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Re: Project #2 -- Colpitts Crystal Oscillator
Yep! Worked for me too. Says I have ten on the way. :) Larry KA5T ...
By Larry KA5T · #14365 ·
Re: Project #2 -- Colpitts Crystal Oscillator
..as Lee did, so did I. Thanks, Chuck! The instructions were dead on! -- William, K6WHP "Cheer up, things could get worse..so I cheered up and, sure enough, things got worse!"
By William <k6whp@...> · #14364 ·
Re: New file uploaded to [email protected]
I just use the Instant Quote.? It doesn't involve waiting on a human being.? YMMV. You do not need to re-register.? The G6 thing is to keep as many qrp-tech guys and girls accounted for.? I'm
By chuck adams · #14363 ·
Re: New file uploaded to [email protected]
Chuck, When you order these boards for Project 2, do you need to go to the "real person quote" button or to the "Instant quote" area?? If the instant quote area is where to go, they ask for the board
By Leland L. Bahr · #14362 ·
Re: 13.5 MHz Suitable IF frequency?
Paul, Jim, Thanks for your responses. I have no idea where these crystals came from, but I've had them for quite some time. I took some time to match up what I could by measuring the frequency of each
By Michael Maiorana · #14361 ·
Re: Substituion of Varactors in 2N2 40+
If the varactor you have has a larger capacitance variation than you need there are 2 things you can do. As I think you mentioned you can limit the voltage variation. This might be good as it could
By Mike WA8BXN · #14360 ·
Re: Substituion of Varactors in 2N2 40+
Soooo... I looked up the specs for the BB910 and got a Vr of 40v and capacitance of 40pf Reverse voltage (VR): 30 V Forward current (IF): 20 mA Capacitance (VR max): 2.5 pF Capacitance (VR = 0V): 40
By Alun VK4LUN · #14359 ·
Re: Project #3 -- Comb Generator
For anyone who might have missed the reference in my article, there was a superb talk this year at Baycon by Beric K6BEZ about building your own RF test equipment. In his slides he shows how he tests
By Tony Fishpool · #14358 ·
Re: Project #3 -- Comb Generator
Many thanks to Terry VK5TM for spotting my web page coding error (now fixed). Terry's files are also now available from the same link. www.fishpool.org.uk/combgenerator.htm#gerber 72/3 Tony G4WIF
By Tony Fishpool · #14357 ·
Re: Project #2 -- Colpitts Crystal Oscillator
OK, I got ten Project 2 Colpitts boards ordered.? I looked at your video and you said the proto board was 5 cm.? Using this,? I ordered the boards putting in 50 mm for both dimensions.? I was able
By Leland L. Bahr · #14356 ·
Re: Project #2 -- Colpitts Crystal Oscillator
In the Files section look at the description for "K7QO PCB 001 -- Colpitts Crystal Oscillator" and you will see it says dimensions are 50 mm x 50 mm
By Michael Thompson · #14355 ·
Re: Project #2 -- Colpitts Crystal Oscillator
How would we know the size of the board? Lee, w0vt
By Leland L. Bahr · #14354 ·
Re: Project #2 -- Colpitts Crystal Oscillator
Here are the steps as I see them.? Hopefully I will get this right and it works for you. 0.? Download to your computer system the .zip file that has the Gerber files in it. Do not unzip. 1.?
By chuck adams · #14353 ·
Re: Project #2 -- Colpitts Crystal Oscillator
Chuck, The Crystal Checker board looks interesting and I am attempting to place an order with ALLPCB but cannot seem to find where/how the Gerber .zip archive should be uploaded. If you or others will
By William <k6whp@...> · #14352 ·
Re: New file uploaded to [email protected]
OK.? I see the confusion.? I did not release the first set of boards except one to KI6DS, so I changed to 001.2 on the labeling of the new boards.? Did not think to add the .2 to the file name and
By chuck adams · #14351 ·
Re: New file uploaded to [email protected]
OK, thanks.? (I saw the GERBER file showed version 1.0 and wasn't sure.) Lee, w0vt
By Leland L. Bahr · #14350 ·
Re: New file uploaded to [email protected]
Yes.? I wouldn't have you do the first round.? Not ever. chuck, k7qo
By chuck adams · #14349 ·
Re: New file uploaded to [email protected]
Chuck, Is this Gerber file for the second round of boards you had made? Lee, w0vt
By Leland L. Bahr · #14348 ·
Re: 1N4004 vs MV209 Tuning Range
Thanks, Chuck. Very interesting. Lee, w0vt
By Leland L. Bahr · #14347 ·
Re: Project #2 -- Colpitts Crystal Oscillator
Chuck, some guys will think what am I going to do with 10 boards? I only need 1. Guess I could give them to my friends, but I only have 1, what do I do with the other 8 boards? You are wrong my
By Doug Hendricks <ki6ds13@...> · #14346 ·