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Re: A song of praise for Hans Summers
Axel, these lyrics can be sung to the tune of "Livin' on a Prayer" by Bon Jovi. Enjoy. :-)
By Randy K7RAN · #105184 ·
Re: Kicad Expert ?....
It looks like your pin spacing and via dimensions are wrong... I found the OSC5A2B02 on ebay showing pin 1-3 and 1-5 with 19.05mm spacing.. pins 0.8mm. https://www.ebay.com/itm/332389156868 Your
By Bob, WO6W <bobhome@...> · #105183 ·
QDX on thirty meters
Tnx QSO, N3OIK.
By n4qa at_hotmail.com <n4qa@...> · #105182 ·
Re: 50W amplifier - 13.8V power supply
I found this right after my last post. The LRS-350-12 has an even higher current capability. I suppose if you were to invest in a new supply, you'd just go for a 24V or 50V supply anyway, so I may
By Johnanthony_delponte@... · #105181 ·
Re: 50W amplifier - 13.8V power supply
Took a quick look in the instruction manual and project page. Couldn't find anything on current draw. You could try throwing a fuse in line with the DC supply that's close to 2.89A and see the
By Johnanthony_delponte@... · #105180 ·
Re: QMX L401 winding confusion
band pass, not band add
By Curt M. · #105179 ·
Re: QMX L401 winding confusion
Hasn’t the first part been reduced to 17 turns pushed tightly together or 19 turns spread out? ?I rewound mine with 19 turns spread out and I saw the filter results against someone that did 17
By Curt M. · #105178 ·
Re: Kicad Expert ?....
Hi Mike, here it is. this is my first try at the thing. Stay tuned for the 3d Layout... Giuseppe Marullo IW2JWW - JN45RQ PS: please *DO* check pin orientation, hope it is right but it is easy to
By Giuseppe Marullo[iw2jww] · #105177 ·
Unknown USB device
I get the error message unknown USB device cod 43 on my win 11 computer. Also tried on a win 10 computer but same error. Also tried on a win 8 laptop where I downloaded the recommended driver in the
By SA4FBO · #105176 ·
Microcontroller Projects for Amateur Radio
All: A number of you have written me privately to ask what is covered in Al's and my Microcontroller Projects for Amateur Radio book. I went to the ARRL's web page for the book and you were right--it
By jjpurdum · #105175 ·
QMX bugs
As I play more on the air with the QMX, I'm enjoying it more and more. Multi bands is great in a rig this size. I have been keeping track of little bugs. I am mainly a CW guy so my observation will
By mike/w1mt · #105174 ·
Re: Kicad Expert ?....
Is this one? https://easyeda.com/components/CTI-OSC5A2B02-10Mhz-OCXO_ea1ce85e0ab7468eb8857e8e97ff70f8 Giuseppe Marullo IW2JWW - JN45RQ
By Giuseppe Marullo[iw2jww] · #105173 ·
Re: New assembled High Bands QDX went into smoke
That goes mean, better using only 11V to get not more than 3-4 Watts to protect the BS170 transistors. In this case two zener diodes make really sense. better to have trx with 3-4 Watts working than a
By [email protected] · #105172 ·
Kicad Expert ?....
I'm trying to build a Kicad Device schematic symbol and PCB footpring for the CTI OSC5A2B02 vctcxo. and failing at the first fence. All tutorials are for very simple 2 pin devices with no useful
By Mike · #105171 ·
Re: LunchboxesQCX
I use 5 QCX including QCX-mini for different bands. I use 4x Li-On 16V as batteries. I always tune the antenna with the ATU-100. I've never had a problem with the BS170 before. 73 Zdenek
By Zdenek OK2BQN · #105170 ·
Re: New assembled High Bands QDX went into smoke
The relevant voltage is NOT 12V. The RF voltage is over 40V. For 5W into 50 ohms the voltage is roughly 47 V p-p. If the SWR is greater than 1:1 the voltage goes up. The BS170 has a max voltage of
By David Birnbaum · #105169 ·
50W amplifier - 13.8V power supply
If I use a 50W amplifier for QCX series with a 13.8V power supply, knowing that the output power will be reduced to around 15 to 20W what will be the DC intensity? I ask this question in order to know
By Pierre - FK8IH · #105167 ·
Re: QMX L401 winding confusion
Cliff, I'm looking at version 1.00f of the manual, dated July 8. Is there a newer version that I am not aware of? This is the image I am referring to. It clearly shows two taps, not one, and a 29th
By Mark Volstad - AI4BJ · #105166 ·
Re: Dumb QMX question
Fancy Schmancy cable....(Hi Hi) Not_So_Anonymous
By Bob Finch · #105165 ·
Re: New assembled High Bands QDX went into smoke
WB2CBA, The Zener trick you mention has been around and written up by some others before. After I found out about it, I added 51 V 1 W Zeners to my QDX and incorporated them into my QMX. I have 3
By Daniel Walter · #105164 ·