Re: PC Boards for QEX Step Attenuator Available
On Thu, Sep 23, 2021 at 09:31 AM, vbifyz wrote:
For a poor ham's step attenuator design, look here:
Nicely done Mike! Just a quick question - why do you need "dual" jumpers? Would it work if you have a single jumper per attenuator, so either you have attenuator engaged (jumper off) or shorted "jumper on"? If I see it correctly, in your design, in order to "engage" the attenuator u must remove one "bridge" (horizontal) and put two (vertical) in, right? THANKS for the work put in!
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Re: #tutorials ANTENNA IMPEDANCE MATCHING SIMPLIFIED
#tutorials
On Fri, Sep 24, 2021 at 07:35 AM, <chris_group_mail@...> wrote: ... Somebody must have an app for that, which starts with an impedance and generates the L and C values needed to match it
to a transmission line. And to answer to the google search string with another - "impedance matching lc calculator" :) Here are some I use the first one often
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Re: #tutorials ANTENNA IMPEDANCE MATCHING SIMPLIFIED
#tutorials
I have read it and as a complete beginner to this it looks very useful. It's increased my understanding of the matching process.
Intriguing that for a simple single frequency all that's involved is rotating the point about various circles so what is needed is to determine the intersection between two circles. Somebody must have an app for that, which starts with an impedance and generates the L and C values needed to match it to a transmission line. Have looked but can't find anything, maybe I'm not using the correct terms.
Chris
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ALL- I never saved the link and I looked at Banggood.com and do not see any like the ones I had. Frankly that purchase was pre-pandemic and Banggood is like Amazon.. A collaboration of individual sellers that use the common website for advertising..
This is not the only thing I saw come and go on Banggood, Same with shipping time and is today's price what it was pre-pandemic.. Also pre-pandemic they had free shipping, then free shipping on orders over $49.. Now.. It's all different..
So- it is what it is.. Frankly at $1.65 I think the guy figured out he wasn't making money ---or-- the product was some sort of blow out sale to get rid of what he had..
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Re: #tutorials ANTENNA IMPEDANCE MATCHING SIMPLIFIED
#tutorials
Yes and thank you for posting the link. At the time of my post I was on a computer interface that was very minimal!!!
However, again thanks and that is the correct location.
Enjoy.
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Re: #tutorials ANTENNA IMPEDANCE MATCHING SIMPLIFIED
#tutorials
I did not read it either, however here is the link:
John
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of AB6BT Sent: Thursday, September 23, 2021 5:35 PM To: [email protected]Subject: Re: [nanovna-users] #tutorials ANTENNA IMPEDANCE MATCHING SIMPLIFIED Actually he stated: "Antenna Impedance Matching Simplified authored by company Abracon" "Type the above into your search engine. "
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Re: #tutorials ANTENNA IMPEDANCE MATCHING SIMPLIFIED
#tutorials
Larry-
No worries, I understand...
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Re: #tutorials ANTENNA IMPEDANCE MATCHING SIMPLIFIED
#tutorials
Plug in the search phrase: Antenna Impedance Matching Simplified
authored by company Abracon
It will get you there.
Dave - W?LEV
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On Thu, Sep 23, 2021 at 10:05 PM Larry Rothman <nlroth@...> wrote: Uh.....Alan, you forgot the link.....
On Thu., 23 Sep. 2021 at 4:14 p.m., alan victor<avictor73@...>
wrote: Here is a well written short 5 page pdf on the topic. Written and
illustrated very nicely.
Antenna Impedance Matching Simplified authored by company Abracon
Type the above into your search engine.
Alan
--
*Dave - W?LEV*
*Just Let Darwin Work*
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Re: #tutorials ANTENNA IMPEDANCE MATCHING SIMPLIFIED
#tutorials
Sigh.? It's been a long day :( On Thu., 23 Sep. 2021 at 6:35 p.m., AB6BT<AB6BT@...> wrote: Actually he stated: "Antenna Impedance Matching Simplified? authored by company Abracon" "Type the above into your search engine. "
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Re: #tutorials ANTENNA IMPEDANCE MATCHING SIMPLIFIED
#tutorials
Actually he stated:
"Antenna Impedance Matching Simplified authored by company Abracon"
"Type the above into your search engine. "
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Re: #tutorials ANTENNA IMPEDANCE MATCHING SIMPLIFIED
#tutorials
Uh.....Alan, you forgot the link.....? On Thu., 23 Sep. 2021 at 4:14 p.m., alan victor<avictor73@...> wrote: Here is a well written short 5 page pdf on the topic. Written and illustrated very nicely. Antenna Impedance Matching Simplified? authored by company Abracon Type the above into your search engine. Alan
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#tutorials ANTENNA IMPEDANCE MATCHING SIMPLIFIED
#tutorials
Here is a well written short 5 page pdf on the topic. Written and illustrated very nicely.
