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Re: R5 Resistor Network Substitution
If you would like a few of the these in the sip 8 package, I have some extras that I had planned to offer up to the group either for give away or trade. A trade is not required. they are free for the
By Chris Gross · #14405 ·
j309 transistor and MVAM109 varactor
Hi All, I'm newbie in NorCal NC40A. My 11 pcs PCB is arrived yesterday from allpcb.com (will be make early Christmas gifts to my local HAM friends in Burgas, Bulgaria). Have a question: Will be able
By Dimitar Pavlov · #14404 ·
New file uploaded to [email protected]
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group. *File:* BOM NorCal40A - US Ver. 1.8.pdf *Uploaded By:*
By [email protected] Notification <qrp-tech+notification@...> · #14403 ·
This Saturday, Dec 2, AZ ScQRPions Meeting and Mesa Hamfest/Swapmeet
This coming Saturday, starting at 0700hrs is the Mesa Hamfest at the Mesa Community College. It is also the first Saturday of the month so it is Club Meeting Day as well! About 10:45 to 11:00 bring
By Michael Baker <k7ddmjb@...> · #14402 ·
Re: NC40A BOM v1.17 errata?
gOOd Morning Tom, thanks for your hint about the misleading Pos. 45. There will an errata Ver. 1.8 been publish today. I just mailed it to Chuck. I did not see a 4M7 R in the original design and BOM
By sTef - DM5TU/VY1QRP · #14401 ·
Re: R5 Resistor Network Substitution
That will work Bill. Chuck talks about it in his video: https://www.youtube.com/watch?v=rSAgeJHw_WM Al, N8WQ
By Alan N8WQ · #14400 ·
Re: NC40A: 78L08 Bypass Capacitors
They are as they were on the original NC40A.? It doesn't seem to be that critical here. chuck, k7qo
By chuck adams · #14399 ·
NC40A: 78L08 Bypass Capacitors
Could the voltage regulator bypass capacitors of the NC40A be better located? The schematic shows both a 10uF and 0.047uF in parallel at the input. Datasheets on the 78L08 recommend a 0.33uF on the
By [email protected] · #14398 ·
R5 Resistor Network Substitution
Sorry if this has already been addressed. Attempted a search but did not find topic. This is in respect to the R5 resistor network. Does anyone have any guidance on using/wiring individual 2,2M¦¸
By William <k6whp@...> · #14397 ·
Re: Trim Pot URL
Another option would be Tayda Electronics.? Six cents each and they ship from the US,? I usually get parts within a week. And, they have very low shipping costs for small orders.
By DuWayne Schmidlkofer · #14396 ·
quartz crystals
all of the chat of crystals and oscillators has been informative. There are a number of interesting videos on youtube on the subject. I am sure some on the list have seen some or all of them before
By Graham <planophore@...> · #14395 ·
Re: Substituion of Varactors in 2N2 40+
Hi all, I've been struggling to add attachments, so this may or may not work. Attached (hopefully) are the BB809 and 910 voltage capacitance data. They are somewhat similar......??? Or perhaps your
By Alun VK4LUN · #14394 ·
Re: Things to watch out for building crystal oscillators
John. AD5UE. makes some good points. 1.? Crystals do age.? Ever looked at a crystal blank?? They are frosted, like frosted window glass.? Think of a mountain range.? That is what the surface
By chuck adams · #14393 ·
Trim Pot URL
OK, thing disappeared is my guess for the item number given. I should have used the link before approving it. Will try harder. Here is a sample similar to what I bought.? Not the same vendor. Search
By chuck adams · #14392 ·
Re: Things to watch out for building crystal oscillators
The way I do it is thus: Crystals age. If you measure them and then repeat the procedure 24 hrs. later, the results will be different. First, use good quality crystals, usually of a name brand like
By John Backo · #14391 ·
Re: NC40A Trim pots
I ran out in my supply of various values in a plastic box.? So, I thought I'd try this vendor. Item #231679255669 20 for $1.81, how can I go wrong?? :-)? I'll check them first with a DMM before
By chuck adams · #14390 ·
NC40A Trim pots
Has anyone bought their 10K (R6) and 500 ohm (R8 and R13) trim pots on ebay?? What auctions did you buy?? How did they work and fit? Thank you. Jim Pruitt WA7DUY
By Jim Pruitt WA7DUY · #14389 ·
Norcal 40a boards
I just received my board order. Who needs one? I am willing to give 7 of them to any one that needs one. Joel WM4P
By WM4P · #14388 ·
Re: Things to watch out for building crystal oscillators
I think you might be over thinking this, Mike. Once you have the rig working its easy, at least it was for me. If you have ever had a rig with adjustable BFO or Passband tuning, its obvious from the
By wb6ogd · #14387 ·
LC100-A Enclosures?
What if any enclosures are being used with/for the LC100-A...? Seem to be a little vulnerable in the as-supplied construction... ;-) Did see one from a 3-D printer... Chuck Carpenter, W5USJ EM22cv,
By Chuck Carpenter <w5usj@...> · #14386 ·