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Resistors
I'm sorry, one more point. With so many resistors, you've got a serious problem.? Storage. I use #6 coin envelopes that I got from Staples a long time ago in a galaxy far away (Dallas).? 250
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chuck adams
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#8969
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Re: Lifetime resistor supply
But Dave,? didn't you find that the metal films produced less RF noise?? Of course, when you need a 100ohm resistor, all you have is 91ohms........ chuck, aa7fo
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chuck adams
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#8968
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Re: Lifetime resistor supply
I have not gone through.?? My English is better than that.? Speed typing sucks.
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chuck adams
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#8967
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Re: Lifetime resistor supply
You did good with those carbon film resistors Chuck. Most of the resistors in my stash are the now ubiquitous 1% metal film types. Nice and stable, tight tolerance. Agreeable in every way, apart from
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Dave AA7EE
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#8966
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Re: Lifetime resistor supply
Ask and you shall receive.? Amazon (let's make Jeff richer site) and search for "1/4W carbon film resistor kit" and you get a large selection that I have done gone through.? I just picked this. FYI
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chuck adams
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#8965
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Re: Manhattan Construction Classes
I'm about to post my second video in an hour.? In it there is a cheap Chinese component tester.? Find them on amazon and all your favorite critter suppliers online.? Attached photo.? I have one
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chuck adams
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#8964
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Re: Lifetime resistor supply
Thank you. These sound ideal as -- I am sure you know -- the blue colored ones are the devil to distinguish green, red, blue, etc. If you care to share a link, I'm sure others would appreciate same.
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k6whp
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#8963
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Re: Lifetime resistor supply
William, Four strips, so they are marked for precision range. Body is tan, typical for carbon film resistors. FYI chuck, aa7fo
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chuck adams
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#8962
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Manhattan Construction Classes
Hi Chuck, Can I make a recommendation for your Manhattan Construction Classes? Can you make a video about matching diodes? Thanks! Alan, N8WQ
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Alan N8WQ
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#8961
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Re: Lifetime resistor supply
Are they four stripe or five stripe coded and are the resistor bodies blue or tan? -- William, k6whp -------------------- "Cheer up, things could get worse. So I cheered up and things got worse."
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k6whp
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#8960
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Crystal Experiment for Beginners and Experts Alike
I'm in the middle of a big project, but I ran across a need for the following and I'm on a side excursion in the lab for a few hours and I thought some in the group might be interested in trying
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chuck adams
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#8959
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Re: JST crimping
Jim, you may want to check out this website: https://www.mattmillman.com/info/crimpconnectors/common-jst-connector-types/ Best, AK6GX
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Dan K.
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#8958
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Re: Crystals
Daniel, A preamble: this group is loaded with wizards and these guys (and gals) know a lot about stuff. That I recommend other sources by no means discredits
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k6whp
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#8957
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Re: Crystals
Tim, Do you have to install some firmware on your nanovna for it to work?? And that you have to make sure it is certain nanovna?? not all will work. Firmware is something called Dislord? I have
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Daniel KK4MRN
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#8956
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Re: Crystals
In this photo, I have not taken the time to calibrate/zero-out my test setup, so the displayed data is far from accurate. I¡¯m only trying to show how I test crystals. The other pic is my test jig. I
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Tim Tyler II
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#8955
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Lifetime resistor supply
Received today from amazon from an order made yesterday:? 3120 pcs 1/4W 5% Carbon Film Resistor assortment kit.? Price:? $17.99.? Trusty HP-35 calculator says $0.0058 per critter. Measured random
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chuck adams
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#8954
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ADC 40 to 20 conversion progress
I have a partial ADC 20 conversion receiver section built but I'm not sure the 9 MHz IF filter is working properly--I don't have any 9 MHz crystals that have much Q, for one concern. I decided to
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Steve Ratzlaff
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#8953
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Re: Crystals
Watching this conversation with interest. I am surprised nobody has mentioned using a nanoVNA to characterize crystals. I did this with a bag of 10MHz crystals, sorting to spreadsheet, and was able to
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Tim Tyler II
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#8952
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Re: Crystals
Thanks Steve. I had another thought on this subject last night and I cobbled together a quick test. Stable frequency generators and high resolution counters might not be on everyone's bench. For fun,
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Michael Maiorana
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#8951
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Re: 2N2/40 Transceiver Project
You're going to really enjoy the 2N2/40 Alan. I built mine from the kit, and used it as my only rig for the first few months after building it. My entire station was the 2N2/40, a little straight key,
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Dave AA7EE
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#8950
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