Antenna Impedance Matching Simplified authored by company Abracon
Type the above into your search engine.
Alan
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Re: PC Boards for QEX Step Attenuator Available
Thanks
*Clyde K. Spencer*
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On Thu, Sep 23, 2021 at 1:14 PM vbifyz <3ym3ym@...> wrote: If you are asking about my design, it is -1dB at 500MHz and -2dB at 1GHz.
73, Mike AF7KR
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Could you forward a link to the $1.65 strippers please?
73, and thanks,
Dave (NK7Z)
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
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On 9/23/21 10:01 AM, Larry Macionski via groups.io wrote: I have bought strip tools from Banggood.com instead of Ham Radio Outlet. Granted they take 3-4 weeks but they were like $1.65 USD.. I always order multiples as if ordering one and waiting a month it's broken is counterproductive.
The ones i get have a "plug" you can rotate for RG-174, RG-58/59, RG-6U/RG8X, or RG8/9913 that sets razor blade depth..
I surplus my extras- at ham fests for a $1 more. or as "door prizes" at Club meetings trading them for tickets in the 50/50 raffle.. winner gets a whole, not a half of the stripper..
Always demand the whole stripper... This is true even if not a ham..
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Hi, Larry,
Any chance of a link or name? I've looked on Bangood and found a "universal" coax stripper which could be useful but only goes down to 3.2mm. I use a lot of RG176/4 which is much thinner. The one you describe with the plug seems ideal for my use.
Thanks - Michael.
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On 23/09/2021 18:01, Larry Macionski via groups.io wrote: I have bought strip tools from Banggood.com instead of Ham Radio Outlet. Granted they take 3-4 weeks but they were like $1.65 USD.. I always order multiples as if ordering one and waiting a month it's broken is counterproductive.
The ones i get have a "plug" you can rotate for RG-174, RG-58/59, RG-6U/RG8X, or RG8/9913 that sets razor blade depth..
I surplus my extras- at ham fests for a $1 more. or as "door prizes" at Club meetings trading them for tickets in the 50/50 raffle.. winner gets a whole, not a half of the stripper..
Always demand the whole stripper... This is true even if not a ham..
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Got a link to those Coax Strippers ? I searched Banggood and all I got were a lot more expensive !! 73, Dick, W1KSZ ________________________________ From: [email protected] < [email protected]> on behalf of Larry Macionski via groups.io <am_fm_radio@...> Sent: Thursday, September 23, 2021 10:01 AM To: [email protected] < [email protected]> Subject: Re: [nanovna-users] Stripping Coax I have bought strip tools from Banggood.com instead of Ham Radio Outlet. Granted they take 3-4 weeks but they were like $1.65 USD.. I always order multiples as if ordering one and waiting a month it's broken is counterproductive. The ones i get have a "plug" you can rotate for RG-174, RG-58/59, RG-6U/RG8X, or RG8/9913 that sets razor blade depth.. I surplus my extras- at ham fests for a $1 more. or as "door prizes" at Club meetings trading them for tickets in the 50/50 raffle.. winner gets a whole, not a half of the stripper.. Always demand the whole stripper... This is true even if not a ham..
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Re: PC Boards for QEX Step Attenuator Available
If you are asking about my design, it is -1dB at 500MHz and -2dB at 1GHz.
73, Mike AF7KR
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I have bought strip tools from Banggood.com instead of Ham Radio Outlet. Granted they take 3-4 weeks but they were like $1.65 USD.. I always order multiples as if ordering one and waiting a month it's broken is counterproductive.
The ones i get have a "plug" you can rotate for RG-174, RG-58/59, RG-6U/RG8X, or RG8/9913 that sets razor blade depth..
I surplus my extras- at ham fests for a $1 more. or as "door prizes" at Club meetings trading them for tickets in the 50/50 raffle.. winner gets a whole, not a half of the stripper..
Always demand the whole stripper... This is true even if not a ham..
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Re: Antenna / VNA Question
Looks like TLDetails:
Vince N2JRS
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Chris K2STP Sent: Thursday, September 23, 2021 12:06 PM To: [email protected]Subject: Re: [nanovna-users] Antenna / VNA Question Roger, What software are you using with those screen shots showing "Transmission Line Details"? I have never seen that display before....? Thanks in advance.... -- Regards, Chris K2STP
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Re: Antenna / VNA Question
Roger,
What software are you using with those screen shots showing “Transmission Line Details”? I have never seen that display before….? Thanks in advance….
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Regards,
Chris K2STP
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Larry Macionski
John Slaughter
Dick
vh2
Chris K2STP