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Re: The end of inexpensive printed circuit boards and parts
I ordered a Made in USA backpack on eBay and had to clear customs It was used 25% tarrif applied by Canada to US products coming in. China is 10% tarrif . Canada is friendly to CCP for so many reasons
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John
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#9232
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Re: Trimmer Capacitor Kits on Amazon.com
Ditto. Tayda = almost always fine business parts for much less. Regards, Kirk, NT0Z My book, "Stealth Amateur Radio," is now available from www.stealthamateur.com and on the Amazon Kindle (soon)
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Kirk Kleinschmidt, NT0Z
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#9231
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Re: Trimmer Capacitor Kits on Amazon.com
Chuck, I buy my trimmer caps from Tayda Electronics. They just restocked most values. 72/73 Jim, K8IQY PS...I'm around today to try a qso on 17 meters. Pick a time and I'll be there. Something near
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Jim Kortge, K8IQY
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#9230
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Re: Encyclopedia of Electronics Vols 1-6
No, it's my link ended up with some stray characters in it. https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/Encyclopedia-of-Electronic-Circuits-Vol.3.pdf -- Terry VK5TM www.vk5tm.com (
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Terry VK5TM
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#9229
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Trimmer Capacitor Kits on Amazon.com
Choices are Honbay or Acxico.? Any preference or experiences with either or both? -- chuck adams, aa7fo WAS-17 QRP --> TX,FL,SC,GA,OK,AR,KS,AL,AZ
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chuck adams
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#9228
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Re: Encyclopedia of Electronics Vols 1-6
Looks like both worldradiohistory and archive have removed the download option from all but the one volume. Jim Pruitt WA7DUY
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Jim Pruitt WA7DUY
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#9227
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Re: Help aligning VFO (Ozark Patrol regen)
Yes, that's what mine does, as I wrote (not swapped). Steve
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Steve Ratzlaff
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#9226
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Re: Help aligning VFO (Ozark Patrol regen)
Are you sure the 5.24 and 5.46 aren't swapped? I calculated that the minimum capacitance of the circuit is -78 pF... [email protected]> wrote:
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Ross Tucker (NS7F)
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#9225
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Re: Adding to the KN5L ft test fixture.
https://techlib.com/newprojects.htm???? (And I misspelled his name, it's Wenzel.)?? You need an RF source such as the popular function generators/AWGs, some go past 30 MHz. His tester takes the
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Steve Ratzlaff
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#9224
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Re: Help aligning VFO
QSL I was merely addressing your earlier stated requirements. Obvious to reduce the upper range a smaller range variable cap is needed. Then as you or others describe, a band switch with different
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Curt
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#9223
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Re: Adding to the KN5L ft test fixture.
Ok, I give up. It is easy to do a relative measurement of Ft, i.e. compare 2 transistors. But I can not yet achieve the absolute accuracy using my setup. First, the diode detector is non-linear at low
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vbifyz
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#9222
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Re: Help aligning VFO (Ozark Patrol regen)
Fascinating! I guess build-and-measure really is the way to go. I'll try watching the oscillator on our scope this week. [email protected]> wrote:
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Ross Tucker (NS7F)
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#9221
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Re: Help aligning VFO
The OP has one particular advantage. My university bought three kits for student projects, so they are effectively free. My ham radio mentees are generally not able to spend $125 for a Bayou Jumper at
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Ross Tucker (NS7F)
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#9220
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Re: Help aligning VFO
Ross Build and see what you get. My own experience with the OP is that it's an exceptional AM signal receiver. At least one builder has added medium wave broadcast band reception. I imagine the
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Curt
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#9219
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Re: Help aligning VFO (Ozark Patrol regen)
I picked a random? T50-2 toroid out of the bag and wound 20 turns #26 with about 3/16" spacing on the ends. On the DE-5000 at 100 kHz test it measures even higher than toroids.info predicts--2.175
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Steve Ratzlaff
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#9218
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Re: Solder expring
For a business, sure makes perfect sense. I agree. For us hobbyist, does not matter. Can't tell the difference between what I recently bought new or the stuff that is many decades old. You think my
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Richard AG5M
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#9217
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Re: Help aligning VFO (Ozark Patrol regen)
Hi Ross, My experience with all iron powder toroids is there are always variations from toroid batch to batch, and actual? inductance can vary quite a bit--one measures the final inductance and
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Steve Ratzlaff
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#9216
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Re: Solder expring
I think it would be for liability reasons. A company that experiences a catastrophic disaster will endure investigations and inquires on their practices. Even if there's no evidence solder is degraded
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Jon Edwards
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#9215
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Re: Help aligning VFO (Ozark Patrol regen)
Thanks for the feedback! Also, btw: the schematic says L1 is 1.5 uH but 20 turns on a T50-2 is supposed to be 1.96 uH. Any thoughts on that? [email protected]> wrote:
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Ross Tucker (NS7F)
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#9214
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Re: The end of inexpensive printed circuit boards and parts
For those who consider just about any conversation as "political" -- I wasn't giving any political views. I was keeping it politically neutral. Not that I have to ask anyone's permission, however. We
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Matthew McDevitt N3AZ
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#9213
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