Re: Upgrade to Pi48GB Raspberry Pi
Hi Marius
I have swapped the supplied 2Gb pi out for an 8Gb pi and back again without any problems.
It is a mater of disconnecting cables from the pi and removing 4 screws to disconnect the pi from the radio board. No soldering, a bit fiddly but relatively easy to do.
The 8Gb upgrade does make a difference but if you wanted to keep costs down then 4Gb pi will still be a good improvement.
The difference is because the 2Gb pi can run out of resources when you start to run other programs as well as the sbitx app itself, for example I use JTDX for FT8 and while it does work fine, eventually audio error messages pop up and it means either stopping the program and restarting it or rebooting the pi for a quick solution. When I tested with an 8Gb pi I already had, I didn¡¯t experience these errors so I think a 4Gb pi would be ok if you wanted to keep costs down.
The other update I would suggest and would be a great learning opportunity is to upgrade the OS to the 64-bit image that JJ built (plenty of info in the group), that also makes some improvements as well as providing some future proofing
Regards
Paul G0KAO
|
Re: Upgrade to Pi48GB Raspberry Pi
There's no soldering.? The hardest part is the video data cable
connector.
Gerry Sherman
Sent by the Windows 11 Thunderbird
On 2024-08-15 05:09, Marius ZS1ML
wrote:
toggle quoted message
Show quoted text
I am wondering whether I can order for myself a Raspberry Pi
48GB or supply same to the factory to use in a build for me, or
alternatively if that is a problem,?
How difficult is it to swop out the Raspberry Pi4B2GB for a *
GB version on a prebuilt version. I have to add that I am not
great with solder etc, as I have Parkinson's Disease to a light
degree.
?
I am also considering importing two units and hold stock in
my shop
for now, in order to introduce this unique radio to the market
in Southern Africa. The funds to spend for an average ham here,
especially young, new hams are limited, and getting a Xiegu is
not going to inspire and keep their attention like the SbitX V3.
?
Thanks you in anticipation.
?
Marius de ZS1ML
?
See my introductory article about the SbitX v3 that I wrote
to generate some interest, (it seems to be working, I am getting
enquiries for me to import the units) here: ?
|
Upgrade to Pi48GB Raspberry Pi
I am wondering whether I can order for myself a Raspberry Pi 48GB or supply same to the factory to use in a build for me, or alternatively if that is a problem,?
How difficult is it to swop out the Raspberry Pi4B2GB for a * GB version on a prebuilt version. I have to add that I am not great with solder etc, as I have Parkinson's Disease to a light degree.
?
I am also considering importing two units and hold stock in my shop for now, in order to introduce this unique radio to the market in Southern Africa. The funds to spend for an average ham here, especially young, new hams are limited, and getting a Xiegu is not going to inspire and keep their attention like the SbitX V3.
?
Thanks you in anticipation.
?
Marius de ZS1ML
?
See my introductory article about the SbitX v3 that I wrote to generate some interest, (it seems to be working, I am getting enquiries for me to import the units) here: ?
|
Re: ubitx audio amp problem discovered
Sorry...
?
Need to delete C62.
?
Skeleton's buffer has an input impedance of about 4.3K, not 310 Ohms.? RE (R63+R64)? needs to be between 271 and 406 for a voltage gain between 3 and 2.
?
I'll test this next month after I retrieve my scope and siggen from storage .
?
73, Andy
|
Re: ubitx audio amp problem discovered
Maybe I've got it...ish.
?
The current mic amp stage into a 50 Ohm load ranges in gain between 20 Hz (Av ~0.25) to 20 kHz (Av ~1.05).?
?
I think we'll still have to adjust RE as the gain into loads (the buffer) between 1K and 10k Ohm still appears to result in gains less than 1.
?
Using Skeleton's buffer with about a 309 Ohm impedance means we need an RE of about 79 Ohm for a gain of 3, and 118 Ohm for a gain of 2.
?
Maybe.
?
(I have to say - I'm liking the idea of winding a transformer more and more!)
?
73, Andy
|
I have a modded version of the N7DDC and it works great. I use it for 50w and under with my WA2EBY amp and many QRP rigs. The Emtech Z-match is also a great option, the main hold up for higher power would be the tuning caps.
|
zBITX xtal filter & general questions
I'm proceeding with the zBITX project using the FDIM "hat" and compendium article. Farhan suggested that users might learn a bit about DSP programming. I hope I might get to some of that, plus learn to use KiCAD and also learn some procedures for building complex C files in Linux and specifically learn a bit about the use of github for projects. This might be a long post so I'll try to break it into sections.
?
Crystal Filter
?
This was my first KiCAD project and I'm pleased with it despite a non-fatal error or two. Soldering in those tiny crystals was scary, but successful. Here's a section of the board with the crystals shown at the top, and a 1206 resistor for comparison:
?
?
My crystals required ~4.5 pF capacitors rather than the 2.2 pF in the schematic. Two part numbers were mentioned and I may have selected the wrong one.? (I used ABM8-40.000MHZ-B2-T from Mouser. The other option was ABM10AIG-40.000MHz-2Z-T.) My response curve isn't great but I think it'll do for now.? It's about 22 kHz wide and the high side roll-off isn't pretty.
The vertical scale is 10 dB/division and horizontal is 5 kHz/division.
?
?
OLED display
?
I'm not sure if I'm using the right type or not. It's a 0.96", 128x64.? I wasn't sure which I2C interface to connect to, so I tried them all with no output seen. Is it supposed to be the _BB "bit-banging" version?
?
One person reported a missing file message regarding the OLED. I haven't experienced that but am still interested in Farhan's response of August 6, 2024 about the branch. Which leads to ...
?
Github, branches, 64 versus 32 bit ??
?
I started with a memory card image from Farhan. It ran on my Pi 4B and showed the program on my HDMI monitor.? Following later discussions, I upgraded (I guess) to the 64 bit image posted by JJ.? It also ran OK, showed output, controlled the Si5351a in the hat.
?
Now, are there 32 bit and 64 bit realms out there?? If I follow Farhan's instructions on the OLED file, will it work with my current 64 bit system?? How does a branch work?? Is it a complete set of source code for the entire project, with some changes to its parent version?? I obviously need to go to school on github. Is the Farhan branch the right thing for me to be using with the zBITX project?
?
OK, that's enough for now.? I've completed a KiCAD board for the superhet section, but am trying to be patient and make sure I have it the way I want it before ordering the board.
?
73
?
Nick, WA5BDU
?
|
We are in the middle of designing a generic automatic tuner for the T41 project that is extremely wide ranged (20-1200+ ohms impedance match), handles 100 watts, and does not use ¡°hunt and peck/ branch and bound search¡± to find the tuner solution.? Instead, the small on-board processor determines the impedance of the antenna from acquired phase and amplitude information, calculates the transform to 50-ohms real, and applies the transform¡ then trims it as needed to make a perfect match (this is similar to some military tuners).? It all happens so fast you never knew it happened.? Then stores matches for future use. ? I suspect it will be done some time in October and offered as a board or a kit.? Generic for all radios, and dirt cheap like all of our projects. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ?
|
https://www.qsl.net/wb3gck/tuner.htm
|
I have one of those small atu units you mentioned, supposedly powered with a battery rated 100 watts on the way. It will be primarily for portable.? Inside the house I have a large? tuner. Quality of it? I have no idea. Granted, there will be losses on feed line while camping unless I convert to balanced, or use a resonant antenna,? as I have been considering.?
Scotty WD4PYT?
I have a manual tuner, the z match kit from emtech is a good tuner.? It's rated for 20 watts.? I will look at it to see if it can be modified to handle the 40 watts from the sBitx.? I was looking for an automatic tuner.? I'd seen the N7DDC version and wondered what people actually used.? My thoughts are that an auto might keep me from smoking the finals.? I thought of getting a kit and building it into the sBitx.? Just thought I'd ask.
|
I have a manual tuner, the z match kit from emtech is a good tuner.? It's rated for 20 watts.? I will look at it to see if it can be modified to handle the 40 watts from the sBitx.? I was looking for an automatic tuner.? I'd seen the N7DDC version and wondered what people actually used.? My thoughts are that an auto might keep me from smoking the finals.? I thought of getting a kit and building it into the sBitx.? Just thought I'd ask.
|
Re: ubitx audio amp problem discovered
Hi Farhan,
?
? Thanks for your look at the circuit fragments. I see how a simple buffer (just a 3904 and emitter resistor) can be DC coupled.
?
? ?I'm back in the water, and back to trying to wrap my mind around the mic amp.? Unfortunately, the above analysis and the basic common emitter design info in internetlandia and The Art of Electronics don't seem to match.
?
Gain...? If gain is estimated by R sub C over R sub E, and if R63 and R64 in series is the DC portion of R sub E, the gain would be 0.68.? Removing R63 suggests a gain of 1. It seems for a gain of 2 to 3, R sub E should be between 333 and 500 Ohms.
?
If the above is incorrect, what else is happening to "adjust" the gain of that stage (and to make the common emitter amp rules of thumb not work)?
?
Would you please confirm which parts in the emitter circuit you suggested removing? I figured at least C62. Did you intend that one of the Rs (63 or 64) go as well?
?
I'll be traveling back to my storage place in September and will be returning with my scope and 2-tone generator. ?One way or another I want to figure this out.
?
Thanks and 73
Andy
Happily back MM
|
Bdale, KB0G,
Thanks for the link.
No doubt, you are correct that Asshar was not referring to a specific circuit.
?
I also found the Z-Match available as kit or prebuilt at
also as homebrew project at
and a capacitively coupled variation at
?
But, of course, Bob (KD2YUG) was asking about Automatic Tuners. I have never used one. Presently, my only antenna is a fixed magnetic loop with a simple remote tuner (requiring the operator to control the tuning process). See my QRZ.com page.
?
If I add a long wire, I'll probably try a Z-Match or some variation.
?
73, Dave
|
Bob Brown
N8DAH
Nick Kennedy
K9HZ
Scotty R